CN112066586A - High-efficient waste heat of utilizing and many refrigerant circulation system - Google Patents
High-efficient waste heat of utilizing and many refrigerant circulation system Download PDFInfo
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- CN112066586A CN112066586A CN202011042112.5A CN202011042112A CN112066586A CN 112066586 A CN112066586 A CN 112066586A CN 202011042112 A CN202011042112 A CN 202011042112A CN 112066586 A CN112066586 A CN 112066586A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 73
- 239000002918 waste heat Substances 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005057 refrigeration Methods 0.000 description 13
- 238000005265 energy consumption Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
- F25B27/005—Machines, plants or systems, using particular sources of energy using solar energy in compression type systems
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses a circulating system for efficiently utilizing waste heat and multiple refrigerants, which comprises a compressor, a solar ejector, a condenser, a solution circulating system, a gas-liquid separator, a throttle valve, an evaporator and a four-way reversing valve, wherein the condenser, the evaporator, the compressor and the solar ejector compressor are all connected to the four-way reversing valve; the solar jet compressor is provided with two outlets, is connected with a four-way reversing valve through one outlet and is connected with a solution circulating system through the other outlet; the invention has the beneficial effects that: the diversified utilization of energy can be realized by utilizing waste heat and waste heat in the solution circulating system and utilizing solar energy; the two-stage compression system consisting of the two systems can also reduce the power required by the compressor, thereby further saving energy.
Description
Technical Field
The invention relates to an air conditioner refrigerating system, in particular to a circulating system capable of efficiently utilizing waste heat and multiple refrigerants.
Background
With the development of economic society, the use of refrigeration equipment such as air conditioners is increasing, and the total amount thereof is rapidly increasing. Most of the refrigeration systems used by people at present are vapor compression refrigeration systems, and the vapor compression refrigeration systems have the advantages of compact structure, good stability, easy control and simple and convenient maintenance, so the vapor compression refrigeration systems are largely used in production and life of people. However, with the large-scale use, the defects are increasingly reflected. The steam compression refrigerating system is basically powered by a high-grade heat source, the load of the steam compression refrigerating system on an energy system is large along with the increase of the base number, and the waste heat generated by the process is basically not utilized, so that the energy consumption is huge. At present, the global energy structure still occupies the main position of fossil energy, but the fossil energy is a non-renewable resource, and the reserves of the fossil energy are increasingly reduced. And China is the world's largest developing country, the second economic body in the world, and the energy consumption is second to the United states. Among the world energy consumption, the building energy consumption occupies about 37 percent, and in China, the building energy consumption reaches about 40 percent. According to incomplete statistics, the energy consumption of refrigeration systems such as air conditioners and the like reaches more than half of the energy consumption of buildings, which is a huge energy consumption point. For our country with large energy consumption, the utilization and use of energy are better as much as possible. Therefore, the use and development of new energy are all slow, especially for waste heat, the recovery and utilization of the waste heat can fully utilize sensible heat and latent heat which are not reasonably utilized, the solar heat is inexhaustible energy, and the development trend of human beings is not met when the energy treasury is placed to be not utilized. Therefore, if the utilization of the waste heat and the solar energy can be introduced into the refrigerating system, the energy conservation for our is very huge.
The full utilization of waste heat and the injection compression refrigeration system have different characteristics. The refrigeration system has the advantages of simple structure, simple and convenient operation, few moving parts, convenient maintenance and low operation cost, is driven by using a low-grade heat source, fully utilizes solar energy, and is an environment-friendly technology. Meets the development requirement of 'environment-friendly'.
Disclosure of Invention
The invention aims to combine a vapor compression refrigeration system with an injection refrigeration system and a waste heat recycling system, and add solar energy as one of energy sources to form a waste heat and double-refrigerant circulating system, so that the advantages of the two refrigeration systems can be concentrated. And the performance coefficient is improved, and the energy consumption is reduced. Can utilize low-grade waste heat and waste heat, can save energy, improve economic benefit, and have better earthquake-proof performance and operational reliability.
The technical scheme of the invention is as follows:
a circulating system capable of efficiently utilizing waste heat and multiple refrigerants is characterized by comprising a compressor, a solar ejector, a condenser, a solution circulating system, a gas-liquid separator, a throttle valve, an evaporator and a four-way reversing valve, wherein the condenser, the evaporator, the compressor and the solar ejector compressor are all connected to the four-way reversing valve; the solar jet compressor is provided with two outlets, is connected with a four-way reversing valve through one outlet and is connected with a solution circulating system through the other outlet; the outlet of the condenser is connected with a gas-liquid separator, the gas-liquid separator is provided with two outlets, the two outlets are connected with the solution circulating system through one outlet, the other outlet is connected with a throttling valve, and the throttling valve is connected with the evaporator.
The multi-refrigerant circulating system capable of efficiently utilizing waste heat is characterized in that the solar ejector absorbs heat of the sun, so that mixed refrigerant in a refrigerant pipeline of the compressor is heated and pressurized, and power of secondary compression is provided for the whole system circulation.
The multi-refrigerant circulating system capable of efficiently utilizing waste heat is characterized in that mixed refrigerants are arranged in a refrigerant pipeline of a compressor and comprise a first refrigerant and a second refrigerant.
The high-efficiency waste heat utilization and multi-refrigerant circulating system is characterized in that a refrigerant III is arranged in the solution circulating system, the solution circulating system comprises a generator and a heat exchanger, an outlet of the generator is connected with an inlet of the heat exchanger, and an outlet of the heat exchanger is connected with an inlet of the generator.
The circulating system capable of efficiently utilizing waste heat and multiple refrigerants is characterized in that when the four-way reversing valve is used for communicating the solar jet compressor with the condenser and the evaporator with the compressor, the circulating system is in a refrigerating state.
The circulating system capable of efficiently utilizing waste heat and multiple refrigerants is characterized in that when the four-way reversing valve is used for communicating the solar jet compressor with the evaporator and the condenser with the compressor, the circulating system is in a heating state.
The invention has the beneficial effects that:
1) the diversified utilization of energy can be realized by utilizing waste heat and waste heat in the solution circulating system and utilizing solar energy; the two-stage compression system consisting of the two systems can also reduce the power required by the compressor, thereby further saving energy.
2) The invention comprises a traditional refrigerating and heating circulating circuit and circulating systems of other refrigerant heat exchange systems, different refrigerant working media are relatively stable and show different condensing temperatures and evaporating temperatures, thereby realizing multi-system circulation, realizing diversified utilization of energy and meeting the energy-saving development requirements of environmental protection.
Drawings
FIG. 1 is a schematic view of a refrigeration cycle apparatus of the present invention;
FIG. 2 is a schematic view of a heating cycle apparatus of the present invention;
in the figure, 1-gas-liquid separator, 2-heat exchanger, 3-condenser, 4-solar ejector, 5-four-way reversing valve, 6-evaporator, 7-compressor, 8-generator and 9-throttle valve.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1, the multi-refrigerant cycle system capable of efficiently utilizing waste heat includes a gas-liquid separator 1, a heat exchanger 2, a condenser 3, a solar ejector 4, a four-way reversing valve 5, an evaporator 6, a compressor 7, a generator 8 and a throttle valve 9.
Mixed refrigerants are arranged in a refrigerant pipeline of the compressor 7, and the mixed refrigerants comprise two types, wherein one type is a refrigerant I which adopts R404a, and the other type is a refrigerant II which adopts R134 a;
when the system is in a refrigeration working condition, the mixed refrigerant I and the refrigerant II work through the compressor 7 to form a high-temperature high-pressure mixed gas state, the mixed working medium enters the condenser 3 through the solar ejector 4 under the switching of the four-way reversing valve, the refrigerant is in a liquid state after heat exchange and cooling through the condenser 3, the refrigerant II is continuously kept in the gas state after cooling, and the condensation temperature of the refrigerant II is lower than that of the refrigerant I. The gas-liquid mixed refrigerant from the condenser 3 passes through a gas-liquid separator I to realize the separation of the refrigerant I and the refrigerant II; after the mixed refrigerant is subjected to gas-liquid separation, the refrigerant has higher refrigerating capacity after being cooled and depressurized by the throttle valve 9, the refrigerant 1 flowing out of the throttle valve 9 passes through the evaporator 6, exchanges heat with the outside through fins on the evaporator 6, evaporates and absorbs heat to realize the refrigerating effect, at the moment, the refrigerant is changed into a gaseous state, and the gaseous refrigerator flows back to the compressor 7 through the four-way reversing valve 5.
The second gaseous refrigerant flows to a solution circulating system (generator 8) after passing through the gas-liquid separator 1, low-grade energy such as waste heat and waste heat can be fully absorbed in the solution generating system, a third refrigerant is arranged in the solution circulating system (generator 8), the third refrigerant adopts R600a, the third refrigerant is changed into a gaseous state after absorbing heat and then is fully contacted with the second refrigerant, the second refrigerant keeps the gaseous state after being heated, and the third refrigerant is changed into a liquid state after being subjected to heat exchange by the heat exchanger 2. The condensation temperature of the refrigerant three is higher than that of the refrigerant two, and the refrigerant three is more likely to become a liquid state than the refrigerant two. The temperature of the refrigerant III is further reduced after heat exchange through the heat exchanger 2 by the generator 8, the refrigerant III enters the condenser 3 and is fully subjected to heat exchange with the mixed refrigerant I and the refrigerant II to take away most heat, and the refrigerant III returns to the generator 8 after passing through the condenser 3 to continue circulation.
When the system is in a heating working condition, a first mixed refrigerant and a second mixed refrigerant become a high-temperature high-pressure mixed gas after being processed by a compressor 7, the high-temperature high-pressure mixed gas passes through a four-way reversing valve 5 and then flows through an evaporator 6, the mixed gas is subjected to sufficient heat exchange with the outside on fins of the evaporator 6 to release heat, the first mixed refrigerant becomes a liquid state due to high condensation temperature, the second mixed refrigerant keeps a gas state continuously, the mixed refrigerant of an enterprise is cooled by a throttle valve 9 and then is subjected to gas-liquid separation by a gas-liquid separator 1, and the liquid refrigerant is evaporated into steam after being subjected to heat exchange by a condenser and then returns to the compressor 7 through the four-way reversing valve 5 to realize.
And in the heating working condition, the gaseous refrigerant II enters the generator 8 through the gas-liquid separator 1, is converted into high-temperature steam after heat exchange in the solution circulator 8, and is mixed with the high-temperature high-pressure refrigerant II after obtaining a certain pressure through the solar injection device 4 and then passes through the four-way reversing valve 5, so that the heating cycle is realized.
Claims (6)
1. The circulating system is characterized by comprising a compressor (7), a solar ejector (4), a condenser (3), a solution circulating system, a gas-liquid separator (1), a throttle valve (9), an evaporator (6) and a four-way reversing valve (5), wherein the condenser (3), the evaporator (6), the compressor (7) and the solar ejector compressor (4) are all connected to the four-way reversing valve (5); the compressor (7) is connected with a main inlet of the solar jet compressor (4) through a refrigerant pipeline, the solar jet compressor (4) is provided with two outlets, one outlet is connected with the four-way reversing valve (5), and the other outlet is connected with the solution circulating system; the outlet of the condenser (3) is connected with the gas-liquid separator (1), the gas-liquid separator (1) is provided with two outlets, the two outlets are connected with the solution circulating system through one outlet, the other outlet is connected with the throttle valve (9), and the throttle valve (9) is connected with the evaporator (6).
2. The system for efficiently utilizing waste heat and multiple refrigerants according to the claim 1, is characterized in that the solar ejector (4) absorbs the heat of the sun, so as to heat and pressurize the mixed refrigerant in the refrigerant pipeline of the compressor (7), and the power of two-stage compression is provided for the whole system circulation.
3. The system of claim 2, wherein the refrigerant pipeline of the compressor (7) is provided with mixed refrigerant comprising a first refrigerant and a second refrigerant.
4. The system for efficiently utilizing waste heat and multiple refrigerants according to claim 1, wherein a refrigerant III is arranged in the solution circulating system, the solution circulating system comprises a generator (8) and a heat exchanger (2), an outlet of the generator (8) is connected with an inlet of the heat exchanger (2), and an outlet of the heat exchanger (2) is connected with an inlet of the generator (8).
5. The system of claim 1, wherein the four-way reversing valve (5) is used for connecting the solar jet compressor (4) and the condenser (3) and connecting the evaporator (6) and the compressor (7), and the system is in a refrigerating state.
6. The system of claim 1, wherein the four-way reversing valve (5) is used for connecting the solar injection compressor (4) and the evaporator (6) and connecting the condenser (3) and the compressor (7), and the system is in a heating state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011042112.5A CN112066586A (en) | 2020-09-28 | 2020-09-28 | High-efficient waste heat of utilizing and many refrigerant circulation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011042112.5A CN112066586A (en) | 2020-09-28 | 2020-09-28 | High-efficient waste heat of utilizing and many refrigerant circulation system |
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| Publication Number | Publication Date |
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| CN112066586A true CN112066586A (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011042112.5A Pending CN112066586A (en) | 2020-09-28 | 2020-09-28 | High-efficient waste heat of utilizing and many refrigerant circulation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357846A (en) * | 2021-06-08 | 2021-09-07 | 南京工业大学 | Liquid separation condensation injection-compression refrigeration cycle system |
| CN113357845A (en) * | 2021-06-08 | 2021-09-07 | 南京工业大学 | Liquid separation condensation compression-injection refrigeration cycle system |
| CN113654262A (en) * | 2021-08-31 | 2021-11-16 | 嵊州市浙江工业大学创新研究院 | Low-grade heat-driven refrigerating system for large-scale freezer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930752A (en) * | 2015-05-29 | 2015-09-23 | 浙江工业大学 | Jet-compression refrigerating system driven through low-grade heat energy of supercooler |
| FR3049338A1 (en) * | 2016-03-23 | 2017-09-29 | Univ Shanghai Ocean | SELF-CASCADE AND EJECTION REFRIGERATION DEVICE FOR LOST HEAT RECOVERY OF CANBOR THRU |
| CN108007009A (en) * | 2017-11-07 | 2018-05-08 | 西安交通大学 | A kind of the solar-energy jet-type waring and cooling air conditioning system and operational mode of waste heat auxiliary |
| CN108106048A (en) * | 2018-01-11 | 2018-06-01 | 西安交通大学 | A kind of injector expansion self-cascade refrigeration system system and the course of work |
| CN110360639A (en) * | 2019-06-11 | 2019-10-22 | 太原理工大学 | Direct-expansion type solar energy injection couples heating and cooling device with compression |
| CN214039029U (en) * | 2020-09-28 | 2021-08-24 | 浙江工业大学 | Multi-refrigerant efficient circulating device |
-
2020
- 2020-09-28 CN CN202011042112.5A patent/CN112066586A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930752A (en) * | 2015-05-29 | 2015-09-23 | 浙江工业大学 | Jet-compression refrigerating system driven through low-grade heat energy of supercooler |
| FR3049338A1 (en) * | 2016-03-23 | 2017-09-29 | Univ Shanghai Ocean | SELF-CASCADE AND EJECTION REFRIGERATION DEVICE FOR LOST HEAT RECOVERY OF CANBOR THRU |
| CN108007009A (en) * | 2017-11-07 | 2018-05-08 | 西安交通大学 | A kind of the solar-energy jet-type waring and cooling air conditioning system and operational mode of waste heat auxiliary |
| CN108106048A (en) * | 2018-01-11 | 2018-06-01 | 西安交通大学 | A kind of injector expansion self-cascade refrigeration system system and the course of work |
| CN110360639A (en) * | 2019-06-11 | 2019-10-22 | 太原理工大学 | Direct-expansion type solar energy injection couples heating and cooling device with compression |
| CN214039029U (en) * | 2020-09-28 | 2021-08-24 | 浙江工业大学 | Multi-refrigerant efficient circulating device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357846A (en) * | 2021-06-08 | 2021-09-07 | 南京工业大学 | Liquid separation condensation injection-compression refrigeration cycle system |
| CN113357845A (en) * | 2021-06-08 | 2021-09-07 | 南京工业大学 | Liquid separation condensation compression-injection refrigeration cycle system |
| CN113654262A (en) * | 2021-08-31 | 2021-11-16 | 嵊州市浙江工业大学创新研究院 | Low-grade heat-driven refrigerating system for large-scale freezer |
| CN113654262B (en) * | 2021-08-31 | 2022-06-21 | 嵊州市浙江工业大学创新研究院 | Low-grade heat-driven refrigerating system for large-scale freezer |
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