CN105444466A - Regenerative circle high temperature heat pump heater and heating method - Google Patents
Regenerative circle high temperature heat pump heater and heating method Download PDFInfo
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- CN105444466A CN105444466A CN201510956801.XA CN201510956801A CN105444466A CN 105444466 A CN105444466 A CN 105444466A CN 201510956801 A CN201510956801 A CN 201510956801A CN 105444466 A CN105444466 A CN 105444466A
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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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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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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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a regenerative circle high temperature heat pump heater and a heating method. The regenerative circle high temperature heat pump heater comprises a refrigerant circulation loop composed of a compressor unit, a hot water heat exchanger, a regenerative heat exchanger, a throttling element, an evaporator, a first stop valve and a second stop valve, and a hot water heating loop composed of the regenerative heat exchanger and the hot water heat exchanger. According to the regenerative circle high temperature heat pump heater and the heating method, the mixed working medium large temperature span regenerative cycle is adopted, the condensation heat of a compressor is fully used, cold water is heated to a certain temperature before entering a water tank, and the heat is recycled, so that the heating load in the water tank is reduced, the exhaust gas temperature of the compressor unit is increased, and the heater can be used for producing high temperature hot water and even boiling water; and besides, the mixed working medium large temperature span characteristic is used, the heat exchange temperature difference of the water tank and the heat exchangers are maintained within a relatively small range, compared with a heater adopting a pure working medium, the heater has the advantage that the irreversible loss is greatly reduced, and the system efficiency is improved.
Description
Technical field
The present invention relates to a kind of water heater, take especially mixture as working medium, the large temperature of boiling water or high-temperature-hot-water can be provided across extraction cycle Teat pump boiler, belong to heating device technology area.
Background technology
The high-temperature-hot-water of more than 90 DEG C has demand widely in public arenas such as enterprises and institutions, hotel, station, airport, factory, hospital, army, schools.Electrical heating is the Main Means that above-mentioned occasion obtains high-temperature-hot-water, and its principle directly utilizes high-grade electric energy conversion for heat energy feedwater heating, and leak heat loss owing to existing, its actual efficiency is less than 1.Directly utilize electrical heating to obtain high-temperature-hot-water and can consume a large amount of electric energy.For generally adopt 9 kilowatts of water heaters, calculated according to one day 4 hours electric water boiler heat time, the annual power consumption of separate unit reaches 13000 degree.According to the statistics display that research of industrial economy institute provides, within 2013, China's electric heater sales volume reaches 6,000,000,000 yuan, and be 9 kilowatts of water heaters by average price 1500 conversion, then sales volume reaches 4,000,000, newly-increased power consumption in 1 year 52000000000 degree, more than the generated energy of half the three gorges hydropower plant.If often spend electricity discharge carbon dioxide (CO2) about 0.9 kilogram of calculating according to China's conventional thermal power plant, the discharge of newly-increased 4,680 ten thousand tons of CO2 greenhouse gases can be caused.
Heat pump is that one heats mode efficiently, and its heating efficiency (COP) is generally greater than 1.According to former hotter water demand, adopt high temperature heat pump replace electric water boiler, even if high temperature heat pump heat COP by 2.0 Conservative estimations, electric energy 26,000,000,000 degree can be saved every year, be equivalent to reduce CO2 discharge 2,340 ten thousand tons.Therefore, exploitation high-temperature heat-pump water-heater, improves high-temperature-hot-water production efficiency, realizes energy-saving and emission-reduction strategy significant to China.
On Vehicles Collected from Market, the machine operating mode restriction by compression of regular air source heat pump water heater leaving water temperature, is only 55 DEG C, how uses as kitchen guarding domestic hot-water.The current technology relative maturity of this type of air source hot pump water heater, market has had the product of scale sale.Producing the high-temperature-hot-water of more than 90 DEG C from environment temperature, is that regular air source heat pump water heater is difficult to realize.The heat pump taking transcritical CO_2 to circulate is the air source heat pump product uniquely realizing 90 DEG C of leaving water temperatures in the market, but also mainly concentrates on Systems in Certain Developed Countries, such as Japan, this series products still rare on domestic market.Although CO2 is a kind of natural refrigerant, but its atmospheric boiling point is low, supercriticality will be under boiling water operating mode, for reaching higher heating efficiency, it runs high pressure will reach more than 10MPa, need the CO2 compressor that specialized designs manufactures, and the miscellaneous part of heat pump also will carry out strong design, technical costs drops into huge, and high pressure also brings very important safety problem simultaneously.
Summary of the invention
The object of the invention is:
A kind of object circulation heat recovery high-temperature heat-pump water-heater that source pump effective implemention high temperature is heated is provided.
For achieving the above object, technical scheme of the present invention is:
A kind of circulation heat recovery high-temperature heat-pump water-heater, comprises refrigerant circulation loop and hot water heating loop;
Described refrigerant circulation loop comprises the loop be made up of compressor unit, hot water heat exchanger, Recuperative heat exchanger, restricting element, evaporimeter, the first stop valve and the second stop valve, wherein:
The high-pressure outlet of described compressor unit connects the refrigerant side entrance of described hot water heat exchanger through described second stop valve, the refrigerant side outlet of described hot water heat exchanger connects the high-pressure refrigerant side entrance of described Recuperative heat exchanger, the high-pressure refrigerant side outlet of described Recuperative heat exchanger connects the entrance of described restricting element, the outlet of described restricting element connects the entrance of described evaporimeter, the outlet of described evaporimeter connects the low pressure refrigerant side entrance of described Recuperative heat exchanger, the low pressure refrigerant side outlet of described Recuperative heat exchanger connects the low pressure return line of described compressor unit to form loop,
The high-pressure outlet of described compressor unit also connects the entrance of described restricting element through described first stop valve, the outlet of described restricting element connects the entrance of described evaporimeter, the outlet of described evaporimeter connects the low pressure refrigerant side entrance of described Recuperative heat exchanger, and the low pressure refrigerant side outlet of described Recuperative heat exchanger connects the low pressure return line of described compressor unit to form loop;
Described hot water heating loop comprises the loop be made up of described Recuperative heat exchanger and hot water heat exchanger, and then cold water enter after the abundant heat exchange of described hot water heat exchanger through described Recuperative heat exchanger preheating and flow out.
Below technique scheme is explained further:
The opening and closing of described first stop valve and the second stop valve is by automatic control realization.
On the other hand, present invention also offers a kind of heating means of circulation heat recovery high-temperature heat-pump water-heater, comprising:
When Heat preservation state, start described compressor unit, close described second stop valve, open described first stop valve, cold-producing medium carries out throttling by described restricting element, and evaporates in described evaporimeter, described compressor unit is back to, fast lifting delivery temperature after heat absorption; After temperature reaches water temperature, open described second stop valve, close described first stop valve, the high temperature refrigerant of discharging from described compressor unit high-pressure outlet enters described hot water heat exchanger feedwater heating or insulation, then described restricting element is entered after entering described Recuperative heat exchanger heat exchange, absorb heat in described evaporator evaporation after throttling, again enter the condensation heat that described Recuperative heat exchanger forms backheat absorption portion working medium, described high temperature refrigerant temperature raises further, and gets back to described compressor unit and complete a working cycles;
When injecting cold water, start described compressor unit, open described second stop valve, close described first stop valve, the high temperature refrigerant of discharging from described compressor unit high-pressure outlet enters described hot water heat exchanger feedwater heating or insulation, then enter described Recuperative heat exchanger preheating and newly inject cold water, described restricting element is entered after heat exchange, absorb heat in described evaporator evaporation after throttling, again enter the condensation heat that described Recuperative heat exchanger forms backheat absorption portion working medium, described high temperature refrigerant temperature raises further, and get back to described compressor unit and complete a working cycles.
Described cold-producing medium comprises carbon tetrafluoride, ethane, ethene, propane, propylene, iso-butane, isopentane, n-hexane, difluoromethane, fluoroform, CF3I, 1, 1-Difluoroethane, 1, 1, 1, 2-HFC-134a, 1, 1, 2, 2-HFC-134a, 1, 1, 1, 2, 3, 3, 3-heptafluoro-propane, 1, 1, 1, 3, 3, 3-HFC-236fa, 1, 1, 1, 2, 3, 3-HFC-236fa, 1, 1, 1, 3, 3-pentafluoropropane and 1, 1, 2, 2, 3-pentafluoropropane, cis 1, 3, 3, 3-tetrafluoeopropene, trans 1, 3, 3, 3-tetrafluoeopropene, 2, 3, 3, two or more in 3-tetrafluoeopropene.
Adopt technique scheme, the invention has the advantages that:
Circulation heat recovery high-temperature heat-pump water-heater provided by the invention, comprise by compressor unit, hot water heat exchanger, Recuperative heat exchanger, restricting element, evaporimeter, the refrigerant circulation loop that first stop valve and the second stop valve form and the hot water heating loop be made up of described Recuperative heat exchanger and hot water heat exchanger, adopt the large temperature of mixed working fluid across extraction cycle, make full use of compressor condensation heat, just uniform temperature is heated to before cold water enters water tank, reclaim heat, decrease the heating load in water tank, improve the delivery temperature of compressor unit, can be used for producing high-temperature-hot-water even boiling water, in addition, utilize the large temperature of mixed working fluid across characteristic, the heat transfer temperature difference in water tank and heat exchanger remains in less scope, compares pure refrigerant and significantly decreases irreversible loss, improve system effectiveness.
Accompanying drawing explanation
The circulation heat recovery high-temperature heat-pump water-heater structural representation that Fig. 1 provides for a preferred embodiment of the present invention.
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Better embodiment of the present invention is given in accompanying drawing.These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe concrete embodiment, is not intended to be restriction the present invention.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
embodiment A
Refer to Fig. 1, be the circulation heat recovery high-temperature heat-pump water-heater structural representation that a preferred embodiment of the present invention provides, comprise: refrigerant circulation loop and hot water heating loop.
Described refrigerant circulation loop comprises the loop be made up of compressor unit (CU) 110, hot water heat exchanger (HX1) 120, Recuperative heat exchanger (HX2) 130, restricting element (V3) 140, evaporimeter (HX3) 150, first stop valve (V1) 160, second stop valve (V2) 170.
The high-pressure outlet of described compressor unit (CU) 110 connects the refrigerant side entrance of described hot water heat exchanger (HX1) 120 through described second stop valve (V2) 170, the refrigerant side outlet of described hot water heat exchanger (HX1) 120 connects the high-pressure refrigerant side entrance of described Recuperative heat exchanger (HX2) 130, the high-pressure refrigerant side outlet of described Recuperative heat exchanger (HX2) 130 connects the entrance of described restricting element (V3) 140, the outlet of described restricting element (V3) 140 connects the entrance of described evaporimeter (HX3) 150, the outlet of described evaporimeter (HX3) 150 connects the low pressure refrigerant side entrance of described Recuperative heat exchanger (HX2) 130, the low pressure refrigerant side outlet 134 of described Recuperative heat exchanger (HX2) 130 connects the low pressure return line of described compressor unit (CU) 110 to form loop,
The high-pressure outlet of described compressor unit (CU) 110 also connects the entrance of described restricting element (V3) 140 through described first stop valve (V1) 160, the outlet of described restricting element (V3) 140 connects the entrance of described evaporimeter (HX3) 150, the outlet of described evaporimeter (HX3) 150 connects the low pressure refrigerant side entrance of described Recuperative heat exchanger (HX2) 130, and the low pressure refrigerant side outlet of described Recuperative heat exchanger (HX2) 130 connects the low pressure return line of described compressor unit (CU) 110 to form loop;
Described hot water heating loop comprises the loop be made up of described Recuperative heat exchanger (HX2) 130 and hot water heat exchanger (HX1) 120, and then cold water enter after the abundant heat exchange of described hot water heat exchanger (HX1) 120 through described Recuperative heat exchanger (HX2) 130 preheating and flow out.
Preferably, the opening and closing of described first stop valve (V1) 160 and the second stop valve (V2) 170 is by automatic control realization.
Described cold-producing medium comprises ethane, propane, cis 1,3,3,3-tetrafluoeopropene and isopentane.
Be appreciated that, by selecting the cold-producing medium constituent element of suitable boiling point, and optimize constituent element concentration proportioning, in conjunction with the large temperature during phase transformation of non-azeotropic mixed working medium level pressure across temperature glide characteristic, obtain better thermal capacitance coupling, the object that source pump effective implemention high temperature heats can be made, when environment temperature is 25 DEG C, the hot COP of pump 15 DEG C of water being heated to saturated hot-water (about 100 DEG C) can reach more than 3, and now compressor unit (CU) 110 operating mode is suitable with conventional air-conditioning operating mode, common totally-enclosed oil lubrication single-stage compressor of air conditioner therefore can be taked to realize.
embodiment B
The heating means of the circulation heat recovery high-temperature heat-pump water-heater that another preferred embodiment of the present invention provides, comprise: injecting without cold water, when carrying out merely Heat preservation state: start described compressor unit (CU) 110, close the second stop valve (V2) 170, open the first stop valve (V1) 160, cold-producing medium carries out throttling by restricting element (V3) 140, and evaporate in evaporimeter (HX3) 150, described compressor unit (CU) 110 is back to after heat absorption, fast lifting delivery temperature, thus make full use of compressor condensation heat, just uniform temperature is heated to before cold water enters water tank, reclaim heat, decrease the heating load in water tank, improve the delivery temperature of compressor unit, can be used for producing high-temperature-hot-water even boiling water, after temperature reaches water temperature, open the second stop valve (V2) 170, close the first stop valve (V1) 160, the high temperature refrigerant of discharging from described compressor unit (CU) 110 high-pressure outlet enters hot water heat exchanger (HX1) 120 feedwater heating or insulation, then restricting element (V3) 140 is entered after entering Recuperative heat exchanger (HX2) 130 heat exchange, at evaporimeter (HX3) 150 evaporation endothermic after throttling, again enter the condensation heat that Recuperative heat exchanger (HX2) 130 forms backheat absorption portion working medium, described high temperature refrigerant temperature raises further, and get back to compressor unit (CU) 110 and complete a working cycles,
When injecting cold water, start described compressor unit, open described second stop valve, close described first stop valve, the high temperature refrigerant of discharging from described compressor unit high-pressure outlet enters described hot water heat exchanger feedwater heating or insulation, then enter described Recuperative heat exchanger preheating and newly inject cold water, described restricting element is entered after heat exchange, absorb heat in described evaporator evaporation after throttling, again enter the condensation heat that described Recuperative heat exchanger forms backheat absorption portion working medium, described high temperature refrigerant temperature raises further, and get back to described compressor unit and complete a working cycles, the heating means of the Teat pump boiler that such scheme provides, switch in the duty of Heat preservation state and injection cold water, thus effectively utilize the large temperature of mixed working fluid across characteristic, heat transfer temperature difference in water tank and heat exchanger remains in less scope, compare pure refrigerant and significantly decrease irreversible loss, improve system effectiveness.
Preferably, described cold-producing medium comprises ethene, 1,1-Difluoroethane, 1,1,1,3,3-pentafluoropropane and n-hexane.
Be appreciated that, by selecting the cold-producing medium constituent element of suitable boiling point, and optimize constituent element concentration proportioning, in conjunction with the large temperature during phase transformation of non-azeotropic mixed working medium level pressure across temperature glide characteristic, obtain better thermal capacitance coupling, the object that source pump effective implemention high temperature heats can be made, when environment temperature is 25 DEG C, the hot COP of pump 15 DEG C of water being heated to saturated hot-water (about 100 DEG C) can reach more than 3, and now compressor unit (CU) 110 operating mode is suitable with conventional air-conditioning operating mode, common totally-enclosed oil lubrication single-stage compressor of air conditioner therefore can be taked to realize.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (4)
1. a circulation heat recovery high-temperature heat-pump water-heater, is characterized in that, comprises refrigerant circulation loop and hot water heating loop;
Described refrigerant circulation loop comprises the loop be made up of compressor unit, hot water heat exchanger, Recuperative heat exchanger, restricting element, evaporimeter, the first stop valve and the second stop valve, wherein:
The high-pressure outlet of described compressor unit connects the refrigerant side entrance of described hot water heat exchanger through described second stop valve, the refrigerant side outlet of described hot water heat exchanger connects the high-pressure refrigerant side entrance of described Recuperative heat exchanger, the high-pressure refrigerant side outlet of described Recuperative heat exchanger connects the entrance of described restricting element, the outlet of described restricting element connects the entrance of described evaporimeter, the outlet of described evaporimeter connects the low pressure refrigerant side entrance of described Recuperative heat exchanger, the low pressure refrigerant side outlet of described Recuperative heat exchanger connects the low pressure return line of described compressor unit to form loop,
The high-pressure outlet of described compressor unit also connects the entrance of described restricting element through described first stop valve, the outlet of described restricting element connects the entrance of described evaporimeter, the outlet of described evaporimeter connects the low pressure refrigerant side entrance of described Recuperative heat exchanger, and the low pressure refrigerant side outlet of described Recuperative heat exchanger connects the low pressure return line of described compressor unit to form loop;
Described hot water heating loop comprises the loop be made up of described Recuperative heat exchanger and hot water heat exchanger, and then cold water enter after the abundant heat exchange of described hot water heat exchanger through described Recuperative heat exchanger preheating and flow out.
2. circulation heat recovery high-temperature heat-pump water-heater according to claim 1, is characterized in that, the opening and closing of described first stop valve and the second stop valve is by automatic control realization.
3. heating means for circulation heat recovery high-temperature heat-pump water-heater according to claim 1, is characterized in that, comprising:
When Heat preservation state, start described compressor unit, close described second stop valve, open described first stop valve, cold-producing medium carries out throttling by described restricting element, and evaporates in described evaporimeter, described compressor unit is back to, fast lifting delivery temperature after heat absorption; After temperature reaches water temperature, open described second stop valve, close described first stop valve, the high temperature refrigerant of discharging from described compressor unit high-pressure outlet enters described hot water heat exchanger feedwater heating or insulation, then described restricting element is entered after entering described Recuperative heat exchanger heat exchange, absorb heat in described evaporator evaporation after throttling, again enter the condensation heat that described Recuperative heat exchanger forms backheat absorption portion working medium, described high temperature refrigerant temperature raises further, and gets back to described compressor unit and complete a working cycles;
When injecting cold water, start described compressor unit, open described second stop valve, close described first stop valve, the high temperature refrigerant of discharging from described compressor unit high-pressure outlet enters described hot water heat exchanger feedwater heating or insulation, then enter described Recuperative heat exchanger preheating and newly inject cold water, described restricting element is entered after heat exchange, absorb heat in described evaporator evaporation after throttling, again enter the condensation heat that described Recuperative heat exchanger forms backheat absorption portion working medium, described high temperature refrigerant temperature raises further, and get back to described compressor unit and complete a working cycles.
4. the heating means of circulation heat recovery high-temperature heat-pump water-heater according to claim 1, it is characterized in that, described cold-producing medium comprises carbon tetrafluoride, ethane, ethene, propane, propylene, iso-butane, isopentane, n-hexane, difluoromethane, fluoroform, CF3I, 1, 1-Difluoroethane, 1, 1, 1, 2-HFC-134a, 1, 1, 2, 2-HFC-134a, 1, 1, 1, 2, 3, 3, 3-heptafluoro-propane, 1, 1, 1, 3, 3, 3-HFC-236fa, 1, 1, 1, 2, 3, 3-HFC-236fa, 1, 1, 1, 3, 3-pentafluoropropane and 1, 1, 2, 2, 3-pentafluoropropane, cis 1, 3, 3, 3-tetrafluoeopropene, trans 1, 3, 3, 3-tetrafluoeopropene, 2, 3, 3, two or more in 3-tetrafluoeopropene.
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Cited By (6)
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| CN107676999A (en) * | 2017-09-07 | 2018-02-09 | 中国科学院理化技术研究所 | Big temperature is across heat pump |
| CN107830634A (en) * | 2017-09-19 | 2018-03-23 | 中国科学院理化技术研究所 | A kind of mixed working fluid back-heating type heat pump boiler and control method |
| CN107928864A (en) * | 2017-11-25 | 2018-04-20 | 中国科学院理化技术研究所 | A kind of low temperature cold therapy system |
| CN109827419A (en) * | 2019-02-20 | 2019-05-31 | 中国科学院理化技术研究所 | A kind of big temperature of air-source is across high-temperature heat pump drying system |
| CN110746936A (en) * | 2019-10-11 | 2020-02-04 | 金华永和氟化工有限公司 | Environment-friendly mixed refrigerant |
| CN114738729A (en) * | 2022-04-18 | 2022-07-12 | 湖南麦思克科技有限公司 | Boiler feed water heating method and system |
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| CN107928864B (en) * | 2017-11-25 | 2020-07-24 | 中国科学院理化技术研究所 | Low-temperature cold therapy system |
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| CN110746936A (en) * | 2019-10-11 | 2020-02-04 | 金华永和氟化工有限公司 | Environment-friendly mixed refrigerant |
| CN114738729A (en) * | 2022-04-18 | 2022-07-12 | 湖南麦思克科技有限公司 | Boiler feed water heating method and system |
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| CN105444466B (en) | 2018-11-09 |
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