AU2011377040A1

AU2011377040A1 - Solar thermal energy electric power generation system, solar thermal energy electric power generation method, heating medium supplying system, and heating medium heating system

Info

Publication number: AU2011377040A1
Application number: AU2011377040A
Authority: AU
Inventors: Hideaki Ota
Original assignee: Kawasaki Heavy Industries Ltd; Kawasaki Jukogyo KK
Current assignee: Kawasaki Motors Ltd
Priority date: 2011-09-16
Filing date: 2011-09-16
Publication date: 2014-05-01
Also published as: WO2013038563A1

Abstract

A solar thermal power generation facility (10) which uses a heat medium that undergoes a phase change between a liquid phase and a gas phase. The solar thermal power generation facility (10) comprises: a first heating device (12) which heats the heat medium with solar heat that is a first heat; a second heating device (14) which increases the ratio of the gas phase in the heat medium by heating the heat medium with a second heat that is different from the solar heat after the heat medium has been heated by the first heating device (12); and a turbine power generator (18) which is driven by the heat medium that has been heated by the second heating device (14). The second heating device (14) is configured so that the heat held by another heat medium is used as the second heat for the purpose of heating the first mentioned heat medium.

Description

DESCRIPTION TITLE OF INVENTION Solar Thermal Energy Electric Power Generation System, Solar 5 Thermal Energy Electric Power Generation Method, Heating Medium Supplying System, and Heating Medium Heating System TECHNICAL FIELD The present invention relates to a solar thermal energy electric 10 power generation system and a solar thermal energy electric power generation method that utilize heating medium undergoing phase change between liquid phase and vapor phase and that utilize solar heat. The invention also relates a heating medium supplying system and a heating medium heating system that can be used in a solar thermal energy electric power generation system or such 15 a system that requires heating medium in vapor phase. BACKGROUND ART As disclosed in Patent Literature 1, for instance, a solar thermal energy electric power generation system as an example of a system that utilizes 20 heating medium and solar thermal energy (namely, solar heat) has been known. In the solar thermal energy electric power generation system disclosed in Patent Literature 1, a first heating medium heated by solar heat transmits the solar heat to a heat storage tank so that the solar heat is stored in the heat storage tank. A second heating medium is heated by the heat stored in the 25 heat storage tank and is subsequently heated further in a boiler device so as to be evaporated. The evaporated second heating medium drives a steam turbine generating device. In order to heat the heating medium by solar heat, a solar heat collecting device that collects the solar heat into the heating medium is used. 30 Among solar heat collecting devices are parabolic trough type heat collector, 568296AU - 2 Fresnel type heat collector, tower type heat collector, and the like (see Patent Literatures 2 and 3). As shown in Fig. 14, the parabolic trough type heat collector has parabolic trough mirrors 1010 each having a section in shape of a parabola. The parabolic trough mirrors 1010 are configured so as to reflect 5 sunlight toward a heat absorbing pipe 1012 which is provided at the focal point of the parabola and in which heating medium flows. Angles of inclination of the parabolic trough mirrors 1010 are adjusted in accordance with movement of the sun. As shown in Fig. 15, the Fresnel type heat collector has a plurality 10 of plane mirrors 1022. A heat absorbing pipe is provided above and in parallel with the plane mirrors 1022. The plane mirrors are configured so as to reflect sunlight toward the heat absorbing pipe 1020. An angle of inclination of each plane mirror 1022 is adjusted in accordance with movement of the sun. As shown in Figs. 16A and 16B, the tower type solar heat collector 15 has a tower 1032 including an top part 1030 in which heating medium flows and a plurality of plane mirrors 1034 (namely, to be referred to as heliostats hereinbelow) placed on a plurality of concentric circles, concentric semicircles or concentric polygons which have each of their centers on the tower 1032 and which have different distances from the tower 1032. The heliostats 1034 are 20 configured so as to reflect sunlight toward the top part 1030 of the tower 1032. An angle of inclination of each heliostat 1034 is adjusted in accordance with movement of the sun. Vacuum type pipes or non-vacuum type pipes are used as the heat absorbing pipes that are irradiated with the reflected sunlight (namely 25 heated by solar heat). The vacuum type pipe, having resistance to heat dissipation and little heat loss, is composed of a steel pipe through which the heating medium flows and a glass pipe enclosing the steel pipe, for instance. The space between the steel pipe and the glass pipe is kept in vacuum state. A coating film capable of selectively absorbing sunlight of specified wavelengths 30 is formed on the outer surface of the steel pipe. Such vacuum type pipes are 568296AU - 3 often used in such systems that oil is used as the heating medium and that the parabolic trough type heat collector is used as the heat collecting device. The non-vacuum type pipe is a simple steel pipe, for instance. The non-vacuum type pipe has more heat dissipation than the vacuum type 5 pipe, but has an advantage of a simple structure that realizes low manufacturing cost and easy handling. Such non-vacuum type pipes are often used in such systems that water is used as the heating medium and that the Fresnel type heat collector is used as the heat collecting device. In Patent Literature 4 is disclosed a pipe through which heating 10 medium flows and which stores heat of the heating medium. A solar thermal energy electric power generation system disclosed in Patent Literature 4 is configured so as to store the heat of the heating medium in heat storing medium provided in the pipe and so as to heat the heating medium by the heat stored in the heat storing medium. In order to selectively perform heat exchanging 15 between the heating medium and the heat storing medium, there are provided a main supply pipe thermally connected to the heat storing medium, a bypass pipe thermally isolated from the heat storing medium, and a control valve for making the heating medium flow to either the main supply pipe or the bypass pipe. 20 CITATION LIST Patent Literature PTL1: JP 2007-132330 A PTL2: JP 2010-058058 A 25 PTL3: JP 2009-197733 A PTL4: WO 2010/052710 SUMMARY OF INVENTION Technical Problem 5 6829 6AU -4 Intensity of solar thermal energy that reaches the ground (namely, to be referred to as Direct Normal Irradiance or DNI, abbreviated therefrom) changes according to seasons, hours, weather, places and the like. As changes in the direct normal irradiance in Denver, U.S.A. are shown in Figs. 5 17A-17C, for instance, hours of available sunlight are different according to calendar days, and the direct normal irradiance differs according to daily hours. The direct normal irradiance sharply changes with sudden change in such the weather as clouds block the sun. That is, there is a possibility that solar heat may not sufficiently heat the heating medium. Accordingly, there is a 10 possibility that sufficient electric power cannot be generated by a solar thermal energy electric power generation system which generates electric power by utilizing the heating medium sufficiently heated by solar heat, namely, the heating medium in vapor phase (such as water vapor). As measures to cope with the problem, it is conceivable to store in 15 a heat storing medium a portion of heat that the heating medium keeps after having been sufficiently or excessively by solar heat, and to heat the heating medium that has been heated insufficiently by solar heat, by using the heat stored in the heat storing medium, as described in the solar thermal energy electric power generation system disclosed in Patent Literature 4. In order to 20 make it possible to heat the heating medium at any time, however, it is required to provide a large quantity of heat storing medium for storing a large quantity of heat as well as a large container facility (namely, such as heat storage tank) for containing the large quantity of heat storing medium. As the result, this increases the scale of a solar thermal energy electric power generation system 25 that requires heating medium in vapor phase. Therefore, it is an object of the invention to sufficiently heat the heating medium without increasing the scale of the system even in such cases as short hours of available sunlight, low direct normal irradiance, and/or sharp change in direct normal irradiance. 30 568296AU -5- Solution to Problem In order to achieve the object, the invention is configured as follows. According to one aspect of the invention, there is provided a solar 5 thermal energy electric power generation system using a heating medium that undergoes phase change between liquid phase and vapor phase, the solar thermal energy electric power generation system comprising: a first heating device for heating the heating medium by solar heat as a first heat, a second heating device for heating the heating medium that has been heated by the first 10 heating device, by using a second heat that is different from the solar heat and thereby increasing a proportion of the heating medium in vapor phase, and a turbine generator device driven by the heating medium that has been heated by the second heating device, wherein the second heating device is configured so as to use the heat that is stored by another different heating medium, as the 15 second heat for heating the heating medium. According to a further aspect of the invention, there is provided a solar thermal energy electric power generation method using a heating medium that undergoes phase change between liquid phase and vapor phase, the solar thermal energy electric power generation method comprising: heating the 20 heating medium by solar heat that is a first heat, heating the heating medium that has been heated by the solar heat by using a second heat that is different from the solar heat and thereby increasing a proportion of the heating medium in vapor phase, generating electric power by driving a turbine generator device by the heating medium heated by the second heat, and using the heat that is 25 stored by another different heating medium, as the second heat for heating the heating medium. According to another aspect of the invention, there is provided a heating medium supplying system for supplying heating medium in vapor phase that undergoes phase change between liquid phase and vapor phase, the 30 heating medium supplying system comprising: a first heating device for heating 568296AU - 6 the heating medium by solar heat that is a first heat, and a second heating device for heating the heating medium that has been heated by the first heating device, by using a second heat that is different from the solar heat and thereby increasing a proportion of the heating medium in vapor phase, wherein the 5 second heating device is configured so as to use the heat that is stored by another heating medium, as the second heat for heating the heating medium. According to further another aspect of the invention, there is provided a heating medium heating system for heating a heating medium that undergoes phase change between liquid phase and vapor phase, the heating 10 medium heating system is configured: so as to receive the heating medium heated by solar heat that is a first heat, so as to increase a proportion of the heating medium in vapor phase of the received heating medium by heating by a second heat that is different from the solar heat, so as to receive another different heating medium from outside of the heating medium heating system, 15 and so as to use the heat that is stored by another different heating medium, as the second heat for heating the heating medium. Advantageous Effects of Invention According to the invention, the heating medium can sufficiently be 20 heated without increasing the scale of the system even in such case as short hours of available sunlight, low direct normal irradiance, and/or sharp change in direct normal irradiance. BRIEF DESCRIPTION OF DRAWINGS 25 These aspects and features of the invention will be apparent from the following description concerning preferred embodiments with reference to the accompanying drawings, in which: Fig. 1 is a conceptual illustration of an integrated solar combined cycle power plant in accordance with an embodiment 1 of the invention; 568296AU 7 Fig. 2 is a schematic configuration of the integrated solar combined cycle power plant shown of Fig. 1; Fig. 3 is a schematic configuration of a second heating device; Fig. 4 is a sectional view of the second heating device shown in 5 Fig. 3; Figs. 5A and 5B are graphs showing relations between direct normal irradiance (DNI) and electric power output of a steam turbine; Fig. 6 is a schematic configuration of a second heating device of a comparative example; 10 Fig. 7 is a sectional view of a second heating device of a modification of the embodiment 1; Fig. 8 is a schematic configuration of a second heating device in an integrated solar combined cycle power plant in accordance with an embodiment 2 of the invention; 15 Fig. 9 is a schematic configuration of a second heating device in an integrated solar combined cycle power plant in accordance with an embodiment 3 of the invention; Fig. 10 is a schematic configuration of a second heating device in an integrated solar combined cycle power plant in accordance with an 20 embodiment 4 of the invention; Fig. 11 is a schematic configuration of a solar thermal energy electric power generation system in accordance with an embodiment 5 of the invention; Fig. 12 is a conceptual illustration of an integrated solar combined 25 cycle cogeneration system in accordance with an embodiment 6 of the invention; Fig. 13 is a conceptual illustration of an integrated solar combined cycle cogeneration system in accordance with an embodiment 7 of the invention; 568296AU -8 Fig. 14 is an illustration showing a parabolic trough type heat collector; Fig. 15 is an illustration showing a Fresnel type heat collector; Figs. 16A and 16B are an illustration showing a tower type heat 5 collector; and Figs. 17A-17C are graphs showing changes in direct normal irradiance that differs according to calendar days and according to daily hours. DESCRIPTION OF EMBODIMENTS 10 Hereinbelow, embodiments of the invention will be described with reference to the drawings. (Embodiment 1) Fig. 1 conceptually shows a configuration of an integrated solar combined cycle power plant in accordance with an embodiment 1 of the 15 invention. The Integrated Solar Combined Cycle (ISCC) power plant 10 shown in Fig. 1 is an example of solar thermal energy electric power generation system in which electric power is generated by using solar heat and heating medium and includes a plurality of electric power generation sources. 20 Herein, "heating medium" refers to a fluid capable of flowing while storing heat. In the embodiment, inexpensive water is used as the heating medium undergoing phase change between liquid phase and vapor phase. As shown in Fig. 1, the integrated solar combined cycle power plant 10 has a solar field (namely, a first heating device) 12 for evaporating the 25 heating medium (namely, water) in liquid phase (namely, producing steam) by solar heat, a second heating device 14 for heating the heating medium having been heated by the solar heat (namely, the heating medium with small proportion of vapor phase) so as to increase the proportion of vapor phase, an exhaust heat recovery boiler device 16 for superheating the heating medium 30 having been heated by the second heating device 14 (namely, the heating 568296AU - 9 medium with large proportion of vapor phase), a steam turbine generator device 18 driven by the heating medium superheated by the exhaust heat recovery boiler device 16 (namely, the heating medium in vapor phase), and a gas turbine generating device 20 for generating electric power while supplying hot 5 exhaust gas (namely, as another different heating medium) to the second heating device 14 and the exhaust heat recovery boiler device 16. The solar field 12, the second heating device 14, the exhaust heat recovery boiler device 16, and the gas turbine generating device 20 form a heating medium supplying system according to the invention for supplying the 10 heating medium in vapor phase to the steam turbine generating device 18. Such a system is referred to as a gas turbine Combined Cycle Power Plant (CCPP) that generates electric power by using both the steam turbine generating device 18 and the gas turbine generating device 20 and in which the heating medium in liquid phase is heated and evaporated by the exhaust gas 15 discharged from the gas turbine generating device 20, is further superheated ,and is supplied to the steam turbine generating device for generating electric power. Fig. 2 shows a specific configuration of the integrated solar combined cycle power plant 10. Hereinbelow, a plurality of component 20 elements of the integrated solar combined cycle power plant 10 will be described in accordance with stepwise description on flow of the heating medium. The drawings show only principal component elements associated with the invention. There exist other component elements not shown. It must be noted that the plurality of component elements described hereinbelow are 25 these associated with the invention but are not all component elements required for the integrated solar combined cycle power plant 10. In one aspect of the invention, the solar field 12 includes Fresnel type heat collector 22 that heats the heating medium in liquid phase by solar heat. The Fresnel type heat collector 22 has a plurality of plane mirrors 22a for 30 heating the heating medium in liquid phase flowing in heat absorbing pipes 24. 568296AU -10 The plane mirrors 22a are configured so as to reflect sunlight so that the heat absorbing pipes 24 are irradiated with the reflected light. Angles of inclination of the plane mirrors 22a are adjusted according to movement of the sun. The Fresnel type heat collector 22 may be referred to as LFR (Linear Fresnel 5 Reflector) or CLFR (Compact Linear Fresnel Reflector). The Fresnel type heat collector 22 having the plurality of plane mirrors 22a of a simple structure and low cost is preferable as a heat collecting device for heating the heating medium by solar heat. The invention, however, imposes no limitations on the heat collecting device. Any heat collecting 10 device can be used so long as the device is capable of evaporating the heating medium in liquid phase by solar heat. For instance, a parabolic trough type heat collector (see Fig. 14) or a tower type heat collector (see Fig. 16A and 16B) may be used. The parabolic trough type heat collector has favorable efficiency of 15 heat collection and is commonly used for solar thermal energy electric power generation system with large power output of 30 MW or larger. As oil is usually used as the heating medium, there is a limitation on a temperature for use (namely, approximately 4000C, although the limitation depends on a type of the oil). In addition, the manufacturing cost of the palabolic trough type heat 20 collector is higher than that of the Fresnel type heat collector. The tower type heat collector has high sunlight concentrations. In such a system that molten salt is used as the heating medium, the heating medium can be heated to an extremely high temperature (namely, a temperature exceeding about 560*C in use of mixed salt of potassium nitrate 25 and sodium nitrate, for instance, though the temperature depends on a type of the molten salt). However, the high tower 1032 requires an earthquake resistance strength and a high output pump (not being shown) for supplying the heating medium to the top part 1030 of the tower 1032. The heat absorbing pipes 24 of the invention may be either the 30 vacuum type or the non-vacuum type. The vacuum type pipes have higher 568296AU - 11 efficiency of heat collection but involve high manufacturing cost. On the other hand, the non-vacuum type pipes have lower efficiency of heat collection than the vacuum type pipes but are advantageous in equipment cost because of its inexpensiveness. 5 As shown in Figs. 1 and 2, the heating medium (namely, vapor) having been evaporated by the heating of the solar field 12 flows out of the heat absorbing pipes 24 and passes through the second heating device 14. The heating medium is heated by the second heating device 14 and the proportion of the medium in vapor phase is increased so that a rated steam flow can be 10 supplied to the steam turbine generating device 18. After being heated by the second heating device 14, all portions of the heating medium is preferably turned into saturated state in which the vapor phase and the liquid phase coexist in equilibrium (namely, saturated vapor is produced). Details of the second heating device 14 will be described later. 15 The heating medium heated by the second heating device 14 is separated into vapor phase (namely, vapor) and liquid phase (namely, water) by a vapor-liquid separating device 26. The heating medium in liquid phase is returned to the solar field 12. The heating medium in vapor phase is supplied to and stored in a vapor storage tank (namely, buffer tank) 28. The heating 20 medium having changed it's phase into liquid phase while being stored in the vapor storage tank 28 is returned to the solar field 12. The heating medium in vapor phase stored in the vapor storage tank 28 is subsequently controlled by a flow control valve 30 so as to attain a rated steam flow for the steam turbine generating device 18, and is then 25 supplied to the exhaust heat recovery boiler device 16. The heating medium supplied from the vapor storage tank 28 to the exhaust heat recovery boiler device 16 mixes with the heating medium evaporated by an evaporator 16b, and flows into a superheater 16c. The heating medium (namely, superheated steam) superheated by the superheater 16c drives a steam turbine 18a of the 568296AU -12 steam turbine generating device 18, and the steam turbine 18a drives a generator 18b. The generator 18b generates electric power. After driving the steam turbine 18a, the heating medium in vapor phase is liquidized by a condenser 32. The liquidized heating medium is sent 5 by a pump 34, is heated by a feedwater heater 36, and is deaerated by a deaerator 38. A portion of the deaerated heating medium is supplied to the exhaust heat recovery boiler device 16 by a pump 40, and the other portion is supplied to the solar field 12 by a pump 42. The heating medium supplied to the exhaust heat recovery boiler device 16 is preheated by an economizer 10 (preheater) 16a, is evaporated by the evaporator 16b, and mixes with the heating medium supplied from the vapor storage tank 28. The exhaust gas discharged from the gas turbine 20a of the gas turbine generating device 20 is supplied to the exhaust heat recovery boiler device 16, as a heat for a purpose of preheating the heating medium in liquid 15 phase by the economizer 16a, for a purpose of evaporating the heating medium in liquid phase by the evaporator 16b, and for a purpose of superheating the heating medium in vapor phase by the superheater 16c. The gas turbine 20a is driven by combustion gas produced by combustion of fuel. The gas turbine 20a drives a generator 20b. The combustion gas having driven the gas turbine 20 20a is discharged as the exhaust gas having a high temperature. The exhaust gas supplied from the gas turbine generating device 20 to the exhaust heat recovery boiler device 16 is finally diffused in the air through a exhaust stack 46. A portion of the exhaust gas from the gas turbine generating device 20 is selectively supplied to the second heating device 14. 25 Fig. 3 schematically shows a configuration of the second heating device 14. Fig. 4 shows a section (A-A section) of the second heating device 14. A role of the second heating device 14 will be described below. As described above, the rated amount of steam (namely, the heating medium in 30 vapor phase)is required so that the steam turbine generating device 18 can 568296AU -13 generate the rated electric power. Figs. 5A and 5B show solar heat energy intensity (DNI) in one day (shown with chain lines), electric power generation by the steam turbine generating device 18 (shown with solid lines), and solar heat energy which the solar field 12 acquires (shown with two-dot chain lines). As 5 shown in Fig. 5B, the solar thermal energy acquired in the solar field 12 does not completely coincide with the electric power amount that is converted from the heat energy, because energy loss is caused by such as copper loss, iron loss, windage loss, sliding friction and/or the like in the steam turbine generating device 18, in a process of converting the solar thermal energy into the electrical 10 energy. For planning of the solar thermal energy electric power generation system, normally, the rated electric power output of the steam turbine generating device 18 is determined on the basis of average direct normal irradiance at a place where the solar field 12 is constructed. The reason is that 15 the maximum direct normal irradiance can be obtained for only a short period of time in one day, and that the steam turbine generating device must be operated at a partial load for almost all other periods of time of the day. As efficiency of the steam turbine is decreased in the operation at partial load, efficiency of power generation of the whole electricity generation system is decreased. 20 Therefore, it is rational to determine the rated electric power output of the steam turbine generating device 18 on the basis of the average direct normal irradiance rather than the maximum direct normal irradiance. Herein, "average direct normal irradiance" refers to an imaginary constant direct normal irradiance based on an assumption that the electric power generation amount, 25 which equals to electric power generation amount attained by using actual direct normal irradiance that changes in one day, is attained through calculation by using the imaginary constant direct normal irradiance. Specifically, a quantity of the heating medium in vapor phase produced in the solar field 12 by using such a solar heat that is provided by the average direct normal irradiance, 30 is calculated as the first step. As the second step, possible electric power 568296AU -14 generation amount is calculated in accordance with the calculated quantity of the heating medium in vapor phase. Specifications of the steam turbine generating device 18 are determined on the basis of the calculated electric power generation amount. 5 Fig. 5A shows such a day when the direct normal irradiance changing through the day exceeds the average direct normal irradiance for some hours. Fig. 5B shows a day when the direct normal irradiance through a day is below the average direct normal irradiance. In case that the direct normal irradiance exceeds the average 10 direct normal irradiance as shown in Fig. 5A, the heating medium coming from the solar field 12 has a larger proportion of vapor phase. Consequently, the rated steam flow or a larger flow can be obtained. Although the rated or larger power output can be generated, the steam turbine generating device 18 is operated so that the power output may not exceed the rated power output. 15 That is, such a situation occurs that a hatched portion of the solar thermal energy is not effectively used. In case that the direct normal irradiance in one day is lower than the average direct normal irradiance as shown in Fig. 5B, the heating medium coming from the solar field 12 has a smaller proportion of vapor phase. That 20 is, the rated steam flow cannot be obtained. Therefore, such a situation occurs that the power output of the steam turbine generating device 18 does not reach the rated electric power output. In consideration of these facts, the second heating device 14 of the invention is configured for heating the heating medium having been heated 25 by solar heat (namely, the solar field 12) so that the steam turbine generating device 18 can generate the rated amount of electric power without dumping the solar thermal energy. As shown in Figs. 3 and 4, the second heating device 14 has heating medium channels (namely, first channels) 50 through which the heating 30 medium passes from the solar field 12 to the vapor-liquid separating device 26, 568296AU -15 an exhaust gas channel (namely, second channel) 52 through which the hot exhaust gas passes after being discharged from the gas turbine generating device 20, a heating material 54 capable of storing heat, and a flow control valve 56 for regulating a flow rate of the exhaust gas flowing into the exhaust 5 gas channel 52. The flow control valve 56 is a part of a device for distributing the exhaust gas from the gas turbine generator device 20 into the second heating device 14 and the exhaust heat recovery boiler device 16. The heating medium channels 50 and the exhaust gas channel 52 are made of, for instance, steel pipes capable of performing efficient heat 10 exchange between inside spaces where the heating medium and the exhaust gas flow and outside of the spaces. The heating material 54 that absorbs a heat from other objects and store the heat therein, and that supplies the stored heat to other objects are such as sand, molten salt, and ceramic powder. The heating material 54 may 15 be gas such as sealed air. As shown in Fig. 4, the heating material 54 is directly and thermally connected to the heating medium channels 50 (namely, the heating medium) and is also directly and thermally connected to the exhaust gas channel 52 (namely, the exhaust gas). Thus, the heating material 54 is 20 capable of absorbing and storing heat from the heating medium or the exhaust gas and is capable of heating the heating medium by the stored heat (namely, capable of supplying the heat to the heating medium). That is, the exhaust gas and the heating medium are indirectly and thermally connected to each other through the heating material 54. 25 The flow control valve 56 is configured so as to regulate a quantity of the exhaust gas that flows into the exhaust gas channel 52 on the basis of a quantity of the heating medium in vapor phase that flows into the heating medium channels 50. A flow measuring device 58, a pressure measuring device 60, and a temperature measuring device 62 are provided in order to 30 measure the quantity of the heating medium in vapor phase that flows into the 568296AU -16heating medium channels 50. The quantity of the heating medium in vapor phase that flows into the heating medium channels 50 is calculated on the basis of a flow rate of the heating medium measured by the flow measuring device 58, a pressure of the heating medium measured by the pressure measuring 5 device 60, and a temperature of the heating medium measured by the temperature measuring device 62. The calculation of the quantity of the heating medium in vapor phase that flows into the heating medium channels 50 in the second heating device 14, and the control of the flow control valve 56 on the basis of the 10 calculated results are carried out by a main computer (not being shown) of the integrated solar combined cycle power point 10. The main computer controls namely devices such as the steam turbine generating device 18, the gas turbine generating device 20, the condenser device, the deaerator, the flow control valve 30, the pumps 34, 40, 42 and the like. Another computer built in the 15 second heating device 14 may be used, in stead of the main computer, in order to carry out the calculation of the quantity of the heating medium in vapor phase that flows into the heating medium channels 50 and the control of the flow control valve 56 on the basis of the calculated results. Thus, the second heating device 14 can easily be integrated into an existing facility. 20 The second heating device 14 is configured so as to absorb the stored heat in the heating medium by the heating material 54 in case that the quantity of the heating medium in vapor phase being supplied from the solar field 12 is larger than a specified quantity. The second heating device 14 is configured so as to heat the heating medium by the stored heat in the heating 25 material 54 in case that the quantity of the heating medium in vapor phase is smaller than the specified quantity. Herein, "specified quantity" of the heating medium in vapor phase is a quantity calculated on the basis of a quantity that is lost before arriving at the steam turbine generating device 18, and a rated quantity. 568296AU - 17 In the embodiment, for instance, the quantity of the exhaust gas that flows into the exhaust gas channel 52 through the flow control valve 56 is regulated so that the heating material 54 may have a constant specified temperature (namely, a temperature corresponding to a specified quantity of the 5 stored heat). The specified temperature is preferably set at such a temperature that heat does not transfer from the heating medium to the heating material 54 in case that the quantity of the heating medium in vapor phase flowing through the heating medium channels 50 is nearly as large as the specified quantity. For that purpose, a temperature measuring device 64 for 10 measuring a temperature of the heating material 54 is provided in the second heating device 14. The temperature measuring device 64 may be provided at any position in the second heating device 14 so long as a temperature correlated with the temperature (namely, the quantity of the stored heat) of the heating material 54 can be measured. 15 In case that the quantity of the heating medium in vapor phase flowing through the heating medium channels 50 exceeds the specified quantity while the heating material 54 is kept at the specified constant temperature, the quantity of the exhaust gas that flows into the exhaust gas channel 52 is decreased. As the result, the quantity of the stored heat in the heating material 20 54 is decreased so that a portion of the stored heat in the heating medium is absorbed by the heating material 54. In case that the quantity of the heating medium in vapor phase falls below the specified quantity, the supplied quantity of the exhaust gas is increased. As the result, the quantity of the stored heat in the heating material 54 is increased so that a portion of the stored heat in the 25 heating material 54 is supplied to the heating medium. Thus, the quantity of the heating medium in vapor phase coming out from the second heating device 14 can be kept at the specified quantity. When an operation of the integrated solar combined cycle power plant 10 is started, the exhaust gas may be made to flow into the exhaust gas 30 channel 52 by operating the flow control valve 56 for a purpose of increasing 568296AU -18 the quantity of the stored heat in the heating material 54, or for a purpose of warming the heating medium channels 50 and the exhaust gas channel 52, that is, for a purpose of warming the second heating device 14. Advantages of the second heating device 14 having such a 5 configuration will be described below. In one advantage, the exhaust gas can effectively be utilized, and availability of solar thermal energy is increased by the effect. In another advantage, the quantity of the heating material 54 can be decreased. For describing this more specifically, Fig. 6 shows a second 10 heating device in a comparative example that heats a heating medium, being supplied from the solar field, only by a heating material without using an exhaust gas. In the second heating device 114, in case that a quantity of stored heat in the heating material 154 is near the lower limit and that the quantity of 15 the heating medium in vapor phase being supplied from the solar field 12 is nearly as large as a specified quantity, the heat of the heating medium is absorbed by the heating material 154 in spite of that there is no need for the heating material 154 to absorb the heat of the heating medium. Therefore, it is necessary to provide a bypass channel 166 through which the heating medium 20 flows while avoiding thermal connection to the heating material 154. On the other hand, in the second heating device 14 of the embodiment 1 of Figs. 2 and 3, the temperature (namely, the quantity of the stored heat) of the heating material 54 is kept constant by the exhaust gas, and thus the heat of the heating medium is not absorbed so much by the heating 25 material 54. In the second heating device 114 of the comparative example, in case that the quantity of the stored heat in the heating material 154 is near the lower limit and that the quantity of the heating medium in vapor phase being supplied from the solar field 12 falls below the specified quantity, the heating 30 medium cannot be heated by the stored heat in the heating material 154. 568296AU -19 Therefore, the electric power generated by the steam turbine generating device 18 is decreased. In consideration of this, a large quantity of heating material 154 is required. On the other hand, in the second heating device 14 of the 5 embodiment 1 of Figs. 2 and 3, the heating medium can be heated because the temperature (namely, the quantity of the retained heat) of the heating material 54 is kept constant by the exhaust gas and because the quantity of the exhaust gas that flows into the exhaust gas channel 52 can be increased. In the second heating device 114 of the comparative example, in 10 case that the quantity of the stored heat in the heating material 54 is near the upper limit and that the quantity of the heating medium in vapor phase being supplied from the solar field 12 exceeds the specified quantity, the heating material 154 can not absorb the heat of the heating medium. The second heating device 114 of the comparative example is configured so as to heat the 15 heating medium by the stored heat in the heating material 154, and thus the heating material 154 is thermally isolated from outside (namely, heat dissipation from the heating material 154 is suppressed). In consideration of this, a large quantity of heating material 154 is required. In the second heating device 14 of the embodiment 1, in case that 20 the quantity of the stored heat in the heating material 54 is near the upper limit and that the quantity of the heating medium in vapor phase being supplied from the solar field 12 exceeds the specified quantity, the supply of the exhaust gas into the exhaust gas channel 52 is stopped. As the result, the heat of the heating medium can be absorbed by the heating material 54 by decreasing the 25 quantity of the stored heat in the heating material 54. That is, the stoppage of the supplying the exhaust gas causes a portion of the stored heat in the heating material 54 to transfer into the exhaust gas channel 52 and to diffuse in the air through a exhaust stack 48. In consideration of these facts, the bypass channel 166 and the 30 large quantity of heating material 154 are required in the second heating device 56829 6AU -20 114 of the comparative example. Besides, a large container tank is required for containing the large quantity of heating material 154. This increases the scale of the whole power plant. In the contrary, the second heating device 14 of the embodiment 1 5 does not require a large quantity of heating material 54 and thus the whole power plant becomes compact. The invention may include any bypass channel for avoiding heat exchange between the heating medium and the heating material 54. In case that the specified quantity of the heating medium in vapor phase is frequently 10 supplied from the solar field 12, the second heating device 14 preferably includes the bypass channel. As shown in Fig. 7, the heating medium channels 50 (namely, the heating medium) and the exhaust gas channel 52 (namely, the exhaust gas) may directly and thermally connected to each other so that the heating medium 15 can directly be heated by the exhaust gas. This configuration makes it possible to attain quicker response to sharp change in direct normal irradiance (namely, sharp change in the quantity of the heating medium in vapor phase) than such a configuration that the heating medium is indirectly heated through the heating material 54 by the exhaust gas as shown in Fig. 4. When the 20 quantity of the heating medium in vapor phase flowing through the heating medium channels 50 is sharply decreased by a sudden change in the weather, for instance, the quantity of the exhaust gas flowing through the exhaust gas channel 52 can be increased so that the heating medium can quickly be heated by a portion of the stored heat in the exhaust gas (namely, the heat that 25 transfers into the heating medium channels 50). As shown in Fig.3, the quantity of the heating medium in vapor phase is measured (namely, calculated by using the flow measuring device 58, the pressure measuring device 60, and the temperature measuring device 62) before the heating medium flows into the heating medium channels 50, namely, 30 before the heat exchanging is performed between the heating medium and the 568296AU -21 heating material 54, whereas the invention is not limited thereto. The quantity of the heating medium in vapor phase may be measured after the heating medium flows out of the heating medium channels 50, namely, after the heat exchanging is performed between the heating medium and the heating material 5 54. In this case, the quantity of the exhaust gas that flows into the exhaust gas channel 52 (namely, control of the flow control valve 56) on the basis of the quantity of the heating medium in vapor phase is adjusted by feedback control. The quantity of the heating medium in vapor phase is measured (namely, calculated) for regulating the quantity of the exhaust gas supplied into 10 the exhaust gas channel 52 of the second heating device 14, whereas the invention is not limited thereto. The quantity of the exhaust gas supplied into the exhaust gas channel 52 can be regulated on the basis of a result of measurement of the quantity of the heating medium in liquid phase. A flow measuring device 68 for measuring the quantity of the heating medium in liquid 15 phase separated by the vapor-liquid separating device 26 is provided for instance as shown in Fig. 2, and the quantity of the exhaust gas is supplied through the flow control valve 56 into the exhaust gas channel 52 is regulated on the basis of the quantity of the heating medium in liquid phase measured by the flow measuring device 68. When the quantity of the heating medium in 20 liquid phase measured by the flow measuring device 68 increases, for instance, the quantity of the exhaust gas supplied through the flow control valve 56 into the exhaust gas channel 52 is increased. When the quantity of the heating medium in liquid phase measured by the flow measuring device 68 decreases, the quantity of the exhaust gas supplied through the flow control valve 56 into 25 the exhaust gas channel 52 is decreased. Concerning to the flow measuring device 68, the supply of the exhaust gas into the exhaust gas channel 52 in the second heating device 14 is stopped when the quantity of the heating medium in liquid phase measured by the flow measuring device 68 is nearly as large as a quantity of the heating 30 medium in liquid phase before being heated by the solar field 12 (namely, the 568296AU -22 quantity of the heating medium which a pump 42 supplies to the solar field 12). The fact that the quantity of the heating medium in liquid phase measured by the flow measuring device 68 is nearly as large as the quantity of the' heating medium in liquid phase before being heated by the solar field 12 indicates that 5 the heating medium can not be heated by the solar field 12 because of low direct normal irradiance. Namely, it means that the quantity of the heating medium in vapor phase does not increase, though the heating medium is heated by the second heating device 14. Therefore, in this case, the supply of the exhaust gas to the second heating device 14 is stopped. 10 The quantity of the heating medium in liquid phase supplied to the solar field 12 (namely, the quantity of the heating medium which the pump 42 supplies to the solar field 12) may be regulated on the basis of the quantity of the heating medium in liquid phase measured by the flow measuring device 68. For instance, when the quantity of the heating medium in liquid phase 15 measured by the flow measuring device 68 increases, the quantity of the heating medium in liquid phase supplied by the pump 42 to the solar field 12 is decreased. When the quantity of the heating medium in liquid phase measured by the flow measuring device 68 decreases, the quantity of the heating medium in liquid phase supplied by the pump 42 to the solar field 12 is 20 increased. Thus, the second heating device 14 can fulfill its heating ability. That is, such a large supply quantity of heating medium in liquid phase that exceeds the heating ability (namely, ability to evaporate the heating medium in liquid phase) of the second heating device 14 is suppressed, and a sufficient supply quantity of heating medium in liquid phase that the second heating 25 device 14 can heat well enough is supplied to the second heating device 14. In the embodiment 1, the heating medium can sufficiently be heated without increasing in the scale of the integrated solar combined cycle power plant 10 even in such cases as short hours of avaiable sunlight, low direct normal irradiance, and/or sharp change in direct normal irradiance. 30 Thus, the heating medium can sufficiently be evaporated so that the integrated 568296AU -23 solar combined cycle power plant 10 is capable of generating sufficient electric power. (Embodiment 2) 5 An integrated solar combined cycle power plant in accordance with an embodiment 2 is the same as that of the embodiment 1 except for the second heating device. Hereinbelow, a second heating device in accordance with the embodiment 2 will be described. Fig. 8 shows the second heating device 214 of the embodiment 2. 10 Unlike the second heating device 14 of the embodiment 1, the second heating device 214 of the embodiment 2 has no heating material. Heating medium channels 250 (namely, heating medium) and an exhaust gas channel 252 (namely, exhaust gas) are thermally connected to each other. In the second heating device 214 of the embodiment 2, in case 15 that a quantity of the heating medium in vapor phase supplied from the solar field 12 (namely, quantity of the heating medium in vapor phase calculated on the basis of results of measurements by a flow measuring device 258, a pressure measuring device 260, and a temperature measuring device 262) exceeds a specified quantity, supply of exhaust gas into the exhaust gas 20 channel 252 is stopped by a flow control valve 256. While the heating medium flows through the heating medium channels 250, a portion of the stored heat enters the exhaust gas channel 252 and diffuses in the air through the exhaust stack 48. In case that the quantity of the heating medium in vapor phase 25 being supplied from the solar field 12 is below the specified quantity, the quantity of the exhaust gas supplied into the exhaust gas channel 252 is regulated by the flow control valve 256 on the basis of the quantity of the heating medium in vapor phase. The second heating device 214 of the embodiment 2 has no 30 heating material and is made more compact than the second heating device 14 56829 6AU -24 of the embodiment 1. As there is no heating material, the device can not absorb nor keep stored heat in the heating medium. Namely, it is impossible to absorb and store a portion of the stored heat in the heating medium by heating material in case that the quantity of the heating medium in vapor phase 5 which is supplied from the solar field 12 exceeds the specified quantity. And, it is impossible to use stored heat in heating material for heating the heating medium. In case that the specified quantity of the heating medium in vapor phase is frequently supplied from the solar field 12, the second heating device 10 214 preferably includes a bypass channel thermally isolated from the exhaust gas channel 252. (Embodiment 3) An integrated solar combined cycle power plant of an embodiment 15 3 is the same as that of the embodiment 1 except for the second heating device. Hereinbelow, a second heating device in accordance with the embodiment 3 will be described. Fig. 9 shows the second heating device 314 of the embodiment 3. In the second heating device 314 of the embodiment 3, unlike the second 20 heating device 14 of the embodiment 1, heating material 354 and an exhaust gas channel 352 (namely, an exhaust gas) are thermally isolated from each other. That is, heat is not exchanged between the heating material 354 and the exhaust gas. For that reason, the second heating device 314 has heating 25 medium channels 350a thermally connected only to the exhaust gas channel 352, heating medium channels 350b thermally connected only to the heating material 354, and flow control valves 356b, 356c for supplying the heating medium to at least either the heating medium channels 350a or the heating medium channels 350b. 568296AU -25 In the second heating device 314 of the embodiment 3, three flow control valves 356a, 356b, and 356c are controlled on the basis of a quantity of the heating medium in vapor phase coming from the solar field 12. And the quantity of the heating medium in vapor phase is calculated on the basis of 5 results of measurements by a flow measuring device 358, a pressure measuring device 360, and a temperature measuring device 362 and a result of a measurement by a temperature measuring device 368 (a quantity of stored heat in the heating material 354). For instance, in case that the quantity of the heating medium in 10 vapor phase being supplied from the solar field 12 is below a specified quantity, a portion of the heating medium is supplied into the heating medium channels 350a in order to be heated by the exhaust gas, and the other portion of the heating medium is supplied into the heating medium channels 350b in order to be heated by the heating material 354. 15 The second heating device 314 having such a configuration is capable of accurately controlling a quantity of the heating medium in vapor phase to be supplied to the vapor-liquid separating device 26. In case that the specified quantity of the heating medium in vapor phase is frequently supplied from the solar field 12, the second heating device 20 314 preferably includes a bypass channel thermally isolated from the exhaust gas channel 352 and the heating material 354 (Embodiment 4) An integrated solar combined cycle power plant of an embodiment 25 4 is the same as that of the embodiment I except for the second heating device. Hereinbelow, a second heating device in accordance with the embodiment 4 will be described. Fig. 10 shows the second heating device 414 of the embodiment 4. In the second heating device 414 of the embodiment 4, unlike the second 30 heating device 14 of the embodiment 1, heating material 454 and an exhaust 568296AU -26 gas channel 452 (namely, an exhaust gas) are thermally isolated from each other. Heat is not exchanged between the heating material 454 and the exhaust gas. The second heating device 414 has heating medium channels 5 450a thermally connected only to the exhaust gas channel 452, and heating medium channels 450b thermally connected only to the heating material 454. The second heating device 414 is configured so that the heating medium having passes through the heating medium channels 450b inevitably flows through the heating medium channels 450a (namely, the heating device 414 is different 10 from the embodiment 3 in this regard). In the second heating device 414 of the embodiment 4, a flow control valve 456 is controlled on the basis of a quantity of the heating medium in vapor phase coming from the solar field 12. The quantity of the heating medium in vapor phase is calculated on the basis of results of measurements 15 by a flow measuring device 458, a pressure measuring device 460, and a temperature measuring device 462 and a result of the measurement by a temperature measuring device 468 (namely, a quantity of stored heat in the heating material 454). In case that the quantity of the heating medium in vapor phase 20 being supplied from the solar field 12 is below a specified quantity, the heating medium is heated by the heating material 454 while passing through the heating medium channels 450b, and is subsequently heated by the exhaust gas flowing through the exhaust gas channel 452 while passing through the heating medium channels 450a. 25 The second heating device 414 having such a configuration can accurately control a quantity of the heating medium in vapor phase to be supplied to the vapor-liquid separating device 26. A structure of the second heating device 414 of the embodiment 4 is simpler than that of the second heating device 314 of the embodiment 3. 568296AU -27 In case that the specified quantity of the heating medium in vapor phase is frequently supplied from the solar field 12, the second heating device 414 preferably includes a bypass channel thermally isolated from the exhaust gas channel 452 and a bypass channel thermally isolated from the heating 5 material 454. (Embodiment 5) The embodiment 1 is the integrated solar combined cycle power plant including the plurality of electric power generation sources, whereas an 10 embodiment 5 is a solar thermal energy electric power generation system including one electric power generation source. Fig. 11 shows a specific configuration of the solar thermal energy electric power generation system 510 of the embodiment 5. A first difference from the embodiments 1, 2, 3, and 4 described above is that no gas turbine 15 generating device is provided. A second difference is the configuration of the boiler device. Therefore, description will be given mainly on the differences from the embodiments 1, 2, 3, and 4 described above. The solar thermal energy electric power generation system 510 of the embodiment 5 includes no gas turbine generating device and gas turbine 20 exhaust gas having a high temperature is not provided to a boiler device 516. Instead of that, the boiler device 516 includes a combustion device 516d for receiving fuel and air and providing combustion of the fuel. By combustion gas (namely, exhaust gas) produced by the combustion device 516d, a heating medium in liquid phase being supplied from 25 a pump 540 is preheated through an economizer 516a and is evaporated through an evaporator 516b. By using the exhaust gas, the heating medium in vapor phase supplied from an vapor storage tank 528 and the heating medium in vapor phase being supplied from the evaporator 516b are superheated through a superheater 516c. 5682 96AU -28 The exhaust gas from the combustion device 516d is used for heating the heating medium and is distributed from the boiler device 516 into the second heating device 514 and to a exhaust stack 546. The exhaust gas having flowed into in the second heating device 514 heats the heating medium 5 being supplied from the solar field 512. Like the integrated solar combined cycle power plant 10 of the embodiment 1, the solar thermal energy electric power generation system 510 of the embodiment 5 can sufficiently heat the heating medium without increasing in the scale of the power generation system even in such cases as 10 short hours of available sunlight, low direct normal irradiance, and/or sharp change in direct normal irradiance. Thus, the heating medium can sufficiently be evaporated. As the result, the solar thermal energy electric generation system 510 can generate sufficient electric power. 15 (Embodiment 6) An embodiment 6 is an integrated solar combined cycle cogeneration system that includes a plurality of electric power generation sources and that can supply heat. Fig. 12 conceptually shows a configuration of the integrated solar 20 combined cycle cogeneration system in accordance with the embodiment 6. The integrated solar combined cycle cogeneration system 610 of the embodiment 6 has a heating medium supplying system including a solar field 612, a second heating device 614, and a diesel electric power generating device 662, as the heating medium supplying system for supplying heating 25 medium in vapor phase to a steam turbine generating device 618. The system further has a heat exchanger 664 for warming water by using exhaust heat of the diesel electric power generating device 662. The solar field 612, the second heating device 614, and the steam turbine generating device 618 are the same as those of the embodiments 1, 2, 3, 4, and 5 described above. 568296AU -29 The diesel electric power generating device 662 has a diesel engine 662a and a generator 662b that is driven by the diesel engine 662a. The diesel engine 662a receives fuel and drives the generator 662b, while supplying hot exhaust gas to the second heating device 614. 5 The heat exchanger 664 is configured so as to exchange heat between a first coolant water having a high temperature after cooling the diesel engine 662a and a second different water. Thus, hot water can be obtained. Like the integrated solar combined cycle power plant 10 of the embodiment 1, the integrated solar combined cycle cogeneration system 610 of 10 the embodiment 6 can sufficiently heat the heating medium without increasing the scale of the system even in such cases as short hours of available sunlight, low direct normal irradiance, and/or sharp change in direct normal irradiance. Thus, the heating medium can sufficiently be evaporated. As the result, the integrated solar combined cycle cogeneration system 610 can generate 15 sufficient electric power. Besides, the system can also supply heat (namely, hot water). (Embodiment 7) An embodiment 7 is an integrated solar combined cycle 20 cogeneration system that includes one electric power generation source and that can supply cool air. Fig. 13 conceptually shows a configuration of the integrated solar combined cycle cogeneration system in accordance with the embodiment 7. The integrated solar combined cycle cogeneration system 710 of the 25 embodiment 7 has a heating medium supplying system including a solar field 712, a second heating device 714, and a gas turbine generating device 720, as the heating medium supplying system for supplying heating medium in vapor phase. The system further has an absorption type chiller 766 to which the heating medium in vapor phase is supplied from the heating medium supplying 30 system. The solar field 712 and the second heating device 714 are the same 568296AU -30 as those of the embodiments 1, 2, 3, 4, 5, and 6 described above, and an exhaust heat recovery boiler device 716 and the gas turbine generating device 720 are the same as those of the embodiments 1, 2, 3, and 4 described above. In the embodiment 7, the heating medium in vapor phase having 5 passed through the solar field 712, the second heating device 714, and the exhaust heat recovery boiler device 716 is used for producing cool air. For that purpose, there is provided the absorption type chiller 766 that produces cool air by using the heating medium in vapor phase having a high temperature. Like the integrated solar combined cycle power plant 10 of the 10 embodiment 1, the integrated solar combined cycle cogeneration system 710 of the embodiment 7 can sufficiently heat the heating medium without increasing the scale of the system even in such cases as short hours of available sunlight, low direct normal irradiance, and/or sharp change in direct normal irradiance. Thus, the heating medium can sufficiently be evaporated. As the result, the 15 integrated solar combined cycle cogeneration system 710 can generate sufficient electric power. Besides, the system can supply cool air. The invention has been described with respect to the preferred embodiments with reference to the accompanying drawings; however, various changes and modifications are apparent to those skilled in the art. It is to be 20 noted that such changes and modifications are included within the scope of the invention unless departing from the scope of the invention as defined in the appended claims. INDUSTRIAL APPLICABILITY 25 The invention can be applied to any solar thermal energy electric power generation system and any solar thermal energy electric power generation method by which electric power is generated with utilization of heating medium heated by solar heat. The heating medium supplying system and the heating medium heating system in accordance with the invention can 30 be applied to any system that requires heating medium in vapor phase. For 568296AU -31 instance, the heating medium in vapor phase that is obtained from the heating medium supplying system and the heating medium heating system in accordance with the invention can be used as a driving source for a turbo compressor for producing compressed air or as a heat source for a drier. 5 REFERENCE SIGNS LIST 10 solar thermal energy electric generation power system (namely, integrated solar combined cycle power plant) 12 first heating device (namely, solar field) 10 14 second heating device 18 turbine generating device (namely, steam turbine generator device) 56829 6AU

Claims

1. A solar thermal energy electric power generation system using heating medium that undergoes phase change between liquid phase and vapor 5 phase, the solar thermal energy electric power generation system comprising: a first heating device for heating the heating medium by solar heat that is a first heat, a second heating device for heating the heating medium, having been heated by the first heating device, by a second heat that is different from 10 the solar heat and thereby increasing a proportion of the heating medium in vapor phase, and a turbine generating device driven by the heating medium heated by the second heating device, wherein the second heating device is configured so as to use heat, stored 15 by another different heating medium, as the second heat for heating the heating medium.

2. The solar thermal energy electric power generation system according to Claim 1, wherein the second heating device comprises a first channel through which the heating medium having been heated by the first 20 heating device flows and a second channel which is located near the first channel and through which another different heating medium flows.

3. The solar thermal energy electric power generation system according to Claim 2, further comprising an inflow regulating device for regulating an inflow rate of another different heating medium that flows into the 25 second channel of the second heating device, and a gas quantity measuring device for measuring a quantity of the heating medium in vapor phase, wherein the inflow regulating device regulates the inflow rate of another different heating medium that flows into the second channel on the basis of the 568296AU - 33 quantity of the heating medium in vapor phase measured by the gas quantity measuring device.

4. The solar thermal energy electric power generation system according to Claim 2, further comprising an inflow regulating device for 5 regulating an inflow rate of another different heating medium that flows into the second channel of the second heating device, and a vapor-liquid separating device for separating the heating medium having been heated by the second heating device into vapor phase and liquid phase, wherein 10 the inflow regulating device regulates the inflow rate of another different heating medium that flows into the second channel on the basis of a quantity of the heating medium in liquid phase separated by the vapor-liquid separating device.

5. The solar thermal energy electric power generation system 15 according to Claim 2, further comprising an inflow regulating device for regulating an inflow rate of another different heating medium that flows into the second channel of the second heating device, and a supplying device for supplying the heating medium in liquid phase to the first heating device, and 20 a vapor-liquid separating device for separating the heating medium having been heated by the second heating device into vapor phase and liquid phase, wherein the solar thermal energy electric power generation system is configured so that the inflow regulating device stops inflow of another different 25 heating medium into the second channel in case that a quantity of the heating medium in liquid phase which the supplying device supplies to the first heating device is nearly as large as a quantity of the heating medium in liquid phase separated by the vapor-liquid separating device.

6. The solar thermal energy electric power generation system 30 according to Claim 2, further comprising an inflow regulating device for 568296AU -34 regulating an inflow rate of another different heating medium that flows into the second channel of the second heating device, and a temperature measuring device for measuring an inside temperature of the second heating device, wherein 5 the inflow regulating device is configured so as to regulate the inflow rate of another different heating medium that flows into the second channel so that the temperature measured by the temperature measuring device is kept constant.

7. The solar thermal energy electric power generation system 10 according to Claim 2, further comprising an inflow regulating device for regulating an inflow rate of another different heating medium that flows into the second channel of the second heating device, wherein the inflow regulating device is configured so as to warm the second heating device by making another different heating medium flow into the 15 second channel before the first heating device starts heating the heating medium.

8. The solar thermal energy electric power generation system according to Claim 1, further comprising a device for discharging an exhaust gas having a high temperature, wherein 20 the exhaust gas is used as another different heating medium.

9. The solar thermal energy electric power generation system according to Claim 8, wherein the device for discharging the exhaust gas having the high temperature is an electric power generating device.

10. The solar thermal energy electric power generation system 25 according to Claim 8, further comprising an exhaust gas distributing device for distributing the exhaust gas into the second heating device and an exhaust heat recovery boiler device.

11. The solar thermal energy electric power generation system according to Claim 10, wherein the exhaust heat recovery boiler device 568296AU -35 superheats the heating medium having been heated by the second heating device.

12. The solar thermal energy electric power generation system according to any one of Claims 1 through 11, wherein the second heating 5 device comprises a heating material for absorbing the heat from the heating medium and storing the heat therein and is configured so as to use the stored heat in the heating material as the second heat for heating the heating medium.

13. The solar thermal energy electric power generation system according to Claim 12, further comprising a gas quantity measuring device for 10 measuring a quantity of the heating medium in vapor phase, wherein the second heating device is configured so as to absorb the heat from the heating medium by the heating material in case that the quantity of the heating medium in vapor phase measured by the gas quantity measuring device is larger than a specified quantity, and 15 so as to heat the heating medium by the stored heat in the heating material in case that the quantity of the heating medium in vapor phase measured by the gas quantity measuring device is smaller than the specified quantity.

14. The solar thermal energy electric power generation system 20 according to Claim 12, further comprising a vapor-liquid separating device for separating the heating medium having been heated by the second heating device into vapor phase and liquid phase, wherein the second heating device is configured so as to absorb the heat from the heating medium by the heating material in case that a quantity of the 25 heating medium in liquid phase separated by the vapor-liquid separating device is smaller than a specified quantity, and so as to heat the heating medium by the stored heat in the heating material in case that the quantity of the heating medium in liquid phase separated by the vapor-liquid separating device is larger than the specified 30 quantity. 568296AU -36

15. The solar thermal energy electric power generation system according to Claim 1, further comprising a supplying device for supplying the heating medium in liquid phase to the first heating device, and a vapor-liquid separating device for separating the heating 5 medium having been heated by the second heating device into vapor phase and liquid phase, wherein a quantity of the heating medium in liquid phase that the supplying device supplies to the first heating device is regulated on the basis of a quantity of the heating medium in liquid phase separated by the vapor-liquid separating 10 device.

16. The solar thermal energy electric power generation system according to Claim 1, wherein the first heating device comprises a Fresnel type heat collector, a parabolic trough type heat collector, or a tower type heat collector, for heating the heating medium by solar heat. 15

17. The solar thermal energy electric generation power system according to Claim 1, wherein the heating medium is water.

18. A solar thermal energy electric power generation method using heating medium that undergoes phase change between liquid phase and vapor phase, the solar thermal energy electric power generation method comprising: 20 heating the heating medium by solar heat that is a first heat, heating the heating medium, having been heated by the solar heat, by a second heat that is different from the solar heat and thereby increasing a proportion of the heating medium in vapor phase, generating electric power by driving a turbine generating device by 25 the heating medium heated by the second heat, and using heat, stored by another different heating medium, as the second heat for heating the heating medium.

19. The solar thermal energy electric power generation method according to Claim 18, comprising heating the heating medium by the heat of 30 another different heating medium, by passing the heating medium, having been 568296AU -37 heated by the solar heat, through a first channel and by passing another different heating medium through a second channel that is located near the first channel.

20. The solar thermal energy electric power generation method 5 according to Claim 19, comprising measuring a quantity of the heating medium in vapor phase, and regulating an inflow rate of another different heating medium that flows into the second channel on the basis of the quantity of the heating medium in vapor phase. 10

21. The solar thermal energy electric power generation method according to Claim 19, comprising separating the heating medium, having been heated by the heat of another different heating medium, into vapor phase and liquid phase by a vapor-liquid separating device, and regulating an inflow rate of another different heating medium into 15 the second channel on the basis of a quantity of the heating medium in liquid phase separated by the vapor-liquid separating device.

22. The solar thermal energy electric power generation method according to Claim 19, comprising separating the heating medium, having been heated by the heat of another different heating medium, into vapor phase and 20 liquid phase by a vapor-liquid separating device, and stopping inflow of the different heating medium into the second channel in case that a quantity of the heating medium in liquid phase before being heated by the solar heat is nearly as large as a quantity of the heating medium in liquid phase separated by the vapor-liquid separating device. 25

23. The solar thermal energy electric power generation method according to Claim 19, comprising regulating an inflow rate of another different heating medium flowing into the second channel so that an inside temperature of the second channel is kept constant.

24. The solar thermal energy electric power generation method 30 according to Claim 19, comprising warming the first and the second channels by 568296AU -38 making the different heating medium flow into the second channel before starting heating the heating medium by the solar heat.

25. The solar thermal energy electric power generation method according to Claim 18, wherein an exhaust gas having a high temperature is 5 used as another different heating medium.

26. The solar thermal energy electric power generation method according to Claim 25, wherein the exhaust gas having the high temperature is an exhaust gas discharged from a different electric power generating device.

27. The solar thermal energy electric power generation method 10 according to Claim 25, comprising distributing the exhaust gas into the second channel and an exhaust heat recovery boiler device.

28. The solar thermal energy electric power generation method according to Claim 27, comprising superheating the heating medium, having been heated by the heat of another different heating medium, by using the 15 exhaust heat recovery boiler device.

29. The solar thermal energy electric power generation method according to any one of Claims 18 through 28, comprising absorbing and storing heat from the heating medium by a heating material, and using the stored heat in the heating material as the second heat 20 for heating the heating medium.

30. The solar thermal energy electric power generation method according to Claim 29, comprising measuring a quantity of the heating medium in vapor phase, absorbing the heat from the heating medium by the heating 25 material in case that the quantity of the heating medium in vapor phase is larger than a specified quantity, and heating the heating medium by the stored heat in the heating material in case that the quantity of the heating medium in vapor phase is smaller than the specified quantity. 568296AU -39

31. The solar thermal energy electric power generation method according to Claim 29, comprising separating the heating medium, having been heated by the stored heat in the heating material, into vapor phase and liquid phase by a vapor-liquid separating device, and 5 absorbing the heat from the heating medium by the heating material in case that a quantity of the heating medium in liquid phase is smaller than a specified quantity, and heating the heating medium by the stored heat in the heating material in case that the quantity of the heating medium in liquid phase is larger 10 than the specified quantity.

32. The solar thermal energy electric power generation method according to Claim 18, comprising separating the heating medium, having been heated by the heat of another different heating medium, into vapor phase and liquid phase by a vapor-liquid separating device, and 15 regulating a quantity of the heating medium in liquid phase heated by the solar heat on the basis of a quantity of the heating medium in liquid phase separated by the vapor-liquid separating device.

33. The solar thermal energy electric power generation method according to Claim 18, comprising heating the heating medium by the solar heat 20 by using a Fresnel type heat collector, a parabolic trough type heat collector, or a tower type heat collector.

34. The solar thermal energy electric power generation method according to Claim 18, wherein the heating medium is water.

35. A heating medium supplying system for supplying heating medium 25 in vapor phase that undergoes phase change between liquid phase and vapor phase, the heating medium supplying system comprising: a first heating device for heating the heating medium by solar heat that is a first heat, and a second heating device for heating the heating medium, having 30 been heated by the first heating device, by a second heat that is different from 568296AU - 40 the solar heat and thereby increasing a proportion of the heating medium in vapor phase, wherein the second heating device is configured so as to use heat, stored by another different heating medium, as the second heat for heating the heating 5 medium.

36. The heating medium supplying system according to Claim 35, wherein the second heating device comprises a first channel through which the heating medium having been heated by the first heating device flows and a second channel which is located near the first channel and through which 10 another different heating medium flows.

37. The heating medium supplying system according to Claim 36, further comprising an inflow regulating device for regulating an inflow rate of another different heating medium that flows into the second channel of the second heating device, and 15 a gas quantity measuring device for measuring a quantity of the heating medium in vapor phase, wherein the inflow regulating device regulates the inflow rate of another different heating medium that flows into the second channel on the basis of the quantity of the heating medium in vapor phase measured by the gas quantity 20 measuring device.

38. The heating medium supplying system according to Claim 36, further comprising an inflow regulating device for regulating an inflow rate of another different heating medium that flows into the second channel of the second heating device, and 25 a vapor-liquid separating device for separating the heating medium having been heated by the second heating device into vapor phase and liquid phase, wherein the inflow regulating device regulates the inflow rate of another different heating medium that flows into the second channel on the basis of a 568296AU - 41 quantity of the heating medium in liquid phase separated by the vapor-liquid separating device.

39. The heating medium supplying system according to Claim 36, further comprising an inflow regulating device for regulating an inflow rate of 5 another different heating medium that flows into the second channel of the second heating device, a supplying device for supplying the heating medium in liquid phase to the first heating device, and a vapor-liquid separating device for separating the heating 10 medium having been heated by the second heating device into vapor phase and liquid phase, wherein the heating medium supplying system is configured so that the inflow regulating device stops inflow of another different heating medium into the second channel in case that a quantity of the heating medium in liquid 15 phase which the supplying device supplies to the first heating device is nearly as large as a quantity of the heating medium in liquid phase separated by the vapor-liquid separating device.

40. The heating medium supplying system according to Claim 36, further comprising an inflow regulating device for regulating an inflow rate of 20 another different heating medium that flows into the second channel of the second heating device, and a temperature measuring device for measuring an inside temperature of the second heating device, wherein the inflow regulating device is configured so as to regulate the 25 inflow rate of another different heating medium into the second channel so that the temperature measured by the temperature measuring device is kept constant.

41. The heating medium supplying system according to Claim 36, further comprising an inflow regulating device for regulating an inflow rate of 568296AU -42 another different heating medium into the second channel of the second heating device, wherein the inflow regulating device is configured so as to warm the second heating device by making another different heating medium flow into the 5 second channel before the first heating device starts heating the heating medium.

42. The heating medium supplying system according to Claim 35, further comprising a device for discharging an exhaust gas having a high temperature, wherein 10 the exhaust gas is used as another different heating medium.

43. The heating medium supplying system according to Claim 42, wherein the device for discharging the exhaust gas having the high temperature is an electric power generating device.

44. The heating medium supplying system according to Claim 42, 15 further comprising an exhaust gas distributing device for distributing the exhaust gas into the second heating device and an exhaust heat recovery boiler device.

45. The heating medium supplying system according to Claim 44, wherein the exhaust heat recovery boiler device superheats the heating medium having been heated by the second heating device. 20

46. The heating medium supplying system according to any one of Claims 35 through 45, wherein the second heating device comprises a heating material for absorbing and storing the heat from the heating medium and is configured so as to use the stored heat in the heating material as the second heat for heating the heating medium. 25

47. The heating medium supplying system according to Claim 46, further comprising a gas quantity measuring device for measuring a quantity of the heating medium in vapor phase, wherein the second heating device is configured so as to absorb the heat from the heating medium by the heating material in case that the quantity of the 568296AU -43 heating medium in vapor phase measured by the gas quantity measuring device is larger than a specified quantity, and so as to heat the heating medium by the stored heat in the heating material in case that the quantity of the heating medium in vapor phase 5 measured by the gas quantity measuring device is smaller than the specified quantity.

48. The heating medium supplying system according to Claim 46, further comprising a vapor-liquid separating device for separating the heating medium, having been heated by the second heating device, into vapor phase 10 and liquid phase, wherein the second heating device is configured so as to absorb the heat from the heating medium by the heating material in case that a quantity of the heating medium in liquid phase separated by the vapor-liquid separating device is smaller than a specified quantity, and 15 so as to heat the heating medium by the stored heat in the heating material in case that the quantity of the heating medium in liquid phase separated by the vapor-liquid separating device is larger than the specified quantity.

49. The heating medium supplying system according to Claim 35, 20 further comprising a supplying device for supplying the heating medium in liquid phase to the first heating device, and a vapor-liquid separating device for separating the heating medium, having been heated by the second heating device, into vapor phase and liquid phase, wherein 25 a quantity of the heating medium in liquid phase the supplying device supplies to the first heating device is regulated on the basis of a quantity of the heating medium in liquid phase separated by the vapor-liquid separating device.

50. The heating medium supplying system according to Claim 35, 30 wherein the first heating device comprises a Fresnel type heat collector, a 568296AU -44 parabolic trough type heat collector, or a tower type heat collector, for heating the heating medium by the solar heat.

51. The heating medium supplying system according to Claim 35, wherein the heating medium is water. 5

52. A heating medium heating system for heating a heating medium that undergoes phase change between liquid phase and vapor phase, the heating medium heating system configured: so as to receive the heating medium heated by solar heat that is a first heat, 10 so as to increase a proportion of the heating medium in vapor phase of the received heating medium by heating by a second heat that is different from the solar heat, so as to receive another different heating medium from outside of the heating medium heating system, and 15 so as to use heat, stored by another different heating medium, as the second heat for heating the heating medium.

53. The heating medium heating system according to Claim 52, further comprising a first channel through which the heating medium having been heated by the solar heat flows, and 20 a second channel which is located near the first channel and through which another different heating medium flows.

54. The heating medium heating system according to Claim 53, further comprising an inflow regulating device for regulating an inflow rate of another different heating medium that flows into the second channel, and 25 a gas quantity measuring device for measuring a quantity of the heating medium in vapor phase, wherein the inflow regulating device regulates the inflow rate of another different heating medium that flows into the second channel on the basis of the quantity of the heating medium in vapor phase measured by the gas quantity 30 measuring device. 568296AU -45-.

55. The heating medium heating system according to Claim 53, further comprising an inflow regulating device for regulating an inflow rate of another different heating medium that flows into the second channel, and a vapor-liquid separating device for separating the heating 5 medium, having been heated by the heating medium heating system, into vapor phase and liquid phase, wherein the inflow regulating device regulates the inflow rate of another different heating medium that flows into the second channel on the basis of a quantity of the heating medium in liquid phase separated by the vapor-liquid 10 separating device.

56. The heating medium heating system according to Claim 53, further comprising an inflow regulating device for regulating an inflow rate of another different heating medium that flows into the second channel, and a vapor-liquid separating device for separating the heating 15 medium, having been heated by the heating medium heating system, into vapor phase and liquid phase, wherein the heating medium heating system is configured so that the inflow regulating device stops inflow of another different heating medium into the second channel in case that a quantity of the heating medium in liquid 20 phase before being heated by the solar heat is nearly as large as a quantity of the heating medium in liquid phase separated by the vapor-liquid separating device.

57. The heating medium heating system according to Claim 53, further comprising an inflow regulating device for regulating an inflow rate of 25 another different heating medium that flows into the second channel, and a temperature measuring device for measuring an inside temperature of the heating medium heating device, wherein the inflow regulating device is configured so as to regulate the inflow rate of another different heating medium that flows into the second 568296AU -46 channel so that the temperature measured by the temperature measuring device is kept constant.

58. The heating medium heating system according to Claim 53, further comprising an inflow regulating device for regulating an inflow rate of 5 another different heating medium that flows into the second channel, wherein the inflow regulating device is configured so as to warm the heating medium heating system by making another different heating medium flow into the second channel before starting of receiving of the heating medium heated by the solar heat. 10

59. The heating medium heating system according to Claim 52, configured so as to receive an exhaust gas that is another different heating medium.

60. The heating medium heating system according to any one of Claims 52 through 59, further comprising a heating material for absorbing and 15 storing heat from the heating medium, wherein the heating medium heating system is configured so as to use the stored heat in the heating material as the second heat for heating the heating medium.

61. The heating medium heating system according to Claim 60, 20 further comprising a gas quantity measuring device for measuring a quantity of the heating medium in vapor phase, wherein the heating medium heating system is configured so as to absorb the heat from the heating medium by the heating material in case that the quantity of the heating medium in vapor phase measured by the gas quantity 25 measuring device is larger than a specified quantity, and so as to heat the heating medium by the stored heat in the heating material in case that the quantity of the heating medium in vapor phase measured by the gas quantity measuring device is smaller than the specified quantity. 568296AU -47

62. The heating medium heating system according to Claim 60, further comprising a vapor-liquid separating device for separating the heating medium, having been heated by the heating medium heating system, into vapor phase and liquid phase, wherein 5 the heating medium heating system is configured so as to absorb the heat from the heating medium by the heating material in case that a quantity of the heating medium in liquid phase separated by the vapor-liquid separating device is smaller than a specified quantity, and so as to heat the heating medium by the stored heat in the heating 10 material in case that the quantity of the heating medium in liquid phase separated by the vapor-liquid separating device is larger than the specified quantity.

63. The heating medium heating system according to Claim 52, wherein the heating medium is water. 15 568 296AU