CN114001489A - Solar jet type refrigeration power-cooling combined supply system - Google Patents
Solar jet type refrigeration power-cooling combined supply system Download PDFInfo
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- CN114001489A CN114001489A CN202111181175.3A CN202111181175A CN114001489A CN 114001489 A CN114001489 A CN 114001489A CN 202111181175 A CN202111181175 A CN 202111181175A CN 114001489 A CN114001489 A CN 114001489A
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- 238000001816 cooling Methods 0.000 title claims abstract description 38
- 238000005057 refrigeration Methods 0.000 title claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000012530 fluid Substances 0.000 claims abstract description 26
- 239000011555 saturated liquid Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229920006395 saturated elastomer Polymers 0.000 claims description 8
- 238000009792 diffusion process Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/30—Thermophotovoltaic systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
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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
- Y02E10/50—Photovoltaic [PV] energy
-
- 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
- Y02E10/60—Thermal-PV hybrids
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to a solar jet type refrigeration power-cooling combined supply system, and belongs to the technical field of solar energy and energy conservation. The system consists of a solar heat collection cycle A and a power-cooling combined supply cycle B; the solar heat collection circulation A comprises a water storage tank, a circulating pump, a solar heat collector and a flow divider, and the power-cooling combined supply circulation B comprises a condenser, a low-pressure liquid supply pump, a low-pressure generator, a gas-liquid separator, a high-pressure liquid supply pump, a high-pressure generator, a steam superheater, a primary turbine, a secondary turbine, an ejector, a refrigeration evaporator and a throttle valve. According to the invention, the work-cooling composite cycle is constructed based on the ORC power cycle and the ERC refrigeration cycle, and meanwhile, the intermediate extraction of the first-stage turbine is used as the working fluid of the ejector to drive the jet type refrigeration system, so that the refrigerating capacity is increased.
Description
Technical Field
The invention relates to a solar jet type refrigeration power-cooling combined supply system, and belongs to the technical field of solar energy and energy conservation.
Background
The overuse of fossil energy and the global energy and environment are becoming more and more severe, and at the same time, the overuse of fossil energy also becomes a key factor restricting social progress and economic development. The development and utilization of renewable energy sources can effectively reduce the emission of greenhouse gases and protect the storage of fossil fuels, and among the renewable energy sources, the solar energy is widely distributed and rich in energy, and the total solar energy radiation accepted by the earth in one year is about ten times of that of all the fossil fuels.
At present, the solar energy is mainly utilized in the forms of solar photovoltaic power generation, solar heat utilization and solar photovoltaic comprehensive utilization. In solar heat utilization, solar jet refrigeration is one of the most common utilization modes, wherein an ejector is used as a key component of jet refrigeration, has the characteristics of simple structure and reliable performance, and is used in many related researches. Meanwhile, numerous scholars such as Bertrand and Daniel research low-temperature solar ORC systems and research various working media, and the working media such as R134a, R600a and R152a are found to be suitable for the system. But the existing solar jet refrigeration still has the defects of high investment and low economic benefit.
With the development of integrated space and the gradual diversification of energy demand ends, the invention provides a solar jet refrigeration power-cooling combined supply system with multiple energy output forms based on the ORC and jet refrigeration system, and the solar energy can be reasonably utilized and simultaneously can meet various energy demands.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the invention provides a solar jet type refrigeration power-cooling combined supply system. According to the invention, the work-cooling composite cycle is constructed based on the ORC power cycle and the ERC refrigeration cycle, and meanwhile, the intermediate extraction of the first-stage turbine is used as the working fluid of the ejector to drive the jet type refrigeration system, so that the refrigerating capacity is increased. The invention is realized by the following technical scheme.
A solar jet refrigeration power-cooling combined supply system is composed of a solar heat collection cycle A and a power-cooling combined supply cycle B; the solar heat collection cycle A comprises a water storage tank 12, a circulating pump 13, a solar heat collector 14 and a flow divider 15, and the power-cooling combined supply cycle B comprises a condenser 1, a low-pressure liquid supply pump 2, a low-pressure generator 3, a gas-liquid separator 4, a high-pressure liquid supply pump 5, a high-pressure generator 6, a steam superheater 7, a primary turbine 8, a secondary turbine 9, an ejector 10, a refrigeration evaporator 11 and a throttling valve;
in the solar heat collection cycle A, a circulating water outlet of a water storage tank 12 is pressurized by a circulating pump 13 and is connected with a heating circulating water inlet of the solar heat collection cycle A, the heating circulating water outlet of the solar heat collection cycle A is divided into two paths by a splitter, one path is connected with a heat source inlet of a high-pressure generator 6 in a power-cooling combined supply cycle B, the other path is connected with a heat source inlet of a low-pressure generator 3 in the power-cooling combined supply cycle B, circulating water flowing out of a heat source outlet of the high-pressure generator 6 and a heat source outlet of the low-pressure generator 3 is connected with a circulating water inlet of the water storage tank 12, and the circulation of a solar heat collection system is completed;
a saturated liquid working medium outlet of a condenser 1 in a power-cooling combined supply cycle B is divided into two paths, one path is connected with a working medium inlet of a low-pressure generator 3 through a low-pressure liquid supply pump 2, a saturated working medium outlet of the low-pressure generator 3 is connected with a saturated working medium inlet of a gas-liquid separator 4, a working medium liquid outlet of the gas-liquid separator 4 is connected with a working medium liquid inlet of a high-pressure generator 6 through a high-pressure liquid supply pump 5, a steam working medium outlet of the high-pressure generator 6 is connected with an inlet of a steam superheater 7, a steam outlet of the steam superheater 7 enters a primary turbine 8 for turbine expansion to do work, part of the working medium steam which is not completely expanded in the primary turbine 8 is pumped out and enters an ejector 10 through a throttling valve I16 to be used as working fluid, the steam which flows out after being completely expanded in the primary turbine 8 is mixed with the working medium steam in the gas-liquid separator 4 and then enters a secondary turbine 9, and the other path of the saturated liquid working medium outlet of the condenser 1 sequentially passes through a throttling valve II 17, The refrigeration evaporator 11 enters the ejector 10 to be used as an injection fluid, the working fluid and the injection fluid in the ejector 10 enter the mixing section, after the mixing is completed in the mixing section, the working fluid and the injection fluid enter the diffusion section to continue to decelerate and expand and then flow out from the outlet of the ejector 10, after the secondary turbine 9 is completely expanded, the exhaust steam flowing out is mixed with the fluid at the outlet of the ejector 10 in an isobaric manner and then enters the condenser 1 to be condensed and released heat, and the power-cooling combined cycle is completed.
And the saturated liquid working medium of the condenser 1 is R161.
The working principle of the internal combustion engine waste heat recovery power-cooling combined supply system is as follows:
in the solar heat collection cycle A, circulating water is pressurized by a circulating pump from a water storage tank and flows into a flow divider 15 after being heated by a solar heat collector 14, two strands of hot water after flow division respectively enter a high-pressure generator 6 and a low-pressure generator 3 to release heat, the two strands of hot water are mixed after heat release and flow into a water storage tank 12, and then the hot water is pressurized by a circulating pump 13 to circulate, so that the circulation of a solar heat collection system is completed.
In the power-cooling combined supply circulation system B, a saturated liquid working medium flowing out of a condenser 1 is divided into two paths, one path of the saturated liquid working medium is pressurized by a low-pressure pump 2, enters a low-pressure generator 3 to absorb heat and evaporate, then enters a gas-liquid separator 4, working medium liquid flows out of the bottom of the gas-liquid separator 4, the other path of the saturated liquid working medium is pressurized by a high-pressure pump 5, then enters a high-pressure evaporator 6 to absorb heat and evaporate to form saturated working medium steam 7, then enters a superheater 7 to absorb heat to form superheated steam, then enters a first-stage turbine 8 to expand and do work, part of the working medium steam which is not completely expanded is pumped out to enter an ejector 10 to be used as working fluid to suck the injection fluid, and the rest steam flows out of the first-stage turbine 8 after being completely expanded in the turbine. Steam discharged by the first-stage turbine 8 is mixed with saturated steam flowing out of the top of the gas-liquid separator 4, then enters the second-stage turbine 9 to expand and do work, and the steam discharged by the second-stage turbine is mixed with an outlet fluid of the ejector 10 in an isobaric manner; and the other path of saturated liquid working medium is decompressed and throttled by a throttle valve II 17, enters a refrigeration evaporator 11 for evaporation and refrigeration, enters an ejector as injection fluid, is subjected to isentropic expansion, enters a suction cavity, then enters a mixing section, is mixed in the mixing section, enters a diffusion section, is subjected to continuous deceleration expansion, flows out of the ejector 10, is mixed with exhaust gas at the outlet of a secondary turbine 9 at constant pressure, enters a condenser 1 for condensation and heat release, and thus the circulation process of the power-cooling combined supply system is completed.
The invention has the beneficial effects that:
(1) the system utilizes the intermediate extraction of the first-stage turbine as the working fluid of the ejector to drive the jet type refrigerating system, thereby increasing the refrigerating capacity;
(2) the system can change the ratio of the output work capacity to the cold capacity of the system by adjusting the flow ratio of the steam in the gas-liquid separator, so that the operation and the regulation of the system are more flexible;
(3) the system utilizes solar heat energy and photovoltaic power generation to form a solar heat collector as a key part of solar jet refrigeration, and has the characteristics of simple structure and reliable performance, and simultaneously, the system is more compact;
(4) the system has the advantages that the ORC power cycle and the ERC refrigeration cycle construct a power-cooling composite cycle, so that waste heat is utilized more efficiently.
Drawings
Fig. 1 is a schematic structural diagram of a solar jet refrigeration power-cooling combined supply system according to the present invention.
In the figure: the system comprises a condenser 1, a low-pressure liquid supply pump 2, a low-pressure generator 3, a gas-liquid separator 4, a high-pressure liquid supply pump 5, a high-pressure generator 6, a steam superheater 7, a primary turbine 8, a secondary turbine 9, an ejector 10, a refrigeration evaporator 11, a water storage tank 12, a circulating pump 13, a solar heat collector 14, a flow divider 15, a throttling valve I16 and a throttling valve II 17.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Example 1
As shown in fig. 1, the solar jet refrigeration power-cooling combined supply system is composed of a solar heat collection cycle a and a power-cooling combined supply cycle B; the solar heat collection cycle A comprises a water storage tank 12, a circulating pump 13, a solar heat collector 14 and a flow divider 15, and the power-cooling combined supply cycle B comprises a condenser 1, a low-pressure liquid supply pump 2, a low-pressure generator 3, a gas-liquid separator 4, a high-pressure liquid supply pump 5, a high-pressure generator 6, a steam superheater 7, a primary turbine 8, a secondary turbine 9, an ejector 10, a refrigeration evaporator 11 and a throttling valve;
in the solar heat collection cycle A, a circulating water outlet of a water storage tank 12 is pressurized by a circulating pump 13 and is connected with a heating circulating water inlet of the solar heat collection cycle A, the heating circulating water outlet of the solar heat collection cycle A is divided into two paths by a splitter, one path is connected with a heat source inlet of a high-pressure generator 6 in a power-cooling combined supply cycle B, the other path is connected with a heat source inlet of a low-pressure generator 3 in the power-cooling combined supply cycle B, circulating water flowing out of a heat source outlet of the high-pressure generator 6 and a heat source outlet of the low-pressure generator 3 is connected with a circulating water inlet of the water storage tank 12, and the circulation of a solar heat collection system is completed;
a saturated liquid working medium outlet of a condenser 1 in a power-cooling combined supply cycle B is divided into two paths, one path is connected with a working medium inlet of a low-pressure generator 3 through a low-pressure liquid supply pump 2, a saturated working medium outlet of the low-pressure generator 3 is connected with a saturated working medium inlet of a gas-liquid separator 4, a working medium liquid outlet of the gas-liquid separator 4 is connected with a working medium liquid inlet of a high-pressure generator 6 through a high-pressure liquid supply pump 5, a steam working medium outlet of the high-pressure generator 6 is connected with an inlet of a steam superheater 7, a steam outlet of the steam superheater 7 enters a primary turbine 8 for turbine expansion to do work, part of the working medium steam which is not completely expanded in the primary turbine 8 is pumped out and enters an ejector 10 through a throttling valve I16 to be used as working fluid, the steam which flows out after being completely expanded in the primary turbine 8 is mixed with the working medium steam in the gas-liquid separator 4 and then enters a secondary turbine 9, and the other path of the saturated liquid working medium outlet of the condenser 1 sequentially passes through a throttling valve II 17, The refrigeration evaporator 11 enters the ejector 10 to be used as an injection fluid, the working fluid and the injection fluid in the ejector 10 enter the mixing section, after the mixing is completed in the mixing section, the working fluid and the injection fluid enter the diffusion section to continue to decelerate and expand and then flow out from the outlet of the ejector 10, after the secondary turbine 9 is completely expanded, the exhaust steam flowing out is mixed with the fluid at the outlet of the ejector 10 in an isobaric manner and then enters the condenser 1 to be condensed and released heat, and the power-cooling combined cycle is completed.
Wherein the saturated liquid working medium of the condenser 1 is R161.
When the ambient temperature is increased to 19 DEG CThe environment is 31 ℃, the efficiency of the solar heat collector 14 is increased from 52.18% to 62.85% along with the increase of the environment temperature, and the required incident solar radiation energy is reduced from 44.47kW to 36.92kW under the input heat of the power-cooling combined cycle system B; at the same time, since the heat conversion rate per unit area is increased, the area of the heat collecting plate of the solar heat collector 14 is from 63.53m2Reduced to 52.78m2(ii) a At this time, the increase of the ambient temperature reduces exergy loss caused by the temperature difference between the system and the environment, so that the exergy efficiency of the combined heat and power cycle system B is increased from 36.67% to 47.18%.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (2)
1. The utility model provides a solar energy sprays formula refrigeration merit combined cooling system which characterized in that: the solar energy heat collecting device consists of a solar energy heat collecting cycle (A) and a power-cooling combined supply cycle (B); the solar heat collection cycle (A) comprises a water storage tank (12), a circulating pump (13), a solar heat collector (14) and a flow divider (15), and the power-cooling combined supply cycle (B) comprises a condenser (1), a low-pressure liquid supply pump (2), a low-pressure generator (3), a gas-liquid separator (4), a high-pressure liquid supply pump (5), a high-pressure generator (6), a steam superheater (7), a primary turbine (8), a secondary turbine (9), an ejector (10), a refrigeration evaporator (11) and a throttle valve;
in the solar heat collection cycle (A), a circulating water outlet of a water storage tank (12) is pressurized through a circulating pump (13) and is connected with a heating circulating water inlet of the solar heat collection cycle (A), the heating circulating water outlet of the solar heat collection cycle (A) is divided into two paths through a splitter, one path of the heating circulating water outlet is connected with a heat source inlet of a high-pressure generator (6) in a power-cooling combined supply cycle (B), the other path of the heating circulating water outlet is connected with a heat source inlet of a low-pressure generator (3) in the power-cooling combined supply cycle (B), circulating water flowing out of a heat source outlet of the high-pressure generator (6) and a heat source outlet of the low-pressure generator (3) is connected with the circulating water inlet of the water storage tank (12), and the circulation of a solar heat collection system is completed;
a saturated liquid working medium outlet of a condenser (1) in a power-cooling combined supply cycle (B) is divided into two paths, one path is connected with a working medium inlet of a low-pressure generator (3) through a low-pressure liquid supply pump (2), a saturated working medium outlet of the low-pressure generator (3) is connected with a saturated working medium inlet of a gas-liquid separator (4), a working medium liquid outlet of the gas-liquid separator (4) is connected with a working medium liquid inlet of a high-pressure generator (6) through a high-pressure liquid supply pump (5), a steam working medium outlet of the high-pressure generator (6) is connected with an inlet of a steam superheater (7), a steam outlet of the steam superheater (7) enters a first-stage turbine (8) to perform turbine expansion and work, working medium steam which is not completely expanded in the first-stage turbine (8) is pumped out to enter an ejector (10) through a throttling valve I (16) to be used as working fluid, the steam which flows out after being completely expanded in the first-stage turbine (8) is mixed with working medium steam in the gas-liquid separator (4) and then enters a second-stage turbine (9), the other path of the saturated liquid working medium outlet of the condenser (1) sequentially passes through the throttle valve II (17) and the refrigeration evaporator (11) and enters the ejector (10) as an injection fluid, the working fluid and the injection fluid in the ejector (10) enter the mixing section, are mixed in the mixing section and then enter the diffusion section to continue to decelerate and expand, and then flow out from the outlet of the ejector (10), the exhaust steam flowing out after the secondary turbine (9) is fully expanded is isobarically mixed with the fluid at the outlet of the ejector (10) and then enters the condenser (1) to be condensed and released, and the combined cooling and power cycle is completed.
2. The solar ejector refrigeration power-cooling combined supply system according to claim 1, wherein: and the saturated liquid working medium of the condenser (1) is R161.
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| CN202111181175.3A CN114001489A (en) | 2021-10-11 | 2021-10-11 | Solar jet type refrigeration power-cooling combined supply system |
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| CN202111181175.3A CN114001489A (en) | 2021-10-11 | 2021-10-11 | Solar jet type refrigeration power-cooling combined supply system |
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Citations (6)
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|---|---|---|---|---|
| CN101153757A (en) * | 2006-09-28 | 2008-04-02 | 上海理工大学 | Novel solar gas-injection refrigerating system |
| CN101187509A (en) * | 2007-12-06 | 2008-05-28 | 上海交通大学 | Integral type jet type low temperature residual heat generation refrigeration device |
| CN101871440A (en) * | 2010-06-13 | 2010-10-27 | 上海交通大学 | Solar energy-natural gas complementary injection type distributed combined cold heat and power supply device |
| CN203396149U (en) * | 2013-06-06 | 2014-01-15 | 昆明理工大学 | Solar two-stage ejection type refrigerating system with heat regenerator |
| CN108643981A (en) * | 2018-04-09 | 2018-10-12 | 西安交通大学 | A kind of low-grade heat source driving non-azeotropic mixed working medium cogeneration system and method |
| CN112629066A (en) * | 2020-12-02 | 2021-04-09 | 浙江省送变电工程有限公司 | Solar-driven pressurizing injection refrigerating system |
-
2021
- 2021-10-11 CN CN202111181175.3A patent/CN114001489A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153757A (en) * | 2006-09-28 | 2008-04-02 | 上海理工大学 | Novel solar gas-injection refrigerating system |
| CN101187509A (en) * | 2007-12-06 | 2008-05-28 | 上海交通大学 | Integral type jet type low temperature residual heat generation refrigeration device |
| CN101871440A (en) * | 2010-06-13 | 2010-10-27 | 上海交通大学 | Solar energy-natural gas complementary injection type distributed combined cold heat and power supply device |
| CN203396149U (en) * | 2013-06-06 | 2014-01-15 | 昆明理工大学 | Solar two-stage ejection type refrigerating system with heat regenerator |
| CN108643981A (en) * | 2018-04-09 | 2018-10-12 | 西安交通大学 | A kind of low-grade heat source driving non-azeotropic mixed working medium cogeneration system and method |
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