CN114738723B - Method and system for generating steam by using compression heat pump - Google Patents
Method and system for generating steam by using compression heat pump Download PDFInfo
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- CN114738723B CN114738723B CN202210404460.5A CN202210404460A CN114738723B CN 114738723 B CN114738723 B CN 114738723B CN 202210404460 A CN202210404460 A CN 202210404460A CN 114738723 B CN114738723 B CN 114738723B
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- subcooler
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000006835 compression Effects 0.000 title claims abstract description 9
- 238000007906 compression Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 105
- 239000003507 refrigerant Substances 0.000 claims description 56
- 230000008569 process Effects 0.000 claims description 23
- 230000008859 change Effects 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000008016 vaporization Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000009834 vaporization Methods 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 11
- 238000003860 storage Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
-
- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
-
- 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention provides a method and a system for generating steam by utilizing a compression heat pump. The invention has the characteristics of high efficiency, energy saving, simplicity, reliability, good regulation performance and the like, can replace a boiler or partially replace the boiler to generate steam, is particularly suitable for occasions with various waste heat and the utilization of photoelectric wind power, and has the effects of energy saving, carbon reduction and environmental protection.
Description
Technical Field
The invention relates to the field of steam preparation, in particular to a method and a system for generating steam by utilizing a compression heat pump.
Background
In recent years, with the rising of high-temperature heat pumps, research and development of generating steam by using the heat pump are increasingly rising, and the problem of energy efficiency of generating steam by using the heat pump is outstanding because of high temperature of the condensing side of the heat pump, large temperature difference between the condensing temperature and the evaporating temperature and large pressure ratio. In addition, the temperature difference of the cold side and the hot side of the heat pump is large, the heat loss from the high-pressure high-temperature fluid to the low-temperature low-pressure fluid after throttling is also larger than that of the conventional heat pump, and the lost energy is effectively utilized, so that the efficiency of the steam heat pump and the steam yield can be obviously improved.
In fact, the steam generation process is unique compared with the conventional heat pump process for generating hot water heating, namely, on the one hand, the steam generation process needs high temperature, and on the other hand, the liquid water needed for generating the steam is low temperature and needs heating, and low-temperature heat source can be used for heating, the former is a phase change latent heat change process, the latter is a sensible heat change process, if water with the temperature of 20 ℃ is adopted, the steam with the temperature of 110 ℃ is generated, and the energy needed for heating the water is about 1/6 of the energy needed for vaporization of the water.
In addition, compared with a common heating hot water heat pump, the steam heat pump has difficult regulation of the steam output, and the regulation of the steam output is often an important factor affecting the reliability and applicability of the system, and even determines the success or failure of the system. Conventional hot water heat pumps are relatively easy to regulate by hot water storage, but steam storage is difficult, and it is difficult to effectively regulate the steam output by steam storage.
Disclosure of Invention
The invention is based on analysis of the characteristics of the heat pump cycle and the characteristics of the steam generation process, and discovers that the proportion of the available phase change heat (namely the heat release of a condenser) and the available sensible heat (namely the heat release of a subcooler) of the heat pump system has similar trend to the proportion of the energy required by water vaporization (the phase change heat) and the energy required by water heating (sensible heat), for example, when the condensation temperature and the evaporation temperature differ by about 60 ℃, the available heat of the subcooler is about 1/4 (the different refrigerant proportions are changed) of the heat of the condenser (the energy required by water heating is about 1/6 of the energy required by water vaporization and less than 1/4), so the heat release of the subcooler can be fully utilized to preheat liquid water, and the heat release of the condenser can lead the preheated water to be vaporized, thereby greatly improving the energy efficiency of the heat pump for generating steam. It is apparent that the heat of the subcooler is substantially unavailable to the conventional hot water heating heat pump. Based on the above analysis, it can be concluded that, although the energy efficiency of the steam heat pump is lower than that of the ordinary hot water heat pump, the steam heat pump can be partially compensated by the effective utilization of the heat of the subcooler, improving the efficiency and increasing the steam yield.
In addition, the invention realizes the adjustment of steam output through ingenious utilization of the subcooler, namely the adjustment of the output heat of the subcooler, and the adjustment mode is simple and reliable. The subcooler plays three roles, namely, the energy efficiency of the heat pump is improved, the steam yield is increased, the steam yield can be adjusted, the economy of the heat pump is good, and the cost is low.
The technical scheme adopted by the invention is as follows:
a method for producing steam by using compression heat pump, the compression heat pump includes connecting the compressor, condenser, subcooler, throttle valve and evaporator forming the refrigerant circulation loop in turn (the high-temperature high-pressure gaseous refrigerant from the compressor enters the condenser first, the liquid refrigerant after being condensed enters the subcooler and is discharged out of the subcooler after being subcooled, enters the evaporator after being throttled by the throttle valve, the refrigerant in the evaporator evaporates to produce gaseous refrigerant and enters the compressor); the process of generating steam by the heat pump is divided into two processes, namely a water heating process and a water vaporizing process, wherein the water heating process corresponds to a high-temperature high-pressure liquid refrigerant cooling process, and the water vaporizing process corresponds to a high-temperature high-pressure gaseous refrigerant condensing process. Namely: the vaporization phase change process of water with the temperature of a first temperature is realized by utilizing the refrigerant phase change process in the heat pump condenser, steam is generated, the temperature of water with the temperature of a second temperature is raised by utilizing the refrigerant cooling phase change-free process of the heat pump subcooler, the water with the temperature of the first temperature enters the water side of the subcooler to raise the temperature, and then enters the water side of the condenser to vaporize, and the steam is output.
Further, the water with the first temperature and the refrigerant exchange heat in countercurrent in the subcooler.
Further, the water entering the subcooler is preheated first.
Further, a part of the water entering the condenser comes from the subcooler, and the other part of the water directly enters the condenser, namely: the water with the second temperature comprises water which is heated by utilizing the refrigerant cooling and no phase change process of the heat pump subcooler and other water with the second temperature.
Further, the method also comprises the step of adjusting the flow of water with the temperature of the first temperature and/or refrigerant with the temperature of the first temperature into the subcooler through the bypass, and adjusting the amount of steam produced.
A heat pump system for generating steam comprises a compressor, a condenser, a subcooler, a throttle valve and an evaporator, wherein an outlet of the compressor is connected with a refrigerant side inlet of the condenser, a refrigerant side outlet of the condenser is connected with a refrigerant side inlet of the subcooler, a refrigerant side outlet of the subcooler is connected with an inlet of the throttle valve, an outlet of the throttle valve is connected with a refrigerant side inlet of the evaporator, a refrigerant side outlet of the evaporator is connected with an inlet of the compressor, a water side inlet of the subcooler is connected with a water supply source, a water side outlet of the subcooler is connected with a water side inlet of the condenser, and steam is discharged from the water side outlet of the condenser.
Further, the water-cooled condenser further comprises a preheater, wherein an inlet of a hot fluid channel of the preheater is connected with a water supply source, and an outlet of the hot fluid channel of the preheater is connected with a water side inlet of the subcooler.
Further, the condenser also comprises a tee joint, one end of the tee joint is connected with the water side outlet of the subcooler, the other end of the tee joint is connected with the water side inlet of the condenser, and the other end of the tee joint is connected with a high-temperature water source.
Further, the device also comprises a refrigerant bypass and/or a water bypass, wherein the water bypass is connected with a water supply source and a water side inlet of the condenser, the refrigerant bypass is connected with a refrigerant side outlet of the condenser and an inlet of the throttle valve, valves are arranged on the refrigerant bypass and the water bypass, and the amount of steam produced is controlled by regulating the flow of bypass fluid through the valves.
The invention has the beneficial effects that the heat pump process is highly matched with the steam generation process and optimized, and the novel compression heat pump-based steam generation method and system are provided, and the system has the characteristics of high efficiency, energy conservation, simplicity, reliability, good regulation performance and the like, can replace a boiler or partially replace the boiler to generate steam, is particularly suitable for occasions with various waste heat and the utilization of photoelectric wind power, and has the effects of energy conservation, carbon reduction and environmental protection.
Drawings
FIG. 1 is a basic schematic of the present invention
FIG. 2 is a system with a preheater
FIG. 3 is a system with tee
FIG. 4 is a system with subcooler bypass
Detailed Description
As shown in fig. 1, the system 100 includes a compressor 101, a condenser 102, a subcooler 103, a throttle valve 104, an evaporator 105, a refrigerant pipe 106 and accessories, wherein an outlet of the compressor 101 is connected to a refrigerant side inlet of the condenser 102, a refrigerant side outlet of the condenser 102 is connected to a refrigerant side inlet of the subcooler 103, a refrigerant side outlet of the subcooler 103 is connected to an inlet of the throttle valve 104, an outlet of the throttle valve 104 is connected to a refrigerant side inlet of the evaporator 105, a refrigerant side outlet of the evaporator 105 is connected to an inlet of the compressor 101, a water side inlet of the subcooler 103 is connected to a water supply 107, a water side outlet of the subcooler 103 is connected to a water side inlet of the condenser 102, and a water side outlet of the condenser 102 discharges steam. The evaporator 105 may use a water source or an air source, or waste heat as a heat source, including exhausted hot liquid, hot water, hot gas, etc. in the industrial field.
The low-temperature liquid water LLW (the temperature is the first temperature) enters the water side of the subcooler 103 to be heated, the heated water HLW (the temperature is the second temperature) enters the water side of the condenser 102 to be vaporized, steam LS is output to the outside, the high-temperature high-pressure gaseous refrigerant HGR from the compressor 101 firstly enters the condenser 102 to be condensed, the condensed liquid refrigerant HLR enters the subcooler 103 to be subcooled and then is discharged out of the subcooler 103, the subcooled liquid refrigerant LLR enters the evaporator 105 after being throttled by the throttle valve 104, and the refrigerant in the evaporator 105 is vaporized to generate gaseous refrigerant to enter the compressor 101. The liquid water and the refrigerant can exchange heat in countercurrent in the subcooler 103 to obtain better effect.
The system 200 of fig. 2 is compared with the system 100, a preheater 201 is added, the preheater 201 preheats the water entering the subcooler 103 by using other heat energy such as waste heat, the waste hot water from the waste heat source 203 is adopted for preheating in fig. 2, the waste heat source 203 is simultaneously used as a heat source of a heat pump evaporator in fig. 2, a waste heat water pipe 204 is shown to be connected with the waste heat source 203, the evaporator 105 and the preheater 201 are connected, and the pump 202 drives the hot water to circulate.
Compared with the system of fig. 1, the system of fig. 2 uses not only the subcooler 103 to reduce the load of the heat pump condenser 102, but also waste heat to reduce the load of the heat pump condenser 102, and whether the subcooler 103 is used or waste heat is used, the core is to reduce the load of the condenser 102, and the condenser 102 is a high-temperature heat source, and the reduction of the load means the improvement of the COP of the heat pump.
In the system 300 of fig. 3, compared with the system of fig. 1, a tee 301 is added, one end of the tee 301 is connected with the water side outlet of the subcooler 103, one end is connected with the water side inlet of the condenser 102, the other end is connected with the high-temperature water source, high-temperature water hLW from the high-temperature water source can directly enter the condenser 102 without passing through the subcooler 103, for example, high-temperature steam condensate (with the second temperature) can directly enter the condenser 102 for evaporation to generate steam.
The system 400 of fig. 4 adds a water bypass and a refrigerant bypass, of course, only one bypass may be added, the water bypass is connected with the water supply source 107 and the water side inlet of the condenser 102, the water bypass is provided with a regulating valve 401, the refrigerant water bypass is connected with the refrigerant side outlet of the condenser 102 and the inlet of the throttle valve 104, the refrigerant water bypass is provided with a regulating valve 402, when the flow rate of the liquid water bypass or the refrigerant bypass is increased, or both of them are increased, the heat output by the subcooler 103 is reduced, the load of the condenser 102 for heating the liquid water is increased, and thus the steam generation amount is reduced. Thereby regulating the steam production.
Compared with other methods, the method is simpler and more reliable than the steam pressure storage tank and the compressor frequency conversion, for example, the steam pressure storage tank is a pressure vessel, the safety problem exists, and the compressor frequency conversion, especially for a high-temperature heat pump, the stability and applicability problems, the oil return problems and the like of the compressor exist.
Examples:
the process hot fluid with the temperature of 60 ℃ is used as a heat source (a certain phosphorus chemical industry) to prepare 115 ℃ steam, the rated heat supply capacity of a heat pump is 2000kW, the working medium of the heat pump is R245fa, the system shown in figure 3 is adopted, the two conditions are compared and run, the first condition is that the water supplementing hLW is closed, the LLW is 50 ℃, the LLW enters an evaporator after being heated by a subcooler, the heat quantity of the steam produced by the heat pump is 2150kW, the power consumption of a compressor is 646kW, and the COP of the heat pump is 3.33. In the second case, the water supplementing hLW is started, the hLW water temperature is 50 ℃, the water directly enters the evaporator, the LLW does not enter water, namely the subcooler does not work, the heat pump generates steam with the heat of 1973kW, the compressor power consumption is 651kW, and the heat pump COP is 3.03. In the first case of the scheme of the invention, the heat pump output and the COP value are improved.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary or exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (6)
1. A method for generating steam by using a compression heat pump, which is characterized in that the compression heat pump comprises a compressor, a condenser, a subcooler, a throttle valve and an evaporator which are sequentially connected to form a refrigerant circulation loop; the method comprises the steps of firstly realizing the temperature rise of water with a first temperature by utilizing a cooling and no phase change process of a refrigerant in a heat pump subcooler, and then realizing the vaporization phase change process of water with a second temperature by utilizing the phase change process of the refrigerant in a heat pump condenser to generate steam, wherein the first temperature is lower than the second temperature; countercurrent heat exchange is carried out between water with the first temperature and the refrigerant in the subcooler; the method also comprises the step of regulating the flow of water with the temperature of the first temperature entering the subcooler and/or refrigerant entering the subcooler through a bypass, and regulating the amount of steam produced.
2. The method of claim 1, further comprising preheating the water entering the subcooler at a first temperature.
3. The method of claim 1, wherein the water at the second temperature comprises water at the elevated temperature and other water at the second temperature achieved by a phase change free process of cooling the refrigerant of the heat pump subcooler.
4. The heat pump system for generating steam is characterized by comprising a compressor, a condenser, a subcooler, a throttle valve and an evaporator, wherein an outlet of the compressor is connected with a refrigerant side inlet of the condenser, a refrigerant side outlet of the condenser is connected with a refrigerant side inlet of the subcooler, a refrigerant side outlet of the subcooler is connected with an inlet of the throttle valve, an outlet of the throttle valve is connected with a refrigerant side inlet of the evaporator, a refrigerant side outlet of the evaporator is connected with an inlet of the compressor, a water side inlet of the subcooler is connected with a water supply source, a water side outlet of the subcooler is connected with a water side inlet of the condenser, and steam is discharged from the water side outlet of the condenser; the water bypass is connected with a water supply source and a water side inlet of the condenser, the refrigerant bypass is connected with a refrigerant side outlet of the condenser and an inlet of the throttle valve, valves are arranged on the refrigerant bypass and the water bypass, and the amount of steam produced through flow control of bypass fluid is regulated through the valves.
5. The system of claim 4, further comprising a preheater, wherein an inlet of the hot fluid path of the preheater is connected to the water supply and an outlet of the hot fluid path of the preheater is connected to the water side inlet of the subcooler.
6. The system of claim 4, further comprising a tee having one end connected to the water side outlet of the subcooler and one end connected to the water side inlet of the condenser and the other end connected to a source of high temperature water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210404460.5A CN114738723B (en) | 2022-04-18 | 2022-04-18 | Method and system for generating steam by using compression heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210404460.5A CN114738723B (en) | 2022-04-18 | 2022-04-18 | Method and system for generating steam by using compression heat pump |
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| Publication Number | Publication Date |
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| CN114738723A CN114738723A (en) | 2022-07-12 |
| CN114738723B true CN114738723B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210404460.5A Active CN114738723B (en) | 2022-04-18 | 2022-04-18 | Method and system for generating steam by using compression heat pump |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202993655U (en) * | 2012-11-13 | 2013-06-12 | 罗伟强 | Double-supercooling heat pump |
| JP2014173743A (en) * | 2013-03-06 | 2014-09-22 | Miura Co Ltd | Steam generation system |
| CN106969337A (en) * | 2017-04-14 | 2017-07-21 | 中国科学院广州能源研究所 | A kind of heat-pump steam engine group |
| CN208269106U (en) * | 2018-05-28 | 2018-12-21 | 郑州轻工业学院 | A kind of high-temperature steam-generating heat pump system of steam-hot-water combined supplying |
| CN111076154A (en) * | 2019-12-17 | 2020-04-28 | 中国科学院广州能源研究所 | Heat pump steam engine and phase-change sleeve type heat exchanger for heat pump steam engine |
| CN215352010U (en) * | 2021-07-14 | 2021-12-31 | 江西九二盐业有限责任公司 | Novel mechanical compression type heat pump evaporation salt making system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5263421B1 (en) * | 2012-03-30 | 2013-08-14 | 三浦工業株式会社 | Water heating system |
-
2022
- 2022-04-18 CN CN202210404460.5A patent/CN114738723B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202993655U (en) * | 2012-11-13 | 2013-06-12 | 罗伟强 | Double-supercooling heat pump |
| JP2014173743A (en) * | 2013-03-06 | 2014-09-22 | Miura Co Ltd | Steam generation system |
| CN106969337A (en) * | 2017-04-14 | 2017-07-21 | 中国科学院广州能源研究所 | A kind of heat-pump steam engine group |
| CN208269106U (en) * | 2018-05-28 | 2018-12-21 | 郑州轻工业学院 | A kind of high-temperature steam-generating heat pump system of steam-hot-water combined supplying |
| CN111076154A (en) * | 2019-12-17 | 2020-04-28 | 中国科学院广州能源研究所 | Heat pump steam engine and phase-change sleeve type heat exchanger for heat pump steam engine |
| CN215352010U (en) * | 2021-07-14 | 2021-12-31 | 江西九二盐业有限责任公司 | Novel mechanical compression type heat pump evaporation salt making system |
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| CN114738723A (en) | 2022-07-12 |
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