CN112524480B - CNG fills dress device based on organic rankine cycle - Google Patents
CNG fills dress device based on organic rankine cycle Download PDFInfo
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- CN112524480B CN112524480B CN202011384263.9A CN202011384263A CN112524480B CN 112524480 B CN112524480 B CN 112524480B CN 202011384263 A CN202011384263 A CN 202011384263A CN 112524480 B CN112524480 B CN 112524480B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/035—High pressure (>10 bar)
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Abstract
The invention belongs to the technical field of natural gas compression filling, and particularly discloses a CNG filling device based on organic Rankine cycle, aiming at solving the problems of increasing the single-tank filling amount of CNG and effectively utilizing heat generated in the CNG filling process. The CNG filling device based on the organic Rankine cycle can compress natural gas in a gas storage tank and then convey the compressed natural gas into the middle tank through the CNG compression system, and can convert heat generated by heating effect during natural gas compression into rotary mechanical energy through the organic Rankine cycle unit so as to drive the first-stage compressor to perform primary compression of the natural gas, so that the CNG can be cooled, the specific volume during CNG filling is reduced, the single-tank filling amount of the CNG is increased, and the heat generated in the CNG filling process is effectively utilized to assist in compressing the natural gas; in addition, the CNG before entering the intermediate tank can be cooled through the refrigerating unit and the cooling liquid circulating system, the single-tank filling amount of the CNG is further increased, and the transportation cost of unit amount of natural gas is reduced.
Description
Technical Field
The invention belongs to the technical field of natural gas compression filling, and particularly relates to a CNG filling device based on organic Rankine cycle.
Background
Aiming at the vehicle and ship transportation of canned natural gas, two main modes are available on the market at present: one is to obtain liquefied natural gas (LNG for short) by deeply cooling and liquefying natural gas, and this way can greatly reduce the volume of natural gas due to the conversion of natural gas from gaseous state to liquid state, and is very convenient for the transportation of vehicles and ships after canning, but because the cost of deep cooling and tank body heat preservation is higher, the application thereof is limited to a certain extent. In the other method, the natural gas is directly compressed to the pressure of 20-25 MPa, and compared with the natural gas at normal pressure, the volume of the natural gas is reduced by 200-250 times to obtain the compressed natural gas (CNG for short). Compared with the prior art, although LNG has smaller specific volume and higher energy density which is 2-3 times that of CNG, the CNG does not need to be subjected to deep cooling liquefaction and any heat preservation measures, and has lower storage cost and use cost, thereby having obvious advantages and wide market.
However, according to the law of thermodynamics, the temperature of CNG rises by tens of degrees due to the failure of CNG to dissipate heat efficiently in time during the rapid compression process, and a large amount of low-grade heat energy is generated, i.e. the so-called temperature effect occurs. In addition, during storage and transportation, the CNG in the tank body is slowly cooled to the ambient temperature, and the temperature and the pressure of the gas are positively correlated when the volume is fixed, so that the pressure of the CNG is gradually reduced to a value lower than that required under normal conditions, and finally, the CNG filled quickly is insufficient in filling pressure, insufficient in filling amount and high in unit mass transportation cost. While slow charging may alleviate the above-mentioned deficiencies, slow charging can severely slow the filling rate and may not eliminate the problem of temperature rise during filling.
In order to increase the filling amount of CNG, the invention patent application with chinese patent publication No. CN105987275A discloses a natural gas filling method, which cools natural gas by a cooling device before filling the natural gas into a vehicle-mounted gas cylinder, wherein the cooling range of the natural gas temperature is 40 ℃ to 0 ℃ lower than the ambient temperature. Although CNG is forcibly cooled to the ambient temperature before entering the tank body, the specific volume of the CNG is reduced and the density of the CNG is increased after the CNG is cooled, so that the filling amount of the CNG with the same tank body volume can be increased, and the transportation cost of the CNG per unit weight can be reduced; however, if only a large amount of heat generated during the filling of CNG is absorbed, a great deal of heat is wasted.
Disclosure of Invention
The invention provides a CNG filling device based on organic Rankine cycle, and aims to solve the problems of increasing the single-tank filling amount of CNG and effectively utilizing heat generated in the CNG filling process.
The technical scheme adopted by the invention for solving the technical problems is as follows: the CNG filling device based on the organic Rankine cycle comprises a refrigerating unit, an organic Rankine cycle unit, a cooling liquid circulation system and a CNG compression system;
the refrigerating unit comprises a refrigerating unit evaporator;
the organic Rankine cycle unit comprises a working medium pump, an ORC evaporator, an expansion machine and an ORC condenser;
the cooling liquid circulating system comprises a cooling liquid pump and a CNG cooler;
the CNG compression system comprises a gas storage tank, a first-stage compressor, a second-stage compressor, a motor and a middle tank;
the working medium outlet of the working medium pump is connected with the working medium inlet of the ORC evaporator, the working medium outlet of the ORC evaporator is connected with the working medium inlet of the expander, the working medium outlet of the expander is connected with the working medium inlet of the ORC condenser, and the working medium outlet of the ORC condenser is connected with the working medium inlet of the working medium pump; the driving end of the expansion machine is in transmission connection with the first-stage compressor;
the liquid outlet of the cooling liquid pump is connected with the liquid inlet of the CNG cooler, the liquid outlet of the CNG cooler is connected with the liquid inlet of the ORC condenser, the liquid outlet of the ORC condenser is connected with the liquid inlet of the refrigeration unit evaporator, and the liquid outlet of the refrigeration unit evaporator is connected with the liquid inlet of the cooling liquid pump;
the gas outlet of the gas storage tank is connected with the gas inlet of the first-stage gas compressor, the gas outlet of the first-stage gas compressor is connected with the gas inlet of the second-stage gas compressor, the gas outlet of the second-stage gas compressor is connected with the CNG inlet of the ORC evaporator, the CNG outlet of the ORC evaporator is connected with the CNG inlet of the CNG cooler, and the CNG outlet of the CNG cooler is connected with the gas inlet of the middle tank; and the driving end of the motor is in transmission connection with the wide-port side shaft end of the second-stage compressor.
Further, the refrigerating unit also comprises a compressor, a condenser of the refrigerating unit and a throttling device;
the refrigerant outlet of the compressor is connected with the refrigerant inlet of the condenser of the refrigerating unit, the refrigerant outlet of the condenser of the refrigerating unit is connected with the refrigerant inlet of the throttling device, the refrigerant outlet of the throttling device is connected with the refrigerant inlet of the evaporator of the refrigerating unit, and the refrigerant outlet of the evaporator of the refrigerating unit is connected with the refrigerant inlet of the compressor.
Furthermore, a cooling fan is arranged on one side of the condenser of the refrigerating unit, and an air outlet of the cooling fan faces to a heat dissipation part of the condenser of the refrigerating unit.
Further, the compressor, the condenser of the refrigerating unit, the throttling device and the evaporator of the refrigerating unit are connected together in a circulating mode through a refrigerant pipeline.
Further, the working medium pump, the ORC evaporator, the expansion machine and the ORC condenser are connected together in a circulating mode through an ORC working medium pipeline.
Further, the cooling liquid pump, the CNG cooler, the ORC condenser and the refrigerating unit evaporator are connected together in a circulating mode through cooling liquid pipelines.
Further, the wide-port side shaft end of the expansion machine is in transmission connection with the wide-port side shaft end of the first-stage compressor through a coupler.
Furthermore, the intermediate tank is provided with at least two CNG quick-charging joints.
Further, the gas storage tank, the first-stage compressor, the second-stage compressor, the ORC evaporator, the CNG cooler and the intermediate tank are sequentially connected through a CNG conveying pipeline.
Further, the refrigerating unit evaporator, the ORC condenser and the CNG cooler are all counter-flow heat exchangers.
The invention has the beneficial effects that: the device can compress natural gas in a gas storage tank through a CNG compression system and then convey the compressed natural gas into a middle tank, and can convert heat generated by a warming effect during natural gas compression into rotating mechanical energy through an organic Rankine cycle unit so as to drive a first-stage compressor to carry out primary compression on the natural gas, so that the CNG can be cooled before entering the middle tank, the specific volume during CNG filling is reduced, the single-tank filling amount of the CNG is increased, and the heat generated in the CNG filling process is effectively utilized to assist in compressing the natural gas; the natural gas is further compressed by the second-stage compressor driven by the motor, so that the continuous compression of the natural gas can be realized, the continuous mechanical energy output of the organic Rankine cycle unit can be further realized, and the electric energy consumed in the natural gas compression and filling process can be reduced; in addition, the CNG before entering the intermediate tank can be cooled through the refrigerating unit and the cooling liquid circulating system, the single-tank filling amount of the CNG is further increased, and the transportation cost of unit amount of natural gas is reduced.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
labeled as: the system comprises a refrigerating unit 10, a compressor 11, a refrigerating unit condenser 12, a cooling fan 121, a throttling device 13, a refrigerating unit evaporator 14, a refrigerant pipeline 15, an organic Rankine cycle unit 20, a working medium pump 21, an ORC evaporator 22, an expansion machine 23, an ORC condenser 24, an ORC working medium pipeline 25, a cooling liquid circulating system 30, a cooling liquid pump 31, a CNG cooler 32, a cooling liquid pipeline 33, a CNG compression system 40, an air storage tank 41, a first-stage compressor 42, a coupling 421, a second-stage compressor 43, an electric motor 44, an intermediate tank 45, a CNG quick-charging joint 451 and a CNG conveying pipeline 46.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the CNG filling apparatus based on the organic rankine cycle includes a refrigeration unit 10, an organic rankine cycle unit 20, a cooling liquid circulation system 30, and a CNG compression system 40;
the refrigeration unit 10 includes a refrigeration unit evaporator 14;
the organic Rankine cycle unit 20 comprises a working medium pump 21, an ORC evaporator 22, an expansion machine 23 and an ORC condenser 24;
the cooling liquid circulation system 30 includes a cooling liquid pump 31 and a CNG cooler 32;
the CNG compression system 40 includes an air tank 41, a first stage compressor 42, a second stage compressor 43, a motor 44, and an intermediate tank 45;
the working medium outlet of the working medium pump 21 is connected with the working medium inlet of the ORC evaporator 22, the working medium outlet of the ORC evaporator 22 is connected with the working medium inlet of the expansion machine 23, the working medium outlet of the expansion machine 23 is connected with the working medium inlet of the ORC condenser 24, and the working medium outlet of the ORC condenser 24 is connected with the working medium inlet of the working medium pump 21; the driving end of the expansion machine 23 is in transmission connection with the first-stage compressor 42;
a liquid outlet of the cooling liquid pump 31 is connected with a liquid inlet of a CNG cooler 32, a liquid outlet of the CNG cooler 32 is connected with a liquid inlet of an ORC condenser 24, a liquid outlet of the ORC condenser 24 is connected with a liquid inlet of a refrigerating unit evaporator 14, and a liquid outlet of the refrigerating unit evaporator 14 is connected with a liquid inlet of the cooling liquid pump 31;
an air outlet of the air storage tank 41 is connected with an air inlet of a first-stage compressor 42, an air outlet of the first-stage compressor 42 is connected with an air inlet of a second-stage compressor 43, an air outlet of the second-stage compressor 43 is connected with a CNG inlet of the ORC evaporator 22, a CNG outlet of the ORC evaporator 22 is connected with a CNG inlet of the CNG cooler 32, and a CNG outlet of the CNG cooler 32 is connected with an air inlet of the intermediate tank 45; the driving end of the motor 44 is in transmission connection with the wide-port side shaft end of the second-stage compressor 43.
Wherein, the refrigerating unit 10 is generally filled with a refrigerant, the cooling liquid in the cooling liquid circulation system 30 is cooled down through the refrigeration cycle of the refrigerant, and the cold energy transmission process is realized in the refrigerating unit evaporator 14; the refrigeration unit 10 can be of various types, for example: refrigeration air conditioners, air coolers, cooling towers and the like; preferably, as further shown in fig. 1, the refrigeration unit 10 further includes a compressor 11, a refrigeration unit condenser 12, and a throttling device 13; a refrigerant outlet of the compressor 11 is connected to a refrigerant inlet of a refrigeration unit condenser 12, a refrigerant outlet of the refrigeration unit condenser 12 is connected to a refrigerant inlet of a throttling device 13, a refrigerant outlet of the throttling device 13 is connected to a refrigerant inlet of a refrigeration unit evaporator 14, and a refrigerant outlet of the refrigeration unit evaporator 14 is connected to a refrigerant inlet of the compressor 11.
In addition to the above, in order to improve the cooling effect, as shown in fig. 1, a cooling fan 121 is generally provided on one side of the refrigeration unit condenser 12, and an air outlet of the cooling fan 121 faces a heat radiation portion of the refrigeration unit condenser 12. The cooling air blown out by the cooling fan 121 cools the heat radiation portion of the refrigeration unit condenser 12, so that the refrigerant is cooled quickly.
Specifically, the compressor 11, the refrigeration unit condenser 12, the throttling device 13 and the refrigeration unit evaporator 14 are circularly connected together through a refrigerant pipeline 15.
Organic Rankine Cycle (ORC) technology is a technology that utilizes the characteristic that some organic matters have relatively high pressure at a low temperature, and can efficiently absorb low-grade heat energy for generating mechanical energy. The device can be with the heat conversion that the effect produced because of rising the temperature when the natural gas compression becomes rotation mechanical energy through organic rankine cycle unit 20, makes the CNG cooling and supplementary CNG, and concrete process is: the pressure of the organic working medium in the organic Rankine cycle unit 20 is increased under the driving action of the working medium pump 21, the organic working medium firstly passes through the ORC evaporator 22 to exchange heat with high-temperature CNG passing through the ORC evaporator 22 at the same time, the heat generated in the CNG compression process is absorbed and then the organic working medium is changed into high-temperature and high-pressure organic working medium steam, and the CNG can be preliminarily cooled in the process; then, the high-temperature and high-pressure organic working medium steam pushes an impeller of the expansion machine 23 to rotate through the expansion machine 23, so that the heat energy is converted into the rotation mechanical energy and drives the first-stage compressor 42 to work, and the first-stage compressor is used for realizing primary compression in CNG production; the high-temperature and high-pressure organic working medium steam is converted into liquid organic working medium and organic working medium exhaust steam through the expansion machine 23, the liquid organic working medium and the organic working medium exhaust steam are cooled and liquefied through the ORC condenser 24, the liquefied organic working medium flows to the working medium pump 21 again, and the cycle is repeated.
The working medium pump 21 is used for providing driving power for the organic working medium to circularly work in the organic Rankine cycle unit 20, the ORC evaporator 22 is used for enabling the organic working medium and high-temperature CNG to perform heat exchange to be converted into high-temperature and high-pressure organic working medium steam, and the expansion machine 23 is used for converting the heat energy of the high-temperature and high-pressure organic working medium steam into mechanical energy to drive the first-stage compressor 42 to work.
Specifically, the working fluid pump 21, the ORC evaporator 22, the expander 23, and the ORC condenser 24 are cyclically connected together by an ORC working fluid line 25.
The CNG filling device based on the organic rankine cycle can absorb a large amount of low-grade heat energy generated in the compression process of the CNG through the ORC evaporator 22, reduce the cooling input required for cooling the CNG, and reduce the power consumption of the cooling liquid circulation system 30, because although the cooling liquid circulation system 30 needs to cool the heat released by the ORC condenser 24 in addition to the CNG discharged from the ORC evaporator 22 to the ambient temperature, a part of the heat originally absorbed by the cooling liquid circulation system 30 is absorbed by the ORC evaporator 22, and because the heat absorbed by the ORC evaporator 22 is always greater than the heat released by the ORC condenser 24, the difference is the mechanical energy output of the organic rankine cycle unit 20 and the inevitable loss, that is, compared with the direct cooling without passing through the organic rankine cycle unit 20, the value of the cooling input reduced by the cooling liquid circulation system 30 is substantially equal to the value of the mechanical energy output of the organic rankine cycle unit 20, the power consumption of the coolant circulation system 30 is reduced.
The working process of the cooling liquid circulation system 30 is as follows: the cooling liquid pump 31 provides power, so that when the cooling liquid cooled in the refrigeration unit evaporator 14 flows through the CNG cooler 32, the residual heat generated in the compression process of the CNG and not absorbed by the organic Rankine cycle unit 20 is absorbed, the CNG is further cooled, then the cooling liquid flows through the ORC condenser 24 again, the heat released when the organic working medium is liquefied and phase-changed is absorbed, and finally the cooling liquid enters the refrigeration unit evaporator 14 again for cooling, and the cycle is repeated.
The CNG prior to entering the intermediate tank 45 is typically reduced to ambient temperature by the coolant circulation system 30; through reducing CNG to ambient temperature and again through the quick filling of intermediate tank 45, compare with the quick filling of conventional CNG, specific volume when having reduced the CNG filling makes the filling volume obtain the guarantee.
Specifically, the coolant pump 31, CNG cooler 32, ORC condenser 24 and refrigeration unit evaporator 14 are cyclically connected together by a coolant line 33.
The CNG compression system 40 can compress the natural gas in the gas storage tank 41 and then deliver the compressed natural gas into the intermediate tank 45; the gas storage tank 41 is used for storing low-pressure natural gas; the first stage compressor 42 is used for performing primary compression of natural gas, and the first stage compressor 42 is driven by the rotational mechanical energy generated by the expander 23; the second-stage compressor 43 is used for compressing natural gas to a high pressure required for storage and transportation; the motor 44 is used for providing power for the second-stage compressor 43; the intermediate tank 45 is used for temporarily storing CNG, which can convert an intermittent CNG filling process into a continuous filling process; a CNG quick-filling joint 451 for filling CNG in the intermediate tank 45 to various on-board and on-board transport tanks is generally provided on the intermediate tank 45; to improve the efficiency of filling CNG, as further shown in fig. 1, at least two CNG quick fill fittings 451 are typically provided on the intermediate tank 15.
In order to facilitate the transmission connection of the expander 23 and the first-stage compressor 42, as shown in fig. 1, the wide-port-side shaft end of the expander 23 is in transmission connection with the wide-port-side shaft end of the first-stage compressor 42 through a coupling 421.
Specifically, the gas storage tank 41, the first-stage compressor 42, the second-stage compressor 43, the ORC evaporator 22, the CNG cooler 32, and the intermediate tank 45 are connected in sequence through a CNG delivery line 46.
To enhance the heat exchange effect, the refrigeration unit evaporator 14, ORC evaporator 22, ORC condenser 24, and CNG cooler 32 are preferably counter-flow heat exchangers.
The CNG filling device based on the organic Rankine cycle can assist the compression filling of CNG, and is particularly suitable for large CNG filling workstations, so that the organic Rankine cycle unit 20 plays a greater role.
Claims (10)
1. CNG fills device based on organic rankine cycle, its characterized in that: the system comprises a refrigerating unit (10), an organic Rankine cycle unit (20), a cooling liquid circulation system (30) and a CNG compression system (40);
the refrigeration unit (10) includes a refrigeration unit evaporator (14);
the organic Rankine cycle unit (20) comprises a working medium pump (21), an ORC evaporator (22), an expansion machine (23) and an ORC condenser (24);
the cooling liquid circulation system (30) includes a cooling liquid pump (31) and a CNG cooler (32);
the CNG compression system (40) comprises a gas storage tank (41), a first stage compressor (42), a second stage compressor (43), a motor (44) and an intermediate tank (45);
the working medium outlet of the working medium pump (21) is connected with the working medium inlet of the ORC evaporator (22), the working medium outlet of the ORC evaporator (22) is connected with the working medium inlet of the expander (23), the working medium outlet of the expander (23) is connected with the working medium inlet of the ORC condenser (24), and the working medium outlet of the ORC condenser (24) is connected with the working medium inlet of the working medium pump (21); the driving end of the expansion machine (23) is in transmission connection with the first-stage compressor (42);
a liquid outlet of the cooling liquid pump (31) is connected with a liquid inlet of a CNG cooler (32), a liquid outlet of the CNG cooler (32) is connected with a liquid inlet of an ORC condenser (24), a liquid outlet of the ORC condenser (24) is connected with a liquid inlet of a refrigerating unit evaporator (14), and a liquid outlet of the refrigerating unit evaporator (14) is connected with a liquid inlet of the cooling liquid pump (31);
the air outlet of the air storage tank (41) is connected with the air inlet of a first-stage compressor (42), the air outlet of the first-stage compressor (42) is connected with the air inlet of a second-stage compressor (43), the air outlet of the second-stage compressor (43) is connected with the CNG inlet of an ORC evaporator (22), the CNG outlet of the ORC evaporator (22) is connected with the CNG inlet of a CNG cooler (32), and the CNG outlet of the CNG cooler (32) is connected with the air inlet of a middle tank (45); and the driving end of the motor (44) is in transmission connection with the wide-opening side shaft end of the second-stage compressor (43).
2. An organic rankine cycle-based CNG filling apparatus according to claim 1, wherein: the refrigerating unit (10) further comprises a compressor (11), a refrigerating unit condenser (12) and a throttling device (13);
the refrigerant outlet of the compressor (11) is connected with the refrigerant inlet of the condenser (12) of the refrigerating unit, the refrigerant outlet of the condenser (12) of the refrigerating unit is connected with the refrigerant inlet of the throttling device (13), the refrigerant outlet of the throttling device (13) is connected with the refrigerant inlet of the evaporator (14) of the refrigerating unit, and the refrigerant outlet of the evaporator (14) of the refrigerating unit is connected with the refrigerant inlet of the compressor (11).
3. An organic rankine cycle-based CNG filling apparatus according to claim 2, wherein: and a cooling fan (121) is arranged on one side of the refrigerating unit condenser (12), and an air outlet of the cooling fan (121) faces to the heat dissipation part of the refrigerating unit condenser (12).
4. An organic rankine cycle-based CNG filling apparatus according to claim 2, wherein: the compressor (11), the refrigerating unit condenser (12), the throttling device (13) and the refrigerating unit evaporator (14) are connected together in a circulating mode through a refrigerant pipeline (15).
5. An organic rankine cycle-based CNG filling apparatus according to claim 1, wherein: the working medium pump (21), the ORC evaporator (22), the expansion machine (23) and the ORC condenser (24) are circularly connected together through an ORC working medium pipeline (25).
6. An organic rankine cycle-based CNG filling device according to claim 1, wherein: the cooling liquid pump (31), the CNG cooler (32), the ORC condenser (24) and the refrigerating unit evaporator (14) are circularly connected together through a cooling liquid pipeline (33).
7. An organic rankine cycle-based CNG filling device according to claim 1, wherein: and the wide-port side shaft end of the expansion machine (23) is in transmission connection with the wide-port side shaft end of the first-stage compressor (42) through a coupling (421).
8. An organic rankine cycle-based CNG filling apparatus according to claim 1, wherein: and at least two CNG quick-charging joints (451) are arranged on the intermediate tank (45).
9. An organic rankine cycle-based CNG filling apparatus according to any one of claims 1 to 8, wherein: the gas storage tank (41), the first-stage compressor (42), the second-stage compressor (43), the ORC evaporator (22), the CNG cooler (32) and the intermediate tank (45) are sequentially connected through a CNG conveying pipeline (46).
10. An organic rankine cycle-based CNG filling apparatus according to claim 9, wherein: the refrigerating unit evaporator (14), the ORC evaporator (22), the ORC condenser (24) and the CNG cooler (32) are all counter-flow heat exchangers.
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| CN202011384263.9A CN112524480B (en) | 2020-11-30 | 2020-11-30 | CNG fills dress device based on organic rankine cycle |
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| CN202011384263.9A CN112524480B (en) | 2020-11-30 | 2020-11-30 | CNG fills dress device based on organic rankine cycle |
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| CN102493851A (en) * | 2011-12-22 | 2012-06-13 | 吉林大学 | Energy-saving technology utilizing device of integrated type natural gas compressor |
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