WO2020071580A1 - Cogeneration thermoelectric power generation system using solar collector - Google Patents

Abstract

A cogeneration thermoelectric power generation system, according to one embodiment, may comprise: a solar collector; a thermoelectric power generation unit; a power storage unit; a cold water line; a hot water line; a hot water storage unit; a circulation line unit; a three-way valve unit; an index calculation unit for calculating a power needs index and a hot water needs index; a plan selection unit for selecting a control plan in accordance with the respective numerical values of the power needs index and the hot water needs index; and a control unit for controlling the circulation path and flow of a heat circulation medium by controlling the three-way valve unit according to the control plan.

Description

Combined heat and power generation system using solar collector

The following embodiment relates to a cogeneration thermoelectric power generation system using a solar heat collector.

Recently, as the necessity of renewable energy has emerged, interest in cogeneration using solar heat has increased. Cogeneration is a power generation method that produces electricity using heat and produces hot water using the remaining heat. When using this combined heat and power generation, thermal energy can be efficiently utilized because power and hot water can be simultaneously produced using solar heat. Since the heat energy that can be obtained from solar heat is limited, it is important to properly distribute heat energy to electric power production and hot water production. Meanwhile, interest in an energy prosumer that uses and produces power or hot water in a private household and sells the remaining power or hot water to surrounding areas is increasing. From a prosumer's point of view, it is important to produce electricity and hot water in appropriate proportions in order to make the most profit by selling electric power or hot water to surrounding areas. Accordingly, there is a need for a cogeneration system that has an efficient structure capable of producing electric power or hot water by making maximum use of solar heat, and can appropriately adjust the ratio of electric power or hot water produced by cogeneration.

The above-described background art is possessed or acquired by the inventor during the derivation process of the present invention, and is not necessarily a known technology disclosed to the general public prior to the filing of the present invention.

An object of one embodiment is to provide a combined heat and power thermoelectric power generation system for generating electric power and hot water using a solar heat collector.

The purpose of one embodiment is to provide a combined heat and power thermoelectric power generation system that calculates the power required index and the hot water required index and selects an appropriate control plan to efficiently control the production rate of power and hot water.

The purpose of one embodiment is to provide a cogeneration thermoelectric power generation system capable of selling the generated power and hot water to a buyer.

A combined heat and power thermoelectric power generation system according to an embodiment includes a solar heat collector for condensing solar radiation radiated from the sun and heating a heat circulation medium; It includes a thermoelectric element, a hot water tank in contact with the high temperature surface of the thermoelectric element to accommodate the thermocirculating medium and a low temperature water tank in contact with the low temperature surface of the thermoelectric element to receive cold water, the temperature of the thermocycling medium and the temperature of the cold water A thermoelectric power generation unit that produces electric power by a difference; A power storage unit that stores power generated by the thermoelectric power generation unit; A cold water line supplying the cold water to the low temperature water tank; A hot water line connected to the low temperature water tank and discharging hot water generated from the low temperature water tank; A hot water storage unit receiving and storing the hot water from the hot water line, and having a heat exchanger disposed therein; A first circulation line for supplying the heat circulation medium heated from the solar heat collector to the hot water tank, a second circulation line for supplying the heat circulation medium discharged from the high temperature water tank to the heat exchanger, and the discharge from the heat exchanger A third circulation line for supplying a thermal circulation medium to the solar heat collector, a fourth circulation line connecting the second circulation line and the third circulation line, and a fifth connecting the first circulation line and the second circulation line A circulation line portion including a circulation line; The first three-way valve and the second three-way valve, each of which is provided at a branch point where the fourth circulation line is connected to the second circulation line and the third circulation line, and the fifth circulation line are the first circulation line and the second circulation line. A three-way valve part including a third three-way valve and a fourth three-way valve, which are respectively provided at a branch point connected to the three-way valve; The remaining amount of power stored in the power storage unit, power consumption, power demand, and the unit price of the power are multiplied and summed to calculate the power required index, and the remaining amount and temperature of hot water stored in the hot water storage unit, temperature, hot water usage, hot water An exponential calculating unit for multiplying and summing the demand amount and the unit price of the hot water to calculate the required hot water index; A plan selector for selecting a control plan according to the values of the power required index and the hot water required index; And a control unit controlling the three-way valve unit according to the control plan to adjust the circulation path and flow rate of the thermal circulation medium.

The plan selector selects a hot water intensive production plan when the power required index is less than a first set value and the hot water required index is greater than or equal to a second set value, and the power required index is greater than or equal to the first set value and the hot water If the required index is less than the second set value, a power intensive production plan is selected, and if the required power index is greater than or equal to the first set value and the hot water required index is greater than or equal to the second set value, a mixed production plan can be selected. have.

When the hot water concentration production plan is selected, the control unit blocks the inflow of the heat circulation medium into the hot water tank and opens the fifth circulation line, and when the power concentration production plan is selected, the heat exchanger When the heat circulation medium is blocked, the fourth circulation line is opened, and the mixed production plan is selected, the flow rate of the heat circulation medium flowing into each of the hot water tank and the heat exchanger can be adjusted.

The control unit, when the mixed production plan is selected, the flow rate of the heat-circulating medium flowing into the hot water tank and the heat exchanger, respectively, is proportional to the size of the power required index and the hot water required index, the opening degree of the three-way valve unit Can be adjusted.

The plan selector selects a power saving plan when the power required index is less than the first set value and the hot water required index is less than the second set value, and the control unit selects the power save plan when the power save plan is selected, and the hot water tank and heat exchange. It is possible to block the inflow of the heat circulation medium into the air passage and open the fourth circulation line and the fifth circulation line.

The index calculation unit calculates the power consumption in consideration of at least one of the previous year's power consumption, the previous day's power consumption, season, time, weather, temperature, and day of the week, and the previous year's hot water usage, the previous day's hot water usage, season, time, weather, temperature , It is possible to calculate the usage of hot water in consideration of at least one of the days of the week.

The power stored in the power storage unit and the hot water stored in the hot water storage unit may be sold to a buyer.

Cogeneration thermoelectric power generation system according to an embodiment includes a solar heat collector for condensing solar radiation radiated from the sun to heat a thermal circulation medium; It includes a thermoelectric element, a hot water tank in contact with the high temperature surface of the thermoelectric element to accommodate the thermocirculating medium and a low temperature water tank in contact with the low temperature surface of the thermoelectric element to receive cold water, the temperature of the thermocycling medium and the temperature of the cold water A thermoelectric power generation unit that produces electric power by a difference; A power storage unit that stores power generated by the thermoelectric power generation unit; An auxiliary hot water storage unit receiving water from a water supply; A hot water circulation line that supplies water stored in the auxiliary hot water storage unit to the low temperature water tank and supplies hot water generated from the low temperature water tank to the auxiliary hot water storage unit; A hot water storage unit receiving and storing hot water from the auxiliary hot water storage unit, and a heat exchanger disposed therein; A first circulation line for supplying the heat circulation medium heated from the solar heat collector to the hot water tank, a second circulation line for supplying the heat circulation medium discharged from the high temperature water tank to the heat exchanger, and the discharge from the heat exchanger A third circulation line for supplying a thermal circulation medium to the solar heat collector, a fourth circulation line connecting the second circulation line and the third circulation line, and a fifth connecting the first circulation line and the second circulation line A circulation line portion including a circulation line; The first three-way valve and the second three-way valve, each of which is provided at a branch point where the fourth circulation line is connected to the second circulation line and the third circulation line, and the fifth circulation line are the first circulation line and the second circulation line. A three-way valve part including a third three-way valve and a fourth three-way valve, which are respectively provided at a branch point connected to the third branch valve; A prosumer hot water storage unit that receives hot water from the hot water storage unit and stores hot water for sale to a buyer; The heating water circulates, and the heating water is supplied with heat through a heating heat exchanger disposed inside the hot water storage unit. The remaining amount of power stored in the power storage unit, power consumption, power demand, and the unit price of the power are multiplied and summed to calculate the power required index, and the remaining amount and temperature of hot water stored in the hot water storage unit, temperature, hot water usage, hot water An exponential calculating unit for multiplying and summing the demand amount and the unit price of the hot water to calculate the required hot water index; A plan selector for selecting a control plan according to the values of the power required index and the hot water required index; And a control unit controlling the three-way valve unit according to the control plan to adjust the circulation path and flow rate of the thermal circulation medium.

The cogeneration thermoelectric power generation system according to an embodiment may generate power and hot water using solar heat.

The cogeneration thermoelectric power generation system according to an embodiment may calculate the power required index and the hot water required index, and select an appropriate control plan to efficiently control the power and hot water production ratio.

The cogeneration thermoelectric power generation system according to an embodiment may make profits by selling the generated power and hot water to a buyer.

The effects of the cogeneration thermoelectric power generation system according to an embodiment are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

The following drawings attached to this specification are intended to illustrate one preferred embodiment of the present invention and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, so the present invention is limited to those described in those drawings. It should not be interpreted as limited.

1 is a schematic diagram schematically showing a cogeneration thermoelectric power generation system according to an embodiment.

2 is a block diagram of an index calculation unit, a plan selection unit, a control unit, and a three-way valve unit according to an embodiment.

3 is a graph showing a control plan according to a numerical section of the power required index and the hot water required index.

4 is a schematic diagram schematically showing a cogeneration thermoelectric power generation system according to an embodiment.

Hereinafter, embodiments will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the embodiments, when it is determined that detailed descriptions of related well-known configurations or functions interfere with understanding of the embodiments, detailed descriptions thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to the other component, but another component between each component It should be understood that may be "connected", "coupled" or "connected".

Components included in any one embodiment and components including a common function will be described using the same name in other embodiments. Unless there is an objection to the contrary, the description described in any one embodiment may be applied to other embodiments, and a detailed description will be omitted in the overlapped range.

1 is a schematic diagram schematically showing a cogeneration thermoelectric power generation system according to an embodiment. 2 is a block diagram of an index calculation unit, a plan selection unit, a control unit, and a three-way valve unit according to an embodiment.

1 and 2, the cogeneration thermoelectric power generation system 1 according to an embodiment may produce power and hot water using solar heat. Electric power and hot water produced through the cogeneration thermoelectric power generation system 1 may be stored in the power storage unit 300 and the hot water storage unit 500, respectively. The user can use the stored power and hot water. In addition, the user can sell the stored power and hot water to the buyer. That is, the cogeneration thermoelectric power generation system 1 may be a prosumer type system. Electric power and hot water may be sold through a power sales line and a hot water sales line (not shown), respectively.

The cogeneration thermoelectric power generation system 1 includes a solar heat collector 100, a thermoelectric power generation unit 200, a power storage unit 300, a cold water line 410, a hot water line 420, a hot water storage unit 500, and a circulation line unit. (600), three-way valve unit 700, an index calculation unit 810, a plan selection unit 820 and a control unit 830 may be included.

The solar heat collector 100 may collect heat rays radiated from the sun to heat the heat circulation medium accommodated therein. The heated thermal circulation medium may be transferred to the high temperature water tank 220 and / or the heat exchanger 510 of the thermoelectric power generation unit 200.

The thermoelectric power generation unit 200 is in contact with the heat circulation medium and cold water, and may generate electric power by the difference between the temperature of the heat circulation medium and the temperature of the cold water. The thermoelectric power generation unit 200 may include a thermoelectric element 210, a high temperature water tank 220 and a low temperature water tank 230.

The thermoelectric element 210 is a device that generates electric power through the Seebeck effect. A plurality of thermoelectric elements 210 may be provided. The thermoelectric element 210 may include a high temperature surface and a low temperature surface. The thermoelectric element 210 may generate electric power according to a temperature difference between a high temperature surface and a low temperature surface.

The high temperature water tank 220 may contact the high temperature surface of the thermoelectric element 210. The high temperature water tank 220 may receive and receive a high temperature thermal circulation medium through the first circulation line 610 to maintain a high temperature surface of the thermoelectric element 210 in a high temperature state.

The low temperature water tank 230 may contact the low temperature surface of the thermoelectric element 210. The low temperature water tank 230 may receive and receive cold water through the cold water line 410 to maintain the low temperature surface of the thermoelectric element 210 in a low temperature state. The cold water accommodated in the low temperature water tank 230 may receive the heat discharged from the low temperature surface to increase the temperature. In this process, hot water may be generated in the low temperature water tank 230.

The power storage unit 300 may store power generated by the thermoelectric power generation unit 200. The power storage unit 300 may be, for example, a battery or an Energy Storage System (ESS).

The cold water line 410 may be connected to the low temperature water tank 230 and supply cold water to the low temperature water tank 230. The hot water line 420 may be connected to the low temperature water tank 230 and discharge hot water generated from the low temperature water tank 230.

The hot water storage unit 500 may receive and store hot water from the hot water line 420. For example, the hot water storage unit 500 may be a hot water tank. A heat exchanger 510 may be disposed inside the hot water storage unit 500. A heat circulation medium may be supplied to the heat exchanger 510. The thermal circulation medium may transfer heat to the hot water stored in the hot water storage unit 500 while passing through the heat exchanger 510. Accordingly, the hot water stored in the hot water storage unit 500 may be heated. The user may use hot water stored in the hot water storage unit 500.

The thermal circulation medium may be transferred through the circulation line part 600. The circulation line part 600 may include a first circulation line 610, a second circulation line 620, a third circulation line 630, a fourth circulation line 640 and a fifth circulation line 650. have.

The first circulation line 610 may supply the heat circulation medium heated from the solar collector 100 to the hot water tank 220. The second circulation line 620 may supply the heat circulation medium discharged from the hot water tank 220 to the heat exchanger 510. The third circulation line 630 may supply the heat circulation medium discharged from the heat exchanger 510 to the solar heat collector 100. The fourth circulation line 640 may connect the second circulation line 620 and the third circulation line 630. The fifth circulation line 650 may connect the first circulation line 610 and the second circulation line 620.

A three-way valve unit 700 may be provided at a point where the circulation line unit 600 is branched. Through the opening and closing direction control of the three-way valve unit 700, it is possible to adjust the circulation path of the thermal circulation medium. Through the control of the opening degree of the three-way valve unit 700, it is possible to control the flow rate of the thermal circulation medium. The three-way valve unit 700 may include a first three-way valve 710, a second three-way valve 720, a third three-way valve 730, and a fourth three-way valve 740.

The first three-way valve 710 and the second three-way valve 720 may be respectively provided at a branch point where the fourth circulation line 640 is connected to the second circulation line 620 and the third circulation line 630. The third three-way valve 730 and the fourth three-way valve 740 may be provided at branch points where the fifth circulation line 650 is connected to the first circulation line 610 and the second circulation line 620, respectively.

The thermal circulation medium may circulate along the circulation line part 600 and perform heat exchange in the high temperature water tank 220 or the heat exchanger 510. Depending on the opening and closing direction of the three-way valve unit 700, the thermal circulation medium may circulate in various circulation paths. For example, the heat circulation medium includes a solar heat collector 100-a first circulation line 610-a hot water tank 220-a second circulation line 620-a heat exchanger 510-a third circulation line 630 -It can circulate in the order of the solar collector 100. For convenience of description, the path is referred to as a first circular path. When the thermal cycling medium circulates in the first circulation path, the thermal cycling medium supplies heat to the hot surface of the thermoelectric element 210 while passing through the high temperature water tank 220 and the remaining heat while passing through the heat exchanger 510. The hot water stored in the hot water storage unit 500 may be heated. Therefore, when the thermal circulation medium circulates in the first circulation path, power and hot water can be simultaneously produced. Meanwhile, the thermal circulation medium includes a solar heat collector 100-a first circulation line 610-a hot water tank 220-a second circulation line 620-a fourth circulation line 640-a third circulation line 630 -It can circulate in the order of the solar collector 100. For convenience of description, the path is referred to as a second circulation path. When the heat circulation medium circulates in the second circulation path, since the heat circulation medium passes only the high-temperature water tank 220 and does not pass through the heat exchanger 510, heat energy can be intensively used for power generation. In addition, the heat circulation medium includes a solar heat collector 100-a first circulation line 610-a fifth circulation line 650-a second circulation line 620-a heat exchanger 510-a third circulation line 630 -It can circulate in the order of the solar collector 100. For convenience of description, the path is referred to as a third circular path. When the heat circulation medium circulates through the third circulation path, since the heat circulation medium passes only the heat exchanger 510 and does not pass through the high temperature water tank 220, heat energy can be intensively used for hot water production.

Since the heat energy that can be obtained through the solar collector 100 is limited, it is necessary to properly distribute the limited heat energy to produce power and hot water. In addition, since the user's usage, the buyer's demand, and the unit price vary depending on the season, time, weather, temperature, and day of the week, in order to achieve maximum efficiency with limited heat energy, the optimal production ratio of power and hot water is calculated to obtain the optimal ratio. It can be important to produce power and hot water.

The index calculation unit 810 may calculate the power required index and the hot water required index. The power requirement index can be a measure of the need for power generation. The index calculation unit 810 may calculate a power required index by multiplying and adding weights to the remaining amount of power stored in the power storage unit 300, power consumption, power demand, and unit price of power, respectively. The power consumption means the power consumption of the user, and the power consumption of the previous day can be used as a value. Alternatively, the index calculation unit 810 may calculate a power usage value in consideration of at least one of a user's previous year's power usage, a previous day's power usage, season, time, weather, temperature, and day of the week. The electric power demand amount means the electric power demand amount of the buyer in the surrounding area, and the unit price of electric power may mean the selling price of electric power. The weight multiplied by each element may be set differently according to the specific gravity of each element. Also, the weight may be a variable weight that changes in real time in consideration of at least one of season, time, weather, temperature, and day of the week. The weight may be negative. For example, as the remaining amount of power stored in the power storage unit 300 increases, the need for power generation decreases, so the weight multiplied by the remaining amount of power may be negative. The greater the user's power usage, the higher the need for power generation, so the weight multiplied by the power usage may be positive. In addition, the more the power demand of the buyer, the higher the unit cost of power, the higher the need for power generation, so the weight multiplied by the power demand and the unit cost of power may be positive.

The hot water need index may be a number indicating the need for hot water production. The hot water required index can also be calculated in the same way as the power required index. The exponent calculating unit 810 may calculate a power required index by multiplying and summing the residual amount and temperature of the hot water stored in the hot water storage unit 500, the amount of hot water used, the amount of hot water demand, and the unit price of the hot water, respectively. The amount of hot water used means the amount of hot water used by the user, and the amount of hot water used the day before can be used as a value. Alternatively, the index calculation unit 810 may calculate the hot water usage value in consideration of at least one of the user's previous year's hot water usage, the previous day's hot water usage, season, time, weather, temperature, and day of the week. The demand for hot water means the amount of hot water demand of the buyer in the surrounding area, and the unit price of hot water may mean the selling price of hot water. The weight multiplied by each element may be set differently according to the specific gravity of each element. Also, the weight may be a variable weight that changes in real time in consideration of at least one of season, time, weather, temperature, and day of the week. The weight may be negative. For example, the more the residual amount of hot water stored in the hot water storage 500 and the higher the temperature of the stored hot water, the lower the need for hot water production, so the weight multiplied by the residual amount and temperature of the hot water may be negative. The amount of hot water used, the amount of hot water demand, and the unit price of hot water may be multiplied by a positive weight as in the case of electric power.

The plan selector 820 may select a suitable control plan according to the values of the power required index and the hot water required index calculated by the index calculating unit 810. The plan selector 820 may compare the values of the power required index and the hot water required index with the first set value and the second set value, respectively. The plan selector 820 may select a corresponding control plan according to whether the values of the power required index and the hot water required index are greater than or less than the first set value and the second set value, respectively. The first set value and the second set value may be preset values. Alternatively, the first set value and the second set value may be changed in real time in consideration of at least one of season, time, weather, temperature, and day of the week. Details will be described later.

The control unit 830 may control the three-way valve unit 700 according to the selected control plan. The control unit 830 controls the opening / closing direction of the three-way valve unit 700 to adjust the circulation path such that the thermal circulation medium is circulated along any one of the first circulation path, the second circulation path, or the third circulation path. You can. In addition, the control unit 830 may control the opening degree of the three-way valve unit 700 to control the flow rate of the thermal circulation medium circulating along the circulation line unit 600.

3 is a graph showing a control plan according to a numerical section of a power required index and a hot water required index.

3, the horizontal axis is the power required index and the vertical axis is the hot water required index. The plan selector 820 may select different control plans according to areas where coordinates according to values of the power required index and the hot water required index are located.

Referring to FIG. 3, the plan selector 820 may select a hot water intensive production plan when the power required index is less than the first set value and the hot water required index is greater than or equal to the second set value. The hot water intensive production plan may mean a plan that intensively uses thermal energy for hot water production. When the hot water intensive production plan is selected, the control unit 830 controls the opening and closing directions of the third three-way valve 730 and the fourth three-way valve 740 to block the inflow of heat circulation medium into the high temperature water tank 220 and remove 5 The circulation line 650 may be opened. That is, the control unit 830 may control the thermal circulation medium to circulate only along the third circulation path. Therefore, in the hot water intensive production plan, heat energy can be used only for hot water production.

The plan selector 820 may select a power intensive production plan when the power required index is greater than or equal to the first set value and the hot water required index is less than the second set value. The power intensive production plan may mean a plan that intensively uses thermal energy for power generation. When the power intensive production plan is selected, the control unit 830 controls the opening and closing directions of the first three-way valve 710 and the second three-way valve 720 to block the inflow of heat circulation medium into the heat exchanger 510 and to 4 The circulation line 640 may be opened. That is, the control unit 830 may control the thermal circulation medium to circulate only along the second circulation path. In the power intensive production plan, the main purpose is to generate power, but cold water passing through the low temperature water tank 230 may acquire heat in the power production process using thermoelectric power generation and flow into the hot water storage unit 500. That is, in the electric power intensive production plan, in addition to the intensive electric power production, hot water production may be additionally possible.

The plan selector 820 may select a mixed production plan when the power required index is greater than or equal to the first set value and the hot water required index is greater than or equal to the second set value. The mixed production plan may mean a plan that simultaneously produces electric power and hot water for thermal energy, and controls the production rate of electric power and hot water. When a mixed production plan is selected, the control unit 830 may control the opening degree of the three-way valve unit 700 to control the flow rate of the heat circulation medium flowing into the hot water tank 220 and the heat exchanger 510, respectively. For example, the control unit 830 is a three-way valve unit 700, so that the flow rate of the heat circulation medium flowing into the hot water tank 220 and the heat exchanger 510 is proportional to the size of the power required index and the hot water required index, respectively. ) Can be adjusted. According to such a control, in a mixed production plan, heat energy can be appropriately distributed in proportion to the need for electric power production and hot water production.

The plan selector 820 may select a power saving plan when the power required index is less than the first set value and the hot water required index is less than the second set value. A power saving plan may mean a plan that stores thermal energy. When the power saving plan is selected, the control unit 830 controls the opening and closing direction of the three-way valve unit 700 to block the inflow of heat circulating medium into the high temperature water tank 220 and the heat exchanger 510 and the fourth circulation line 640 ) And the fifth circulation line 650 may be opened. Alternatively, the control unit 830 may close all three-way valve units 700 to stop the circulation of the thermal circulation medium. According to such a control, since heat energy can be stored in a heat circulation medium, a large amount of heat energy can be used when the control plan is changed and heat energy is needed.

On the other hand, season, time, weather, temperature, day, at least one of the installation latitude, installation angle and installation direction of the solar heat collector 100, and considering the control plan selected by the plan selector 820, power generation and hot water production It may further include a production forecasting unit (not shown) for predicting. The predicted power production and hot water production can be displayed on the display. The user may check the predicted power production amount and the hot water production amount, adjust the power consumption or hot water usage, or adjust the power sales amount or the hot water sales amount.

4 is a schematic diagram schematically showing a cogeneration thermoelectric power generation system according to an embodiment.

Referring to FIG. 4, the combined heat and power thermoelectric power generation system 2 according to an embodiment includes a solar heat collector 100, a thermoelectric power generation unit 200, a power storage unit 300, an auxiliary hot water storage unit 430, and a hot water circulation line. 440, hot water storage unit 500, circulation line unit 600, three-way valve unit 700, index calculation unit, plan selection unit, control unit, auxiliary heat storage unit 910, prosumer hot water storage unit 920 and A heating water circulation unit 930 may be included.

Solar collector 100, thermoelectric power generation unit 200, power storage unit 300, hot water storage unit 500, circulation line unit 600, three-way valve unit 700, index calculation unit, plan selection unit and control unit May be the same configuration as described above. Therefore, redundant description of the above structures will be omitted.

The auxiliary hot water storage unit 430 may receive water from the water supply and store water. The water stored in the auxiliary hot water storage unit 430 may be circulated through the hot water circulation line 440. The hot water circulation line 440 may supply water stored in the auxiliary hot water storage unit 430 to the low temperature water tank 230. The hot water circulation line 440 may supply hot water generated from the low temperature water tank 230 to the auxiliary hot water storage unit 430 again. According to this configuration, the water stored in the auxiliary hot water storage unit 430 is supplied with heat while passing through the low temperature water tank 230 when circulating the hot water circulation line 440, and accordingly the temperature may be increased. . Therefore, the water stored in the auxiliary hot water storage unit 430 may gradually increase in temperature and become hot water. The hot water stored in the auxiliary hot water storage unit 430 may be supplied to the hot water storage unit 500. On the other hand, by supplying cold water from the water supply to the auxiliary hot water storage unit 430, it is possible to control the temperature of the water stored in the auxiliary hot water storage unit 430. Therefore, the temperature of the water supplied to the low-temperature water tank 230 can be adjusted within a certain range, and accordingly, electric power can be produced in the thermoelectric power generation unit 200.

The auxiliary heat storage unit 910 may be disposed on the first circulation line 610. The heat circulation medium flowing through the first circulation line 610 may supply heat to the auxiliary heat storage unit 910 while passing through the auxiliary heat storage unit 910. The auxiliary heat storage unit 910 may receive heat from a heat circulation medium and store heat.

The prosumer hot water storage unit 920 may receive hot water from the hot water storage unit 500. The prosumer hot water storage unit 920 may store hot water for sale to a buyer. The hot water stored in the prosumer hot water storage unit 920 may be supplied to a buyer.

The heating water circulation unit 930 may be a line through which heating water circulates. The heating water circulating through the heating water circulation unit 930 may be supplied with heat through a heating heat exchanger disposed inside the hot water storage unit 500. The heating water circulation unit 930 may be connected to the heating medium (H). The heating medium H may include a fan coil unit (FCU) or an ondol. The heating water circulation unit 930 may perform heating using the heat of the hot water stored in the hot water storage unit 500.

Meanwhile, a boiler B may be connected to the hot water storage unit 500 and the heating water circulation unit 930. The hot water generated in the boiler B may be supplied to the hot water storage unit 500 and the heating water circulation unit 930.

As described above, although the embodiments have been described by the limited drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components such as the structure, device, etc. described may be combined or combined in a different form from the described method, or may be applied to other components or equivalents. Even if replaced or substituted by, appropriate results can be achieved.

Claims (8)

A solar heat collector for condensing solar radiation radiating from the sun to heat a thermal circulation medium; It includes a thermoelectric element, a hot water tank in contact with the high temperature surface of the thermoelectric element to accommodate the thermocirculating medium and a low temperature water tank in contact with the low temperature surface of the thermoelectric element to receive cold water, the temperature of the thermocycling medium and the temperature of the cold water A thermoelectric power generation unit that produces electric power by a difference; A power storage unit that stores power generated by the thermoelectric power generation unit; A cold water line supplying the cold water to the low temperature water tank; A hot water line connected to the low temperature water tank and discharging hot water generated from the low temperature water tank; A hot water storage unit receiving and storing the hot water from the hot water line, and having a heat exchanger disposed therein; A first circulation line for supplying the heat circulation medium heated from the solar heat collector to the hot water tank, a second circulation line for supplying the heat circulation medium discharged from the high temperature water tank to the heat exchanger, and the discharge from the heat exchanger A third circulation line for supplying a thermal circulation medium to the solar heat collector, a fourth circulation line connecting the second circulation line and the third circulation line, and a fifth connecting the first circulation line and the second circulation line A circulation line portion including a circulation line; The first three-way valve and the second three-way valve, each of which is provided at a branch point where the fourth circulation line is connected to the second circulation line and the third circulation line, and the fifth circulation line are the first circulation line and the second circulation line. A three-way valve part including a third three-way valve and a fourth three-way valve, which are respectively provided at a branch point connected to the three-way valve; The remaining amount of power stored in the power storage unit, power consumption, power demand, and the unit price of the power are multiplied and summed to calculate the power required index, and the remaining amount and temperature of hot water stored in the hot water storage unit, temperature, hot water usage, hot water An exponential calculating unit for multiplying and summing the demand amount and the unit price of the hot water to calculate the required hot water index; A plan selector for selecting a control plan according to the values of the power required index and the hot water required index; And And a control unit for controlling the circulation path and flow rate of the thermal circulation medium by controlling the three-way valve unit according to the control plan. According to claim 1, The plan selector, When the power required index is less than the first set value and the hot water required index is greater than or equal to the second set value, a hot water intensive production plan is selected, When the power required index is greater than the first set value and the hot water required index is less than the second set value, a power intensive production plan is selected, A cogeneration thermoelectric power generation system for selecting a mixed production plan when the power required index is greater than the first set value and the hot water required index is greater than or equal to the second set value. According to claim 2, The control unit, When the hot water intensive production plan is selected, the inflow of the thermal circulation medium into the hot water tank is blocked and the fifth circulation line is opened, When the power intensive production plan is selected, the inflow of the heat circulation medium to the heat exchanger is blocked and the fourth circulation line is opened, When the mixed production plan is selected, a combined heat and thermoelectric power generation system that controls the flow rate of the heat circulation medium flowing into the hot water tank and the heat exchanger, respectively. According to claim 3, The control unit, When the above mixed production plan is selected, The combined heat and power thermoelectric power generation system for controlling the opening degree of the three-way valve unit so that the flow rate of the heat circulation medium flowing into the hot water tank and the heat exchanger is proportional to the size of the power required index and the hot water required index, respectively. According to claim 4, The plan selector selects a power saving plan when the power required index is less than the first set value and the hot water required index is less than the second set value, When the power saving plan is selected, the control unit blocks the inflow of the thermal circulation medium to the hot water tank and the heat exchanger and opens the fourth circulation line and the fifth circulation line. The method of claim 5, The index calculation unit, Calculate power consumption by considering at least one of the previous year's power consumption, the previous day's power consumption, season, time, weather, temperature, and day of the week, A combined heat and power thermoelectric power generation system that calculates the use of hot water in consideration of at least one of the previous year's hot water usage, the previous day's hot water usage, season, time, weather, temperature, and day of the week. The method of claim 5, A cogeneration thermoelectric power generation system capable of selling power stored in the power storage unit and hot water stored in the hot water storage unit to a buyer. A solar heat collector for condensing solar radiation radiating from the sun to heat a thermal circulation medium; It includes a thermoelectric element, a hot water tank in contact with the high temperature surface of the thermoelectric element to accommodate the thermocirculating medium and a low temperature water tank in contact with the low temperature surface of the thermoelectric element to receive cold water, the temperature of the thermocycling medium and the temperature of the cold water A thermoelectric power generation unit that produces electric power by a difference; A power storage unit that stores power generated by the thermoelectric power generation unit; An auxiliary hot water storage unit receiving water from a water supply; A hot water circulation line that supplies water stored in the auxiliary hot water storage unit to the low temperature water tank and supplies hot water generated from the low temperature water tank to the auxiliary hot water storage unit; A hot water storage unit receiving and storing hot water from the auxiliary hot water storage unit, and a heat exchanger disposed therein; A first circulation line for supplying the heat circulation medium heated from the solar heat collector to the hot water tank, a second circulation line for supplying the heat circulation medium discharged from the high temperature water tank to the heat exchanger, and the discharge from the heat exchanger A third circulation line for supplying a thermal circulation medium to the solar heat collector, a fourth circulation line connecting the second circulation line and the third circulation line, and a fifth connecting the first circulation line and the second circulation line A circulation line portion including a circulation line; The first three-way valve and the second three-way valve, each of which is provided at a branch point where the fourth circulation line is connected to the second circulation line and the third circulation line, and the fifth circulation line are the first circulation line and the second circulation line. A three-way valve part including a third three-way valve and a fourth three-way valve, which are respectively provided at a branch point connected to the third branch valve; A prosumer hot water storage unit that receives hot water from the hot water storage unit and stores hot water for sale to a buyer; The heating water circulates, and the heating water is supplied with heat through a heating heat exchanger disposed inside the hot water storage unit. The remaining amount of power stored in the power storage unit, power consumption, power demand, and the unit price of the power are multiplied and summed to calculate the power required index, and the remaining amount and temperature of hot water stored in the hot water storage unit, temperature, hot water usage, hot water An exponential calculating unit for multiplying and summing the demand amount and the unit price of the hot water to calculate the required hot water index; A plan selector for selecting a control plan according to the values of the power required index and the hot water required index; And And a control unit for controlling the circulation path and flow rate of the thermal circulation medium by controlling the three-way valve unit according to the control plan.

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