CN106640241A - Natural gas pipe network pressure energy power generation and refrigeration house method and device - Google Patents
Natural gas pipe network pressure energy power generation and refrigeration house method and device Download PDFInfo
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- CN106640241A CN106640241A CN201611008198.3A CN201611008198A CN106640241A CN 106640241 A CN106640241 A CN 106640241A CN 201611008198 A CN201611008198 A CN 201611008198A CN 106640241 A CN106640241 A CN 106640241A
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- Prior art keywords
- natural gas
- pipe network
- pressure energy
- gas pipe
- control valve
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Classifications
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- 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
-
- 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
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D13/00—Stationary devices, e.g. cold-rooms
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a natural gas pipe network pressure energy power generation and refrigeration house method and device. The device comprises an expansion power generation system and a coolant refrigeration system, wherein the expansion power generation system and the coolant refrigeration system realize power generation and refrigeration integration; the expansion power generation system is that high-pressure natural gas generates power through an expander, then exchanges heat with a coolant, and enters an urban gas pipe network; after exchanging heat with low temperature natural gas, the coolant in the coolant system passes through a distributor; and one stream is directly supplied to a high temperature refrigeration house, and the other stream is supplied to a low temperature refrigeration house after being throttled, so as to realize refrigeration house freshness retaining at different temperature levels. According to the device disclosed by the invention, the expander, a power generator and a compressor operate continuously, so that pressure energy of the pipe network is recycled for generating power and driving the compressor to rotate, externally required energy during independent use of the compressor is reduced, and cooling of two refrigeration houses at different temperature levels is realized; and the device has extremely high economical and social benefits.
Description
Technical field
The present invention generates electricity and freezer method and apparatus with regard to a kind of natural gas pipe network pressure energy, and in particular to pipe network natural gas
The integrated apparatus of pressure energy expansion power generation and coolant refrigeration.
Background technology
Long-distance Transmission Pipeline typically adopts high-pressure delivery, needs Jing compressor stations to rise to high-pressure delivery in course of conveying, and
Step-down is then needed to use to user side.Natural gas produces huge ability in pressure reduction, at present effective profit of this portion of energy
With the extensive concern for having caused people.
Pressure energy of natural gas is recycled and is changed into mechanical energy and cold energy usually through decompressor.Mechanical energy is usually used in generating electricity
Or connecting shaft is used, cold energy is usually used in ice making, freezer and cooling water air conditioner etc. and commonly uses cold industry.Chinese patent CN102563958A is disclosed
The method and apparatus that a kind of utilization pipe network pressure energy of natural gas generates electricity with ice making, pressure energy of natural gas is reclaimed in the invention to be used to send out
Electricity and refrigeration, the main part of electric energy is for for regulation door station office building and worker's household electricity, remainder then directly to drive
Compression kind of refrigeration cycle ice making, that is, the electric energy for consuming high-quality is used for ice making.Chinese patent CN104863645A discloses a kind of pipe
Net pressure energy generates electricity and cold energy retracting device, a kind of pipe network pressure energy of natural gas and cold recoverable effective utilization system, to
Pressure energy of natural gas in high-pressure natural gas pipeline is reclaimed and is generated electricity and pipe network natural gas cold energy is reclaimed into ice making.This operation pressure
Energy recycle device distinguishes skid with cold energy recycle device, with the structural advantages such as easy to install, quick detachable, easy care,
The stable operation of original equipment and new equipment is ensure that, but for the utilization of cold energy is also only limitted to a kind of potential temperature.Chinese patent
CN205025513U discloses a kind of natural gas pipe network pressure energy and reclaims utilization system, and the patent realizes natural gas expansion
Generate electricity and cold energy is reclaimed, the technique is relatively complicated, and for the recycling of cold energy is only limitted to ice making, there is great limitation
Property.Above-mentioned technique reclaims generating to natural gas pipe network pressure energy and cold energy is reclaimed and is described for ice making, but for refrigeration
The application of freezer especially many potential temperature freezers does not carry out Associated.
In view of this, prior art still suffers from certain deficiency.
The content of the invention
In order to overcome the shortcomings of above-mentioned technique, the invention provides a kind of natural gas pipe network pressure energy is used to generate electricity and freezer
Method and apparatus, recycling pipe network pressure energy carries out electricity generation grid-connecting, and connecting shaft drives compressor running while generating, is realizing
Pipe network pressure energy drives compressor operation while generating, reduces the energy provided needed for outside when compressor is used alone
Consumption；Simultaneously the device realizes the cooling of the freezer of two kinds of different potential temperatures, greatly adapts to the demand in market.
The present invention realizes that the technical scheme of above-mentioned purpose is：
A kind of natural gas pipe network pressure energy is used to generate electricity and freezer device, wherein, including expansion power generation system and refrigerant system
Cooling system；
The expansion system includes being connected to control valve (1) between high pressure pipe network and low-pressure pipe network in turn by pipeline,
Flowmeter (2), decompressor (3), heat exchanger (17), recuperator (18), control valve (4) is connected to also having after decompressor (3)
Twin shaft generator (5), transformation synchronized (6)；
The coolant refrigeration system is in turn connected to form refrigerant circulation circuit by pipeline, and wherein circulation line is flowed through successively
Regulating valve (9), heat exchanger (17), current divider (10), control valve (11), High Temperature Refrigeratory (12), control valve (15), flowmeter
(16)；In addition all the way coolant refrigeration circulation flows through successively flow divider (10) by pipeline, choke valve (13), low-temperature cold store (14),
Compressor (8), control valve (15), flowmeter (16)；Two-way coolant refrigeration pipeline merges to form loop in surge tank (7) place；
Preferably, a kind of described natural gas pipe network pressure energy is used to generate electricity and freezer device, wherein：The decompressor is
Turbo-expander, screw expander；
Preferably, a kind of described natural gas pipe network pressure energy is used to generate electricity and freezer device, wherein：The transformation synchronization
Device is three phase-change pressure synchronizeds；
Preferably, a kind of described natural gas pipe network pressure energy is used to generate electricity and freezer device, wherein：The twin shaft generates electricity
Machine is flame proof magneto；
Preferably, a kind of described natural gas pipe network pressure energy is used to generate electricity and freezer device, wherein：The heat exchanger is
Shell-and-tube heat exchanger, high temperature refrigerant walks shell side, and the cryogenic natural gas after expansion walk tube side；
Preferably, a kind of described natural gas pipe network pressure energy is used to generate electricity and freezer device, wherein：Compressor is turbine
The conventional compact equipment such as compressor or helical-lobe compressor；
Preferably, a kind of described natural gas pipe network pressure energy is used to generate electricity and freezer device, wherein：It is natural after expansion
After refrigerant heat exchange after gas and compression, Jing current dividers are divided into two-way, all the way directly to High Temperature Refrigeratory cooling, another road warp knuckle stream valve
Low-temperature cold store cooling is given after expansion, freezer of the coolant refrigeration system comprising two kinds of different potential temperatures is made, and can be according to actual conditions
Adjustment；
Preferably, a kind of described natural gas pipe network pressure energy is used to generate electricity and freezer device, wherein：The refrigerant is
R404a、R134a、R22、CO2Etc. conventional refrigerant；
Preferably, a kind of described natural gas pipe network pressure energy is used to generate electricity and freezer device, wherein：After the decompressor
Connection twin shaft generator, connecting shaft drives generator and compressor；
A kind of natural gas pipe network pressure energy is used to generate electricity and freezer method, is used for using described natural gas pipe network pressure energy
Generate electricity and freezer device, it is characterised in that methods described comprises the steps：
S100, high-pressure natural gas flow through the first control valve (1), first flowmeter, decompressor (3) expansion power generation, after expansion
Natural gas temperature reduce, expansion power generation part by transformation synchronized (6) for exporting, while drive compressor (8)；
Natural gas after expansion is exchanged heat with the refrigerant in heat exchanger (17), adds the natural gas Jing recuperators after heat exchange
After heat, temperature reaches requirement, then enters pipeline network of fuel gas in city through the second control valve (4)；
S200, the cold-producing medium of heat exchanger is flowed through through heat exchanger (17), then flow through (10) current divider and be divided into two-way, all the way
Flow through the 3rd control valve (11), High Temperature Refrigeratory (12), the 4th control valve (15), second flowmeter (16), surge tank (7)；It is another
Road flows through choke valve (13), low-temperature cold store (14), compressor (8), the 4th control valve, second flowmeter (16), then with first
Road cold-producing medium is mixed into surge tank (7), is flowed subsequently through the 5th control valve (9) and is flowed through heat exchanger (17) together with expansion
Natural gas after generating is exchanged heat.
The present invention has compared with the prior art following excellent effect:
1st, energy effectively utilizes are realized.The present invention has reclaimed the pressure energy wasted in script natural gas line；Secondly expand
Cryogenic natural gas after cooling exchange heat with the refrigerant after compression in shell-and-tube heat exchanger, have not only saved to be lifted in original technique and have adjusted
Energy and equipment after pressure spent by the temperature of cryogenic natural gas, and also save the cold needed for refrigerant ice making.
2nd, energy utilization rate is high, it is possible to achieve the freezer cooling of different potential temperatures.By decompressor, generator and compressor
Shaft coupling, realizes expansion power generation and compression refrigerating integrated, depending on the size effectively utilizes electric energy of output work, greatly promotes Integrated Energy
Utilization rate；Secondly the freezer of two kinds of different potential temperatures can be realized in the device, the cold of different food products, seafood or equipment can be realized
Freeze preservation, greatly adapt to the demand in market.
3rd, technological process is simple, and security and stability is high.By the use of refrigerating medium as cold Transfer Medium, natural gas is reclaimed in classification
Cold energy after expansion, while also ensure that natural gas pressure regulating station and pressure energy of natural gas reclaim the safety and stability of utilization system
Property.
4th, it is easy to spread to use.The technique is capable of achieving to generate electricity and refrigerating integrated, and technological process is simple.Can build in cold city
Where field demand is larger, with good Social benefit and economic benefit.
Description of the drawings
Fig. 1 is the schematic diagram that the natural gas pipe network pressure energy of the present invention is used for generating and freezer device.
Fig. 2 is the schematic flow sheet that the natural gas pipe network pressure energy of the present invention is used for generating and freezer method.
Wherein 1-the first control valve, 2-first flowmeter, 3-decompressor, the 4-the second control valve, 5-generator, 6-
Transformation synchronized, 7-surge tank, 8-compressor, the 9-the five control valve, 10-current divider, the 11-the three control valve, 12-high
Warm freezer, 13-choke valve, 14-low-temperature cold store, the 15-the four control valve, 16-second flowmeter, 17-heat exchanger, 18-
Recuperator.
Specific embodiment
It is described further with reference to example and process chart (see Fig. 1).As shown in figure 1, a kind of gas distributing system
Pressure energy generates electricity and freezer method and apparatus, including decompressor electricity generation system and coolant refrigeration system；
The expansion system includes control valve 1, the stream being connected in turn by pipeline between high pressure pipe network and low-pressure pipe network
Gauge 2, decompressor 3, heat exchanger 17, recuperator 18, control valve 4, the wherein rear end of decompressor 3 is also connected with twin shaft generator 5, transformation
Synchronized 6；One axle of the output shaft connection twin shaft generator 6 of the turbo-expander 3, the electric power of the twin shaft generator 6 is supplied
Place equipment is used or outwards powered by transformation synchronized；
The coolant refrigeration system is in turn connected to form refrigerant circulation circuit by pipeline, and wherein circulation line is flowed through successively
Heat exchanger 17, the control valve 11 of current divider the 10, the 5th, the control of high temperature storehouse the 12, the 4th valve 15, second flowmeter 16, surge tank 7；Separately
The outer circulation of coolant refrigeration all the way flows through successively current divider 10, choke valve 13, Freezing room 14, compressor 8, the 4th control by pipeline
Valve 15, second flowmeter 16, surge tank 7 forms the freezer of two kinds of different potential temperatures.
Further, the twin shaft generator 5 is flame proof magneto, and safe and reliable, stability is high.
Further, the transformation synchronized 6 is three phase-change pressure synchronizeds, with small volume, it is lightweight, safeguard it is simple,
Reliable the advantages of.
Further, the heat exchanger is shell-and-tube heat exchanger 17, and the cryogenic natural gas after expansion flow through heat exchanger and Jing
The high temperature refrigerant of compressor compresses is exchanged heat, and high temperature refrigerant walks shell, and natural after expansion makes tube layer leave with rage, with structure letter
The advantages of list, low cost, good effect of heat exchange.
Further, the decompressor 3 is turbo-expander, screw expander, specifically need to be selected according to different operating modes
Suitable decompressor.
Further, freezer of the described coolant refrigeration system comprising two kinds of different potential temperatures, can realize different food products, sea
Fresh or equipment freezing, can meet the cold product of different potential temperatures needs cold requirement, greatly adapts to the demand in market.
Further, the refrigerant is R404a, R134a, R22, CO2Etc. conventional refrigerant.
Further, the decompressor is followed by twin shaft generator, and connecting shaft drives compressor, is realizing pipe network pressure energy generating
While drive compressor operation, reduce be used alone compressor when outside needed for provide energy consumption.
It is used to generate electricity and freezer method using the natural gas pipe network pressure energy of described device, as shown in Fig. 2 including following step
Suddenly：
S100, high-pressure natural gas flow through the first control valve 1, first flowmeter 2, the expansion power generation of decompressor 3, the day after expansion
So temperature degree is reduced, and expansion power generation part is used to export by transformation synchronized 6, while driving compressor 8；
Natural gas after expansion is exchanged heat with the refrigerant in heat exchanger 17, heats the natural gas Jing recuperators after heat exchange
Afterwards, temperature reaches requirement, then enters pipeline network of fuel gas in city through the second control valve 4；
The cold-producing medium of S200, Jing heat exchanger then flows through 10 current dividers and is divided into two-way through heat exchanger 17, and is flowed through all the way
Three control valves 11, High Temperature Refrigeratory 12, the 4th control valve 15, second flowmeter 16, surge tank 7；Another road flows through choke valve 13, low
Then warm freezer 14, compressor 8, the 4th control valve, second flowmeter 16 mixes into buffering with first via cold-producing medium
Tank 7, flows subsequently through the 5th control valve 9 and flows through heat exchanger 17 together and exchanged heat with the natural gas after expansion power generation.
Relevant parameter is 20 DEG C, 4.0MPa, 50000Nm before certain station natural gas pressure regulating3/ h, gas pressure is after pressure regulation
1.2MPa.The ground has periphery to have Pork and melon and fruit class to need cold industry, needs storage capacity to be 5000m3, potential temperature is -5 DEG C or so cold
Storehouse and storage capacity are 5000m3, it is fresh-keeping that potential temperature is that -30 DEG C or so of freezer carries out cold insulation.
Conceptual design is carried out according to above-mentioned project background, cold-producing medium used is R404a in this programme, decompressor 3 is selected
Turbo-expander, expansion efficiency is about 0.78, and from the asynchronous generator of explosion-proof type, heat exchanger 17 is that shell-and-tube is special to generator 5
Type equipment, compressor used 7 is screw compressor, and the mechanical efficiency of compressor is 0.78, and specific embodiment is as follows.
Existing 30000Nm320 DEG C of the high pressure pipe network natural gas of/h, 4.0MPa natural gas Jing turbo-expanders expansion 3 to
1.2MPa, the temperature of natural gas is reduced to -45 DEG C；- 45 DEG C of cryogenic natural gas are changed with the cold-producing medium R404a in heat exchanger 17
Heat, after the temperature of natural gas is increased to -8 DEG C, be incorporated to after requirement city low-pressure fuel gas pipe network through recuperator 18, reaching；1
DEG C, the refrigerant R404a of 0.5MPa, 139000kg/h, the temperature after heat exchange be -7 DEG C, then flow through current divider 10, the first via is
8757kg/h, through the 3rd valve 11 is controlled, and subsequently gives -5 DEG C of coolings of High Temperature Refrigeratory 12；Another pipeline is 5143kg/h, Jing Guojie
Temperature can reach -32 DEG C or so after stream expansion, then to -30 DEG C of coolings of low-temperature cold store 14, subsequently after compressor 8 compresses,
Pressure increases to 0.5MPa, and the refrigerant of subsequent and first via pipeline is mixed in surge tank, and mixed pressure is
0.5MPa, temperature flow subsequently through regulating valve 9 for 1 DEG C, and through heat exchanger 17 whole loop is formed.
Heat exchange area in whole technique needed for heat exchanger is 7180m2, first via cold-producing medium can provide the cold of 442kW,
The freezer that 5000t potential temperatures are -5 DEG C can be supplied；Second road cold-producing medium can provide the cold of 231kW, be available for -30 DEG C of 5000t potential temperatures
Freezer storage it is fresh-keeping.
This technique generates electricity with natural gas pipe network pressure energy and freezer method and apparatus generates electricity and can produce 1220kW electric energy, presses
Contracting machine needs wasted work 26kW.With whole year operation time 8600h, 0.8 yuan/kWh of the electricity charge is calculated, and the total energy-saving benefit of this technique is 8,200,000
Unit/year.
The above embodiment of the present invention is only clear explanation example of the present invention, and is not the reality to the present invention
Apply the restriction of mode.For the those of ordinary skill in the field, other can also be made on the basis of the above description
The change or variation of multi-form.All any modification, equivalent and improvement made within the spirit and principles in the present invention
Deng should be included within the protection domain of the claims in the present invention.
Claims (10)
1. a kind of natural gas pipe network pressure energy is used to generate electricity and freezer device, it is characterised in that including expansion power generation system and cold
Matchmaker's refrigeration system；
The expansion system includes being connected to control valve (1) between high pressure pipe network and low-pressure pipe network, flow in turn by pipeline
Meter (2), decompressor (3), heat exchanger (17), recuperator (18), control valve (4) is connected to after decompressor (3) and also has twin shaft
Generator (5), transformation synchronized (6)；
The coolant refrigeration system is in turn connected to form refrigerant circulation circuit by pipeline, and wherein circulation line flows through successively regulation
Valve (9), heat exchanger (17), current divider (10), control valve (11), High Temperature Refrigeratory (12), control valve (15), flowmeter (16)；Separately
The outer circulation of coolant refrigeration all the way flows through successively flow divider (10), choke valve (13), low-temperature cold store (14), compressor by pipeline
(8), valve (15), flowmeter (16) are controlled；Two-way coolant refrigeration pipeline merges to form loop in surge tank (7) place.
2. a kind of natural gas pipe network pressure energy according to claim 1 is used to generate electricity and freezer device, it is characterised in that：Institute
Decompressor is stated for turbo-expander, screw expander.
3. a kind of natural gas pipe network pressure energy according to claim 1 is used to generate electricity and freezer device, it is characterised in that：Institute
Transformation synchronized is stated for three phase-change pressure synchronizeds.
4. a kind of natural gas pipe network pressure energy according to claim 1 is used to generate electricity and freezer device, it is characterised in that：Institute
Twin shaft generator is stated for flame proof magneto.
5. a kind of natural gas pipe network pressure energy according to claim 1 is used to generate electricity and freezer device, it is characterised in that：Institute
It is shell-and-tube heat exchanger to state heat exchanger, and high temperature refrigerant walks shell side, and the cryogenic natural gas after expansion walk tube side.
6. a kind of natural gas pipe network pressure energy according to claim 1 is used to generate electricity and freezer device, it is characterised in that：Pressure
Contracting machine is the conventional compact equipment such as turbocompressor or helical-lobe compressor.
7. a kind of natural gas pipe network pressure energy according to claim 1 is used to generate electricity and freezer device, it is characterised in that：It is swollen
After the refrigerant heat exchange after natural gas and compression after swollen, Jing current dividers are divided into two-way, another all the way directly to High Temperature Refrigeratory cooling
Low-temperature cold store cooling is given after the warp knuckle stream valve expansion of road, freezer of the coolant refrigeration system comprising two kinds of different potential temperatures is made, and can root
Adjust according to actual conditions.
8. a kind of natural gas pipe network pressure energy according to claim 1 is used to generate electricity and freezer device, it is characterised in that：Institute
Refrigerant is stated for R404a, R134a, R22, CO2Etc. conventional refrigerant.
9. a kind of natural gas pipe network pressure energy according to claim 1 is used to generate electricity and freezer device, it is characterised in that：Institute
Connection twin shaft generator after decompressor is stated, connecting shaft drives generator and compressor.
10. a kind of natural gas pipe network pressure energy is used to generate electricity and freezer method, using the gas distributing system pressure described in claim 1
Power can be used to generate electricity and freezer device, it is characterised in that methods described comprises the steps：
S100, high-pressure natural gas flow through the first control valve (1), first flowmeter, decompressor (3) expansion power generation, the day after expansion
So temperature degree is reduced, and expansion power generation part passes through transformation synchronized (6) for exporting, while driving compressor (8)；
Natural gas after expansion is exchanged heat with the refrigerant in heat exchanger (17), heats the natural gas Jing recuperators after heat exchange
Afterwards, temperature reaches requirement, then enters pipeline network of fuel gas in city through the second control valve (4)；
S200, the cold-producing medium of heat exchanger is flowed through through heat exchanger (17), then flow through (10) current divider and be divided into two-way, flow through all the way
3rd control valve (11), High Temperature Refrigeratory (12), the 4th control valve (15), second flowmeter (16), surge tank (7)；Another road stream
Warp knuckle stream valve (13), low-temperature cold store (14), compressor (8), the 4th control valve, second flowmeter (16), then with first via system
Cryogen is mixed into surge tank (7), is flowed subsequently through the 5th control valve (9) and is flowed through heat exchanger (17) and expansion power generation together
Natural gas afterwards is exchanged heat.
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|---|---|---|---|
| CN201611008198.3A CN106640241A (en) | 2016-11-16 | 2016-11-16 | Natural gas pipe network pressure energy power generation and refrigeration house method and device |
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|---|---|---|---|
| CN201611008198.3A CN106640241A (en) | 2016-11-16 | 2016-11-16 | Natural gas pipe network pressure energy power generation and refrigeration house method and device |
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Family
ID=58806970
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Cited By (3)
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| CN110185506A (en) * | 2019-05-27 | 2019-08-30 | 西南石油大学 | A kind of natural gas pressure regulating station pressure energy utilization system |
| CN110375454A (en) * | 2019-06-24 | 2019-10-25 | 东南大学 | A kind of pressure energy of natural gas refrigeration system |
| CN110375455A (en) * | 2019-06-24 | 2019-10-25 | 东南大学 | A kind of compressed air energy refrigerated air-conditioning system |
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| CN110375454A (en) * | 2019-06-24 | 2019-10-25 | 东南大学 | A kind of pressure energy of natural gas refrigeration system |
| CN110375455A (en) * | 2019-06-24 | 2019-10-25 | 东南大学 | A kind of compressed air energy refrigerated air-conditioning system |
| CN110375455B (en) * | 2019-06-24 | 2021-05-11 | 东南大学 | Compressed air energy refrigeration air conditioning system |
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Application publication date: 20170510 |
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