CN111426092A - Waste heat absorption refrigeration cycle method and device - Google Patents
Waste heat absorption refrigeration cycle method and device Download PDFInfo
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- CN111426092A CN111426092A CN202010224598.8A CN202010224598A CN111426092A CN 111426092 A CN111426092 A CN 111426092A CN 202010224598 A CN202010224598 A CN 202010224598A CN 111426092 A CN111426092 A CN 111426092A
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- 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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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Abstract
The invention relates to a waste heat absorption refrigeration cycle method and a device, belonging to the technical field of refrigeration cycle. The method uses [ bmim][MeSO4]As an absorbent, using water as a refrigerant, [ bmim][MeSO4]The device has the characteristics of difficult volatilization, no corrosiveness and no crystallization problem, and realizes the absorption refrigeration cycle by utilizing waste heat. Compared with the traditional chemical solvent, the solvent has the advantages of less corrosion to equipment, no crystallization and low toxicity, greatly reduces energy consumption and saves equipment cost. After being mixed by an absorption tower [ bmim][MeSO4]‑H2The O is recycled to the generator after being subjected to pressurization and heat exchange, so that the heat loss can be ignored, and the cost is greatly saved. And the invention can effectively utilize a large amount of waste heat in the industrial production process.
Description
Technical Field
The invention relates to the technical field of refrigeration cycle, in particular to a waste heat absorption refrigeration cycle method and a device.
Background
The low-grade waste heat refers to a waste heat energy source which is low in grade, low in concentration, low in energy and not emphasized by people and is difficult to utilize. In industrial processes, large amounts of waste heat are discharged to the environment without being effectively utilized. Data has shown that the amount of waste heat lost in northern regions of our country is approximately 26 hundred million tons per year. With global warming and the increasing energy crisis, there is increasing concern about the recycling of waste heat.
In the conventional technology, researchers have proposed a lithium bromide absorption refrigeration air conditioning system, through connecting indirect evaporation cooling water chilling unit and lithium bromide absorption refrigeration system each other, can utilize low-level to be the heat energy (solar energy, waste heat, etc.) drive, thus save the energy consumption, but under the air condition, lithium bromide solution has stronger corrosivity to the ordinary carbon steel.
In recent years, the development of the technical field of absorption refrigeration is obviously promoted due to the application of the ionic liquid. If researchers propose to use 1, 3-dimethyl imidazole dimethyl phosphate ([ DMIM)][DMP]) The water working medium pair can use GAX absorption type circulation, and the result shows that when the temperature is higher, H is adopted under the working conditions that the condensation temperature is 30 ℃, the evaporation temperature is 10 ℃ and the absorption temperature is 30 DEG C2O/[DMIM][DMP]The COP of the GAX absorption refrigeration cycle is more than 27.5 percent higher than that of the single-effect absorption refrigeration cycle, and is more than 20 percent higher than that of the single-effect absorption refrigeration cycle adopting the lithium bromide aqueous solution. The advantages of ionic liquids for use in the field of absorption refrigeration are shown, but research on available working medium pairs is still relatively rare at present.
Disclosure of Invention
In view of the above, it is necessary to provide a waste heat absorption refrigeration cycle method using bmim][MeSO4]-H2The O working medium absorbs and refrigerates the circulation by utilizing the waste heat, not only can achieve the advantages of utilizing the chemical waste heat and saving energy, but also has no strong corrosion to the equipment.
A waste heat absorption refrigeration cycle method comprises the following steps:
(1) with [ bmim][MeSO4]-H2O as working substanceIn pair, water vapor and [ bmim ] are generated in the generator][MeSO4]Dilute solution and water vapor are condensed in the upper part of the generator and output, [ bmim][MeSO4]Discharging the dilute solution from a reboiler at the bottom of the generator tower;
(2) the water condensed by the condenser is decompressed by a first throttle valve and then enters an evaporator to form water vapor which is used as a refrigerant and introduced into the absorption tower;
(3) [ bmim ] discharged through reboiler][MeSO4]The dilute solution is cooled by a heat exchanger and flows into a second throttle valve for pressure reduction, and the reduced pressure [ bmim][MeSO4]The dilute solution is used as an absorbent to enter an absorption tower to absorb water vapor;
(4) the water vapor from the evaporator is absorbed in an absorption column by bmim][MeSO4]Absorbing with a dilute solution;
(5) concentrated after mixing [ bmim][MeSO4]-H2And the O is pressurized by the pump, flows through the heat exchanger and then is pumped into the generator to form circulating refrigeration.
The invention relates to an ionic liquid [ bmim][MeSO4](1-butyl-3-methylimidazolium methane sulfonic acid) was used in absorption refrigeration processes and found to be [ bmim][MeSO4]Is relatively viscous and is not conducive to flow during circulation. Based on the problems, the invention adopts water as the refrigerant, and the [ bmim ] can be effectively relieved by diluting the water][MeSO4]The high viscosity makes it possible to be used smoothly in a refrigeration process. Utilizes ionic liquid [ bmim][MeSO4]High chemical stability, high thermodynamic stability, difficult volatility, good conductivity and the like, and is an environment-friendly solvent. Thus using [ bmim][MeSO4]Has wide development space as an absorbent, and the matched refrigerant is water which is an environment-friendly pollution-free refrigerant with low cost, so [ bmim][MeSO4]-H2The O working medium pair has wide development prospect.
In one embodiment, the generator is a [ bmim ]][MeSO4]-H2The O working medium is centered, and the absorbent is [ bmim][MeSO4]The dosage is 217958.58kg/h, the refrigerant is water, and the dosage is 97923.42 kg/h.
In one embodiment, the heat source of the reboiler is low grade waste heat. It can be understood that the low-grade heat energy is heat energy which is difficult to utilize, and the waste heat absorption refrigeration cycle method can utilize the low-grade waste heat to generate lower cold quantity and realize the effect of 5 ℃ of refrigeration temperature.
And, [ bmim][MeSO4]-H2And the O returns to the generator after being subjected to absorption refrigeration, pressurization and heat exchange, and the heat loss of the whole system equipment can be ignored.
In one embodiment, the output pressure of the first throttle valve is 0.88-1.0 kpa; the output pressure of the second throttling is 0.88-1.0 kpa; the pressure of the evaporator is 0.88-1.0kpa, and the gasification fraction is 1; the pressure of the absorption tower is 0.88-1.0kpa, and the gasification fraction is 0.
In one embodiment, the generator is operated at 0.02MPa, the feed pressure is 0.1MPa, the feed temperature is 50-54 deg.C, the condenser temperature in the upper part of the generator is 60 deg.C, and the reboiler temperature in the bottom part is 64 deg.C.
In one embodiment, the output pressure of the pump is 0.03 MPa.
In one embodiment, the heat exchanger has a temperature of 21.2 ℃ and a pressure drop of 10 kpa.
In one embodiment, the evaporator has a heat load of 6270.36-6279.89kW, and the generator has a heat load of 17748.6 kW.
The invention also discloses application of the waste heat absorption refrigeration cycle method in preparation of refrigeration equipment.
The invention also discloses a device for realizing the waste heat absorption refrigeration cycle method, which comprises the following steps: the system comprises an evaporator, a generator, a throttle valve, a pump, an absorption tower and a heat exchanger, wherein a condenser at the upper part of the generator is communicated with an inlet of the evaporator through a first throttle valve, and an outlet of the evaporator is communicated with the absorption tower; a reboiler outlet at the lower part of the generator is communicated with a hot material inlet of the heat exchanger, and a hot material outlet of the heat exchanger is communicated with the absorption tower through a second throttling valve; the outlet of the absorption tower is communicated with the cold material inlet of the heat exchanger through the pump, and the cold material inlet of the heat exchanger is communicated with the inlet of the generator.
The working principle of the device is as follows: [ bmim][MeSO4]-H2O enters the generator GEN from the middle lower part, and dilute [ bmim ] is obtained at the tower bottom][MeSO4]The water vapor at the top of the tower is condensed into liquid water by the condenser, the liquid water is decompressed by a first throttle valve VA L1 and enters an evaporator EVA for evaporation and refrigeration to prepare high-grade cold energy, and then the high-grade cold energy enters a refrigerant water cold air absorption tower ABS.
Thin column bottom [ bmim][MeSO4]The water solution is cooled by a heat exchanger HEA, is decompressed by a second throttle valve VA L2, and enters an absorption tower ABS to absorb refrigerant steam to obtain concentrated [ bmim][MeSO4]-H2O, cooling the ABS of the absorption tower by using cold water from a water vapor condenser at the top of the tower, and concentrating the ABS of the absorption tower to be [ bmim][MeSO4]-H2And the O is pressurized by a circulating pump PUM, enters a heat exchanger HEA for heat exchange and then returns to a generator GEN to form circulating refrigeration.
In one embodiment, the generator has a tray count of 20 pieces, [ bmim ]][MeSO4]-H2The O working substance pair is fed from the 7 th plate.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a waste heat absorption refrigeration cycle method, which uses [ bmim][MeSO4]-H2O as a working medium pair, [ bmim ] is used][MeSO4]High chemical stability, high thermodynamic stability, difficult volatility, good conductivity and no corrosion to equipment, and the ionic liquid is an environment-friendly solvent][MeSO4]The absorbent is matched with environment-friendly and pollution-free refrigerant with lower cost, and has wide development space in absorption cycle refrigeration. The method of the invention has the advantages of low energy consumption, simple process and absorbent [ bmim][MeSO4]Easy recovery, good chemical thermal stability and reduced separation cost.
The invention relates to a waste heat absorption refrigeration cycle device, which adopts [ bmim][MeSO4]-H2The O is used as a working medium pair for refrigeration, so that the problem of strong corrosion to equipment is solved; and the refrigeration temperature of the refrigerant after heat exchange by the evaporator can be as low as 5 ℃, and the heat loss of the whole system equipment can be ignored.
Drawings
FIG. 1 is a schematic diagram of a waste heat absorption refrigeration cycle apparatus and method according to an embodiment.
Wherein, the generator is GEN, the VA L1 is a first throttle valve, the VA L2 is a second throttle valve, the EVA evaporator, the ABS absorption tower, the PUM pump and the HEA heat exchanger.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "coupled" to another element, it can be directly coupled to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The apparatus used in the following examples included: the system comprises an evaporator, a generator, a throttle valve, a pump, an absorption tower and a heat exchanger, wherein a condenser at the upper part of the generator is communicated with an inlet of the evaporator through a first throttle valve, and an outlet of the evaporator is communicated with the absorption tower; a reboiler outlet at the lower part of the generator is communicated with a hot material inlet of the heat exchanger, and a hot material outlet of the heat exchanger is communicated with the absorption tower through a second throttling valve; the outlet of the absorption tower is communicated with the cold material inlet of the heat exchanger through the pump, and the cold material inlet of the heat exchanger is communicated with the inlet of the generator.
It will be appreciated that the number of trays and the feed position of the generator can be flexibly adjusted to the specific case, but in the following examples the number of trays of the generator is 20, [ bmim ] in the following examples][MeSO4]-H2The O working substance pair is fed from the 7 th plate and is suitable for the conditions of the following examples.
The method for realizing the waste heat absorption refrigeration cycle by adopting the device comprises the following steps:
(1) with [ bmim][MeSO4]-H2O is used as a working medium pair, water vapor and [ bmim ] are generated in the generator][MeSO4]Dilute solution and water vapor are condensed in the upper part of the generator and output, [ bmim][MeSO4]Discharging the dilute solution from a reboiler at the bottom of the generator tower;
(2) the water condensed by the condenser is decompressed by a first throttle valve and then enters an evaporator to form water vapor which is used as a refrigerant and introduced into the absorption tower;
(3) [ bmim ] discharged through reboiler][MeSO4]The dilute solution is cooled by a heat exchanger and flows into a second throttle valve for pressure reduction, and the reduced pressure [ bmim][MeSO4]The dilute solution is used as an absorbent to enter an absorption tower to absorb water vapor;
(4) the water vapor from the evaporator is absorbed in an absorption column by bmim][MeSO4]Absorbing with a dilute solution;
(5) concentrated after mixing [ bmim][MeSO4]-H2And the O is pressurized by the pump, flows through the heat exchanger and then is pumped into the generator to form circulating refrigeration.
Example 1
In this embodiment, the above apparatus and method are used to implement a waste heat absorption refrigeration cycle, where the process parameters are as follows: absorbent [ bmim][MeSO4]The flow rate was 217958.58kg/h, and the flow rate of refrigerant water was 97923.42 kg/h. The feeding temperature was 50 ℃ and the feeding pressure was 0.1 MPa. The operating pressure of the generator GEN is 0.02MPa, and the number of plates is 20 [ [ phi ] ]bmim][MeSO4]-H2The working medium pair is fed from the 7 th plate, the temperature of a condenser at the top of the tower is 60 ℃, the temperature of a reboiler at the bottom of the tower is 64 ℃, the output pressure of a first throttle valve VA L1 is 0.88kpa, the output pressure of an evaporator EVA is 0.88kpa, the gasification fraction is 1, the evaporator EVA thermal load is 6270.36KW, the generator GEN thermal load is 17748.6KW, the temperature HEA of a heat exchanger is 21.2 ℃, the pressure drop is 10kpa, the output pressure of a second throttle valve VA L2 is 0.88kpa, the ABS pressure of an absorption tower is 0.88kpa, the gasification fraction is 0, the output pressure of a pump PUM is 0.03Mpa, the refrigeration temperature of a refrigerant after heat exchange through an evaporator is 5.1 ℃, the pressure of the evaporator is 0.88kpa, and the cold property coefficient is 0.3533.
Example 2
In this embodiment, the above apparatus and method are used to implement a waste heat absorption refrigeration cycle, where the process parameters are as follows: absorbent [ bmim][MeSO4]The flow rate was 217958.58kg/h, and the flow rate of refrigerant water was 97923.42 kg/h. The feeding temperature was 50 ℃ and the feeding pressure was 0.1 MPa. The operating pressure of the generator GEN is 0.02MPa, the number of trays is 20, [ bmim][MeSO4]-H2The working medium pair is fed from the 7 th plate, the temperature of a condenser at the top of the tower is 60 ℃, the temperature of a reboiler at the bottom of the tower is 64 ℃, the output pressure of a first throttle valve VA L1 is 0.94kpa, the output pressure of an evaporator EVA is 0.94kpa, the gasification fraction is 1, the evaporator EVA thermal load is 6275.26KW, the generator GEN thermal load is 17748.6KW, the temperature HEA of a heat exchanger is 21.2 ℃, the pressure drop is 10kpa, the output pressure of a second throttle valve VA L2 is 0.94kpa, the ABS pressure of an absorption tower is 0.94kpa, the gasification fraction is 0, the output pressure of a pump PUM is 0.03Mpa, the refrigeration temperature of a refrigerant after heat exchange through an evaporator is 6.1 ℃, the pressure of the evaporator is 0.94kpa, and the cold property coefficient is 0.3536.
Example 3
In this embodiment, the above apparatus and method are used to implement a waste heat absorption refrigeration cycle, where the process parameters are as follows: absorbent [ bmim][MeSO4]The flow rate was 217958.58kg/h, and the flow rate of refrigerant water was 97923.42 kg/h. The feeding temperature was 50 ℃ and the feeding pressure was 0.1 MPa. The operating pressure of the generator GEN is 0.02MPa, the number of trays is 20, [ bmim][MeSO4]-H2The working medium pair is fed from the 7 th plate, the temperature of a condenser at the top of the tower is 60 ℃, and a reboiler at the bottom of the towerThe temperature is 64 ℃, the output pressure of a first throttle valve VA L1 is 1.0kpa, the evaporation temperature EVA is 1.0kpa, the gasification fraction is 1, the evaporation temperature EVA heat load is 6279.89KW, the generator GEN heat load is 17748.6KW, the heat exchanger temperature HEA is 21.2 ℃, the pressure drop is 10kpa, the output pressure of a second throttle valve VA L2 is 1.0kpa, the absorption tower ABS pressure is 1.0kpa, the gasification fraction is 0, the pump PUM output pressure is 0.03Mpa, the refrigeration temperature of a refrigerant after heat exchange of an evaporator is 7.0 ℃, the evaporator pressure is 1.0kpa, and the cold performance coefficient is 0.3538.
By the above example, we have found that as the low side pressure increases, the refrigeration temperature increases from 5.1 ℃ to 7.0 ℃, and the cold coefficient of performance of the system also increases.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A waste heat absorption refrigeration cycle method is characterized by comprising the following steps:
(1) with [ bmim][MeSO4]-H2O is used as a working medium pair, water vapor and [ bmim ] are generated in the generator][MeSO4]Dilute solution and water vapor are condensed in the upper part of the generator and output, [ bmim][MeSO4]Discharging the dilute solution from a reboiler at the bottom of the generator tower;
(2) the water condensed by the condenser is decompressed by a first throttle valve and then enters an evaporator to form water vapor which is used as a refrigerant and introduced into the absorption tower;
(3) [ bmim ] discharged through reboiler][MeSO4]The dilute solution is cooled by a heat exchanger and flows into a second throttle valve for pressure reduction, and the reduced pressure [ bmim][MeSO4]The dilute solution is used as an absorbent to enter an absorption tower to absorb water vapor;
(4) the water vapor from the evaporator is absorbed in an absorption column by bmim][MeSO4]Absorbing with a dilute solution;
(5) concentrated after mixing [ bmim][MeSO4]-H2And the O is pressurized by the pump, flows through the heat exchanger and then is pumped into the generator to form circulating refrigeration.
2. The waste heat absorption refrigeration cycle method as claimed in claim 1, wherein [ bmim ] in the generator][MeSO4]-H2The O working medium is centered, and the absorbent is [ bmim][MeSO4]The dosage is 217958.58kg/h, the refrigerant is water, and the dosage is 97923.42 kg/h.
3. The method of claim 1, wherein the heat source of the reboiler is low grade waste heat.
4. A waste heat absorption refrigeration cycle method as claimed in any one of claims 1 to 3, wherein the output pressure of the first throttle valve is 0.88 to 1.0 kpa; the output pressure of the second throttling is 0.88-1.0 kpa; the pressure of the evaporator is 0.88-1.0kpa, and the gasification fraction is 1; the pressure of the absorption tower is 0.88-1.0kpa, and the gasification fraction is 0.
5. The method for refrigerating cycle according to any of claims 1 to 3, wherein the operating pressure in the generator is 0.02MPa, the feed pressure is 0.1MPa, the feed temperature is 50 to 54 ℃, the condenser temperature in the upper part of the generator is 60 ℃, and the reboiler temperature in the bottom of the generator is 64 ℃.
6. A waste heat absorption refrigeration cycle method as claimed in any one of claims 1 to 3, wherein the output pressure of the pump is 0.03 Mpa.
7. A waste heat absorption refrigeration cycle method as claimed in any one of claims 1 to 3, wherein the temperature of the heat exchanger is 21.2 ℃ and the pressure drop is 10 kpa.
8. Use of the waste heat absorption refrigeration cycle method of any one of claims 1 to 7 in the manufacture of a refrigeration device.
9. An apparatus for implementing the waste heat absorption refrigeration cycle method according to any one of claims 1 to 7, comprising: the system comprises an evaporator, a generator, a throttle valve, a pump, an absorption tower and a heat exchanger, wherein a condenser at the upper part of the generator is communicated with an inlet of the evaporator through a first throttle valve, and an outlet of the evaporator is communicated with the absorption tower; a reboiler outlet at the lower part of the generator is communicated with a hot material inlet of the heat exchanger, and a hot material outlet of the heat exchanger is communicated with the absorption tower through a second throttling valve; the outlet of the absorption tower is communicated with the cold material inlet of the heat exchanger through the pump, and the cold material inlet of the heat exchanger is communicated with the inlet of the generator.
10. The apparatus of claim 9, wherein the generator has a tray number of 20, [ bmim [ ]][MeSO4]-H2The O working substance pair is fed from the 7 th plate.
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| CN102378799A (en) * | 2009-03-31 | 2012-03-14 | 纳幕尔杜邦公司 | Temperature adjustment device |
| CN102822310A (en) * | 2010-04-20 | 2012-12-12 | 赢创德固赛有限公司 | Absorption heat pump with sorbent comprising a lithium salt and an organic salt with the same anion |
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2020
- 2020-03-26 CN CN202010224598.8A patent/CN111426092A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100095703A1 (en) * | 2005-06-17 | 2010-04-22 | Evonik Degussa Gmbh | Novel Working Media for Refrigeration Processes |
| CN102239229A (en) * | 2008-11-07 | 2011-11-09 | 纳幕尔杜邦公司 | Absorption cycle utilizing ionic compounds and/or non-ionic absorbents as working fluids |
| CN101737994A (en) * | 2008-11-12 | 2010-06-16 | 中国科学院工程热物理研究所 | Single-effective absorption refrigerating machine |
| CN102378799A (en) * | 2009-03-31 | 2012-03-14 | 纳幕尔杜邦公司 | Temperature adjustment device |
| CN102822310A (en) * | 2010-04-20 | 2012-12-12 | 赢创德固赛有限公司 | Absorption heat pump with sorbent comprising a lithium salt and an organic salt with the same anion |
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Application publication date: 20200717 |