CN109578100A - A kind of heat exchange-power generation integrated system and control method using liquid nitrogen - Google Patents

A kind of heat exchange-power generation integrated system and control method using liquid nitrogen Download PDF

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Publication number
CN109578100A
CN109578100A CN201811605966.2A CN201811605966A CN109578100A CN 109578100 A CN109578100 A CN 109578100A CN 201811605966 A CN201811605966 A CN 201811605966A CN 109578100 A CN109578100 A CN 109578100A
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China
Prior art keywords
heat exchange
liquid nitrogen
exchange box
heat
liquid level
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Pending
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CN201811605966.2A
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Chinese (zh)
Inventor
刘海峰
崔雁清
易文韬
杨智
尧命发
郑尊清
王浒
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Tianjin University
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Tianjin University
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Priority to CN201811605966.2A priority Critical patent/CN109578100A/en
Publication of CN109578100A publication Critical patent/CN109578100A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10Adaptations for driving, or combinations with, electric generators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag

Abstract

The invention discloses a kind of heat exchange-power generation integrated systems and control method using liquid nitrogen.In the present system, electronic control unit ECU controls liquid nitrogen pump, refrigerant liquid nitrogen is introduced into heat exchange box by electromagnetism valve events.The fluid (gas, liquid) of required heat exchange rejects heat to liquid nitrogen in heat exchanging pipe to achieve the purpose that cooling, while further being generated electricity using the nitrogen of expanded by heating, realizes the recycling of energy.Controlling electromagnetism valve events by electronic control unit ECU may be implemented fluid (the gas, liquid) temperature that will be exchanged heat control in setting value, realizes and adjusts to the intelligence of cooling temperature.Structure of the invention is simpler, at low cost, and maintenance is convenient, and may be used to engine etc. has compared with the equipment of high heat load and higher heat exchange demand realization fast cooling.

Description

A kind of heat exchange-power generation integrated system and control method using liquid nitrogen
Technical field
The present invention relates to a kind of novel heat exchange-power generation integrated systems and control method using liquid nitrogen.Belong to internal combustion engine etc. With the technical field compared with high heat load and higher heat exchange demand.
Background technique
The bottleneck factor that limit engine technology further develops first is that internal combustion engine certain operating condition thermic loads it is excessive and How rapid cooling the problem of.Research shows that: when mean effective pressure reaches 40bar in IC engine cylinder, exhaust valve surface temperature Be up to 500-550 DEG C, the temperature of piston combustion bowl edge surface be up to 500 DEG C, inlet valve be up to 350-400 DEG C;? Mean effective pressure is under the working environment of 80bar, and piston face temperature will be increased more than 600 DEG C, and currently used aluminium is living The fusing point of aluminium is 660 DEG C in plug.Compared under high heat load, if can not achieve rapid cooling, internal combustion engine material will face cracking, The problems such as fusing, fatigue failure.
It includes water cooling and air-cooled for being usually used in the radiating mode of internal combustion engine at present, but there is exchange capability of heat limited, heat exchange The problems such as time is longer.When internal combustion engine is run under high load working condition for a long time, it is possible that phenomena such as coolant boiling, it is interior Heat can not normally scatter and disappear in combustion engine cylinder, and each part heat load increases, and cause very big peace to the operation of internal combustion engine normal table Full hidden danger.
Summary of the invention
It is an object of the invention to overcome the shortcomings of prior art, a kind of novel heat exchange using liquid nitrogen-power generation collection is provided At system and control method, there is engine etc. and realize fast cooling compared with the equipment of high heat load and higher heat exchange demand, together When the present invention can also further be generated electricity using the nitrogen of expanded by heating, realize the recycling of energy.
A kind of heat exchange-power generation integrated system using liquid nitrogen, including electronic control unit ECU, it is logical that high pressure stores up the outlet of nitrogen tank Cross the liquid that liquid nitrogen pipeline is sequentially connected at the top of the outlet insertion heat exchange box of liquid nitrogen pump and the first solenoid electric valve and liquid nitrogen pipeline Nitrogen inlet setting;
The heat exchanging pipe of delivery heat transfer fluid is installed in the heat exchange box, the entrance of the heat exchanging pipe, The left and right sides setting of heat exchange box, the entrance of the heat exchanging pipe and the infusion for being used for delivery heat transfer fluid are stretched out in outlet respectively Tube outlet is connected, and the outlet of the heat exchanging pipe is connected with liquor charging pipeline import, and temperature is housed in heat exchanging pipe exit Sensor;
It is separately installed with the second solenoid electric valve and pressure sensor on the heat exchange box roof, in the heat exchange It is separately installed with the first liquid level sensor and the second liquid level sensor on the lower sides and upper portion side wall of case, in the heat exchange The bottom face center of case is equipped with third solenoid valve, is discharged into for remaining liquid nitrogen after the completion of exchanging heat in heat exchange box In external environment;
First solenoid electric valve, the second solenoid electric valve, third solenoid valve, the first liquid level sensor, the second liquid Position sensing, temperature sensor, pressure sensor and liquid nitrogen pump pass through control line respectively and are connected with electronic control unit ECU;
Battery is installed outside the heat exchange box, the positive and negative anodes of the battery pass through electric wire and generator respectively Corresponding output connection is connected, and the rotation axis of the generator is connected with impeller, and the impeller is located at the second Electromagnetic Control Valve outlet position directly above.
Utilize heat exchange-power generation integrated control method of liquid nitrogen, comprising the following steps:
Step 1: liquid nitrogen liquid level in the first liquid level sensor detection heat exchange box, when liquid nitrogen liquid level is lower than first in heat exchange box When liquid level sensor, the first liquid level sensor transmits a signal to electronic control unit ECU, and electronic control unit ECU issues letter Number control the first solenoid electric valve open, control liquid nitrogen pump start to work, liquid nitrogen by liquid nitrogen pipeline from high pressure store up nitrogen tank conveying Into heat exchange box;As liquid nitrogen is constantly added into, liquid nitrogen liquid level constantly rises in heat exchange box, when liquid nitrogen liquid level is more than the second liquid level When sensor, the second liquid level sensor transmits a signal to electronic control unit ECU, and electronic control unit ECU issues signal control The closing of the first solenoid electric valve is made, control liquid nitrogen pump stops working, and the fluid of heat exchange enters heat exchange box by heat exchanging pipe entrance In, and outflow heat exchange box is exported by heat exchanging pipe, the fluid of heat exchange is released thermal temperature reduction at heat exchanging pipe tube wall, is changed The heat that the fluid of heat is released is absorbed by liquid nitrogen, and liquid nitrogen temperature increases and volume expansion becomes gaseous state, pressure in heat exchange box Constantly increase;Temperature sensor persistently detects the fluid temperature (F.T.) of heat exchange, if fluid temperature (F.T.) is not reduced to setting value, pressure sensing Pressure in device real-time monitoring heat exchange box, and transmit a signal to electronic control unit ECU;When in the surveyed heat exchange box of pressure sensor Pressure reaches setting high pressure, and electronic control unit ECU issues signal and controls the second solenoid electric valve opening, heat exchange box mesohigh nitrogen Gas flows out heat exchange box by the second solenoid electric valve, and high pressure nitrogen drives wheel rotation, and impeller drives rotation axis rotation, rotation axis Electrical power generators are driven, the power storage issued is in battery, as high pressure nitrogen flows out heat exchange box, pressure in heat exchange box It gradually decreases, when pressure is reduced to setting low pressure in heat exchange box, electronic control unit ECU issues signal and controls the second Electromagnetic Control Valve is closed;If the fluid temperature (F.T.) that temperature sensor detects in this process is lower than setting value, all processes are interrupted, directly It is transferred to step 3;
Step 2: the fluid temperature (F.T.) of temperature sensor detection heat exchange, while in the first liquid level sensor detection heat exchange box Liquid nitrogen liquid level;If liquid nitrogen liquid level is lower than the first liquid level sensor in heat exchange box, step 1 is repeated, if temperature passes in the process The fluid temperature (F.T.) that sensor detects is reduced to setting value, is transferred to step 3;If liquid nitrogen liquid level is passed higher than the first liquid level in heat exchange box When sensor, fluid continues to exchange heat with liquid nitrogen, until the fluid temperature (F.T.) that temperature sensor detects is reduced to setting value, is transferred to step Three;
Step 3: electronic control unit ECU control second solenoid valve is opened, the nitrogen discharge of expanded by heating in heat exchange box, Impeller rotation power generation;Electronic control unit ECU controls third solenoid valve and opens, and remaining liquid nitrogen is discharged outside in heat exchange box In environment, then electronic control unit ECU controls third solenoid valve and closes, and electronic control unit ECU controls second solenoid valve and closes It closes, the fluid temperature (F.T.) of heat exchange in heat exchanging pipe is thus avoided to continue to reduce;
Step 4: temperature sensor persistently detects the fluid temperature (F.T.) of heat exchange, when the fluid temperature (F.T.) of heat exchange is higher than setting When value, repeat Step 1: two, three, four.
Compared with prior art, present invention has the advantage that
First, compared with traditional heat exchangers, the present invention uses liquid nitrogen as refrigerant, and cooling time is shorter, cooling effect It becomes apparent from.
Second, the present invention using heat exchange after energy possessed by expanded by heating nitrogen, drive generator rotation, realize Portion of energy recycling.
Third, structure of the invention is simpler, at low cost, and maintenance is convenient.
Detailed description of the invention
Fig. 1 is heat exchange-power generation integrated system structural schematic diagram of the invention using liquid nitrogen.
Specific embodiment
The present invention will be described in detail with specific implementation with reference to the accompanying drawing.
A kind of heat exchange-power generation integrated system using liquid nitrogen of the invention as shown in drawings, including electronic control unit The outlet of ECU21, high pressure storage nitrogen tank 1 are sequentially connected liquid nitrogen pump 2 and the first solenoid electric valve 4 and liquid nitrogen by liquid nitrogen pipeline 3 The liquid nitrogen import setting at 15 top of outlet insertion heat exchange box of pipeline 3.
The heat exchanging pipe 18 of delivery heat transfer fluid is installed in the heat exchange box 15, the heat exchanging pipe 18 Entrance, outlet respectively stretch out heat exchange box 15 the left and right sides setting, the entrance of the heat exchanging pipe be used for delivery heat transfer stream The infusion pipeline outlet of body (gas, liquid) is connected, and the outlet of the heat exchanging pipe is connected with liquor charging pipeline import, heat exchange system System is that the fluid (gas, liquid) of required heat exchange provides the place of heat exchange, and fluid (gas, liquid) heat is released to liquid Nitrogen is to achieve the purpose that cooling.Preferred heat exchanging pipe is U-typed coil pipe.Temperature sensor is housed at heat exchanging pipe outlet 13 14, for measuring temperature of the heat exchanging fluid (gas, liquid) after exchanging heat.
It preferably is enclosed with asbestos thermal insulation material 16 on heat exchange box outer wall, to play the role of being insulated with external environment.
It is separately installed with the second solenoid electric valve 12 and pressure sensor 5 on 15 roof of heat exchange box, described Heat exchange box 15 lower sides and upper portion side wall on be separately installed with the first liquid level sensor 19 and the second liquid level sensor 22, Third solenoid valve 17 being installed in the bottom face center of the heat exchange box 15, being completed for will exchange heat in heat exchange box 15 Remaining liquid nitrogen is discharged into external environment afterwards.
First solenoid electric valve 4, the second solenoid electric valve 12, third solenoid valve 17, the first liquid level sensor 19, Second level sensing 22, temperature sensor 14, pressure sensor 5 and liquid nitrogen pump 2 are single by control line and electronic control respectively First ECU21 is connected.Preferred pressure sensor is located at heat exchange box roof center, and second solenoid electric valve 12 is close Pressure sensor setting can be accurate since the pressure of center position is more uniform and close second solenoid electric valve 12 Measure the pressure near the second solenoid electric valve 12.
Battery 11 is installed outside the heat exchange box 15, the positive and negative anodes of the battery 11 pass through respectively electric wire 9, 10 output connections corresponding with generator 8 are connected, and the rotation axis 7 of the generator 8 is connected with impeller 6,6, the impeller Position directly above is exported in the second solenoid electric valve 12, is preferably located on 10cm- right above the outlet of the second solenoid electric valve 12 The position of 12cm, advantage are that nitrogen is capable of forming relatively stable air motion, and the rotation of impeller 6 is more smooth.
A kind of heat exchange using liquid nitrogen-power generation integrated control method of the invention, comprising the following steps:
Step 1: liquid nitrogen liquid level in the first liquid level sensor 19 detection heat exchange box 15, when liquid nitrogen liquid level is low in heat exchange box 15 When the first liquid level sensor 19, the first liquid level sensor 19 transmits a signal to electronic control unit ECU21, and electronic control is single First ECU21 issues signal and controls the unlatching of the first solenoid electric valve 4, and control liquid nitrogen pump 2 is started to work, and liquid nitrogen passes through liquid nitrogen pipeline 3 It is transported in heat exchange box 15 from high pressure storage nitrogen tank.As liquid nitrogen is constantly added into, liquid nitrogen liquid level constantly rises in heat exchange box 15, when When liquid nitrogen liquid level is more than the second liquid level sensor 22, the second liquid level sensor 22 transmits a signal to electronic control unit ECU21. Electronic control unit ECU21 issues signal and controls the closing of the first solenoid electric valve 4, and control liquid nitrogen pump 2 stops working.Heat exchange Fluid (gas, liquid) is entered in heat exchange box 15 by heat exchanging pipe entrance 20, and by 13 outflow heat exchange box 15 of heat exchanging pipe outlet. The fluid (gas, liquid) of heat exchange released at 18 tube wall of heat exchanging pipe thermal temperature reduction, heat exchange fluid (gas, Liquid) release heat absorbed by liquid nitrogen, liquid nitrogen temperature increase and volume expansion become gaseous state, pressure is continuous in heat exchange box 15 It increases.Temperature sensor 14 persistently detects fluid (gas, liquid) temperature of heat exchange, if temperature is not for fluid (gas, liquid) It is reduced to setting value, pressure in 5 real-time monitoring heat exchange box 15 of pressure sensor, and transmits a signal to electronic control unit ECU21.When pressure reaches setting high pressure in the surveyed heat exchange box 15 of pressure sensor 5, such as: when 3bar, electronic control unit ECU21 It issues signal and controls the second solenoid electric valve 12 opening.15 mesohigh nitrogen of heat exchange box is changed by the outflow of the second solenoid electric valve 12 Hot tank 15, high pressure nitrogen drive impeller 6 to rotate, and impeller 6 drives rotation axis 7 to rotate, and rotation axis 7 drives generator 8 to generate electricity, and are sent out Power storage out is in battery 11.As high pressure nitrogen flows out heat exchange box 15, pressure is gradually decreased in heat exchange box 15, when changing Pressure is reduced to setting low pressure in hot tank 15, such as: when 1.5bar, electronic control unit ECU21 issues signal and controls the second electromagnetism Control valve 12 is closed.If fluid (the gas, liquid) temperature that temperature sensor 14 detects in this process is lower than setting value, All processes are then interrupted, step 3 is directly transferred to.
Step 2: temperature sensor 14 detects fluid (gas, liquid) temperature of heat exchange, while the first liquid level sensor Liquid nitrogen liquid level in 19 detection heat exchange box 15;If liquid nitrogen liquid level is lower than the first liquid level sensor 19 in heat exchange box 15, step is repeated One, if the fluid temperature (F.T.) that temperature sensor 14 detects in the process is reduced to setting value, it is transferred to step 3;If heat exchange box 15 When middle liquid nitrogen liquid level is higher than the first liquid level sensor 19, fluid continues to exchange heat with liquid nitrogen, until what temperature sensor 14 detected Fluid temperature (F.T.) is reduced to setting value, is transferred to step 3;
Step 3: electronic control unit ECU21 control second solenoid valve 12 is opened, the nitrogen of expanded by heating in heat exchange box 15 Discharge, the rotation power generation of impeller 6.Electronic control unit ECU21 controls third solenoid valve 17 and opens, remaining liquid nitrogen in heat exchange box It is discharged outside in environment, then electronic control unit ECU21 controls third solenoid valve 17 and closes, electronic control unit ECU21 It controls second solenoid valve 12 to close, fluid (gas, liquid) temperature of heat exchange in heat exchanging pipe 18 is thus avoided to continue to reduce.
Step 4: temperature sensor 14 persistently detects fluid (gas, liquid) temperature of heat exchange, when the fluid of heat exchange When (gas, liquid) temperature is higher than setting value, repeat Step 1: two, three, four.

Claims (6)

1. a kind of heat exchange-power generation integrated system using liquid nitrogen, including electronic control unit ECU, it is characterised in that: high pressure stores up nitrogen Heat exchange box is inserted by the outlet that liquid nitrogen pipeline is sequentially connected liquid nitrogen pump and the first solenoid electric valve and liquid nitrogen pipeline in tank outlet The liquid nitrogen import at top is arranged;
The heat exchanging pipe of delivery heat transfer fluid, the entrance of the heat exchanging pipe, outlet are installed in the heat exchange box The left and right sides setting of heat exchange box, the entrance of the heat exchanging pipe and the infusion pipeline for being used for delivery heat transfer fluid are stretched out respectively Outlet is connected, and the outlet of the heat exchanging pipe is connected with liquor charging pipeline import, and temperature sensing is housed in heat exchanging pipe exit Device;
It is separately installed with the second solenoid electric valve and pressure sensor on the heat exchange box roof, in the heat exchange box The first liquid level sensor and the second liquid level sensor are separately installed on lower sides and upper portion side wall, in the heat exchange box Bottom face center is equipped with third solenoid valve, is discharged into the external world for remaining liquid nitrogen after the completion of exchanging heat in heat exchange box In environment;
First solenoid electric valve, the second solenoid electric valve, third solenoid valve, the first liquid level sensor, the second liquid level pass Sense, temperature sensor, pressure sensor and liquid nitrogen pump pass through control line respectively and are connected with electronic control unit ECU;
Battery is installed outside the heat exchange box, it is corresponding with generator that the positive and negative anodes of the battery pass through electric wire respectively Output connection be connected, the rotation axis of the generator is connected with impeller, and the impeller is located at the second solenoid electric valve and goes out Mouth position directly above.
2. heat exchange-power generation integrated system according to claim 1 using liquid nitrogen, it is characterised in that: the heat exchanger tube Road is U-typed coil pipe.
3. heat exchange-power generation integrated system according to claim 1 or 2 using liquid nitrogen, it is characterised in that: in heat exchange box Asbestos thermal insulation material is enclosed on outer wall.
4. heat exchange-power generation integrated system according to claim 3 using liquid nitrogen, it is characterised in that: the pressure passes Sensor is located at heat exchange box roof center, and second solenoid electric valve is arranged close to pressure sensor.
5. heat exchange-power generation integrated system according to claim 4 using liquid nitrogen, it is characterised in that: the impeller is set Set the position of the 10cm-12cm right above the second Electromagnetic Control valve outlet.
6. using the heat exchange using liquid nitrogen-power generation integrated control method of one of claim 1-5 system, it is characterised in that: packet Include following steps:
Step 1: liquid nitrogen liquid level in the first liquid level sensor detection heat exchange box, when liquid nitrogen liquid level is lower than the first liquid level in heat exchange box When sensor, the first liquid level sensor transmits a signal to electronic control unit ECU, and electronic control unit ECU issues signal control The unlatching of the first solenoid electric valve is made, control liquid nitrogen pump is started to work, and liquid nitrogen is transported to from high pressure storage nitrogen tank by liquid nitrogen pipeline and is changed In hot tank;As liquid nitrogen is constantly added into, liquid nitrogen liquid level constantly rises in heat exchange box, when liquid nitrogen liquid level is more than the second level sensing When device, the second liquid level sensor transmits a signal to electronic control unit ECU, and electronic control unit ECU issues signal control the One solenoid electric valve is closed, and control liquid nitrogen pump stops working, and the fluid of heat exchange is entered in heat exchange box by heat exchanging pipe entrance, and Outflow heat exchange box is exported by heat exchanging pipe, the fluid of heat exchange releases thermal temperature reduction at heat exchanging pipe tube wall, and heat exchange is used Fluid release heat absorbed by liquid nitrogen, liquid nitrogen temperature increase and volume expansion become gaseous state, pressure is continuous in heat exchange box It increases;Temperature sensor persistently detects the fluid temperature (F.T.) of heat exchange, if fluid temperature (F.T.) is not reduced to setting value, pressure sensor is real When monitoring heat exchange box in pressure, and transmit a signal to electronic control unit ECU;When pressure in the surveyed heat exchange box of pressure sensor Reach setting high pressure, electronic control unit ECU issues signal and controls the second solenoid electric valve opening, and heat exchange box mesohigh nitrogen is logical The second solenoid electric valve outflow heat exchange box is crossed, high pressure nitrogen drives wheel rotation, and impeller drives rotation axis rotation, and rotation axis drives Electrical power generators, the power storage issued is in battery, and as high pressure nitrogen flows out heat exchange box, in heat exchange box, pressure is gradually It reduces, when pressure is reduced to setting low pressure in heat exchange box, electronic control unit ECU issues signal and controls the second solenoid electric valve pass It closes;If the fluid temperature (F.T.) that temperature sensor detects in this process is lower than setting value, all processes are interrupted, are directly transferred to Step 3;
Step 2: the fluid temperature (F.T.) of temperature sensor detection heat exchange, while liquid nitrogen in the first liquid level sensor detection heat exchange box Liquid level;If liquid nitrogen liquid level is lower than the first liquid level sensor in heat exchange box, step 1 is repeated, if temperature sensor in the process The fluid temperature (F.T.) detected is reduced to setting value, is transferred to step 3;If liquid nitrogen liquid level is higher than the first liquid level sensor in heat exchange box When, fluid continues to exchange heat with liquid nitrogen, until the fluid temperature (F.T.) that temperature sensor detects is reduced to setting value, is transferred to step 3;
Step 3: electronic control unit ECU control second solenoid valve is opened, the nitrogen discharge of expanded by heating, is driven in heat exchange box Wheel rotation power generation;Electronic control unit ECU controls third solenoid valve and opens, and remaining liquid nitrogen is discharged outside to environment in heat exchange box In, then electronic control unit ECU controls third solenoid valve and closes, and electronic control unit ECU controls second solenoid valve and closes, by This is avoided the fluid temperature (F.T.) of heat exchange in heat exchanging pipe from continuing to reduce;
Step 4: temperature sensor persistently detects the fluid temperature (F.T.) of heat exchange, when the fluid temperature (F.T.) of heat exchange is higher than setting value, It repeats Step 1: two, three, four.
CN201811605966.2A 2018-12-26 2018-12-26 A kind of heat exchange-power generation integrated system and control method using liquid nitrogen Pending CN109578100A (en)

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CN201811605966.2A CN109578100A (en) 2018-12-26 2018-12-26 A kind of heat exchange-power generation integrated system and control method using liquid nitrogen
PCT/CN2019/076342 WO2020133679A1 (en) 2018-12-26 2019-02-27 Heat exchange-power generation integrated system using liquid nitrogen and control method

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CN112556264A (en) * 2020-12-01 2021-03-26 青岛铂迈睿思生物科技有限公司 Overlapping liquid nitrogen refrigerating device

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US4294323A (en) * 1979-09-13 1981-10-13 Cryogenics Unlimited Cryogenic powered vehicle
JP2003120218A (en) * 2001-10-05 2003-04-23 Tadashi Sakamaki Liquefied nitrogen air conditioning and power generation system
CN101158294B (en) * 2006-10-02 2011-05-11 林世鸿 Air (nitrogen) engines system
CN102003360A (en) * 2009-09-03 2011-04-06 林茂森 Natural closed circulation type closed-circuit heat cycle power-generating device
CN104389648B (en) * 2014-09-18 2016-02-24 同济大学 A kind of double-source dynamic system and controlling method thereof

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