EP0778917A1

EP0778917A1 - Low-temperature engine

Info

Publication number: EP0778917A1
Application number: EP95924967A
Authority: EP
Inventors: Georg Rauscher
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-04
Filing date: 1995-07-03
Publication date: 1997-06-18
Also published as: DE4481032D2; WO1996001363A1; AU7490894A; WO1996001362A1; EP0775250A1; AU2926795A

Abstract

The invention concerns a low-temperature engine which obtains, operating at a low temperature, mechanical energy from thermal energy. It can be designed as a compact unit as well as in component form. A liquefied gas is pumped under high pressure by a multi-cylinder pump (1) in a closed circuit into an evaporator (4) where it is evaporated by the supply of heat (e.g. waste heat or heat from the surroundings). The vapour thus formed is passed into an expansion device (8) where the large pressure drop causes it to be supercooled and liquefied. The gas can flow past the expansion device through a bypass line (25). The liquefied gas can overflow into a bypass line (45). The fields of application of the engine are comparable with those of existing internal-combustion engines (vehicle propulsion, stationary drive units and power generation). A further application is the use of the low-temperature engine as a refrigerating machine.

Description

Low-temperature motor (NTM), low-temperature motor (TTM) or refrigeration engine (KKM)

Description It is known how the petrol and diesel reciprocating engines, the rotary piston engines (ankel), the sterling engine - the steam engines, gas turbines, refrigeration machines and solar systems, as well as attempts to build a type of steam engine with the help of refrigerants. The object of this invention is to largely eliminate the disadvantages of the known motors. Vibration, noise, clocked working principle, exhaust gas pollutant problems, high weight, and cumbersome mechanics, high thermal stress on the components.

We are looking for an environmentally friendly engine that effectively relieves the earth of the harmful effects of burning fossil fuels in transport and also in the stationary sector, the greenhouse climate, as well as being highly economical and universally usable for rapid introduction and dissemination.

The solution is a low-temperature heat engine, a low-temperature engine (NTM) or low-temperature engine (TTM), which can also be referred to as a cold engine (KKM), as described in the claims, which not only increases the thermal energy to the usual high, but also to can implement a low temperature level so that usable mechanical energy is obtained. A liquid gas is pumped to a higher pressure level in a closed circuit with a pump 1, then evaporated in an evaporator 4, relaxed in a relaxation machine 8 that delivers useful power, thereby cooled, liquefied in the relaxation machine 8 or in a subsequent expansion device 24 and kept ready in a liquid collector 10 for recirculation. At the same time, a high-pressure circuit with the bypass line 45 and the bypass valve 44 is operated with liquid gas, which according to (FIG. 5) is supplied by a separate delivery rate from the pump. The pump only has to deliver the small volume of liquid while

SPARE BLADE (RULE 26) the expansion machine, for example a turbine that processes large gaseous volumes, but the volume ratio is still reduced in accordance with the set back pressure. The gas (boiling or condensation temperature and pressure) as well as the pressure and the pressure drop on the relaxation machine 8 and the temperature level are interrelated and must be matched to the vapor pressure curve. The pump 1 is driven by the expansion machine 8 via a separate motor 14 or from a power take-off.

In the liquid collector 10 on the low-pressure side, liquid gas must be at a pressure and a temperature at which the gas is liquid in accordance with its vapor pressure curve, so that this becomes

Cooling and liquefaction results in the necessary pressure drop. The pump 1 with pressure valves 3 pumps a liquid gas from the suction or low pressure line 11 on the LP side into the kHD line 2 on the HP side and into the heat exchanger or evaporator 4. The pressure valves 3 ensure that no gas flows back from the kHD line 2 or the bypass line 45 if the pump design cannot prevent this. So much heat energy 5 is supplied to the evaporator 4 that the gas evaporates even under this increased pressure. The heat of evaporation required for this is absorbed by the evaporator 4 from the environment, from the air, water or other gases, liquids or solids or from a work machine. According to (Fig. 5), the thermal energy for evaporation can at least partly come from the gas itself by converting the rotational energy of the molecules and atoms into thermal motion.

The performance of the air heat exchanger can be reduced to a minimum with insulated outer sides and closed and also insulated flaps or blinds. The devices for limiting the temperature of the evaporator 4 are controlled by a heat sensor directly or via a central control. The vaporized gas flows through the WHD line 6 through the throttle element 7 into the expansion machine 8. With the throttle element 7, the gas stream can be heated

SPARE BLÄ17 (RULE 26) HD line 6 can be reduced and also shut off. In the expansion machine 8, the pressure energy in the gas is reduced to the necessary counter pressure and mechanical work is carried out on the shaft 16. The gas gets colder. The complete expansion down to the low back pressure in the liquid collector 10 and the liquefaction should take place only after the further expansion stage in the expansion element 24 in order to avoid damage, for example due to cavitation in the expansion machine. Liquefaction can be facilitated by the back pressure. In addition, after the expansion element 24 into the LP line 9 or directly into the liquid collector 10, liquid gas is additionally expanded via the bypass line 45 and the bypass valve 44.

At a condensation point (pressure / temp.) Below the ambient temperature, in contrast to the steam engine, the heat of condensation cannot be released to the environment via a heat exchanger, since the

Environment is warmer than the temperature level of the machine. In order for the reliquefaction to work 100% (1), at least so much gas must be expanded and subcooled that the thermal energy that is extracted by the expansion or the cold that is obtained is at least sufficient to balance the amount of heat, which occurs due to the condensation and which the gas absorbs through heat conduction via components, heat radiation, or otherwise, also through thermal insulation. In order to increase the cooling capacity of the machine (for example with lower echoic output) and thus to keep the vapor pressure on the low pressure side low by means of a low temperature and to enable a sufficiently high pressure drop between the HP side and the LP side, Bypass line 25 with the bypass valve 26 (FIG.) And also via the bypass line 45 with the bypass valve 44 (FIGS. 4 and 5) additional gas can be released. The bypass valve 26 can also open automatically if the pressure in the wHD line 6 is too high, and it also serves as a high-pressure safety valve. If required, a preset portion of the pump output can also be discharged via the bypass line 45 and the bypass valve 44. In the variant according to (FIG. 5), the bypass valve 44 also serves as an overflow or maximum pressure safety valve if, for example, the pressure in the kHD line 2 or wHD line 6 increases due to the closing of the throttle element 7 as in the bypass line 45 and gas flows through the backflow preventer 43 into the bypass line 45.

The function of the bypass lines 25 and 45 is also possible when the expansion machine is at a standstill in order to keep the machine cold and ready for operation. When the pressure in the LP line 9 or in the liquid collector 10 increases, the pump 1 is switched on by a pressure or temperature monitor or also by a central control unit when the machine is at a standstill or the output of the pump 1 is increased when the machine is running in order to regulate the self-cooling . When the pressure and temperature drop, an opposite reaction is triggered.

The liquid gas can be heated close to or completely up to the boiling point in the case of severe subcooling in an additional HP heat exchanger 29 after the pump 1, in order to thereby achieve cooling capacity e.g. to use for cooling purposes.

Commercial application Low-temperature motor for driving land, air, water and underwater vehicles, work machines and aggregates of all kinds, i.e. for all areas of application of conventional internal combustion engines. Partly also in the area of use of electric motors. There are new ones in the field of energy supply

Aspects. An environmentally friendly generator that supplies one or more houses can enforce the decentralized power supply. The heating can also be done electrically instead of gas or oil. Electric heating instead of hot water makes house installation easier and cheaper.

SPARE BLADE (RULE 26) The energy dependency on a particular country or region is eliminated. The nuclear hazard and harmful and disruptive high-voltage energy routes as well.

Another area of application is the use of the NTM as a chiller.

Advantages In this new NTM, the advantages of fluid technology, such as high power density and optional component or block construction, the chillers and heat pumps, the gasoline and diesel engines and the gas turbines are combined and their disadvantages largely eliminated. Advantages are closed cycle of the energy source (refrigerant, gas), more uniform mechanical

Stress on the components and more favorable noise behavior - less noise and no combustion, lower temperature differences in the components, lower thermal stress on the components at a low temperature, high pressure level, closed compression space between the pump and the relaxation machine or motor. Component and compact design (refrigeration machine, fluid technology). Efficiency takes on a different meaning. The amount of environmentally friendly primary energy from the environment is no longer so decisive, although the last bit of efficiency could even be dispensed with in favor of the machine design.

List for naming the positions in FIGS. And 5

1 = pump

2 = kHD line (cold high pressure line)

3 = pressure valve (for pump)

4 = evaporator

5 = heat source

6 = wHD line (warm high pressure line)

7 = throttle element (in front of the turbine)

8 = relaxation machine

9 = LP line (low pressure line)

10 = liquid collector

11 = suction line

12 = heat generator

13 = LP heat exchanger

14 = motor (for pump 1)

15 = drive (for pump, envelope drive)

16 = shaft (from relaxation machine)

17 = backflow preventer (check valve)

18 = pressure vessel

19 = HD monitoring

20 = ND monitoring

21 = heat sensor

22 = cold sensor

23 = speed sensor

24 = relaxation organ

25 = bypass line

26 = bypass valve

27 = pipeline

28 = control line

29 = HP heat exchanger

30 = working machine (e.g. current generator)

31 = room

32 = overflow channels

33 = housings

34 = lid

35 = warehouse

36 = partition

37 = flow control device

38 = valve body

39 = spring element

40 = gear

41 = flange

42 = shaft coupling

43 = backflow preventer (check valve)

44 = bypass valve

45 = bypass line

ERSATZBLAH (REGEL26) Low-temperature motor (NTM), low-temperature motor (TTM) or refrigeration machine (KKM)

Claims 1) Low-temperature motor or low-temperature motor (TTM) or refrigeration machine (KKM), for driving work machines, for example an electric power generator, and of vehicles and for generating cooling power, with a closed gas circuit, in which gas is used as working medium and heat transfer medium is, the liquid gas by means of a pump 1 with one or more pressure valves 3 with high pressure through a kHD line (cold high pressure line) 2 in one

Heat exchanger or evaporator 4 is pumped, the power of which can be regulated and evaporated therein or in a plurality of heat exchangers, heat being absorbed by a heat source 5, for example heat from the ambient air or by a working machine 30, then through a wHD line 6 into a nozzle or a throttle element 7, which can be regulated and flows into a relaxation machine 8, is relaxed there and does work, and after the relaxation machine 8, directly or through an additional relaxation stage in a relaxation element 24 in the LP line 9 in a liquid collector 10 flows, and characterized in that by means of a bypass line 25 (FIG. 4) in a parallel circuit past the expansion machine 8, the expansion of vaporized gas in a expansion element, the bypass valve 26 (FIG. 4) is possible and that in another short circuit by means of the bypass line 45 the relaxation of still liquid em gas by means of another expansion element, the bypass valve 44, for example a pressure maintaining valve, it is possible for gas to flow from the kHD line 2 into the bypass line 45, that it flows according to (FIG. 5) via a backflow preventer 43 overflows that the expansion into the LP line 9 or directly into the liquid collector 10 takes place, that according to (FIG. 5) a preset portion of the still liquid gas flows through this bypass line 45 so that this portion flows through the

Claims

The delivery rate of one or more pump pistons of a cylindrical pump is that this portion can be changed, that this portion of the delivery flow of the pump 1 can also be diverted into the kHD line 2 and that the blocking effect of the backflow preventer 43 according to (Fig. 5) is canceled in the opposite direction or can be released by means of a parallel line and a regulating valve and characterized in that after the pump 1 and in front of the heat exchanger or evaporator 4 there is an additional HP heat exchanger 29 (FIG. 4) that it is constructed according to the counterflow principle that the cold of the still very cold or cryogenic liquid gas can be optimally used for cooling purposes, that this HD heat exchanger 29 is alternatively installed in the LP line 9, so that the gas in the LP line 9 in Countercurrent is cooled to approximately the temperature that the liquid gas in the liquid before the remaining relaxation in the expansion element 24 has collector 10.

2) NTM or TTM or KKM according to claim 1, characterized in that the throttle element 7 and the bypass valves 26 and 44 are non-kickback or that the throttle element 7 and the bypass valves 26 and 44 separate anti-kickback devices or

Backflow preventer are installed in the lines, and characterized in that the pressure reduction in the bypass valves 26 (Fig. 4) and 44 and in the expansion element 24 is controlled so that the gas is guided in a controlled manner after the sealing seat so that the flow cross section in the Relaxation space defines that the expansion of the relaxation space increases continuously, that the defined enlargement of the relaxation space increases up to about the low pressure level, that the enlargement of the relaxation space can also increase discontinuously in a defined manner, for example through steps or steps or channels, so that constrictions result or expansions in the relaxation area and characterized in that the enlargement of the relaxation area by a

Valve cone is enabled, the diameter from about the valve seat in the direction of flow first increases and then becomes smaller again and that the inside diameter of the housing is cylindrical from about the largest valve cone diameter and characterized in that devices in the form of grooves or ribs for guiding and guiding the gas on the valve cone or on the gas-contacting ones Parts of the housing are.

3) NTM or TTM or KKM according to the preceding claims with a pump 1 for kaltε liquid gas, which supplies all process gas circuits, characterized in that the pump has several pump units, for example in the case of a piston pump consisting of a piston, a cylinder and a cylinder head with valves exist that this pump is driven, for example, via a gearbox or a cladding drive by the output shaft of the expansion machine or by an electric motor 14, that the drive speed can be regulated, that a part of the pump units supplies only one process cycle and is characterized in that over a control element can also supply several or all pumping units to another, parallel process circuit or all process circuits.

4) NTM or TTM or KKM according to the preceding claims with a pump 1 for kalteε Flüεεiggaε, characterized in that εie alε pressure intensifier pump works, that it is driven by the high pressure gas, that the gas is expanded in the low pressure side and that the pump the process cycles supplied alone or in addition to the mechanically driven pump according to claim 3.

5) NTM or TTM or KKM according to the preceding claims with a pump for cold liquid gas, characterized in that it functions as a vibrating armature pump and how the pump according to the preceding claim works alone or in addition to another type of pump drive. 6) NTM or TTM or KKM according to the preceding claims with speed monitoring and control for the

Relaxation machine characterized in that the gas flow through the throttle element 7 or through the nozzle of the relaxation machine can be throttled or blocked, that the excess amount of gas is then passed through the bypass lines 25 (Fig. 4) or 45, that at too high pressure in the HP line 6, the pump 1 is reduced in speed by means of a pressure switch or is switched off completely, and if the temperature in the low pressure line 9 or the liquid 10 is too high or too high, the pump 1 is automatically activated by means of a pressure switch or a temperature switch switched on or increased in speed or in pump output and characterized in that the pressure in the bypass line 45 is set higher than in the kHD line 2 and wHD line 6.

7) NTM or TTM or KKM according to the preceding claims, characterized in that in the process circuit for

For example, a single-atom gas (noble gas), or a two-atom gas such as nitrogen or a multi-atom gas, for example hydrocarbon gases such as methane, or fluorinated hydrocarbons, can be used.

8) NTM or TTM or KKM according to the preceding claims, characterized in that the cold parts like the

Liquid collector 10, the throttle element 7, the relaxation device 8, the bypass valves 26 and 44, the relaxation element 24, the pump 1 and the necessary control elements and lines are cold-insulated, that they are installed in a housing and that these components are in this housing are vacuum insulated.

9) NTM or TTM or KKM according to the preceding claims, characterized in that the low-temperature motor or the refrigerating machine drives a power generator that an operation with the usual frequencies 50 Hz or 60 Hz takes place that the machine also on others

Frequencies can be designed to be one of these others Frequencies is 100 Hz and that between frequencies with the ratio 1: 2, for example the frequency 50 Hz and 100 Hz, a quick switchover is possible in that the switchover takes place in that two poles or electrical coils are interconnected in such a way that They function according to their function like a pole or like a larger coil.

10) NTM or TTM or KKM according to the preceding claims, characterized in that it is combined with a work machine to form a compact unit, that the work machine is a power generator that works according to the oscillating armature principle, that the working piston and the pump piston are on the same axis ε are that the pump piston is graduated and smaller in diameter than the piston driven by the compressed gas, that the ratio of the piston areas is selected depending on the pressure and the volume ratio of the liquid gas to the process gas, that there are also two working pistons and two pump pistons on the same axis can be and move back and forth in the pressure-tight cylinder, similar to a free-flying piston, and characterized in that on the reciprocating piston or on its extension one or more magnets and on the fixed cylinder housing are one or more electrical coils that of this en coils via supply lines, an induced current can be taken off, and characterized in that one or more coils can also be on the movable part, that is to say on the piston or its extension, that the standing parts

Coils are arranged on the outside of the housing and that, alternatively, the coils for reducing eddy currents and increasing the efficiency are arranged within the pressure housing and that the feed lines are led to the outside via pressure-tight and electrically insulated bushings and characterized in that the control of the gas for the The piston or the double piston is driven via inlet and outlet slots so that control of the gas by means of solenoid valves for starting and alternatively also for operation is provided, that the solenoid valves control the gas flow directly or by means of Devices so that the solenoid valves only have small nominal widths and the gas actuates a piston, which opens a valve opening, which has a larger opening and thus a larger amount of gas in the shortest possible time to the expansion machine or, in the case of a piston engine, into the cylinder can flow to the working piston and is characterized in that starting the working piston is also possible in that the built-in power generator works in the starting phase as an oscillating armature motor.

11) NTM or TTM or KKM according to the preceding claims, characterized in that a physical possibility of the gases is partially or completely exploited in the process circuit, with the help of which it is possible that the gas can cool down without giving off energy and vice versa that the gas cooled in this way can heat up again without it absorbing energy from the outside, that this is possible by supporting the conversion of the translational movement or thermal movement of the atoms and molecules into the rotational movement and back again, so that this conversion is supported through the special arrangement and design of the expansion elements, through a special design of the process cycle and through the special guidance of the gas in the process cycle.