CN102645055B - Adaptively-matched solar auxiliary air source heat pump device - Google Patents
Adaptively-matched solar auxiliary air source heat pump device Download PDFInfo
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- CN102645055B CN102645055B CN201210151248.9A CN201210151248A CN102645055B CN 102645055 B CN102645055 B CN 102645055B CN 201210151248 A CN201210151248 A CN 201210151248A CN 102645055 B CN102645055 B CN 102645055B
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Abstract
The invention provides an adaptively-matched solar auxiliary air source heat pump device. The device comprises a refrigerant circulation loop subsystem, a solar hot water circulation loop subsystem and a user hot water loop subsystem, wherein the refrigerant circulation subsystem is the core of the whole system and controls the energy conversion and heat transmission; the refrigerant circulation subsystem comprises a compressor (1), an indoor condenser (2), a capillary pipe (3) and a sleeve heat exchanger (4); a refrigerant outlet of the indoor condenser (2) is connected with an inlet of the capillary pipe (3); an outlet of the capillary pipe (3) is connected with an in-pipe refrigerant inlet (11) of the sleeve heat exchanger (4); and an in-pipe refrigerant outlet (13) of the sleeve heat exchanger (4) is connected with a gas inlet of the compressor (1). Through the invention, the heat in the solar air source heat pump system can be reasonably distributed, and the energy consumption of the building can be saved.
Description
Technical field
The present invention relates to the device that solar auxiliary air source heat pump improves heat pump winter operation performance, belong to building energy conservation and Refrigeration Engineering field.
Background technology
Air source heat pump is a kind of airborne thermal source that utilizes, and by inputting a small amount of high-grade thermal source, realizes low-grade heat source and to high-grade thermal source, carries out a kind of heat pump type air conditioning system device of heat supply.The advantages such as air source heat pump is simple in structure with it, and operating cost is lower, easy to install are widely used in modern architecture.In green building field, air-source heat pump air conditioning system plays an important role with the advantage that it was had.During heat supply in winter operation, cold-producing medium absorbs airborne heat at outdoor evaporimeter side panel, then provides heat or hot water preparing through the laggard inner condenser side of entering the room of compressor compression intensification, and in general air source heat pump is a kind of comparatively energy-conservation winter heating mode.Air source heat pump also has the shortcoming of self, for example its comprehensive coefficient of performance is lower, while moving in the winter time, its heat capacity and coefficient of heat supply reduce with the reduction of outside air environment temperature, and the variation of environment temperature directly affects economy and the stability of heat pump operation; Simultaneously, when ambient temperature is reduced to air dew point temperature when following, evaporator external just can frosting phenomenon, when outdoor temperature is during lower than-10 ℃, because frosting meeting causes the deterioration of heat transfer effect, " reverse cycle defrost " used in defrost process and " electric heated defrosting " can be controlled the frost of evaporimeter, but this take and consumes a large amount of electric energy as cost, correlative study shows, in environment temperature, it is 0 ℃, when relative humidity is 70%, because the defrosting effect electric energy that consume can reach 12% of compressor power consumption more.Therefore,, no matter to building energy conservation or the stability of raising heat pump operation, the optimal design of air source heat pump system performance is had to important practical significance.
Solar energy is a kind of inexhaustible clean energy resource, and during sunny weather, the solar radiation that solar heat-collection plate is collected on average can reach 500 W/m in the winter time
2above, even the heat absorbing at the every square meter of rainy weather solar heat-collection plate is also greater than 50W, therefore can be when effectively utilizing the collected low-grade solar energy of solar heat-collection plate to improve moving in the winter time of heat pump the problem of shortage of heat.
Solar heat pump is a kind of system in conjunction with heat pump united operation by solar energy, by solar heat-collection plate, improve the temperature of low-temperature heat source in environment, thereby effectively improve the COP(Energy Efficiency Ratio of system), and solar energy heat pump system can also, as auxiliary life hot water system, be the heating form of a kind of economical operation, environmental protection.According to the connected mode of solar energy and heat pump, solar energy heat pump system is divided into the forms such as train, parallel system and mixing connected system.These systems be direct-expansion type or indirectly low the or solar heat-collection plate of service efficiency that all exists in evening or rainy weather of expansion type absorbs the problem that shortage of heat causes the outer fin frosting of outdoor evaporator tube, simultaneously, in view of the unsettled feature of solar energy self, the heat that solar heat-collection plate is collected is difficult to match with the required heat of vaporizer side, and this causes the requirement of solar air source heat pumps system stable operation to be subject to continuous query.Solar heat-collection plate is when accepting solar radiation, and surfacing often passes through certain specially treated, and material surface is increased solar radiative absorption ratio, and slin emissivity reduces, simultaneously, the hot conduction and convection effect on solar heat-collection plate surface is also weakened, heat dissipation capacity under its night and rainy weather reduces, the shortcoming of this class solar air source heat pumps is when its system cisco unity malfunction under night and rainy weather environment, the most extreme situation is, low-temperature low-pressure refrigerant in outdoor evaporimeter constantly absorbs the heat in the solar energy water circulatory system, and absorbable shortage of heat in solar heat-collection plate, cause internal working medium temperature constantly to reduce, evaporator with heat pump can not absorb any heat from the solar energy water circulatory system, system operation worsens, to compressor, also can cause serious harm.
Summary of the invention
technical problem:the solar auxiliary air source heat pump device that the object of this invention is to provide a kind of Adaptive matching.This system be take heat pump techniques and to flow with heat transfer technology be basic, not only can improve evaporimeter frosting outside air source heat pump winter operation efficiency and control room, and can mate difficult problem to evaporimeter heat absorption deficiency and heat under regular solar heat pump night and rainy weather and carry out certain solution, this system can also additional feed domestic hot-water simultaneously, is a kind of environmental protection, energy-conservation heating form.
technical scheme:the present invention is the solar auxiliary air source heat pump device of Adaptive matching.In the sunny cooperation solar energy water circulatory system on daytime, air source heat pump system and user's side hot-water heating system, by solar heat-collection plate by circulating water heating in the solar energy water circulatory system, by double-tube heat exchanger, transfer heat to the outdoor evaporimeter in air source heat pump system again, improve the evaporating temperature of cold-producing medium, the so effective frosting problem of vaporizer side outside control room, the steam pressure of compressor suction place cold-producing medium improves simultaneously, and then the COP of lifting heat pump winter operation, indoor condenser can be stored in unnecessary heat in user's side hot water storage tank, so that the in the situation that of night or rainy weather as indoor heating and domestic hot-water's auxiliary thermal source, reduce the heat burden of outdoor low-temperature heat source, and under night or rainy weather situation, outside air temperature is lower, close the solar energy water circulatory system, user's side hold over system is opened operation, can be used as auxiliary thermal source indoor a part of thermic load is provided, a part of heat can be born by heat pump in addition, the heat in the outer ethylene glycol solution of the refrigerant suction in evaporimeter in air source heat pump system now, heat in environment is by double-tube heat exchanger surface resistance of heat transfer, the thermal conduction resistance of shell, the thermal conduction resistance of ethylene glycol thermal conduction resistance and inner tube passes to cold-producing medium, ethylene glycol solution in the solar energy water circulatory system is because the inhomogeneous of temperature can form free convection, the heat exchange effect of reinforcement sleeves heat exchanger to a certain extent.Native system belongs to the parallel system of a kind of non-direct-expansion type.
For solving the problems of the technologies described above, the invention provides a kind of solar auxiliary air source heat pump device of Adaptive matching, this system comprises refrigerant circulation subsystem, solar water cycle subsystem and user's hot water subsystem;
Refrigerant circulation subsystem is the core of whole system, the conversion of control ability and the transmission of heat; Refrigerant circulation subsystem comprises: compressor, indoor condenser, capillary, double-tube heat exchanger; Wherein, indoor condenser refrigerant outlet is connected with import capillaceous, capillary outlet is connected with the tube refrigerant import of double-tube heat exchanger, and the tube refrigerant outlet of double-tube heat exchanger is connected with the air inlet of compressor, the import of compressor air-discharging outlet junction chamber inner condenser;
Solar energy water cycle subsystem is used for collecting the solar energy in environment, and solar energy is passed to the outdoor evaporimeter of heat pump, improves the evaporating temperature of cold-producing medium; Solar energy water cycle subsystem comprises: solar heat-collection plate, water circulating pump, double-tube heat exchanger, gate valve; Wherein, the shell side working medium import of the delivery port female connector heat exchange of heat pipe of solar heat-collection plate, the shell side sender property outlet of double-tube heat exchanger connects the import of gate valve, and the outlet of gate valve connects the import of water circulating pump, and recirculated water delivery side of pump connects the water inlet of solar heat-collection plate;
User's hot water subsystem is used for store heat pumping system heat more than needed, for user provides domestic hot-water and realize outdoor solar energy the problem of adaptive regulation while not meeting the demands; User's hot water subsystem comprises indoor condenser, valve, water pump, hot water storage tank, wherein, the shell-side delivery port of indoor condenser connects the import of valve, the import of the outlet water pump of valve, water delivery side of pump is connected with the import of hot water storage tank, and the outlet of hot water storage tank connects the shell-side water inlet of indoor condenser.
beneficial effect:the invention provides a kind of Adaptive matching device of solar auxiliary air source heat pump, utilize solar heat-collection plate to collect the heat of low-temperature heat source in environment, for improving the evaporating temperature of vaporizer side, improve the heat pump operational efficiency in winter.
In heat pump, cold-producing medium is walked in the pipe of double pipe heat exchanger, manage circulating of ethylene glycol solution in the outer solar energy water circulatory system heat in environment is constantly passed to cold-producing medium, the freezing point temperature of ethylene glycol is far below air dew point temperature, effectively the frosting problem of vaporizer side outside control room.
System is when move sunny daytime in the winter time, user's side hot water storage tank can store unnecessary heat, as the auxiliary thermal source under domestic hot-water and night or rainy weather environment, with respect to traditional solar heat pump, can better solve heat that solar heat-collection plate collects with the required unmatched shortcoming of heat of heat pump operation vaporizer side.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the solar auxiliary air source heat pump system of Adaptive matching;
Fig. 2 is double-tube heat exchanger combination.
Compressor 1, indoor condenser 2, capillary 3, double-tube heat exchanger 4, solar heat-collection plate 5, water circulating pump 6, gate valve 7, gate valve 8, water pump 9, user's side hot water storage tank 10, refrigerant inlet 11, solar energy water circulatory system shell side sender property outlet 12, refrigerant outlet 13, solar energy water circulatory system shell side working medium import 14.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
The solar auxiliary air source heat pump device of Adaptive matching provided by the invention, this device comprises refrigerant circulation subsystem, solar water cycle subsystem and user's hot water subsystem;
Refrigerant circulation subsystem is the core of whole system, the conversion of control ability and the transmission of heat; Refrigerant circulation subsystem comprises: compressor 1, indoor condenser 2, capillary 3, double-tube heat exchanger 4; Wherein, indoor condenser 2 refrigerant outlets are connected with the import of capillary 3, capillary 3 outlets are connected with the tube refrigerant import 11 of double-tube heat exchanger 4, the tube refrigerant outlet 13 of double-tube heat exchanger 4 is connected with the air inlet of compressor 1, the import of compressor 1 air exit junction chamber inner condenser 2;
Solar energy water cycle subsystem is used for collecting the solar energy in environment, and solar energy is passed to the outdoor evaporimeter of heat pump, improves the evaporating temperature of cold-producing medium; Solar energy water cycle subsystem comprises: solar heat-collection plate 5, water circulating pump 6, double-tube heat exchanger 4, gate valve 7; Wherein, the shell side working medium import 14 of the delivery port female connector heat exchange of heat pipe 4 of solar heat-collection plate 5, the shell side sender property outlet 12 of double-tube heat exchanger 4 connects the import of gate valve 7, and the outlet of gate valve 7 connects the import of water circulating pump 6, and the outlet of water circulating pump 6 connects the water inlet of solar heat-collection plate 5;
User's hot water subsystem is used for store heat pumping system heat more than needed, for user provides domestic hot-water and realize outdoor solar energy the problem of adaptive regulation while not meeting the demands; User's hot water subsystem comprises indoor condenser 2, valve 8, water pump 9, hot water storage tank 10, wherein, the shell-side delivery port of indoor condenser 2 connects the import of valve 8, the import of the outlet water pump 9 of valve 8, the outlet of water pump 9 is connected with the import of hot water storage tank 10, and the outlet of hot water storage tank 10 connects the shell-side water inlet of indoor condenser 2.
Fig. 1 is the Adaptive matching systematic schematic diagram of solar auxiliary air source heat pump, as shown in Figure 1, solar auxiliary air source heat pump system and device comprises: compressor 1, indoor condenser 2, capillary 3, double-tube heat exchanger 4, solar heat-collection plate 5, water circulating pump 6, gate valve 7, user's side hot water storage tank 10, water pump 9, gate valve 8.Wherein refrigerant circulation loop is composed in series by compressor 1, indoor condenser 2, capillary 3, double-tube heat exchanger 4 successively; Solar heat water circulation system is connected to form successively by double-tube heat exchanger 4, gate valve 7, water circulating pump 6, solar heat-collection plate 5; User's side hot-water return subsystem is composed in series successively by user's side hot water storage tank 10, water pump 9, gate valve 8.
Fig. 2 is the connection layout of the Adaptive matching system middle sleeve formula heat exchanger of solar auxiliary air source heat pump, as shown in Figure 2, comprising: refrigerant inlet 11, refrigerant outlet 13, solar energy water circulatory system working medium import 14, sender property outlet 12.
Cold-producing medium conventional in refrigerant circulation loop can be selected R22(monochlorodifluoromethane), R23(fluoroform), R134a(1,1,1,2-HFC-134a) etc., in solar heat water circulation system loop, conventional working medium can be selected ethylene glycol, ethanol etc.
In refrigerant circulation loop: carry out heat exchange from compressor 1 high-temperature high-pressure refrigerant out through indoor condenser 2, can select directly to add hot-air or carry out heat exchange with the water in hot water storage tank, cold-producing medium becomes liquid state from gaseous state under isobaric condition, in cold-producing medium saturated or in supercooled state, enter capillary 3 and after adiabatic throttling, become liquid-vapor mixture, inside the pipe of the double pipe heat exchanger 4 of cold-producing medium inflow afterwards, after the heat of the outer working medium of absorption tube, evaporate, by compressor, sucked again the refrigerant gas of low-temp low-pressure, complete circulation;
In solar heat water-flow circuit: sunny daytime in winter, ethylene glycol working medium transfers heat to after cold-producing medium in double pipe heat exchanger 4 pipe outsides, after gate valve 7 and water circulating pump 6 raising pressure, enter solar heat-collection plate 5, after solar energy in solar heat-collection plate in absorbing environmental, enter double pipe heat exchanger continuation and cold-producing medium working medium and carry out heat exchange, complete circulation; Rainy weather or night: close the solar energy water circulatory system, the now vaporizer side heat conduction of heat pump belongs to Adaptive matching form, air source heat pump system work;
In user's side hot water circulation loop: on sunny daytime, system is opened operation, and the water in hot water storage tank 10, through user's side condenser, is taken away heat storage unnecessary in system, after valve 8 and water pump 9, heat is stored in hot water storage tank, can be used as domestic hot-water's auxiliary thermal source; When rainy weather or night, system passes to indoor condenser again by the heat in water tank, reduces the thermic load of outdoor evaporimeter, the hot matching problem of optimization system.
The foregoing is only preferred embodiments of the present invention; protection scope of the present invention is not limited with above-mentioned embodiment; in every case the equivalence that those of ordinary skills do according to disclosed content is modified or is changed, and all should include in the protection domain of recording in claims.
Claims (1)
1. a solar auxiliary air source heat pump device for Adaptive matching, is characterized in that: this device comprises refrigerant circulation subsystem, solar water cycle subsystem and user's hot water subsystem;
Refrigerant circulation subsystem is the core of whole system, the conversion of control ability and the transmission of heat; Refrigerant circulation subsystem comprises: compressor (1), indoor condenser (2), capillary (3), double-tube heat exchanger (4); Wherein, indoor condenser (2) refrigerant outlet is connected with the import of capillary (3), capillary (3) outlet is connected with the tube refrigerant import (11) of double-tube heat exchanger (4), the tube refrigerant outlet (13) of double-tube heat exchanger (4) is connected with the air inlet of compressor (1), the import of compressor (1) air exit junction chamber inner condenser (2);
Solar water cycle subsystem is used for collecting the solar energy in environment, and solar energy is passed to the outdoor evaporimeter of heat pump, improves the evaporating temperature of cold-producing medium; Solar energy water cycle subsystem comprises: solar heat-collection plate (5), water circulating pump (6), double-tube heat exchanger (4), gate valve (7); Wherein, the shell side working medium import (14) of the delivery port female connector heat exchange of heat pipe (4) of solar heat-collection plate (5), the shell side sender property outlet (12) of double-tube heat exchanger (4) connects the import of gate valve (7), the outlet of gate valve (7) connects the import of water circulating pump (6), and the outlet of water circulating pump (6) connects the water inlet of solar heat-collection plate (5);
User's hot water subsystem is used for store heat pumping system heat more than needed, for user provides domestic hot-water and realize outdoor solar energy the problem of adaptive regulation while not meeting the demands; User's hot water subsystem comprises indoor condenser (2), valve (8), water pump (9), hot water storage tank (10), wherein, the shell-side delivery port of indoor condenser (2) connects the import of valve (8), the import of the outlet water pump (9) of valve (8), the outlet of water pump (9) is connected with the import of hot water storage tank (10), and the outlet of hot water storage tank (10) connects the shell-side water inlet of indoor condenser (2).
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| CN111998430B (en) * | 2020-09-10 | 2024-04-23 | 清华大学 | Self-defrosting air source heat pump unit and operation method thereof |
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| CN113266870A (en) * | 2021-04-07 | 2021-08-17 | 安徽建筑大学 | Household air conditioning system based on solar heat pump technology |
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