CN111121133A - Hot water combined supply system applied by low-grade multi-heat source combination and control method thereof - Google Patents
Hot water combined supply system applied by low-grade multi-heat source combination and control method thereof Download PDFInfo
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- CN111121133A CN111121133A CN202010010685.3A CN202010010685A CN111121133A CN 111121133 A CN111121133 A CN 111121133A CN 202010010685 A CN202010010685 A CN 202010010685A CN 111121133 A CN111121133 A CN 111121133A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 210
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000002918 waste heat Substances 0.000 claims abstract description 78
- 239000003507 refrigerant Substances 0.000 claims abstract description 68
- 238000011084 recovery Methods 0.000 claims abstract description 17
- 238000005338 heat storage Methods 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000010257 thawing Methods 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 230000003020 moisturizing effect Effects 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 230000032258 transport Effects 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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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
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/32—Heat sources or energy sources involving multiple heat sources in combination or as alternative heat sources
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- 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)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a hot water combined supply system for low-grade multi-heat source combined application, which comprises a refrigerant circulating unit, a hot water unit and a waste heat unit, wherein the refrigerant circulating unit is connected with the hot water unit; the refrigerant circulating unit is connected with the hot water unit through a plate heat exchanger, and the waste heat unit is connected with the refrigerant circulating unit through a double-channel heat exchanger. The invention also discloses a control method of the hot water combined supply system applied by the low-grade multi-heat source combination. The evaporator of the refrigerant circulating unit adopts the double-channel heat exchanger, the heat recovered by the waste heat recovery device is transferred to the double-channel heat exchanger through the waste heat water pump to serve as a main low-level heat source of the refrigerant circulating unit while the solar energy is fully utilized, the frosting problem of the evaporator of the air source heat pump is solved, the low-grade energy is reasonably utilized, the advantages of the solar energy, the waste heat of a data center and the air energy are complemented, and the energy efficiency of the system is greatly improved while the system is ensured to stably supply hot water.
Description
Technical Field
The invention relates to the technical field of heat pumps, in particular to a low-grade multi-heat-source combined hot water combined supply system and a control method thereof.
Background
The air source heat pump has the advantages of energy conservation, environmental protection, reliable performance and the like, is gradually widely applied to building heating and domestic hot water supply, but has obvious energy efficiency attenuation and serious frosting problem under outdoor low-temperature condition, and is difficult to stably meet the heating requirement.
The solar energy is one of the most environment-friendly energy sources, is inexhaustible and inexhaustible, is discontinuous and unstable, has certain limitation when being used alone, and still needs other heat sources for auxiliary heating to meet all-weather heating and hot water supply.
The data center has high energy consumption and large waste heat quantity, and is close to heat utilization areas such as commercial areas and residential areas, so the data center is an excellent waste heat source.
The peak valley of the heat supply capacity of the solar energy and the waste heat of the data center has certain complementarity, the air energy fluctuation is small but the quality is low, and the heat pump technology combined and applied by various heat sources can make up for the defects of various technologies and realize stable heat supply.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the low-grade multi-heat-source combined hot water combined supply system and the control method thereof, which reasonably utilize low-grade energy, complement the advantages of solar energy, data center waste heat and air energy, and greatly improve the energy efficiency of the system while ensuring that the system stably supplies hot water.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the combined hot water supply system for the low-grade multi-heat source combined application comprises a refrigerant circulating unit, a hot water unit and a waste heat unit; the refrigerant circulating unit is connected with the hot water unit through a plate heat exchanger, and the waste heat unit is connected with the refrigerant circulating unit through a double-channel heat exchanger.
Preferably, the refrigerant circulating unit comprises a compressor, a plate type heat exchanger, a throttling device and a double-channel heat exchanger; the hot water unit comprises a heat storage water tank, a first hot water pump, a plate heat exchanger, a first electromagnetic valve, a second electromagnetic valve, a solar heat collector, a second hot water pump and a water replenishing pump; the waste heat unit comprises a waste heat recovery device, a waste heat water pump and a double-channel heat exchanger.
Preferably, an outlet of the compressor is connected with the plate heat exchanger, the plate heat exchanger is connected with the throttling device, the throttling device is connected with the double-channel heat exchanger, and the double-channel heat exchanger is connected with an inlet of the compressor to form a refrigerant circulating unit; the solar water heater comprises a heat storage water tank, a plate heat exchanger, a first electromagnetic valve, a second hot water pump, a water replenishing pump, a solar heat collector and a water replenishing pump, wherein the heat storage water tank is connected with the first hot water pump; the waste heat recovery device is connected with the waste heat water pump, the waste heat water pump is connected with the double-channel heat exchanger, and the double-channel heat exchanger is connected with the waste heat recovery device to form a waste heat unit.
Preferably, the adjacent channels of the plate heat exchanger respectively flow through the refrigerant and the water, and the water flow direction is opposite to the refrigerant flow direction; the throttling device is an electronic expansion valve, a thermal expansion valve or a capillary tube; the dual-channel heat exchanger mainly comprises a refrigerant channel, a waste heat defrosting channel and fins, wherein the refrigerant channel and the waste heat defrosting channel are formed by connecting copper pipes, the fins parallel to the cross section direction of the copper pipes are arranged on the copper pipes, the refrigerant channel and the waste heat defrosting channel respectively flow through a refrigerant and water, and the flow direction of the water is opposite to that of the refrigerant.
Preferably, the solar heat collector is a vacuum tube solar heat collector with double-layer glass and vacuum heat insulation in the middle, and heat absorbed by the glass tube is not transferred outwards but only transferred to water in the glass tube.
The control method of the hot water combined supply system based on the low-grade multi-heat source combined application is realized based on the hot water combined supply system, and three operation modes of solar independent heat supply, double-source heat supply and three-source heat supply can be obtained by switching the electromagnetic valve and the water pump.
Preferably, when the intensity of solar radiation is higher, the hot water unit is started, and the system runs a solar independent heating mode; under the independent heat supply mode of solar energy, close first solenoid valve, first hot-water pump and waste heat water pump, open second solenoid valve, second hot-water pump and moisturizing pump, solar collector absorbs the heat and heats up water, and hot water after the intensification passes through the second hot-water pump and transports in the middle of the heat storage water tank, accomplishes the independent heat supply of solar energy.
Preferably, when no light is emitted, the refrigerant circulation unit, the waste heat unit and the hot water unit are started, and the system runs a double-source heat supply mode; under the double-source heat supply mode, a first electromagnetic valve, a second electromagnetic valve, a first hot water pump, a waste heat water pump and a water replenishing pump are opened, the second hot water pump is closed, the waste heat water pump conveys heat recovered by a waste heat recovery device to a waste heat defrosting channel of a double-channel heat exchanger, refrigerant in the refrigerant channel of the double-channel heat exchanger absorbs heat to be gasified, gasified refrigerant gas returns to a plate heat exchanger after being compressed by a compressor, high-temperature and high-pressure refrigerant in the plate heat exchanger exchanges heat with water to be heated and warmed in a hot water unit, and hot water after being warmed is conveyed to a heat storage water tank through the first hot water pump to finish double-source heat supply.
Preferably, when solar irradiation cannot independently meet the heat supply requirement, the refrigerant circulation unit, the waste heat unit and the hot water unit are started, and the system runs a three-source heat supply mode; in a three-source heat supply mode, a first electromagnetic valve, a second electromagnetic valve, a first hot water pump, a second hot water pump, a waste heat water pump and a water supplementing pump are started, a solar heat collector heats water for the first time, medium-temperature water after heating is conveyed into a heat storage water tank through the second hot water pump, medium-temperature water after heating for the first time is heated for the second time through the refrigerant circulation unit and the waste heat unit, and hot water after heating for the second time is conveyed into the heat storage water tank through the first hot water pump to complete three-source heat supply.
Compared with the prior art, the invention has the beneficial effects that:
1. the heat recovered by the waste heat recovery device is transferred to the double-channel heat exchanger through the waste heat water pump to serve as a main low-level heat source of the refrigerant circulation unit, and the waste heat of the data center is recovered and reused.
2. The evaporator of the refrigerant circulating unit adopts a double-channel heat exchanger, and the heat recovered by the waste heat recovery device is transferred to the double-channel heat exchanger through the waste heat water pump in a double-source heat supply mode and a three-source heat supply mode to serve as a main low-level heat source of the refrigerant circulating unit, so that the problem of frosting of the evaporator of the air source heat pump is thoroughly solved.
3. The solar heat collector is used for heating water for the first time, the medium-temperature water after being heated is conveyed to the heat storage water tank through the second hot water pump, the medium-temperature water after being heated for the first time is heated for the second time through the refrigerant circulating unit and the waste heat unit, and the hot water after being heated for the second time is conveyed to the heat storage water tank through the first hot water pump, so that the low-grade solar energy can be fully utilized.
Drawings
FIG. 1 is a schematic view of a combined hot water supply system according to an embodiment of the present invention;
FIG. 2 is a valve switching diagram of three operation modes of the combined hot water supply system according to the embodiment of the invention;
description of reference numerals: 1-a compressor; 2-a plate heat exchanger; 3-a throttling device; 4-double channel heat exchanger; 5-a heat storage water tank; 6-a first hot water pump; 7-a first solenoid valve; 8-a second solenoid valve; 9-a solar heat collector; 10-a second hot water pump; 11-a water replenishing pump; 12-a waste heat recovery device; 13-waste heat water pump.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the hot water cogeneration system for low-grade multi-heat source combined application of the present embodiment includes a refrigerant circulation unit, a hot water unit, a waste heat unit and a matching control module.
The refrigerant circulation unit is connected with the hot water unit through the plate heat exchanger 2, and the waste heat unit is connected with the refrigerant circulation unit through the double-channel heat exchanger 4.
The refrigerant cycle unit comprises a compressor 1, a plate heat exchanger 2, a throttling device 3 and a double-channel heat exchanger 4. The export of compressor 1 is connected with plate heat exchanger 2, and plate heat exchanger 2 is connected with throttling arrangement 3, and throttling arrangement 3 is connected with binary channels heat exchanger 4, and binary channels heat exchanger 4 is connected with the entry of compressor 1.
The hot water unit comprises a heat storage water tank 5, a first hot water pump 6, a plate heat exchanger 2, a first electromagnetic valve 7, a second electromagnetic valve 8, a solar heat collector 9, a second hot water pump 10 and a water replenishing pump 11. The heat storage water tank 5 is connected with a first hot water pump 6, the first hot water pump 6 is connected with a plate heat exchanger 2, the plate heat exchanger 2 is connected with a first electromagnetic valve 7, the first electromagnetic valve 7 is connected with a second electromagnetic valve 8, a second hot water pump 10 and a water replenishing pump 11, the second electromagnetic valve 8 is connected with the heat storage water tank 5, the second hot water pump 10 is connected with a solar heat collector 9, and the solar heat collector 9 is connected with the heat storage water tank 5.
The waste heat unit comprises a waste heat recovery device 12, a waste heat water pump 13 and a double-channel heat exchanger 4. The waste heat recovery device 12 is connected with a waste heat water pump 13, and the waste heat water pump 13 is connected with the double-channel heat exchanger 4. The waste heat recovery device 12 is used for recovering waste heat of the data center.
The adjacent channels of the plate heat exchanger 2 respectively flow refrigerant and water, and the water flow direction is opposite to the refrigerant flow direction. The throttle device 3 may be an electronic expansion valve, a thermostatic expansion valve, or a capillary tube. The double-channel heat exchanger 4 mainly comprises a refrigerant channel, a waste heat defrosting channel and fins, wherein the refrigerant channel and the waste heat defrosting channel are respectively formed by connecting copper pipes, the fins parallel to the cross section direction of the copper pipes are arranged on the copper pipes, the refrigerant channel and the waste heat defrosting channel respectively flow through refrigerant and water, and the flow direction of the water is opposite to that of the refrigerant.
The solar heat collector 9 is a vacuum tube solar heat collector 9 with double-layer glass and vacuum heat insulation in the middle, and heat absorbed by the glass tube is not transferred outwards but only transferred to water in the glass tube.
The refrigerant cycle unit evaporator adopts the double-channel heat exchanger 4, and the heat recovered by the waste heat recovery device 12 is transferred to the double-channel heat exchanger 4 through the waste heat water pump 13 to serve as a main low-level heat source of the refrigerant cycle unit while the solar energy is fully utilized, so that the frosting problem of the air source heat pump evaporator is thoroughly solved.
As shown in fig. 2, the low-grade multi-heat-source combined hot water cogeneration system of this embodiment can obtain three operation modes, i.e., solar independent heat supply, dual-source heat supply and three-source heat supply, by switching the electromagnetic valve and the water pump.
When the solar radiation intensity is high (the solar radiation meets the requirement of independent heat supply), the hot water unit is started, and the system operates the solar independent heat supply mode. In the solar independent heat supply mode, the first electromagnetic valve 7, the first hot water pump 6 and the residual heat water pump 13 are closed, the second electromagnetic valve 8, the second hot water pump 10 and the water replenishing pump 11 are opened, the solar heat collector 9 absorbs heat to heat water, and the heated hot water is conveyed to the heat storage water tank 5 through the second hot water pump 10, so that solar independent heat supply is completed.
When no light is emitted, the refrigerant circulation unit, the waste heat unit and the hot water unit are started, and the system runs a double-source heat supply mode. Under the double-source heat supply mode, a first electromagnetic valve 7, a second electromagnetic valve 8, a first hot water pump 6, a residual heat water pump 13 and a water replenishing pump 11 are opened, a second hot water pump 10 is closed, the residual heat water pump 13 conveys heat recovered by a residual heat recovery device 12 to a residual heat defrosting channel of a double-channel heat exchanger 4, refrigerant in the refrigerant channel of the double-channel heat exchanger 4 absorbs heat for gasification, the gasified refrigerant gas returns to a plate heat exchanger 2 after being compressed by a compressor 1, high-temperature and high-pressure refrigerant in the plate heat exchanger 2 exchanges heat with water to be heated and warmed in a hot water unit, and the warmed hot water is conveyed to a heat storage water tank 5 through the first hot water pump 6, so that double-source heat supply is completed.
When solar irradiation can not independently satisfy the heat supply requirement, the refrigerant circulation unit, the waste heat unit and the hot water unit are started, and the system runs a three-source heat supply mode. In the three-source heat supply mode, the first electromagnetic valve 7 and the second electromagnetic valve 8 are opened, the first hot water pump 6, the second hot water pump 10, the residual heat water pump 13 and the water replenishing pump 11 are opened, the solar heat collector 9 heats water for the first time, the heated intermediate-temperature water is conveyed to the heat storage water tank 5 through the second hot water pump 10, the heated intermediate-temperature water is heated for the second time through the refrigerant circulation unit and the residual heat unit (principle is same as the two-source heat supply mode), and the heated hot water is conveyed to the heat storage water tank 5 through the first hot water pump 6, so that the three-source heat supply is completed.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (9)
1. The combined hot water supply system for the low-grade multi-heat source combined application is characterized in that: the system comprises a refrigerant circulating unit, a hot water unit and a waste heat unit; the refrigerant circulating unit is connected with the hot water unit through a plate heat exchanger, and the waste heat unit is connected with the refrigerant circulating unit through a double-channel heat exchanger.
2. The combined hot water supply system according to claim 1, wherein: the refrigerant circulating unit comprises a compressor, a plate type heat exchanger, a throttling device and a double-channel heat exchanger; the hot water unit comprises a heat storage water tank, a first hot water pump, a plate heat exchanger, a first electromagnetic valve, a second electromagnetic valve, a solar heat collector, a second hot water pump and a water replenishing pump; the waste heat unit comprises a waste heat recovery device, a waste heat water pump and a double-channel heat exchanger.
3. The combined hot water supply system according to claim 2, wherein: the outlet of the compressor is connected with the plate heat exchanger, the plate heat exchanger is connected with the throttling device, the throttling device is connected with the double-channel heat exchanger, and the double-channel heat exchanger is connected with the inlet of the compressor to form a refrigerant circulating unit; the solar water heater comprises a heat storage water tank, a plate heat exchanger, a first electromagnetic valve, a second hot water pump, a water replenishing pump, a solar heat collector and a water replenishing pump, wherein the heat storage water tank is connected with the first hot water pump; the waste heat recovery device is connected with the waste heat water pump, the waste heat water pump is connected with the double-channel heat exchanger, and the double-channel heat exchanger is connected with the waste heat recovery device to form a waste heat unit.
4. The combined hot water supply system according to claim 2, wherein: the adjacent channels of the plate heat exchanger respectively flow through the refrigerant and water, and the flow direction of the water is opposite to that of the refrigerant; the throttling device is an electronic expansion valve, a thermal expansion valve or a capillary tube; the dual-channel heat exchanger mainly comprises a refrigerant channel, a waste heat defrosting channel and fins, wherein the refrigerant channel and the waste heat defrosting channel are formed by connecting copper pipes, the fins parallel to the cross section direction of the copper pipes are arranged on the copper pipes, the refrigerant channel and the waste heat defrosting channel respectively flow through a refrigerant and water, and the flow direction of the water is opposite to that of the refrigerant.
5. The combined hot water supply system according to claim 2, wherein: the solar heat collector is a vacuum tube solar heat collector with double-layer glass and vacuum heat insulation in the middle, and heat absorbed by the glass tube is not transferred outwards but only transferred to water in the glass tube.
6. The control method of the combined hot water supply system for the combined application of the low-grade multiple heat sources is realized based on the combined hot water supply system of claim 2, and is characterized in that: three operation modes of solar independent heat supply, double-source heat supply and three-source heat supply can be obtained by switching the electromagnetic valve and the water pump.
7. The control method according to claim 6, characterized in that: when the solar radiation intensity is higher, the hot water unit is started, and the system runs a solar independent heating mode; under the independent heat supply mode of solar energy, close first solenoid valve, first hot-water pump and waste heat water pump, open second solenoid valve, second hot-water pump and moisturizing pump, solar collector absorbs the heat and heats up water, and hot water after the intensification passes through the second hot-water pump and transports in the middle of the heat storage water tank, accomplishes the independent heat supply of solar energy.
8. The control method according to claim 6, characterized in that: when no light is emitted, the refrigerant circulation unit, the waste heat unit and the hot water unit are started, and the system runs a double-source heat supply mode; under the double-source heat supply mode, a first electromagnetic valve, a second electromagnetic valve, a first hot water pump, a waste heat water pump and a water replenishing pump are opened, the second hot water pump is closed, the waste heat water pump conveys heat recovered by a waste heat recovery device to a waste heat defrosting channel of a double-channel heat exchanger, refrigerant in the refrigerant channel of the double-channel heat exchanger absorbs heat to be gasified, gasified refrigerant gas returns to a plate heat exchanger after being compressed by a compressor, high-temperature and high-pressure refrigerant in the plate heat exchanger exchanges heat with water to be heated and warmed in a hot water unit, and hot water after being warmed is conveyed to a heat storage water tank through the first hot water pump to finish double-source heat supply.
9. The control method according to claim 6, characterized in that: when solar irradiation cannot independently meet the heat supply requirement, the refrigerant circulation unit, the waste heat unit and the hot water unit are started, and the system runs a three-source heat supply mode; in a three-source heat supply mode, a first electromagnetic valve, a second electromagnetic valve, a first hot water pump, a second hot water pump, a waste heat water pump and a water supplementing pump are started, a solar heat collector heats water for the first time, medium-temperature water after heating is conveyed into a heat storage water tank through the second hot water pump, medium-temperature water after heating for the first time is heated for the second time through the refrigerant circulation unit and the waste heat unit, and hot water after heating for the second time is conveyed into the heat storage water tank through the first hot water pump to complete three-source heat supply.
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| CN202010010685.3A CN111121133A (en) | 2020-01-06 | 2020-01-06 | Hot water combined supply system applied by low-grade multi-heat source combination and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022116608A1 (en) * | 2021-07-12 | 2022-06-09 | 中国科学院广州能源研究所 | System and method for combined renewable energy source and waste heat utilization for data center |
| CN114879825A (en) * | 2022-04-26 | 2022-08-09 | Oppo广东移动通信有限公司 | Energy utilization system, method and device |
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