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 PDFInfo
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- 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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- Prior art keywords
- heat exchange
- liquid nitrogen
- exchange box
- heat
- liquid level
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 211
- 239000007788 liquid Substances 0.000 title claims abstract description 158
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 105
- 238000010248 power generation Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 8
- 239000013529 heat transfer fluid Substances 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 5
- 238000001802 infusion Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000010425 asbestos Substances 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 16
- 238000001816 cooling Methods 0.000 abstract description 10
- 230000005611 electricity Effects 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants 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
- F01K25/10—Plants 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
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
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.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
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| CN109578100A true CN109578100A (en) | 2019-04-05 |
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| WO (1) | WO2020133679A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260698A (en) * | 2019-05-20 | 2019-09-20 | 华电电力科学研究院有限公司 | A kind of device and method reducing the thermal pollution of gas internal-combustion engine distributed busbar protection |
| CN112628601A (en) * | 2020-12-03 | 2021-04-09 | 蓝箭航天技术有限公司 | Temperature control system for high-pressure gas preparation device and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112556264B (en) * | 2020-12-01 | 2022-05-24 | 青岛铂迈睿思生物科技有限公司 | Overlapping liquid nitrogen refrigerating device |
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| WO2020133679A1 (en) | 2020-07-02 |
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