CN108954821B - Air circulation open type heat pump hot water preparation method - Google Patents
Air circulation open type heat pump hot water preparation method Download PDFInfo
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- CN108954821B CN108954821B CN201810919365.2A CN201810919365A CN108954821B CN 108954821 B CN108954821 B CN 108954821B CN 201810919365 A CN201810919365 A CN 201810919365A CN 108954821 B CN108954821 B CN 108954821B
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- air
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- hot water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000002360 preparation method Methods 0.000 title description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract 3
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 239000008236 heating water Substances 0.000 abstract description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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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
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/004—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being air
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a method for preparing hot water of an open heat pump with air circulation, which comprises the steps of preheating air in one stage by using a heat regenerator, then compressing the air in two stages by using a first air compressor, a second air compressor and a turbine air compression part to prepare high-temperature air, carrying out heat exchange twice by using an intermediate heat exchanger and an air/water heat exchanger to complete heating of circulating water, and preparing building heating water and domestic hot water with the temperature of more than 60 ℃ in cold and severe cold areas.
Description
Technical Field
The invention relates to a hot water preparation method, in particular to an open heat pump hot water preparation method of air circulation.
Background
At this stage, global warming concerns and environmental protection issues are becoming more and more important. The heat pump is a cold and hot multiplexing device and can meet the diversified demands of refrigeration, heating and domestic hot water. However, in terms of the selection of refrigerant, both the environmental protection and the effect on efficiency must be considered, and HCFC (chlorofluorocarbon) refrigerants are now under more and more strict control. In addition, for the traditional vapor compression heat pump, the problem that the heating capacity is inconsistent with the change of the building heat load exists, when the outdoor environment temperature is reduced, the building heat load is increased, but the heating capacity of the traditional vapor compression heat pump is greatly reduced, and the efficiency is very low.
The air circulation system takes air as a refrigerating medium, the air storage capacity is rich and the environment is not polluted, the circulation flow of the system is more flexible than that of the traditional refrigerating system, the system is relatively optimized and transformed by combining with the actual situation more easily, various circulation flows can be adopted according to different use purposes and requirements, the refrigerating capacity and the refrigerating temperature are easy to adjust, the operation and maintenance are simple, and the heating capacity of the air circulation after the optimization design can be kept consistent with the change trend of the heat load of the building.
Disclosure of Invention
In order to solve the problem of insufficient ways of building heating and domestic hot water preparation in cold and severe cold regions, the invention provides an open heat pump hot water preparation method of air circulation, which prepares high-temperature air by utilizing one-stage preheating and two-stage compression, completes heating of circulating water through twice heat exchange, and can prepare building heating water and domestic hot water with the temperature of more than 60 ℃ in the cold and severe cold regions.
The technical scheme adopted by the invention for solving the technical problems is as follows: cold air in an atmospheric environment enters a heat regenerator through an air inlet, enters an air inlet end of a first air compressor after being preheated, is discharged from an exhaust end after being compressed and heated by the first air compressor, enters an intermediate heat exchanger, and first-time heating is carried out on circulating water flowing through the intermediate heat exchanger; the air is divided into two paths after being discharged from the intermediate heat exchanger, wherein one path of the air enters an air compressing component of the turbine air compressing component, and is discharged from an exhaust end after being compressed, heated and boosted by the air compressing component; the other path of air enters an air inlet end of a second air compressor, is compressed by the second air compressor, is heated and pressurized and then is discharged from an exhaust end, and the two paths of air are mixed in an air tee and then enter an air/water heat exchanger; the high-temperature and high-pressure air releases heat in the air/water heat exchanger, circulating water flowing through the air/water heat exchanger is heated for the second time, the air with the reduced temperature enters the heat regenerator, the heat is further released in the heat regenerator, cold air entering the heat regenerator through the air inlet is preheated, finally the air enters a turbine part of the turbine air compression part, the air is changed into low-temperature and low-pressure air after acting in the turbine part, and the low-temperature and low-pressure air is discharged into the atmospheric environment through the air outlet to complete air circulation.
Circulating water flows through the intermediate heat exchanger under the action of the circulating water pump, is heated for the first time in the intermediate heat exchanger, then enters the air/water heat exchanger, is heated for the second time by high-temperature and high-pressure air in the air/water heat exchanger, and then returns to the hot water tank through a water pipeline. The water supply port of the hot water tank is connected with domestic hot water supply or heating hot water supply of a user, and the water return port is connected with tap water or heating hot water return. When the water temperature in the hot water tank reaches a set value, the device stops running.
The invention has the beneficial effects that:
1. the exhaust gas of the first air compressor enters the intermediate heat exchanger to heat the circulating water flowing through the intermediate heat exchanger for the first time, and the exhaust gas enters the second air compressor and the turbine air compressing part after being cooled, so that on one hand, the inlet temperatures of the second air compressor and the turbine air compressing part can be reduced, the running conditions of the second air compressor and the turbine air compressing part can be improved, on the other hand, the mass flow of the air sucked by the second air compressor and the turbine air compressing part can be increased, and the heating capacity of;
2. the heat regenerator is adopted to preheat outdoor air entering the equipment, so that the performance coefficient of the system can be effectively improved, the heating performance coefficient of the system can reach more than 2.0 according to calculation, and the change along with the outdoor environment temperature is not large;
3. after the water is heated by the intermediate heat exchanger and the air/water heat exchanger for two times, the temperature of circulating water can reach more than 60 ℃, and the defects of building heating and domestic hot water preparation modes in cold and severe cold areas are effectively overcome;
4. air is used as a refrigerant, so that the ozone layer damage and the ozone effect are avoided, and the environment is protected;
5. the air after heat release in the heat regenerator enters the turbine part to do work, and the air compression part is driven by the shaft to operate, so that the power consumption of the system can be effectively reduced, and the performance of the system is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a system diagram of the present invention;
in the figure, 1, a first air compressor, 2, a turbine compression air part, 3, a second air compressor, 4, a heat regenerator, 5, an air/water heat exchanger, 6, an intermediate heat exchanger, 7, a circulating water pump, 8, a hot water tank, 9, a water pipeline, 10, an air tee joint, 11, an air inlet, 12, an air outlet and 13, an air pipeline are arranged.
FIG. 2 is a schematic view of a turbine compressor section;
in the figure, 201 is a compressor part, 202 is a turbine part, 203 is a shaft part.
Detailed Description
An open heat pump hot water preparation method of air circulation comprises a first air compressor 1, a turbine air compression part 2, a second air compressor 3, a heat regenerator 4, an air/water heat exchanger 5 and an intermediate heat exchanger 6, wherein cold air in the atmospheric environment enters the heat regenerator 4 through an air inlet 11, enters an air inlet end of the first air compressor 1 after being preheated, is discharged from an exhaust end after being compressed and heated by the first air compressor 1, enters the intermediate heat exchanger 6, and is used for heating circulating water flowing through the intermediate heat exchanger 6 for the first time; the air is divided into two paths after being discharged from the intermediate heat exchanger 6, wherein one path of the air enters the air compressing part 201 of the turbine air compressing part 2, and is compressed, heated and pressurized by the air compressing part 201 and then discharged from the exhaust end; the other path of air enters the air inlet end of a second air compressor 3, is compressed by the second air compressor 3, is heated and pressurized and then is discharged from the air outlet end, and the two paths of air are mixed in an air tee joint 10 and then enter an air/water heat exchanger 5; the high-temperature and high-pressure air releases heat in the air/water heat exchanger 5, circulating water flowing through the air/water heat exchanger 5 is heated for the second time, the air with the reduced temperature enters the heat regenerator 4, the heat is further released in the heat regenerator 4, cold air entering the heat regenerator 4 through the air inlet 11 is preheated, finally the air enters the turbine part 202 of the turbine air compressing part 2, the air is changed into low-temperature and low-pressure air after acting in the turbine part, and the air is discharged into the atmospheric environment through the air outlet 12 to complete an air cycle.
Circulating water flows through the intermediate heat exchanger 6 under the action of the circulating water pump 7, is heated in the intermediate heat exchanger 6 for the first time, then enters the air/water heat exchanger 5, is heated for the second time by high-temperature and high-pressure air in the air/water heat exchanger 5, and then returns to the hot water tank 8 through a water pipeline. The water supply port 801 of the hot water tank 8 is connected with domestic hot water supply or heating hot water supply of a user, and the water return port 802 is connected with tap water or heating hot water return. When the water temperature in the hot water tank 8 reaches a set value, the device stops operating.
The first air compressor 1 and the second air compressor 3 are both variable frequency compressors, and variable frequency operation can be realized. Wherein the change in load is accommodated by adjusting the operating frequency of the first air compressor 1, increasing the operating frequency as the load increases and conversely decreasing the operating frequency. The second air compressor 3 is connected with the turbine air compressing part 2 in parallel, and the air flow ratio of the turbine part and the air compressing part in the turbine air compressing part 2 is adjusted by adjusting the operating frequency of the second air compressor 3, so that the turbine air compressing part 2 always operates at higher efficiency under the variable working condition, and the operating cost is saved.
The heat regenerator 4 is introduced, the introduced outdoor cold air is preheated by the air after heat exchange, heat energy is reasonably utilized, and meanwhile, the introduced outdoor cold air is heated for the first time and then enters the first air compressor for pressurization and temperature rise, so that compared with the condition that the cold air directly enters the first air compressor, the electric energy is saved, the performance coefficient of the system can be effectively improved, and the variation trend of the system heating quantity along with the outdoor environment temperature is basically consistent with the variation trend of the building heat load along with the outdoor environment temperature;
the invention adopts the air compressor to replace a refrigeration compressor in the electric heat pump, uses air as a refrigerant, has no ozone layer damage and ozone effect, and is environment-friendly.
According to the invention, the intermediate heat exchanger 6 is introduced, the exhaust gas of the first air compressor 1 enters the intermediate heat exchanger 6, the circulating water flowing through the intermediate heat exchanger 6 is heated for the first time, and the exhaust gas enters the second air compressor 3 and the turbine air compression part 2 after being cooled, so that on one hand, the inlet temperatures of the two parts can be reduced, the running conditions of the two parts can be improved, on the other hand, the mass flow of the air sucked by the two parts can be increased, and the heating capacity of the system can be increased. Meanwhile, the temperature of the circulating water heated for the first time by the intermediate heat exchanger 6 and heated for the second time by the air/water heat exchanger 5 can reach more than 60 ℃, and the defects of building heating and domestic hot water preparation modes in cold and severe cold areas are effectively overcome.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (2)
1. The method for preparing the hot water of the open heat pump with the air circulation is characterized in that cold air in the atmospheric environment enters a heat regenerator (4) through an air inlet (11), enters an air inlet end of a first air compressor (1) after being preheated, is discharged from an exhaust end after being compressed and heated by the first air compressor (1), enters an intermediate heat exchanger (6), and heats circulating water flowing through the intermediate heat exchanger (6) for the first time; the air is divided into two paths after being discharged from the intermediate heat exchanger (6), wherein one path of air enters an air compressing component (201) of the turbine air compressing component (2), is compressed by the air compressing component (201), is heated and pressurized, and is discharged from an exhaust end; the other path of air enters the air inlet end of a second air compressor (3), is compressed by the second air compressor (3), is heated and pressurized and then is discharged from the air outlet end, and the two paths of air are mixed in an air tee joint (10) and then enter an air/water heat exchanger (5); the high-temperature and high-pressure air releases heat in the air/water heat exchanger (5), circulating water flowing through the air/water heat exchanger (5) is heated for the second time, the air with the reduced temperature enters the heat regenerator (4), the heat is further released in the heat regenerator (4), cold air entering the heat regenerator through the air inlet (11) is preheated, finally the air enters a turbine part (202) of a turbine air compression part, the air is changed into low-temperature and low-pressure air after acting in the turbine part (202), and the air is discharged into the atmospheric environment through the air outlet (12) to complete air circulation.
2. The method for preparing the hot water of the open heat pump with the air circulation according to the claim 1 is characterized in that the circulating water flows through the intermediate heat exchanger (6) under the action of the circulating water pump (7), is heated in the intermediate heat exchanger (6) for the first time, then enters the air/water heat exchanger (5), is heated for the second time in the air/water heat exchanger (5) through high-temperature and high-pressure air, and then returns to the hot water tank (8) through a water pipeline; a water supply port (801) of the hot water tank is connected with domestic hot water supply or heating hot water supply of a user, and a water return port (802) is connected with tap water or heating hot water return; when the water temperature in the hot water tank (8) reaches a set value, the circulating water pump (7) stops running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810919365.2A CN108954821B (en) | 2018-08-10 | 2018-08-10 | Air circulation open type heat pump hot water preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810919365.2A CN108954821B (en) | 2018-08-10 | 2018-08-10 | Air circulation open type heat pump hot water preparation method |
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| Publication Number | Publication Date |
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| CN108954821A CN108954821A (en) | 2018-12-07 |
| CN108954821B true CN108954821B (en) | 2020-10-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023275784A1 (en) * | 2021-06-29 | 2023-01-05 | Tarnoc Holding B.V. | Heating apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022062272A1 (en) * | 2020-09-27 | 2022-03-31 | 李华玉 | Regenerative thermodynamic cycle and novel regenerative mechanical compression-type heat pump |
| GB2608070B (en) * | 2022-09-15 | 2023-09-06 | Peter Adamson Deceased | Heating arrangement |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105324563A (en) * | 2013-04-15 | 2016-02-10 | 法雷奥电机控制***公司 | Method for improving the energy efficiency of a drive system |
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- 2018-08-10 CN CN201810919365.2A patent/CN108954821B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105324563A (en) * | 2013-04-15 | 2016-02-10 | 法雷奥电机控制***公司 | Method for improving the energy efficiency of a drive system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023275784A1 (en) * | 2021-06-29 | 2023-01-05 | Tarnoc Holding B.V. | Heating apparatus |
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| CN108954821A (en) | 2018-12-07 |
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Effective date of registration: 20231023 Address after: No. 5-6-1, Building 27-5, Shengsheng 3rd Road, Dalian Economic and Technological Development Zone, Liaoning Province, 116000 Patentee after: Dalian Rijia Low Carbon New Energy Technology Co.,Ltd. Address before: 116600 No. 18 West Liaohe Road, Dalian economic and Technological Development Zone, Liaoning Patentee before: DALIAN MINZU University |