CN113007825A - Solar-assisted steam compression heat pump dehumidification air-conditioning system - Google Patents
Solar-assisted steam compression heat pump dehumidification air-conditioning system Download PDFInfo
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- CN113007825A CN113007825A CN202110291792.2A CN202110291792A CN113007825A CN 113007825 A CN113007825 A CN 113007825A CN 202110291792 A CN202110291792 A CN 202110291792A CN 113007825 A CN113007825 A CN 113007825A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
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Abstract
The invention discloses a solar auxiliary steam compression heat pump dehumidification air-conditioning system, which relates to the field of compression heat pumps and comprises a solar heat collector, a heat collection circulating pump, a hot water circulating pump, a generator, a solution heat exchanger, an absorber, a condenser, a compressor, a fluorine-path four-way valve, a solar reheater, an outdoor heat exchanger, a liquid reservoir, a subcooler, an indoor heat exchanger, a fluorine-path three-way valve, a dehumidification heat exchanger, a fan, an air channel and an air four-way valve; the fluorine road four-way valve can switch the refrigeration and heating modes according to different seasons, and the air conditioning system continuously outputs air meeting the requirements of indoor temperature and humidity by matching the air four-way valve and the fluorine road three-way valve. By implementing the invention, the evaporation temperature of the humidity load can be increased, the electric power consumption ratio of the air conditioning system for refrigerating in summer can be increased by using the solar energy, and the heating energy efficiency is better than that of an air source heat pump by using the air energy and the solar energy in a heating mode in winter.
Description
Technical Field
The invention relates to the field of compression heat pumps, in particular to a solar-assisted vapor compression heat pump dehumidification air-conditioning system.
Background
In the prior art, a steam compression type air conditioning system is widely applied in the market due to the advantages of small volume, convenient energy consumption, refrigeration and heating functions and the like; however, the energy consumption of the steam compression type air conditioning system is high, and the fluctuation of a power grid can be caused by the large consumption of electric energy after the large-scale application, so that urgent needs are provided for the energy-saving improvement of the steam compression type air conditioning system.
The steam compression type air conditioning system adopts a conventional coupling processing mode for heat and humidity loads, and the evaporation temperature is required to be lower than the dew point temperature to achieve the effect of condensation and dehumidification so as to effectively process the humidity loads, thereby limiting the performance improvement of the air conditioning system; for areas with abundant solar energy resources, the solar energy auxiliary compression type air conditioning system is also an economical energy-saving mode, absorption type refrigeration in the existing solar heat driving refrigeration technology is most efficient, the technology is mature and widely applied, and how to effectively combine the solar energy absorption type air conditioning system with the steam compression type air conditioning system and the volume of the combined system is as small as possible is also a problem which needs to be solved urgently at present.
Therefore, those skilled in the art are dedicated to develop a solar-assisted vapor compression heat pump dehumidification air-conditioning system, which not only can fully utilize solar radiant energy with various radiant flux densities and has the advantage of stable operation all seasons, but also has the advantages of low energy consumption and small system volume.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the present invention is how to provide a solar assisted vapor compression heat pump dehumidification air conditioner, which not only can fully utilize solar radiant energy with various radiant flux densities, but also has the advantages of stable operation all seasons, low energy consumption and small system volume.
In order to achieve the purpose, the invention provides a solar auxiliary steam compression heat pump dehumidification air-conditioning system, which comprises a solar heat collector, a heat collection circulating pump, a heat storage water tank, a hot water circulating pump, a first waterway three-way valve, a second waterway three-way valve, a generator, a solution heat exchanger, an absorber, a solution circulating pump, a condenser, a first throttle valve, a compressor, a fluorine path four-way valve, a solar reheater, an outdoor heat exchanger, a liquid reservoir, a subcooler, a second throttle valve, a third throttle valve, an indoor heat exchanger, a gas-liquid separator, a first fluorine path three-way valve, a second fluorine path three-way valve, a first dehumidification heat exchanger, a second dehumidification heat exchanger, a first induced draft fan, a second induced draft fan, a first air channel, a second air channel, a third air channel, a heat dissipation fan, a first air four-way;
the solar collector is configured to absorb solar radiant energy;
an outlet of the solar heat collector is connected with a first inlet of the heat storage water tank, a first outlet of the heat storage water tank is connected with an inlet of the heat collection circulating pump, and an outlet of the heat collection circulating pump is connected with an inlet of the solar heat collector;
a second outlet of the heat storage water tank is connected with an inlet of the hot water circulating pump, an outlet of the hot water circulating pump is connected with a second port of the first waterway three-way valve, a third port of the first waterway three-way valve is connected with a fourth port of the generator, a fifth port of the generator is connected with a third port of the second waterway three-way valve, and a second port of the second waterway three-way valve is connected with a second inlet of the heat storage water tank;
a first port of the first waterway three-way valve is connected with a first port of the solar reheater, and a second port of the solar reheater is connected with a first port of the second waterway three-way valve;
the third port of the generator is connected with the second port of the solution heat exchanger, the fourth port of the solution heat exchanger is connected with the first inlet of the absorber, the outlet of the absorber is connected with the inlet of the solution circulating pump, the outlet of the solution circulating pump is connected with the third port of the solution heat exchanger, and the first port of the solution heat exchanger is connected with the second port of the generator;
the first port of the generator is connected with the inlet of the condenser, the outlet of the condenser is connected with the inlet of the first throttling valve, the outlet of the first throttling valve is connected with the third port of the subcooler, and the fourth port of the subcooler is connected with the second inlet of the absorber;
the outlet of the compressor is connected with a first port of the fluorine-way four-way valve, a second port of the fluorine-way four-way valve is connected with a fourth port of the solar reheater, a third port of the solar reheater is connected with a first port of the outdoor heat exchanger, a second port of the outdoor heat exchanger is connected with a first port of the liquid accumulator, a second port of the liquid accumulator is connected with a first port of the subcooler, and a second port of the subcooler is respectively connected with a first port of the second throttle valve and a first port of the third throttle valve;
a second port of the second throttling valve is connected with a first port of the indoor heat exchanger, a second port of the indoor heat exchanger is connected with a fourth port of the fluorine-way four-way valve, a third port of the fluorine-way four-way valve is connected with an inlet of the gas-liquid separator, and an outlet of the gas-liquid separator is connected with an inlet of the compressor;
a second port of the third throttle valve is connected with a first port of the first fluorine path three-way valve, a second port of the first fluorine path three-way valve is connected with a second port of the first dehumidification heat exchanger, a first port of the first dehumidification heat exchanger is connected with a third port of the second fluorine path three-way valve, a third port of the first fluorine path three-way valve is connected with a first port of the second dehumidification heat exchanger, a second port of the second dehumidification heat exchanger is connected with a second port of the second fluorine path three-way valve, and a first port of the second fluorine path three-way valve is connected with a fourth port of the fluorine path four-way valve;
the first dehumidification heat exchanger and the first induced draft fan are arranged in the first air duct; the second dehumidification heat exchanger and the second induced draft fan are arranged in the second air duct; the absorber, the condenser, the outdoor heat exchanger and the heat dissipation fan are all arranged in the third air duct; the indoor heat exchanger is arranged in the fourth air duct;
a first port of the first air four-way valve is connected with an inlet of the first air channel, a second port of the first air four-way valve is connected with an outlet of the third air channel, a third port of the first air four-way valve is connected with an inlet of the second air channel, and a fourth port of the first air four-way valve is connected with ambient air;
the first port of the second air four-way valve is connected with the outlet of the first air channel, the second port of the second air four-way valve is connected with the ambient air, the third port of the second air four-way valve is connected with the outlet of the second air channel, and the fourth port of the second air four-way valve is connected with the inlet of the fourth air channel.
The ambient air in the invention refers to the outdoor air of the room with the solar-assisted vapor compression heat pump dehumidification air-conditioning function.
Further, the condenser is arranged in the downwind direction of the absorber, the outdoor heat exchanger is arranged in the downwind direction of the condenser, and the cooling fan is arranged in the downwind direction of the outdoor heat exchanger.
In the technical scheme, the downwind direction refers to the downstream of the wind direction of the wind flowing through the condenser, the absorber and the outdoor heat exchanger.
Further, the solar reheater and the subcooler are plate heat exchangers.
In one technical scheme of the invention, the solar reheater and the subcooler are used for assisting in heating and cooling by using solar energy.
In one embodiment of the present invention, the operating states of the first dehumidification heat exchanger and the second dehumidification heat exchanger are configured to include a regeneration state and a dehumidification state.
In the technical scheme of the invention, the compression type sub-cycle is a double-evaporator parallel structure, and the compression type sub-cycle is respectively an indoor heat exchanger, a first dehumidifying heat exchanger and a second dehumidifying heat exchanger which bear sensible heat load and latent heat load respectively.
In the technical scheme of the invention, the first air four-way valve and the second air four-way valve are configured, so that the air to be treated is subjected to wet load treatment and heat load treatment sequentially.
In the technical scheme of the invention, the first waterway three-way valve and the second waterway three-way valve are configured, so that solar energy can act on the absorption sub-cycle or directly act on the compression sub-cycle.
Further, the operation modes of the air conditioning system are configured to include a vapor compression dehumidification cooling mode, a solar absorption assisted vapor compression dehumidification cooling mode, a vapor compression humidification heating mode and a solar assisted vapor compression humidification heating mode.
Further, the air conditioning system is configured to be switchable between the different operating modes according to a mode switching criterion.
Further, the mode switching standard comprises seasonal conditions and the heat storage temperature of the heat storage water tank.
In the technical scheme of the invention, the seasonal working condition refers to the seasonal condition of the working area of the air conditioning system and the specific environmental condition in the corresponding season; the heat storage temperature of the heat storage water tank means the temperature of water in the heat storage water tank.
Further, the air conditioning system is configured to operate in the vapor compression dehumidification cooling mode, the hot water circulation pump and the solution circulation pump are set to be off, the first port and the second port of the fluorine four-way valve are configured to communicate, and the third port and the fourth port of the fluorine four-way valve are configured to communicate.
Further, the air conditioning system is configured to operate in the vapor compression humidification heating mode, the hot water circulation pump and the solution circulation pump are set to be off, the first port and the fourth port of the fluorine four-way valve are configured to communicate, and the second port and the third port of the fluorine four-way valve are configured to communicate.
Further, the air conditioning system is configured to operate in the solar absorption assisted vapor compression dehumidification cooling mode, the hot water circulation pump and the solution circulation pump are set to be on, the first port and the second port of the four-way valve are configured to communicate, the third port and the fourth port of the four-way valve are configured to communicate, the second port and the third port of the first three-way waterway valve are configured to communicate, and the second port and the third port of the second three-way waterway valve are configured to communicate.
Further, the air conditioning system is configured to operate in the solar assisted vapor compression humidification heating mode, the hot water circulation pump is configured to be on, the solution circulation pump is configured to be off, the first port and the fourth port of the four-way fluorine valve are configured to communicate, the second port and the third port of the four-way fluorine valve are configured to communicate, the first port and the second port of the first three-way water way valve are configured to communicate, and the first port and the second port of the second three-way water way valve are configured to communicate.
Further, the air conditioning system is configured to work in any one of the vapor compression dehumidification cooling mode, the solar absorption auxiliary vapor compression dehumidification cooling mode, the vapor compression humidification heating mode or the solar auxiliary vapor compression humidification heating mode, and the compressor, the heat dissipation fan and the heat collection circulating pump are all set to be on and working.
Compared with the prior art, the implementation of the invention has at least the following beneficial technical effects:
(1) according to the technical scheme disclosed by the invention, the moisture load and the heat load of the air to be treated are sequentially treated by matching the coupling dehumidification heat exchanger and the two air four-way valves, so that the stable outlet air temperature and humidity are obtained.
(2) According to the technical scheme disclosed by the invention, the distribution of the refrigerant flow can be controlled by arranging the double throttle valves in the steam compression subsystem, different heat-humidity load ratios are met, and the high environmental adaptability is realized.
(3) According to the technical scheme disclosed by the invention, the solar energy is utilized to assist the steam compression air conditioner to refrigerate and heat, and compared with a conventional steam compression air conditioning system, the air conditioning performance is greatly improved.
(4) According to the technical scheme disclosed by the invention, the heat dissipation loads of the absorber, the condenser and the outdoor heat exchanger are used as the regeneration heat of the dehumidification heat exchanger, so that the waste heat is effectively utilized, and the energy-saving efficiency of the air-conditioning system is further improved.
(5) The technical scheme disclosed by the invention can fully utilize solar radiant energy with various radiant flux densities, and has the advantages of high overall energy utilization efficiency of the system, small system volume and high integration level.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic block diagram of a vapor compression dehumidification refrigeration mode in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of the solar absorption assisted vapor compression dehumidification refrigeration mode in accordance with a preferred embodiment of the present invention;
FIG. 3 is a schematic structural view of a steam compression and humidification heating mode according to a preferred embodiment of the present invention;
FIG. 4 is a schematic structural view of a solar assisted vapor compression humidification heating mode in accordance with a preferred embodiment of the present invention;
wherein, 1-a solar heat collector, 2-a heat collection circulating pump, 3-a heat storage water tank, 4-a hot water circulating pump, 5-a first water path three-way valve, 6-a second water path three-way valve, 7-a generator, 8-a solution heat exchanger, 9-an absorber, 10-a solution circulating pump, 11-a condenser, 12-a first throttle valve, 13-a compressor, 14-a fluorine path four-way valve, 15-a solar reheater, 16-an outdoor heat exchanger, 17-a liquid storage device, 18-a subcooler, 19-a second throttle valve, 20-a third throttle valve, 21-an indoor heat exchanger, 22-a gas-liquid separator, 23-a first fluorine path three-way valve, 24-a second fluorine path three-way valve, 25-a first dehumidifying heat exchanger, 26-a second dehumidifying heat exchanger, 27-a first induced draft fan, 28-a second induced draft fan, 29-a first air duct, 30-a second air duct, 31-a third air duct, 32-a heat dissipation fan, 33-a first air four-way valve, 34-a second air four-way valve and 35-a fourth air duct.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
In the description of the embodiments of the present application, it should be clear that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the described devices or elements must have specific orientations or positional relationships, i.e., cannot be construed as limiting the embodiments of the present application; furthermore, the terms "first," "second," "third," "fourth," and the like are used merely to facilitate description or to simplify description, and do not indicate or imply importance.
As shown in fig. 1, the embodiment discloses a solar assisted vapor compression heat pump dehumidification air-conditioning system, which specifically includes a solar heat collector 1, a heat collection circulation pump 2, a heat storage water tank 3, a hot water circulation pump 4, a first waterway three-way valve 5, a second waterway three-way valve 6, a generator 7, a solution heat exchanger 8, an absorber 9, a solution circulation pump 10, a condenser 11, a first throttle valve 12, a compressor 13, a fluorine path four-way valve 14, a solar reheater 15, an outdoor heat exchanger 16, a liquid reservoir 17, a subcooler 18, a second throttle valve 19, a third throttle valve 20, an indoor heat exchanger 21, a gas-liquid separator 22, a first fluorine path three-way valve 23, a second fluorine path three-way valve 24, a first dehumidification heat exchanger 25, a second dehumidification heat exchanger 26, a first induced draft fan 27, a second induced draft fan 28, a first air duct 29, a second air duct 30, a third air, A first air four-way valve 33, a second air four-way valve 34, and a fourth air duct 35.
The outlet of the solar heat collector 1 is connected with the first inlet of the heat storage water tank 3, the first outlet of the heat storage water tank 3 is connected with the inlet of the heat collection circulating pump 2, and the outlet of the heat collection circulating pump 2 is connected with the inlet of the solar heat collector 1;
a second outlet of the heat storage water tank 3 is connected with an inlet of a hot water circulating pump 4, an outlet of the hot water circulating pump 4 is connected with a second port of a first waterway three-way valve 5, a third port of the first waterway three-way valve 5 is connected with a fourth port of a generator 7, a fifth port of the generator 7 is connected with a third port of a second waterway three-way valve 6, and a second port of the second waterway three-way valve 6 is connected with a second inlet of the heat storage water tank 3;
a first port of the first waterway three-way valve 5 is connected with a first port of a solar reheater 15, and a second port of the solar reheater 15 is connected with a first port of the second waterway three-way valve 6;
a third port of the generator 7 is connected with a second port of the solution heat exchanger 8, a fourth port of the solution heat exchanger 8 is connected with a first inlet of the absorber 9, an outlet of the absorber 9 is connected with an inlet of the solution circulating pump 10, an outlet of the solution circulating pump 10 is connected with a third port of the solution heat exchanger 8, and a first port of the solution heat exchanger 8 is connected with the second port of the generator 7;
a first port of the generator 7 is connected with an inlet of a condenser 11, an outlet of the condenser 11 is connected with an inlet of a first throttling valve 12, an outlet of the first throttling valve 12 is connected with a third port of a subcooler 18, and a fourth port of the subcooler 18 is connected with a second inlet of an absorber 9;
an outlet of the compressor 13 is connected with a first port of a fluorine-way four-way valve 14, a second port of the fluorine-way four-way valve 14 is connected with a fourth port of a solar reheater 15, a third port of the solar reheater 15 is connected with a first port of an outdoor heat exchanger 16, a second port of the outdoor heat exchanger 16 is connected with a first port of a liquid accumulator 17, a second port of the liquid accumulator 17 is connected with a first port of a subcooler 18, and a second port of the subcooler 18 is connected with a first port of a second throttling valve 19 and a first port of a third throttling valve 20;
a second port of the second throttle valve 19 is connected with a first port of the indoor heat exchanger 21, a second port of the indoor heat exchanger 21 is connected with a fourth port of the fluorine-way four-way valve 14, a third port of the fluorine-way four-way valve 14 is connected with an inlet of a gas-liquid separator 22, and an outlet of the gas-liquid separator 22 is connected with an inlet of the compressor 13;
a second port of the third throttle valve 20 is connected to a first port of a first fluorine path three-way valve 23, a second port of the first fluorine path three-way valve 23 is connected to a second port of a first dehumidification heat exchanger 25, a first port of the first dehumidification heat exchanger 25 is connected to a third port of a second fluorine path three-way valve 24, a third port of the first fluorine path three-way valve 23 is connected to a first port of a second dehumidification heat exchanger 26, a second port of the second dehumidification heat exchanger 26 is connected to a second port of the second fluorine path three-way valve 24, and a first port of the second fluorine path three-way valve 24 is connected to a fourth port of the fluorine path four-way valve 14;
the first dehumidification heat exchanger 25 and the first induced draft fan 27 are arranged in the first air duct 29, the second dehumidification heat exchanger 26 and the second induced draft fan 28 are arranged in the second air duct 30, the absorber 9, the condenser 11 and the outdoor heat exchanger 16 are arranged in the third air duct 31 in parallel, heat dissipation is carried out through the heat dissipation fan 32, and the indoor heat exchanger 21 is arranged in the fourth air duct 35;
a first port of the first air four-way valve 33 is connected with an inlet of the first air duct 29, a second port of the first air four-way valve 33 is connected with an outlet of the third air duct 31, a third port of the first air four-way valve 33 is connected with an inlet of the second air duct 30, and a fourth port of the first air four-way valve 33 is connected with ambient air;
a first port of the second air four-way valve 34 is connected to the outlet of the first air duct 29, a second port of the second air four-way valve 34 is connected to the ambient air, a third port of the second air four-way valve 34 is connected to the outlet of the second air duct 30, and a fourth port of the second air four-way valve 34 is connected to the inlet of the fourth air duct 35.
In the air conditioning system disclosed in this embodiment, the compression type sub-cycle is a double-evaporator parallel structure, and the indoor heat exchanger 21, the first dehumidifying heat exchanger 25 and the second dehumidifying heat exchanger 26 respectively bear sensible heat load and latent heat load.
In the air conditioning system disclosed in this embodiment, the air to be treated is sequentially subjected to the wet load treatment and the heat load treatment by the connection of the first air four-way valve 33 and the second air four-way valve 34.
The air conditioning system disclosed in this embodiment can realize that solar energy acts on the absorption sub-cycle or directly acts on the compression sub-cycle by switching the first waterway three-way valve 5 and the second waterway three-way valve 6.
In the air conditioning system disclosed in the present embodiment, the solar reheater 15 and the subcooler 18 are preferably plate heat exchangers for assisting heating and cooling by using solar energy.
The air conditioning system disclosed by the embodiment has the operation modes configured to comprise a vapor compression dehumidification refrigeration mode, a solar energy absorption auxiliary vapor compression dehumidification refrigeration mode, a vapor compression humidification refrigeration mode and a solar energy auxiliary vapor compression humidification refrigeration mode; the air conditioning system is configured to be able to switch between different operating modes depending on the seasonal conditions and the stored heat temperature of the hot water storage tank 3.
When the air conditioning system operates in the vapor compression dehumidification cooling mode, the hot water circulation pump 4 and the solution circulation pump 10 are set to the off state, the first port and the second port of the fluorine four-way valve 14 are configured to communicate, and the third port and the fourth port of the fluorine four-way valve 14 are configured to communicate.
When the air conditioning system operates in the vapor compression humidification heating mode, the hot water circulation pump 4 and the solution circulation pump 10 are set to the off state, the first port and the fourth port of the fluorine four-way valve 14 are configured to communicate, and the second port and the third port of the fluorine four-way valve 14 are configured to communicate.
When the air conditioning system is operated in the solar absorption assisted vapor compression dehumidification cooling mode, the hot water circulation pump 4 and the solution circulation pump 10 are set to the on state, the first port and the second port of the four-way fluorine valve 14 are configured to communicate, the third port and the fourth port of the four-way fluorine valve 14 are configured to communicate, the second port and the third port of the first three-way water valve 5 are configured to communicate, and the second port and the third port of the second three-way water valve 6 are configured to communicate.
When the air conditioning system operates in the solar assisted vapor compression humidification heating mode, the hot water circulation pump 4 is set to an on state, the solution circulation pump 10 is set to an off state, the first port and the fourth port of the four-way fluorine valve 14 are configured to communicate, the second port and the third port of the four-way fluorine valve 14 are configured to communicate, the first port and the second port of the first three-way water valve 5 are configured to communicate, and the first port and the second port of the second three-way water valve 6 are configured to communicate.
When the air conditioning system is configured to operate in any one of the vapor compression dehumidification cooling mode, the solar absorption assisted vapor compression dehumidification cooling mode, the vapor compression humidification heating mode or the solar assisted vapor compression humidification heating mode, the compressor 13, the heat dissipation fan 32 and the heat collection circulation pump 2 are all set to be on and operating.
This embodiment makes the system continuously to the air that user side output accords with indoor temperature and humidity demand through the cooperation switching of two air cross valves and two fluorine way three-way valves, and fluorine way cross valve then is used for according to the different refrigeration of switching in season and the mode of heating, and two water route three-way valves adjust the supplementary refrigeration of solar energy input absorption formula or input supplementary compression heat. According to the embodiment, the compression subsystem is coupled with the dehumidification heat exchanger based on adsorption refrigeration to increase the evaporation temperature of the processing wet load, the solar absorption refrigeration subsystem is used for increasing the electric energy efficiency ratio of the refrigeration of the system in summer, and the air energy and the solar energy are simultaneously used in the heating mode in winter to enable the heating energy efficiency to be superior to that of an air source heat pump.
As shown in fig. 1, in the present embodiment operating in the vapor compression dehumidification cooling mode, the compressor 13 is in an operating state, and communicates the first port and the second port, and the third port and the fourth port of the fluorine four-way valve 14, high-temperature refrigerant vapor passes through the reservoir 17 after being cooled by the outdoor heat exchanger 16, and then is divided into the second throttle 19 and the third throttle 20, the refrigerant in the branch of the second throttle 19 passes through the indoor heat exchanger 21 to be evaporated and then enters the gas-liquid separator 22, the refrigerant in the branch of the third throttle 20 is controlled by the first fluorine three-way valve 23 to enter the first dehumidification heat exchanger 25 or the second dehumidification heat exchanger 26, and which dehumidification heat exchanger enters the gas-liquid separator 22 after evaporation is finished in the dehumidification heat exchanger, and then returns to the compressor 13 to complete the cycle. The condensation waste heat of the outdoor heat exchanger 16 is sent to the dehumidification heat exchanger in a regeneration state through the first air four-way valve 33, and then is discharged to the outdoor through the second air four-way valve 34; the ambient air is sent to the dehumidifying heat exchanger in a dehumidifying state through the first air four-way valve 33, sent to the indoor heat exchanger 21 in the fourth air duct 35 through the second air four-way valve 34 to be cooled, and then sent to the indoor.
As shown in fig. 2, in the present embodiment, when the solar energy absorption assisted vapor compression dehumidification refrigeration system operates in the solar energy absorption assisted vapor compression dehumidification refrigeration mode, the operation state of the compression subsystem is the same as the vapor compression dehumidification refrigeration mode, on the basis, the hot water circulation pump 4 and the solution circulation pump 10 are started, the second port and the third port of the first water path three-way valve 5 and the second water path three-way valve 6 are kept communicated, the hot water on the upper portion of the heat storage tank 3 is sent to the generator 7 to provide heat, and then the hot water is returned to the bottom of the heat storage tank 3, the solution in the absorber 9 is heated by the solution circulation pump 10 through the solution heat exchanger 8 and then enters the generator 7 to generate vapor and weak solution, the weak solution flows through the solution heat exchanger 8 and then returns to the absorber 9, the high-temperature vapor enters the condenser 11 to be condensed, the refrigerant vapor returns to the absorber 9 to be absorbed by the weak solution to complete the cycle. In this mode of operation, the cooling waste heat generated by the absorber 9 and condenser 11 of the absorption subsystem and the outdoor heat exchanger 16 of the compression subsystem are used to provide the heat of the regeneration process for the first and second dehumidification heat exchangers 25, 26.
As shown in fig. 3, in the present embodiment, when the present embodiment operates in the vapor compression and humidification heating mode, the first port and the fourth port of the fluorine four-way valve 14 are communicated, the second port and the third port are communicated, the vapor at the outlet of the compressor 13 passes through the fluorine four-way valve 14 and then is distributed to the indoor heat exchanger 21 and the second fluorine three-way valve 24, the refrigerant vapor in the branch of the second fluorine three-way valve 24 enters the dehumidification heat exchanger in the regeneration state, i.e., the first dehumidification heat exchanger 25 or the second dehumidification heat exchanger 26, and then passes through the first fluorine three-way valve 23 and then throttles by the third throttle valve 20, the refrigerant vapor in the branch of the indoor heat exchanger 21 after condensing and releasing heat passes through the second throttle valve 19 and throttles, the two branches of the refrigerant after merging enter the outdoor heat exchanger 16 for evaporation and heat; in this mode, the indoor air enters the dehumidifying heat exchanger in a regeneration state through the fourth port of the first air four-way valve 33 for humidification, and is sent into the fourth air duct 35 by the second air four-way valve 34 for temperature rise and then sent to the indoor; and the cold outdoor air enters the dehumidifying heat exchanger in a dehumidifying state through the second port of the first air four-way valve 33 and is discharged to the outside through the second port of the second air four-way valve 34.
As shown in fig. 4, in the present embodiment, operating in the solar auxiliary vapor compression and humidification heating mode, the operation state of the compression subsystem is the same as that of the vapor compression and humidification heating mode, and the absorption subsystem does not participate in the operation, on the basis, the hot water circulating pump 4 is started, the first ports and the second ports of the first water path three-way valve 5 and the second water path three-way valve 6 are kept communicated, the hot water at the upper part of the hot water storage tank 3 is sent to the solar reheater 15 to provide heat generation, and then the hot water is returned to the bottom of the hot water storage tank 3; in this mode, the refrigerant vapor at the outlet of the outdoor heat exchanger 16 further absorbs heat in the solar reheater 15, and the suction temperature and pressure of the compressor 13 are raised.
The embodiment discloses a solar energy auxiliary vapor compression heat pump dehumidification air-conditioning system, based on absorption refrigeration utilization of low-grade solar thermal energy, the high temperature adsorption characteristic of solid-state adsorption dehumidification, combine the refrigerated stability of conventional compression, constitute solar energy auxiliary vapor compression heat pump dehumidification air-conditioning system through the mode of system coupling, under the prerequisite that satisfies stable refrigeration heating demand in all seasons and indoor humiture travelling comfort, utilize partial solar energy to improve the performance of system, make full use of used heat makes the overall energy utilization efficiency of system promote simultaneously.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A solar-assisted vapor compression heat pump dehumidification air-conditioning system is characterized by comprising the following steps:
the system comprises a solar heat collector, a heat collection circulating pump, a heat storage water tank, a hot water circulating pump, a first water path three-way valve, a second water path three-way valve, a generator, a solution heat exchanger, an absorber, a solution circulating pump, a condenser, a first throttle valve, a compressor, a fluorine path four-way valve, a solar reheater, an outdoor heat exchanger, a liquid storage device, a subcooler, a second throttle valve, a third throttle valve, an indoor heat exchanger, a gas-liquid separator, a first fluorine path three-way valve, a second fluorine path three-way valve, a first dehumidification heat exchanger, a second dehumidification heat exchanger, a first induced draft fan, a second induced draft fan, a first air duct, a second air duct, a third air duct, a heat radiation fan, a first air;
the solar collector is configured to absorb solar radiant energy;
an outlet of the solar heat collector is connected with a first inlet of the heat storage water tank, a first outlet of the heat storage water tank is connected with an inlet of the heat collection circulating pump, and an outlet of the heat collection circulating pump is connected with an inlet of the solar heat collector;
a second outlet of the heat storage water tank is connected with an inlet of the hot water circulating pump, an outlet of the hot water circulating pump is connected with a second port of the first waterway three-way valve, a third port of the first waterway three-way valve is connected with a fourth port of the generator, a fifth port of the generator is connected with a third port of the second waterway three-way valve, and a second port of the second waterway three-way valve is connected with a second inlet of the heat storage water tank;
a first port of the first waterway three-way valve is connected with a first port of the solar reheater, and a second port of the solar reheater is connected with a first port of the second waterway three-way valve;
the third port of the generator is connected with the second port of the solution heat exchanger, the fourth port of the solution heat exchanger is connected with the first inlet of the absorber, the outlet of the absorber is connected with the inlet of the solution circulating pump, the outlet of the solution circulating pump is connected with the third port of the solution heat exchanger, and the first port of the solution heat exchanger is connected with the second port of the generator;
the first port of the generator is connected with the inlet of the condenser, the outlet of the condenser is connected with the inlet of the first throttling valve, the outlet of the first throttling valve is connected with the third port of the subcooler, and the fourth port of the subcooler is connected with the second inlet of the absorber;
the outlet of the compressor is connected with a first port of the fluorine-way four-way valve, a second port of the fluorine-way four-way valve is connected with a fourth port of the solar reheater, a third port of the solar reheater is connected with a first port of the outdoor heat exchanger, a second port of the outdoor heat exchanger is connected with a first port of the liquid accumulator, a second port of the liquid accumulator is connected with a first port of the subcooler, and a second port of the subcooler is respectively connected with a first port of the second throttle valve and a first port of the third throttle valve;
a second port of the second throttling valve is connected with a first port of the indoor heat exchanger, a second port of the indoor heat exchanger is connected with a fourth port of the fluorine-way four-way valve, a third port of the fluorine-way four-way valve is connected with an inlet of the gas-liquid separator, and an outlet of the gas-liquid separator is connected with an inlet of the compressor;
a second port of the third throttle valve is connected with a first port of the first fluorine path three-way valve, a second port of the first fluorine path three-way valve is connected with a second port of the first dehumidification heat exchanger, a first port of the first dehumidification heat exchanger is connected with a third port of the second fluorine path three-way valve, a third port of the first fluorine path three-way valve is connected with a first port of the second dehumidification heat exchanger, a second port of the second dehumidification heat exchanger is connected with a second port of the second fluorine path three-way valve, and a first port of the second fluorine path three-way valve is connected with a fourth port of the fluorine path four-way valve;
the first dehumidification heat exchanger and the first induced draft fan are arranged in the first air duct; the second dehumidification heat exchanger and the second induced draft fan are arranged in the second air duct; the absorber, the condenser, the outdoor heat exchanger and the heat dissipation fan are all arranged in the third air duct; the indoor heat exchanger is arranged in the fourth air duct;
a first port of the first air four-way valve is connected with an inlet of the first air channel, a second port of the first air four-way valve is connected with an outlet of the third air channel, a third port of the first air four-way valve is connected with an inlet of the second air channel, and a fourth port of the first air four-way valve is connected with ambient air;
the first port of the second air four-way valve is connected with the outlet of the first air channel, the second port of the second air four-way valve is connected with the ambient air, the third port of the second air four-way valve is connected with the outlet of the second air channel, and the fourth port of the second air four-way valve is connected with the inlet of the fourth air channel.
2. The solar-assisted vapor-compression heat pump desiccant air-conditioning system of claim 1, wherein the condenser is positioned downwind of the absorber, the outdoor heat exchanger is positioned downwind of the condenser, and the heat rejection fan is positioned downwind of the outdoor heat exchanger.
3. The solar-assisted vapor compression heat pump dehumidification air-conditioning system of claim 1, wherein the solar reheater and the subcooler are plate heat exchangers.
4. The solar-assisted vapor-compression heat pump desiccant air-conditioning system of claim 1, wherein the operating modes of the solar-assisted vapor-compression heat pump desiccant air-conditioning system are configured to include a vapor-compression dehumidification cooling mode, a solar absorption-assisted vapor-compression dehumidification cooling mode, a vapor-compression humidification heating mode, and a solar-assisted vapor-compression humidification heating mode.
5. The solar-assisted vapor-compression heat pump desiccant air-conditioning system of claim 4, wherein the solar-assisted vapor-compression heat pump desiccant air-conditioning system is configured to be switchable between the different operating modes according to mode-switching criteria.
6. The solar-assisted vapor compression heat pump desiccant air-conditioning system of claim 5, wherein the mode switching criteria include seasonal conditions and a storage temperature of the storage tank.
7. The solar-assisted vapor-compression heat pump desiccant air-conditioning system of claim 4, wherein the solar-assisted vapor-compression heat pump desiccant air-conditioning system is configured to operate in the vapor-compression dehumidification cooling mode, the hot water circulation pump and the solution circulation pump are set to be off, the first port and the second port of the fluorine-path four-way valve are configured to communicate, and the third port and the fourth port of the fluorine-path four-way valve are configured to communicate.
8. The solar-assisted vapor-compression heat pump desiccant air-conditioning system of claim 4, wherein the solar-assisted vapor-compression heat pump desiccant air-conditioning system is configured to operate in the vapor-compression humidification heating mode, the hot water circulation pump and the solution circulation pump are set to be off, the first port and the fourth port of the fluorine-path four-way valve are configured to communicate, and the second port and the third port of the fluorine-path four-way valve are configured to communicate.
9. The solar-assisted vapor-compression heat pump desiccant air-conditioning system of claim 4, wherein the solar-assisted vapor-compression heat pump desiccant air-conditioning system is configured to operate in the solar absorption-assisted vapor-compression dehumidification cooling mode, the hot water circulation pump and the solution circulation pump are set to be on, the first port and the second port of the fluorine four-way valve are configured to communicate, the third port and the fourth port of the fluorine four-way valve are configured to communicate, the second port and the third port of the first water three-way valve are configured to communicate, and the second port and the third port of the second water three-way valve are configured to communicate.
10. The solar-assisted vapor compression heat pump desiccant air-conditioning system of claim 4, wherein the solar-assisted vapor compression heat pump desiccant air-conditioning system is configured to operate in the solar-assisted vapor compression humidification heating mode, the hot water circulation pump is set to on, the solution circulation pump is set to off, the first and fourth ports of the fluorine four-way valve are configured to communicate, the second and third ports of the fluorine four-way valve are configured to communicate, the first and second ports of the first water three-way valve are configured to communicate, and the first and second ports of the second water three-way valve are configured to communicate.
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