CN203603990U - Cold energy liquid air engine system - Google Patents
Cold energy liquid air engine system Download PDFInfo
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- CN203603990U CN203603990U CN201320657369.0U CN201320657369U CN203603990U CN 203603990 U CN203603990 U CN 203603990U CN 201320657369 U CN201320657369 U CN 201320657369U CN 203603990 U CN203603990 U CN 203603990U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a cold energy liquid air engine system which can use cold energy generated when liquid air (liquid nitrogen) is gasified to perform the Rankine cycle for doing useful work. The cold energy liquid air engine system is composed of a liquid air tank, a low-temperature liquid pump, a heat exchanger, a constant-temperature compressor, a constant-temperature pneumatic engine (an expansion engine) and others. A cycle working medium is the liquid air or the liquid nitrogen, the liquid air is used for performing the Rankine cycle, and the cold energy generated by the liquid air is used for doing useful work. The liquid air (the liquid nitrogen) useful energy is used to the maximum in the system, so that the purpose of efficiently saving energy is achieved. In the system, only the same working medium namely the air is used, and the same pneumatic engine outputs power, so that the system is simple, the problems that the working medium leaks, explodes and pollutes the environment are avoided, and the frosting phenomenon can not happen when the liquid air is gasified. When used for an urban traffic vehicle, the liquid air engine system has the effects of air conditioner refrigeration, urban air purification, haze reduction and urban heat island effect reduction.
Description
Affiliated technical field
The utility model relates to a kind of liquid air collection engine system, and the cold energy producing especially can recycle liquid air (liquid nitrogen) gasification time does the liquid air collection engine system of useful work.
Background technique
At present, known liquid air collection engine is that liquid air (liquid nitrogen) is as working medium endothermic gasification in ambient air, the Rankine cycle mode that expands and do work in pneumatic motor (decompressor), after acting, working medium is discharged system entered environment air.While gasification due to liquid air (liquid nitrogen), need a large amount of heats, produce a large amount of cold energy (liquid air evaporation enthalpy), if only utilize liquid air (liquid nitrogen) to do Rankine cycle, the low temperature that not only a large amount of cold energy of waste, and liquid air produces in evaporation gasification can cause evaporator surface frosting will greatly reduce motor mechanical efficiency.In order to improve cycle efficiency, people have proposed again topping endless form and liquid nitrogen Rankine cycle+brayton cycle topping endless form of liquid nitrogen Rankine cycle+Stirling circulation, also have low temperature agent topping endless form.In the topping endless form and liquid nitrogen Rankine cycle+brayton cycle topping endless form of the circulation of liquid nitrogen Rankine cycle+Stirling, because the working medium of brayton cycle and Stirling circulation is all to adopt helium, helium is rare gas, with high costs, and also have the situation of refrigerant leakage, and as two cover systems, just there are two cover power outputs, systematic comparison complexity, therefore be difficult to practical.Low temperature agent topping endless form adopts many cover Rankine cycle modes, as methane for working medium, ethane, liquid nitrogen composition Rankine pull out an endless form and have also obviously improved the cycle efficiency of system, but methane, ethane are all inflammable and explosive working medium, and be many cover systems, system has the output of many cover power, system is more complicated, is more difficult to practical.
Summary of the invention
Can not make full use of in order to overcome existing liquid air (liquid nitrogen) motor inefficiency and the deficiency of various topping circulatory system complicated difficult to realize that the reasons such as cold energy (low temperature environment producing after cryogenic fluid enthalpy of vaporization and vaporization), evaporimeter frosting cause, a large amount of cold energy that the utility model provides a kind of recycling liquid air (liquid nitrogen) to produce in the time of gasification do the cold energy liquid air collection engine system of useful work.Native system not only utilizes liquid air or liquid nitrogen to do Rankine cycle, also utilize Carnot's cycle principle, the cold energy producing in the time that liquid air (liquid nitrogen) gasifies is as low-temperature receiver, ambient air is as thermal source, the tail gas (air) of air motor is the topping circulation in order to system as working medium, this system utilizes the using waste heat from tail gas of pneumatic motor and heat pump principle to liquid air (liquid nitrogen) heat supply so that liquid air (liquid nitrogen) gasification, the working medium that whole system adopts is same working medium, and whole system only has a power output, the merit that whole system obtains is Rankine technology merit+Kano topping circulation merit sum, thereby greatly improve the efficiency of liquid air (liquid nitrogen) motor, also greatly improved practicability.
The utility model solves the technological scheme that its technical problem adopts: cold energy liquid air collection engine system adopts liquid air or liquid nitrogen as acting working medium, the high pressure air drives pneumatic motor acting that not only utilizes liquid air (liquid nitrogen) gasification to produce, also utilize liquid air or liquid nitrogen as low-temperature receiver, ambient air is as thermal source, the tail gas (air) of air motor is as working medium in order to Carnot's cycle, and the useful work obtaining at pneumatic motor is Rankine technology merit+Carnot's cycle merit sum.
System is by formations such as liquid-air tank, cryogenic liquid pump, heat exchanger, isothermal compressor, isothermal pneumatic motors (decompressor).Wherein, the drain pipe of liquid-air tank (1) is connected with the liquid inlet pipe of cryogenic liquid pump (2), the drain pipe of cryogenic liquid pump (2) is connected with the liquid inlet pipe (27) of liquid air heat exchanger (3), the drain pipe (28) of liquid air heat exchanger (3) is connected with the liquid inlet pipe (24) of isothermal compressor internal exchanger (4), the steam outlet pipe (25) of isothermal compressor internal exchanger (4) is connected with the suction tude (29) of heat-heat exchanger (5) again, the steam outlet pipe (30) of heat-heat exchanger (5) is connected with the suction tude of ambient heat exchanger (6) again, the steam outlet pipe of ambient heat exchanger (6) more successively with solenoid valve (22), flow control valve (23) is connected, the steam outlet pipe of flow control valve (23) is connected with the suction tude of isothermal air motor (7), the outlet pipe You Liangge branch of isothermal pneumatic motor (7), branch is connected with another suction tude (31) of heat-heat exchanger (5) again, another steam outlet pipe (32) of heat-heat exchanger (5) and the suction tude (33) of liquid air heat exchanger (3) are connected again, the steam outlet pipe (34) of liquid air heat exchanger (3) is connected with the suction tude of isothermal compressor (9), the steam outlet pipe (25) of the outlet pipe of isothermal compressor (9) and isothermal compressor internal exchanger (4) is also connected in the suction tude (29) of heat-heat exchanger (5) again, another branch of the outlet pipe of isothermal pneumatic motor (7) is connected with silencing apparatus (14).
Its working medium circulation principle is: the liquid air (liquid nitrogen) in liquid-air tank (1) after cryogenic liquid pump (2) supercharging at liquid air heat exchanger (3) and isothermal compressor internal exchanger (4) endothermic gasification, high-pressure working medium after gasification arrives heat-heat exchanger (5) again again and absorbs air motor using waste heat from tail gas, working medium arrives ambient heat exchanger (6) absorbing environmental air heat again, last working medium is done expansion work to isothermal pneumatic motor (7) again, outside the tail gas part discharger expanding after acting, another part is through heat-heat exchanger (5) precooling again, the cold energy producing when arriving liquid air heat exchanger (3) again and being gasified by liquid air (liquid nitrogen) is cooling, finally by isothermal compressor (9) isothermal compression, working medium after compression plays in ambient air and absorbs heat with the working medium merging one of doing Rankine cycle, finally arrive isothermal pneumatic motor (7) expansion acting, complete the topping circulation of the Rankine cycle+Carnot's cycle of a liquid air.
The beneficial effects of the utility model are, one, the cold energy that produced while farthest having utilized liquid air or liquid nitrogen gasification of system is used for increasing the useful work of system; Thereby reach energy-efficient object, two, liquid air (liquid nitrogen) does not need directly endothermic gasification from ambient air in the time of gasification, but the gasification of the waste heat of the air motor tail gas absorbing, so liquid air (liquid nitrogen) system in the time of gasification does not have frost; Three, in whole system circulation, be all that same working medium is air, so there is not refrigerant leakage, blast, pollution problem, ambient air played to catharsis; Four, the cold energy that whole system farthest produces native system and the waste heat of pneumatic motor exhaust have carried out heat exchange, thereby have reduced the heat that system absorbs from ambient air; Five, in topping circulation, only have air motor (decompressor) outputting power and same working medium circulation, so systematic comparison simply, easily realize; What six, compressor sucked is the tail gas expanding after acting, and it is pure air, and the inside does not have moisture and dust, so system there will not be ice stifled and dirty stifled; Seven, working medium can absorb a large amount of heats in the time expanding acting, plays the effect of refrigeration air-conditioner; Eight,, when liquid air (liquid nitrogen) engine system is as urban transportation motor car engine, play the effect of Cress urban air, reduction haze phenomenon, reduction urban heat land effect.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is circulation theory figure of the present utility model.
Fig. 2 is isothermal expansion machine and the isothermal compressor schematic diagram of cold energy liquid air collection engine system.
Fig. 3 is that cold energy liquid air collection engine system is used in the car deceleration gas circulation schematic diagram in when braking.
1. liquid-air tanks in figure, 2. cryogenic liquid pump, 3. liquid air heat exchanger, 4. isothermal compressor internal exchanger, 5. heat-heat exchanger again, 6. ambient heat exchanger, 7. isothermal pneumatic motor, 8. exhaust vent, 9. isothermal compressor, 10. isothermal pneumatic motor internal exchanger, 11. heat exchangers, 12. solenoid valves, 13. flow control valves, 14. silencing apparatuss, 15. gas holder, 16. isothermal pneumatic motor pistons, 17. isothermal pneumatic motor high pressure admission doors, 18. isothermal exhaust of pneumatic motor doors, 19. isothermal pneumatic motor antifreeze liquid drain pipes, 20. isothermal pneumatic motor antifreeze liquid liquid inlet pipes, 21. isothermal compressor pistons, 22. isothermal compressor air-intake valve plates, 23. isothermal compressor exhaust valve plates, 24. isothermal compressor internal exchanger liquid inlet pipes, 25. isothermal compressor internal exchanger steam outlet pipes, 26. bent axles, 27. liquid air heat exchanger liquid inlet pipes, 28. liquid air heat exchanger drain pipes, 29. heat-heat exchanger suction tude again, 30. heat-heat exchanger steam outlet pipes again, 31 another suction tude of heat-heat exchanger again, 32. another steam outlet pipes of heat-heat exchanger again, 33. liquid air heat exchanger suction tude, 34. liquid air heat exchanger steam outlet pipes.
Embodiment
In Fig. 1, the drain pipe of liquid-air tank (1) is connected with the liquid inlet pipe of cryogenic liquid pump (2), the drain pipe of cryogenic liquid pump (2) is connected with liquid air heat exchanger liquid inlet pipe (27), liquid air heat exchanger drain pipe (28) is connected with isothermal compressor internal exchanger liquid inlet pipe (24), isothermal compressor internal exchanger steam outlet pipe (25) is connected with heat-heat exchanger suction tude (29) again, heat-heat exchanger steam outlet pipe (30) is connected with the suction tude of ambient heat exchanger (6) again, the steam outlet pipe of ambient heat exchanger (6) more successively with solenoid valve (22), flow control valve (23) is connected, the steam outlet pipe of flow control valve (23) is connected with the suction tude of isothermal pneumatic motor (7), the outlet pipe You Liangge branch of isothermal pneumatic motor (7), branch is connected with another suction tude of heat-heat exchanger (31) again, another steam outlet pipe of heat-heat exchanger (32) is connected with liquid air heat exchanger suction tude (33) again, liquid air heat exchanger steam outlet pipe (34) is connected with the suction tude of isothermal compressor (9), the outlet pipe of isothermal compressor (9) and isothermal compressor internal exchanger steam outlet pipe (25) are also connected in heat-heat exchanger suction tude (29) again, another branch of the outlet pipe of isothermal pneumatic motor (7) is connected with silencing apparatus (14).
Working medium in liquid-air tank (1) is liquid air or liquid nitrogen.Liquid air (liquid nitrogen) in liquid-air tank (1) absorbs heat in cryogenic liquid pump (2) is pressurized to liquid air heat exchanger (3), after working medium heat absorption, become liquid-vapor mixture, working medium enters isothermal compressor internal exchanger (4) again and is heated as gaseous working medium, high-pressure working medium after gasification arrives heat-heat exchanger (5) again again and absorbs pneumatic motor using waste heat from tail gas, working medium arrives ambient heat exchanger (6) absorbing environmental air heat again, working medium has now been the air of normal temperature high voltage, working medium is done expansion work to isothermal pneumatic motor (7) again, finish a tail gas part for expansion work through exhaust vent (8) discharge system, another part is through heat-heat exchanger (5) precooling again, exhaust temperature reduces, volume-diminished, the cold energy producing when tail gas after cooling enters liquid air heat exchanger (3) again and gasified by liquid air (liquid nitrogen) is cooling, exhaust temperature further reduces, volume-diminished, and then by isothermal compressor (9) isothermal compression, working medium merging after working medium after compression and gasification continues to enter heat exchanger (5), continue thus circulation.
In Fig. 1, the gasification heat of working medium derive from expand acting after using waste heat from tail gas and the heat of compression of compressor.Wherein, what heat exchanger (3) played act as: working medium is in the exchange of liquid air heat exchanger (3) and exhaust gas heat, working medium endothermic gasification, and the tail gas temperature that is cooled reduces, volume-diminished.
Isothermal compressor internal exchanger (4) is acting as of playing: the working medium mixture not being gasified totally absorbs heat until be gasified totally at isothermal compressor internal exchanger (4), liquid refrigerant and isothermal compressor (9) heat exchange, play two effects, one, make liquid refrigerant endothermic gasification, two, as low-temperature receiver, reduce the temperature of the first gentle isothermal compressor (9) of compressed working medium, accomplish accurate isothermal compression, thereby reduce the power consumption of compressor (9).
What heat-heat exchanger (5) played again act as: the cryogenic fluid after gasification is in heat exchanger (5) heat exchange, reduce exhaust temperature, improve the temperature of high-pressure air, thereby take full advantage of the cold energy that working medium gasification produces, reduce the caloric receptivity of working medium in ambient heat exchanger (6), also just reduced the frosting possibility of ambient heat exchanger (6).
What ambient heat exchanger (6) played act as: working medium, at fully absorbing environmental heat of ambient heat exchanger (6), makes working medium reach ambient temperature.
What isothermal pneumatic motor internal exchanger (10) played act as: the heat of antifreeze liquid is passed to the working medium of doing expansion work.
Acting as of heat exchanger (11): absorbing environmental air heat, with the antifreeze liquid (ethylene glycol solution) in this heat reheat heat exchanger (11) pipe.The ambient air heat absorbing from heat exchanger (11) is passed to isothermal air motor internal exchanger (10) by circulation through antifreeze liquid.
In system, utilize flow control valve (13) to control the rotating speed of pneumatic motor (7), utilize gas holder (15) that unnecessary pressurized gas are stored, solenoid valve (12) is pneumatic opens and closes the effect that enters pneumatic motor (7).
The cold energy having produced in the time that whole system has been utilized liquid air gasification to greatest extent, has reduced the caloric receptivity of whole system in ambient air, thereby has reduced the possibility of frosting when heat exchanger (6) absorbs heat from ambient air; When liquefied air (liquid nitrogen) gasification, do not need directly from ambient air, to absorb heat, but utilize the waste heat gasification of tail gas and the heat pump principle gasification of compressor, not only recycled cold energy, and greatly improved the cycle efficiency of system.In system, environment is high temperature heat source, and liquid air (liquid nitrogen) is low-temperature heat source, and working medium, in low-temperature heat source isothermal compression, expands and does work at high temperature heat source, meets thermodynamic principle.In the topping circulation of system, use be same working medium, same pneumatic motor (decompressor), same heat exchanger (6) absorbs heat in ambient air, the working medium of topping circulation is gaseous state, do not have phase transformation to produce, thereby system equipment is relatively simple.In system, by adding topping circulation significantly to improve the conversion efficiency of liquid air (liquid nitrogen) useful energy.In system, the expansion work obtaining at pneumatic motor is the topping circulation merit sum of liquid air (liquid nitrogen) Rankine cycle technology merit and Carnot's cycle.
Fig. 2 is isothermal pneumatic motor and the isothermal compressor schematic diagram of cold energy liquid air collection engine system, isothermal pneumatic motor cylinder head top is provided with high pressure admission door (17) and exhaust valve (18), there is internal exchanger (10) in pneumatic motor cylinder head inside, taper fin is arranged at piston (16) top, the internal exchanger (10) of pneumatic motor cylinder head is taper fin, the taper fin of internal exchanger (10) and piston (16) top tapered fin are chimeric mutually, in the time of gas expansion for doing work, gas temperature can reduce, the ethylene glycol antifreeze of taper fin the inside provides heat for the acting gas that expands, when isothermal pneumatic motor piston (16) does work downwards, pneumatic motor intake valve (17) is opened, high-pressure air enters, pneumatic motor piston (16) is upwards when exhaust, working medium is discharged from exhaust of pneumatic motor door (18): the antifreeze liquid heat absorption enters from pneumatic motor antifreeze liquid liquid entering hole (20), after heat release, discharges from pneumatic motor antifreeze liquid liquid outlet (19).
What isothermal compressor (9) was different from traditional compressor is that compresser cylinder head has internal exchanger (4) and piston head to have taper fin, compresser cylinder head internal exchanger (4) is taper fin, the taper fin of cylinder head internal exchanger (4) and the taper fin of piston head are chimeric mutually, when gas is compressed, can produce a large amount of heat of compression, this heat is absorbed by the liquid air (liquid nitrogen) of fin the inside, and liquid air (liquid nitrogen) gasifies after absorbing the heat of compression; Liquid air (liquid nitrogen) in order to cooling isothermal compressor (9) enters from isothermal compressor liquid air (liquid nitrogen) liquid entering hole (24), after gasification, discharges from isothermal compressor liquid air (liquid nitrogen) liquid outlet (25); In the time that isothermal compressor piston (21) moves downwards, entered by isothermal compressor air-intake valve plate (22) from the tail gas of pneumatic motor, after isothermal compression, working medium is discharged by isothermal compressor exhaust valve plate (23).In the time of the periodic duty of this device, pneumatic motor (7) drives isothermal compressor (9) running.
Fig. 3 is that cold energy liquid air collection engine system is used in the car deceleration gas circulation schematic diagram in when braking, automobile is in descent run and retarding braking process, utilize the pneumatic braking mode of isothermal compressor (9) to carry out retarding braking, the Brake Energy of automobile is converted into high-pressure air to be stored in gas holder (15), its principle is: when car deceleration braking, cryogenic liquid pump (2) quits work, solenoid valve (12) cuts out, compressor (9) sucks ambient air from exhaust vent (8), through the compression of compressor (9), pressurized air is after ambient heat exchanger (6) heat radiation, pressurized air enters gas holder (15) and stores.Retarding braking can be stored to two advantages, one, solved the safety problem that automobile downhill travels, two, increased the course continuation mileage of automobile.
Claims (3)
1. a cold energy liquid air collection engine system, by liquid-air tank, cryogenic liquid pump, heat exchanger, isothermal air motor, isothermal compressor, solenoid valve, flow control valve, gas holder forms, it is characterized in that: the drain pipe of liquid-air tank (1) is connected with the liquid inlet pipe of cryogenic liquid pump (2), the drain pipe of cryogenic liquid pump (2) is connected with liquid air heat exchanger liquid inlet pipe (27), liquid air heat exchanger drain pipe (28) is connected with isothermal compressor internal exchanger liquid inlet pipe (24), isothermal compressor internal exchanger steam outlet pipe (25) is connected with heat-heat exchanger suction tude (29) again, heat-heat exchanger steam outlet pipe (30) is connected with the suction tude of ambient heat exchanger (6) again, the steam outlet pipe of ambient heat exchanger (6) more successively with solenoid valve (22), flow control valve (23) is connected, the steam outlet pipe of flow control valve (23) is connected with the suction tude of isothermal air motor (7), the outlet pipe You Liangge branch of isothermal air motor (7), branch is connected with another suction tude of heat-heat exchanger (31) again, another steam outlet pipe of heat-heat exchanger (32) is connected with liquid air heat exchanger suction tude (33) again, liquid air heat exchanger steam outlet pipe (34) is connected with the suction tude of isothermal compressor (9), the outlet pipe of isothermal compressor (9) and isothermal compressor internal exchanger steam outlet pipe (25) are also connected in heat-heat exchanger suction tude (29) again, another branch of the outlet pipe of isothermal air motor (7) is connected with silencing apparatus (14).
2. cold energy liquid air collection engine system according to claim 1, it is characterized in that: be that compresser cylinder head has internal exchanger (4) and piston head to have taper fin, cylinder head internal exchanger (4) is taper fin, and the taper fin at the taper fin of cylinder head internal exchanger (4) and piston (21) top is chimeric mutually.
3. cold energy liquid air collection engine system according to claim 1, it is characterized in that: isothermal pneumatic motor cylinder head top is provided with high pressure admission door (17) and exhaust valve (18), there is internal exchanger (10) in pneumatic motor cylinder head inside, taper fin is arranged at piston (16) top, the internal exchanger (10) of pneumatic motor cylinder head is taper fin, and the taper fin of internal exchanger (10) and piston (16) top tapered fin are chimeric mutually.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320657369.0U CN203603990U (en) | 2013-10-23 | 2013-10-23 | Cold energy liquid air engine system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320657369.0U CN203603990U (en) | 2013-10-23 | 2013-10-23 | Cold energy liquid air engine system |
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| CN203603990U true CN203603990U (en) | 2014-05-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527274A (en) * | 2013-10-23 | 2014-01-22 | 肖波 | Cold energy liquid air (liquid nitrogen) engine system |
| CN104165071A (en) * | 2014-07-25 | 2014-11-26 | 北京航空航天大学 | Open-close coupling type thermodynamic cycle method based on liquefied air heat-to-power conversion |
| CN105134319A (en) * | 2015-08-20 | 2015-12-09 | 牟大同 | Method for utilizing liquefied air for working to drive mechanical equipment and method for utilizing liquid nitrogen for working to generate electric energy |
| CN107654259A (en) * | 2017-09-15 | 2018-02-02 | 太原矿机电气股份有限公司 | A kind of liquid air dynamical system |
| CN114459165A (en) * | 2022-02-14 | 2022-05-10 | 济宁圣峰环宇新能源技术有限公司 | Heat engine system for approximately isothermal twice expansion work |
-
2013
- 2013-10-23 CN CN201320657369.0U patent/CN203603990U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527274A (en) * | 2013-10-23 | 2014-01-22 | 肖波 | Cold energy liquid air (liquid nitrogen) engine system |
| CN104165071A (en) * | 2014-07-25 | 2014-11-26 | 北京航空航天大学 | Open-close coupling type thermodynamic cycle method based on liquefied air heat-to-power conversion |
| CN104165071B (en) * | 2014-07-25 | 2017-01-18 | 北京航空航天大学 | Open-close coupling type thermodynamic cycle method based on liquefied air heat-to-power conversion |
| CN105134319A (en) * | 2015-08-20 | 2015-12-09 | 牟大同 | Method for utilizing liquefied air for working to drive mechanical equipment and method for utilizing liquid nitrogen for working to generate electric energy |
| CN107654259A (en) * | 2017-09-15 | 2018-02-02 | 太原矿机电气股份有限公司 | A kind of liquid air dynamical system |
| CN114459165A (en) * | 2022-02-14 | 2022-05-10 | 济宁圣峰环宇新能源技术有限公司 | Heat engine system for approximately isothermal twice expansion work |
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Granted publication date: 20140521 Termination date: 20141023 |
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