CN112503786A - Novel refrigerating system containing phase change energy storage device - Google Patents
Novel refrigerating system containing phase change energy storage device Download PDFInfo
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- CN112503786A CN112503786A CN202011329068.6A CN202011329068A CN112503786A CN 112503786 A CN112503786 A CN 112503786A CN 202011329068 A CN202011329068 A CN 202011329068A CN 112503786 A CN112503786 A CN 112503786A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 16
- 239000003507 refrigerant Substances 0.000 claims abstract description 39
- 238000005338 heat storage Methods 0.000 claims abstract description 30
- 238000005057 refrigeration Methods 0.000 claims abstract description 28
- 238000009825 accumulation Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 230000005494 condensation Effects 0.000 claims description 18
- 238000009833 condensation Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a novel refrigeration system containing a phase change energy storage device, which comprises a compressor, a condenser, a throttling element and an evaporator, wherein the compressor, the condenser, the throttling element and the evaporator are connected through pipelines; the condenser comprises a phase change heat storage device, a first heat exchanger, a first three-way valve and a first control valve, refrigerant steam is switched through the first heat exchanger to the throttling element or through the phase change heat storage device to the throttling element through the switching of the first three-way valve, and the first control valve is used for releasing heat of the phase change heat storage device; the evaporator comprises a second heat exchanger, a second three-way valve, a phase change cold accumulation device and a second control valve, and through switching of the second three-way valve, the refrigerant passes through the second heat exchanger to the compressor or passes through the phase change cold accumulation device to the compressor, and the second control valve is adjusted to be used for the phase change cold accumulation device to release cold. The refrigerating system can meet the cold load requirements of different states, has the function of automatically adjusting the cold supply quantity, is convenient for the refrigerating compressor to work in the working range with the optimal performance, and improves the energy utilization rate of the refrigerating system.
Description
Technical Field
The invention relates to a refrigerating system, in particular to a novel refrigerating system with a phase change energy storage device.
Background
Due to the increasingly outstanding contradiction between the supply and demand of energy resource problems, each country has proposed mandatory standards and regulations for the performance index of the air conditioner in terms of energy conservation. Vapor compression refrigeration has long been the mainstream of refrigeration equipment development, and how to improve the performance of vapor compression refrigeration equipment is receiving wide attention in the industry.
At present, the field of vapor compression refrigeration is mainly in the aspects of research and development of alternative working media of Freon refrigerants, research of frequency conversion and magnetic suspension compressors, energy-saving equipment and the like, and the development of future refrigeration devices is a diversified trend. In actual use of the refrigeration equipment, the actual required cooling load is a variable parameter with multiple functions due to multiple factors such as external temperature, a wall structure, the size of an indoor space and the like. It is worth thinking how to improve the matching of the refrigeration system with the end requirements.
Disclosure of Invention
The invention aims to provide a novel refrigerating system containing a phase change energy storage device, which can meet the cold load requirements of different states, has the function of automatically adjusting the cold supply quantity, is convenient for a refrigerating compressor to work in the working range with the optimal performance, improves the energy utilization rate of the refrigerating system, greatly improves the adaptability of the refrigerating system and is also favorable for reducing the running cost of the refrigerating system.
The invention adopts the following technical scheme for realizing the aim of the invention:
the invention provides a novel refrigeration system containing a phase change energy storage device, which comprises a compressor, a condenser, a throttling element and an evaporator, wherein the compressor, the condenser, the throttling element and the evaporator are connected through pipelines;
the condenser comprises a phase change heat storage device, a first heat exchanger, a first three-way valve and a first control valve, refrigerant steam is enabled to pass through the first heat exchanger to the throttling element or pass through the phase change heat storage device to the throttling element through switching of the first three-way valve, and the first control valve is used for releasing heat of the phase change heat storage device;
the evaporator comprises a second heat exchanger, a second three-way valve, a phase change cold accumulation device and a second control valve, and through switching of the second three-way valve, a refrigerant passes through the second heat exchanger to the compressor or passes through the phase change cold accumulation device to the compressor, and the second control valve is adjusted to be used for the phase change cold accumulation device to release cold.
Further, the input end of the first three-way valve is connected with the outlet of the compressor, one output end of the first three-way valve is connected with the inlet end of the refrigerant loop of the first heat exchanger, and the other output end of the first three-way valve is connected with the inlet end of the refrigerant pipeline of the phase change heat storage device;
the outlet end of a refrigerant pipeline of the first heat exchanger and the outlet end of a refrigerant pipeline of the phase change heat storage device are connected with the inlet of the throttling element;
the condensation inlet end of the first heat exchanger is connected with a cold source inlet, and the condensation inlet end of the phase change heat storage device is connected with the cold source inlet through the first control valve;
the condensation outlet end of the first heat exchanger is connected with the cold source outlet, and the condensation outlet end of the phase change heat storage device is connected with the cold source outlet.
Furthermore, the cold source inlet and the cold source outlet are connected with a cooling tower system or a domestic hot water system or a boiler hot water system.
Further, the first control valve is an electric valve.
Further, the input end of the second three-way valve is connected with the outlet of the throttling element, one output end of the second three-way valve is connected with the inlet end of the refrigerant circuit of the heat exchanger, and the other output end of the second three-way valve is connected with the inlet end of the refrigerant pipeline of the cold accumulation device;
the outlet end of the refrigerant pipeline of the heat exchanger and the outlet end of the refrigerant pipeline of the phase change cold storage device are connected with the inlet of the compressor;
the chilled water outlet end and the chilled water inlet end of the second heat exchanger are respectively connected with a chilled water loop;
the chilled water inlet end of the phase change cold accumulation device is connected with the chilled water loop through the second control valve, and the chilled water outlet end of the phase change cold accumulation device is connected with the chilled water loop.
Further, the chilled water loop is connected with an end load.
Further, the second control valve is an electric valve.
Further, the throttling element is a capillary tube or an expansion valve.
The invention has the following beneficial effects:
the phase change heat storage device stores or releases heat by adjusting a first three-way valve and a first control valve in the condenser, so that the refrigerant obtains the optimal condensation effect, the overall operation efficiency of the refrigeration system is improved, and low-grade heat energy is effectively recovered;
through adjusting the second three-way valve and the second control valve in the evaporator, the phase change cold accumulation device accumulates or releases cold, cold load requirements in different states can be met, the refrigeration compressor can work in the working range with the best performance conveniently, the energy utilization rate of the refrigeration system is improved, the adaptability of the refrigeration system is greatly improved, and the operation cost of the refrigeration system is also reduced.
Drawings
Fig. 1 is a schematic diagram of a novel refrigeration system including a phase change energy storage device according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, the novel refrigeration system including a phase change energy storage device provided by the present invention includes a compressor 1, a condenser 2, a throttling element 3, and an evaporator 4. The novel condenser 2 comprises a phase change heat storage device 6, a first heat exchanger 5, a first three-way valve 8 and a first control valve 15; the novel evaporator 4 comprises a phase change cold accumulation device 7, a second heat exchanger 13, a second three-way valve 14 and a second control valve 16. By switching of the first three-way valve 8, the refrigerant vapor is caused to pass through the first heat exchanger 5 to the throttling element 3, or to pass through the phase change heat storage device 6 to the throttling element 3; by switching of the second three-way valve 14, the refrigerant is caused to pass through the second heat exchanger 13 to the compressor 1, or to pass through the phase change heat storage device 6 to the compressor 1.
In the condenser 2, the phase change heat storage device 6 and the first heat exchanger 5 can be adjusted and matched through the first three-way valve 8, so that switching of different loops under different functional requirements is realized. Wherein, the input end of the first three-way valve 8 is connected with the outlet of the compressor 1, and the two output ends are respectively connected with the inlet end of the refrigerant loop of the first heat exchanger 5 and the inlet end of the refrigerant pipeline of the phase change heat storage device 6; the outlet end of the refrigerant pipeline of the first heat exchanger 5 and the outlet end of the refrigerant pipeline of the phase change heat storage device 6 are connected with the inlet of the throttling element 3; the condensation inlet end of the first heat exchanger 5 and the condensation inlet end of the phase change heat storage device 6 are connected with the cold source inlet 9 through a first control valve 15; and the condensation outlet end of the first heat exchanger 5 and the condensation outlet end of the phase change heat storage device 6 are connected with a cold source outlet 10.
In this example, the cold source inlet 9 and the cold source outlet 10 are connected with the cooling tower system; in some examples, the system can also be connected with a domestic hot water system and a boiler hot water system.
Adjusting the first three-way valve 8 to keep the loop of the first heat exchanger 5 open, and condensing high-temperature and high-pressure refrigerant steam in the first heat exchanger 5; when the temperature of the refrigerant at the outlet of the first heat exchanger 5 is higher after condensation (such as under the working condition of high-temperature weather in summer), the first three-way valve 8 is adjusted to keep the loop of the phase change heat storage device 6 open, the high-temperature and high-pressure refrigerant steam is condensed in the phase change heat storage device 6, the condensation effect of the refrigerant is adjusted, the condensation temperature is reduced, and the phase change heat storage device 6 stores heat; when the phase change heat storage device 6 stores a certain amount of heat, the heat can be dissipated by the cooling tower connected with the cold source inlet 9 and the cold source outlet 10 through adjustment of the first control valve 15, or in some examples, the heat can be recycled by being connected with a domestic hot water system and a boiler hot water system; not only effectively adjust refrigerating system's condensation effect, also retrieved the heat of condensation.
In the evaporator 4, the phase change cold storage device 7 and the second heat exchanger 13 can be adjusted and matched through the second three-way valve 14, so that switching of different loops under different functional requirements is realized. Wherein, the input end of the second three-way valve 14 is connected with the outlet of the throttling element 3, and the two output ends are respectively connected with the inlet end of the refrigerant loop of the second heat exchanger 13 and the inlet end of the refrigerant pipeline of the phase change cold storage device 7; the outlet end of the refrigerant pipeline of the second heat exchanger 13, the outlet end of the refrigerant pipeline of the phase change cold storage device 7 connects the inlet of the compressor 1; the chilled water inlet and outlet ends of the second heat exchanger 13 and the phase change cold accumulation device 7 are respectively connected with chilled water loops 11 and 12; the chilled water circuits 11, 12 are connected to a terminal refrigeration device or load for cooling.
When the second three-way valve 14 is adjusted to keep the circuit path of the second heat exchanger 13, the phase change cold accumulation device 7 does not accumulate cold, and the refrigeration cycle keeps normal operation; when the second three-way valve 14 is adjusted to keep the passage of the phase change cold accumulation device 7, the refrigerant liquid is evaporated in the phase change cold accumulation device 7, and the phase change cold accumulation device 7 accumulates cold and stores cold; according to the requirement of a terminal load (such as the load of a terminal fan coil of a central air conditioner or the load of a fresh air unit), the second control valve 16 is adjusted to connect the phase change cold accumulation device 7 with the chilled water loops 11 and 12 and release cold energy; through the adjustment of the second three-way valve 14 and the second control valve 16, the self-adjustment of the cooling load of the refrigeration system can be realized, the overall operation efficiency of the refrigeration system is greatly improved, and the operation cost is greatly reduced.
The throttling element 3 is a capillary tube or an expansion valve.
The first control valve 15 and the second control valve 16 are electrically operated valves.
While the preferred embodiments of the present invention have been illustrated and described, it will be appreciated that the invention may be embodied otherwise than as specifically described and that equivalent alterations and modifications, which may be effected thereto by those skilled in the art without departing from the spirit of the invention, are deemed to be within the scope and spirit of the invention.
Claims (8)
1. The novel refrigeration system containing the phase change energy storage device is characterized by comprising a compressor, a condenser, a throttling element and an evaporator which are connected through pipelines;
the condenser comprises a phase change heat storage device, a first heat exchanger, a first three-way valve and a first control valve, refrigerant steam is enabled to pass through the first heat exchanger to the throttling element or pass through the phase change heat storage device to the throttling element through switching of the first three-way valve, and the first control valve is used for releasing heat of the phase change heat storage device;
the evaporator comprises a second heat exchanger, a second three-way valve, a phase change cold accumulation device and a second control valve, and through switching of the second three-way valve, a refrigerant passes through the second heat exchanger to the compressor or passes through the phase change cold accumulation device to the compressor, and the second control valve is adjusted to be used for the phase change cold accumulation device to release cold.
2. The novel refrigeration system containing the phase-change energy storage device as claimed in claim 1, wherein an input end of the first three-way valve is connected with an outlet of the compressor, an output end of the first three-way valve is connected with an inlet end of a refrigerant loop of the first heat exchanger, and another output end of the first three-way valve is connected with an inlet end of a refrigerant pipeline of the phase-change heat storage device;
the outlet end of a refrigerant pipeline of the first heat exchanger and the outlet end of a refrigerant pipeline of the phase change heat storage device are connected with the inlet of the throttling element;
the condensation inlet end of the first heat exchanger is connected with a cold source inlet, and the condensation inlet end of the phase change heat storage device is connected with the cold source inlet through the first control valve;
the condensation outlet end of the first heat exchanger is connected with the cold source outlet, and the condensation outlet end of the phase change heat storage device is connected with the cold source outlet.
3. The novel refrigeration system containing the phase-change energy storage device as claimed in claim 2, wherein the cold source inlet and the cold source outlet are connected to a cooling tower system or a domestic hot water system or a boiler hot water system.
4. The novel refrigeration system containing a phase change energy storage device as claimed in claim 2 or 3, wherein the first control valve is an electrically operated valve.
5. The novel refrigeration system containing the phase-change energy storage device as claimed in claim 1, wherein an input end of the second three-way valve is connected with an outlet of the throttling element, an output end of the second three-way valve is connected with an inlet end of a refrigerant circuit of the second heat exchanger, and another output end of the second three-way valve is connected with an inlet end of a refrigerant pipeline of the phase-change cold storage device;
the outlet end of the refrigerant pipeline of the heat exchanger and the outlet end of the refrigerant pipeline of the phase change cold storage device are connected with the inlet of the compressor;
the chilled water outlet end and the chilled water inlet end of the second heat exchanger are respectively connected with a chilled water loop;
the chilled water inlet end of the phase change cold accumulation device is connected with the chilled water loop through the second control valve, and the chilled water outlet end of the phase change cold accumulation device is connected with the chilled water loop.
6. The novel refrigeration system including a phase change energy storage device as recited in claim 4 wherein said chilled water loop is connected to an end load.
7. The novel refrigeration system containing a phase change energy storage device as claimed in claim 5 or 6, wherein the second control valve is an electrically operated valve.
8. The novel refrigeration system containing a phase change energy storage device as claimed in claim 1, wherein the throttling element is selected from a capillary tube or an expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011329068.6A CN112503786A (en) | 2020-11-24 | 2020-11-24 | Novel refrigerating system containing phase change energy storage device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011329068.6A CN112503786A (en) | 2020-11-24 | 2020-11-24 | Novel refrigerating system containing phase change energy storage device |
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| CN112503786A true CN112503786A (en) | 2021-03-16 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110296865A1 (en) * | 2009-01-15 | 2011-12-08 | Weixing Yuan | Solar photovoltaic -commercial electricity dually driven heat pump system with cold/heat storage |
| CN108119201A (en) * | 2017-12-22 | 2018-06-05 | 上海置信节能环保有限公司 | A kind of organic rankine cycle system containing phase-change energy storage device |
| CN108518773A (en) * | 2018-04-03 | 2018-09-11 | 中国科学院广州能源研究所 | A kind of energy-storage type double-circulating heat pump air-conditioning system |
| CN110186212A (en) * | 2019-05-20 | 2019-08-30 | 全球能源互联网欧洲研究院 | A kind of accumulation of heat, cold accumulation system |
| CN214665323U (en) * | 2020-11-24 | 2021-11-09 | 上海置信智能电气有限公司 | Novel refrigerating system containing phase change energy storage device |
-
2020
- 2020-11-24 CN CN202011329068.6A patent/CN112503786A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110296865A1 (en) * | 2009-01-15 | 2011-12-08 | Weixing Yuan | Solar photovoltaic -commercial electricity dually driven heat pump system with cold/heat storage |
| CN108119201A (en) * | 2017-12-22 | 2018-06-05 | 上海置信节能环保有限公司 | A kind of organic rankine cycle system containing phase-change energy storage device |
| CN108518773A (en) * | 2018-04-03 | 2018-09-11 | 中国科学院广州能源研究所 | A kind of energy-storage type double-circulating heat pump air-conditioning system |
| CN110186212A (en) * | 2019-05-20 | 2019-08-30 | 全球能源互联网欧洲研究院 | A kind of accumulation of heat, cold accumulation system |
| CN214665323U (en) * | 2020-11-24 | 2021-11-09 | 上海置信智能电气有限公司 | Novel refrigerating system containing phase change energy storage device |
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