Solar energy-storage type heat pump air-conditioning system based on solution
Technical field
The invention belongs to design of solar energy, refrigerated air-conditioning system and manufacturing technology field, relate to a kind of heat pump type air conditioning system of the solar energy composite thermal source based on solution with accumulation of energy function.
Background technology
Along with expanding economy, energy shortage has become the principal element of restriction China economic development, and energy problem also becomes worldwide problem simultaneously, a large amount of consumption of fossil energy and face exhaustion and force people to go to seek and utilize regenerative resource.And along with the raising of people's living standard, central air conditioner system is more and more widely used in the building, become the rich and influential family of architectural energy consumption, therefore how regenerative resources such as solar energy are introduced central air conditioner system and solved the instability problem of solar energy by accumulation of energy, to become an important channel alleviating China's energy shortage situation, significant.
The existing building central air conditioner system is taked water-cooled handpiece Water Chilling Units cooling in summer mostly, winter the boiler heat supplying scheme, cooling and heat supply need two covering devices, cause the central air conditioner system initial cost to increase, summer, boiler quit work simultaneously, and handpiece Water Chilling Units was stopped using and all caused large number quipments idle winter.The building central air conditioner system also can be taked air source heat pump cold and heat supply scheme, but air source heat pump exists the COP that freezes summer lower, problems such as unit evaporator surface frosting in winter.The thermic load that handpiece Water Chilling Units is promptly born air-conditioning system in the summer air-conditioning system is also born humidity load, and handpiece Water Chilling Units is to remove the mode that humidity load is taked freeze drying, causes the unit chilled water temperature lower, and the unit performance coefficient is difficult to be improved.
Therefore, solve and how to be implemented in refrigeration and all solar energy to be introduced central air conditioner system and realized accumulation of energy when heating, solve the water-cooled handpiece Water Chilling Units idleness of equipment in winter waste, problems such as the air source heat pump COP that freezes summer is lower, the frosting in winter are also designed and are realized that the wet independent process of heat, the simple high-performance air-conditioner of device structure system become the technical barrier that those skilled in the art press for solution.
Summary of the invention
Technical problem: the objective of the invention is to propose a kind of novel wet independent process of realization summer fever, absorb heat from air by solution winter and make full use of the heat pump type air conditioning system with accumulation of energy function of solar energy, have the existing above-mentioned deficiency of air-conditioning technical now to solve.
Technical scheme: the solar energy-storage type heat pump air-conditioning system that the present invention is based on solution comprises three parts: solution part, hot and cold water part and air-treatment part.Solution partly comprises hot and cold water unit, cooling tower, five magnetic valves, weak solution reservoir, concentrated solution reservoir, solution regenerator, solar thermal collector, three variable frequency pumps, solution control valve, moisturizing control valve and relevant connection pipelines thereof.Whole solution part can be divided into: cooling tower solution loop and solar energy solution loop.In the cooling tower solution loop, first output of hot and cold water unit (the condenser solution output when being hot and cold water unit refrigeration,) link to each other with the solution input of cooling tower, after coming out, the output of cooling tower is divided into two-way, the 4th magnetic valve of leading up to connects the first input end of concentrated solution reservoir, another road connects the first input end of weak solution reservoir by the 5th magnetic valve, weak solution reservoir first output is connected to the moisturizing control valve also connects first variable frequency pump simultaneously by first magnetic valve input, the first input end (the condenser solution input when being hot and cold water unit refrigeration) of first variable frequency pump output termination water chiller/heater group.In the solar energy solution loop, second output of weak solution reservoir connects the input of second variable frequency pump by second magnetic valve, the second frequency conversion delivery side of pump connects the input of solar thermal collector, the input of the output termination solution regenerator of solar thermal collector, the output of solution regenerator connects second input of concentrated solution reservoir, concentrated solution reservoir first output connects second input of weak solution reservoir by solution control valve, concentrated solution reservoir second output connects the input of the 3rd variable frequency pump by the 3rd magnetic valve, the 3rd frequency conversion delivery side of pump connects the solution input of dehumidifier, and the solution output of dehumidifier connects the 3rd input of weak solution reservoir.Hot and cold water partly comprises hot and cold water unit, the 4th water pump, surface cooler and relevant connection pipeline thereof, wherein second output of hot and cold water unit (the evaporimeter chilled water output when being hot and cold water unit refrigeration) links to each other with the input of the 4th water pump, the input of the 4th water pump output and surface cooler joins, second input of the output termination water chiller/heater group of surface cooler (the evaporimeter chilled water input when being hot and cold water unit refrigeration).Air-treatment partly comprises dehumidifier, surface cooler and regenerator and relevant connection air channel thereof, and wherein regenerator and dehumidifier join, and simultaneously dehumidifier also joins with the air input of surface cooler.
Concrete grammar of the present invention is:
During based on the solar energy-storage type heat pump air-conditioning system refrigerating operaton in summer of solution: solution enters cooling tower be heated intensification in the condenser of hot and cold water unit after, in cooling tower, carry out the wet exchange of heat with air, water evaporates in the solution, concentration raises, temperature reduces, enter the concentrated solution reservoir by the 4th magnetic valve (the 5th closed electromagnetic valve this moment) then, concentrated solution is through the 3rd magnetic valve (this moment, solution control valve cut out), enter dehumidifier behind the 3rd variable frequency pump, solution carries out the wet exchange of heat with air in dehumidifier, solution concentration reduces, enter the weak solution reservoir then, weak solution is come out the back by first magnetic valve from weak solution reservoir first output, first variable frequency pump enters hot and cold water unit condenser, carry out heat exchange with cold-producing medium, condensation of refrigerant is become liquid, self temperature raises, and circulates from entering cooling tower once more after the hot and cold water unit comes out.Sensible heat load is bigger in air, moisture evaporates in cooling tower when too much, and is too high for preventing solution concentration, strengthens cooling effect, by regulating the moisturizing control valve, to entering hot and cold water unit (condensing heat exchanger) thus the solution supplementing water concentration of regulating solution in the cooling tower.When the sun is sufficient, enter solar thermal collector after being sucked, pressurize by second variable frequency pump through second magnetic valve after weak solution being come out from the weak solution reservoir, solution temperature raises, enter solution regenerator and air after coming out and carry out the wet exchange of heat, solution is realized regeneration, concentration improves, enter then in the concentrated solution reservoir and store, when dehumidifier needs work, solution comes out from the concentrated solution reservoir, enters dehumidifier through the 3rd magnetic valve, the 3rd variable frequency pump, comes out from dehumidifier at last, finally enter the weak solution reservoir, thereby constitute a loop.The unit chilled water comes out to be sent into surface cooler after the pressurization of the 4th water pump from hot and cold water unit second output in the hot and cold water loop, chilled water carries out heat exchange with air therein, the cooling air, self temperature raises, return once more in the hot and cold water unit evaporimeter with unit in cold-producing medium carry out heat exchange, participate in circulation after cooling is come out once more.In the air-treatment part, indoor return air will wherein enter atmosphere behind portion of air process regenerator and the new air heat-exchange, remainder carries out the wet exchange of heat with new wind at dehumidifier and solution, air is dehumidified, enter surface cooler then, air is processed to ventilation state in surface cooler, send into indoor then.
During based on the operation of the solar energy-storage type heat pump air-conditioning system winter heating of solution: solution carries out with air in cooling tower that heat is wet to exchange that (solution temperature is lower than air themperature, the partial pressure of water vapor of solution is less than or equal to airborne partial pressure of water vapor), solution absorbs heat and moisture from air, concentration reduces, temperature raises, enter the weak solution reservoir by the 5th magnetic valve (the 4th closed electromagnetic valve this moment) then, weak solution is through first magnetic valve, send into hot and cold water unit evaporimeter behind first variable frequency pump, solution carries out heat exchange with cold-producing medium therein, solution is emitted heat, temperature reduces, carry out the wet exchange of heat from entering cooling tower and air after the hot and cold water unit comes out once more, thereby form circulation.When the sun is sufficient, weak solution is sucked by second variable frequency pump through second magnetic valve after coming out from the weak solution reservoir, enter solar thermal collector after the pressurization, solution temperature raises, enter solution regenerator and air after coming out and carry out the wet exchange of heat, solution concentration improves, enter then in the concentrated solution reservoir and to store that (dehumidifier was not worked when winter, unit heated, so the 3rd magnetic valve, the 3rd variable frequency pump also quits work), when solution control valve is opened, concentrated solution enters the weak solution reservoir by solution control valve, regulate the solution concentration in the weak solution reservoir, thereby constitute the loop.Unit institute heat supply water comes out to be sent into surface cooler after the pressurization of the 4th water pump from hot and cold water unit second output in the hot and cold water loop, hot water carries out heat exchange with air therein, adds hot-air, and self temperature reduces, return then in the hot and cold water unit condenser with unit in cold-producing medium carry out heat exchange
Temperature raises, and participates in circulation after coming out once more.In the air-treatment part, dehumidifier is not worked winter, and indoor return air will wherein enter atmosphere behind portion of air process regenerator and the new air heat-exchange, and remainder enters surface cooler after new wind mixes, air is processed to ventilation state in surface cooler, send into indoor then.
Beneficial effect:
1, the solar energy-storage type heat pump air-conditioning system based on solution of the present invention's proposition, solved the problem of the solar energy regenerative resource being introduced simultaneously air-conditioning system refrigeration in summer and winter heating, and realized solar energy accumulation based on solution, solve the instability problem of solar energy, made full use of the solar energy regenerative resource.
2, the solar energy-storage type heat pump air-conditioning system based on solution can realize water-cooled handpiece Water Chilling Units function in summer, simultaneously can realize with the air being that origin of heat heats in the winter time, solve original handpiece Water Chilling Units equipment idle problem in winter, improved utilization rate of equipment and installations, reduced initial cost.
During 3, based on the solar energy-storage type heat pump air-conditioning system refrigerating operaton in summer of solution, realized the wet independent process of heat of air conditioner load, solution is partly born except that humidity load, and chilled water is only born sensible heat load, can take the chilled water of higher temperature, make the COP of handpiece Water Chilling Units be greatly enhanced.
The inevitable frosting problem of institute when 4, thoroughly having solved the operation of existing air source heat pump winter heating based on the solar energy-storage type heat pump air-conditioning system of solution has improved the heating efficiency of heat pump, has increased the life-span and the reliability of system simultaneously.
Description of drawings:
Fig. 1 is the solar energy-storage type heat pump air-conditioning system schematic diagram that the present invention is based on solution.
Have among the above figure: cooling tower 1; The 4th magnetic valve 2; The 5th magnetic valve 3; Weak solution reservoir 4; Weak solution reservoir first input end 4a; The weak solution reservoir second input 4b; The weak solution reservoir second output 4c; Weak solution reservoir the 3rd input 4d; The weak solution reservoir first output 4e; Solar thermal collector 5; Solution regenerator 6; Concentrated solution reservoir 7; Concentrated solution reservoir first input end 7a; The concentrated solution reservoir second input 7b; The concentrated solution reservoir second output 7c; The concentrated solution reservoir first output 7d; The 3rd magnetic valve 8; Solution control valve 9; Second variable frequency pump 10; Second magnetic valve 11; The 3rd variable frequency pump 12; Moisturizing control valve 13; First magnetic valve 14; First variable frequency pump 15; Hot and cold water unit 16; Hot and cold water unit first input end 16a; The hot and cold water unit first output 16b; The hot and cold water unit second input 16c; The hot and cold water unit second output 16d; The 4th water pump 17; Dehumidifier 18; Regenerator 19; Surface cooler 20.
The specific embodiment:
1 further specify the specific embodiment of the present invention in conjunction with the accompanying drawings: the solar energy-storage type heat pump air-conditioning system that the present invention is based on solution comprises three parts: solution part, hot and cold water part and air-treatment part.Concrete connected mode is that the hot and cold water unit first output 16b links to each other with the solution input of cooling tower 1, the output of cooling tower 1 meets the first input end 7a of concentrated solution reservoir by the 4th magnetic valve 2 respectively and meets the first input end 4a of weak solution reservoir by the 5th magnetic valve 3, the weak solution reservoir first output 4e is connected to moisturizing control valve 13 also connects first variable frequency pump 15 simultaneously by first magnetic valve 14 input, the first input end 16a of the output termination water chiller/heater group of first variable frequency pump 15.The second output 4c of weak solution reservoir connects the input of second variable frequency pump 10 by second magnetic valve 11, the input of the output termination solar thermal collector 5 of second variable frequency pump 10, the input of the output termination solution regenerator 6 of solar thermal collector 5, the second input 7b of the output termination concentrated solution reservoir of solution regenerator 6, the concentrated solution reservoir first output 7d meets the second input 4b of weak solution reservoir by solution control valve 9, the concentrated solution reservoir second output 7c connects the input of the 3rd variable frequency pump 12 by the 3rd magnetic valve 8, the solution input of the output termination dehumidifier 18 of the 3rd variable frequency pump 12, the solution output of dehumidifier 18 connect the 3rd input 4d of weak solution reservoir.The second output 16d of hot and cold water unit meets the input of the 4th water pump 17, the input of the output termination surface cooler 20 of the 4th water pump 17, the second input 16c of the output termination water chiller/heater group of surface cooler 20 in the hot and cold water part.Regenerator 19 joins with dehumidifier 18 in the air-treatment part, and dehumidifier 18 also joins with the air input of surface cooler 20 simultaneously.
Summer of the present invention, the detailed process of refrigerating operaton was: enter cooling tower 1 solution in the solution part is heated intensification in hot and cold water unit 16 (condensing heat exchanger) after, in cooling tower 1, carry out the wet exchange of heat with air, water evaporates in the solution, concentration raises, temperature reduces, enter concentrated solution reservoir 7 by the 4th magnetic valve 2 (this moment, the 5th magnetic valve 3 cut out) then, concentrated solution is through the 3rd magnetic valve 8 (this moment, solution control valve 9 cut out), enter dehumidifier 18 behind the 3rd variable frequency pump 12, solution carries out the wet exchange of heat with air in dehumidifier 18, solution concentration reduces, enter weak solution reservoir 4 then, weak solution is through first magnetic valve 14, enter water chiller/heater group 16 (condensing heat exchanger) behind first variable frequency pump 15, carry out heat exchange with cold-producing medium, condensation of refrigerant is become liquid, self temperature raises, and circulates from entering cooling tower 1 once more after hot and cold water unit 16 comes out.Sensible heat load is bigger in air, moisture evaporates in cooling tower 1 when too much, and is too high for preventing solution concentration, strengthens cooling effect, by control moisturizing control valve 13, to entering hot and cold water unit 16 (condensing heat exchanger) thus the solution supplementing water concentration of regulating solution in the cooling tower 1.
When the sun is sufficient, after weak solution is come out from weak solution reservoir 4 in the solar energy solution loop through second magnetic valve 11, enter solar thermal collector 5 behind second variable frequency pump 10, solution temperature raises, enter solution regenerator 6 after coming out and carry out the wet exchange of heat with air, solution is realized regeneration, concentration improves, enter then in the concentrated solution reservoir 7 and store, when dehumidifier 18 needs work, solution comes out from concentrated solution reservoir 7, through the 3rd magnetic valve 8, the 3rd variable frequency pump 12 enters dehumidifier 18, after coming out from dehumidifier 18, finally enter weak solution reservoir 4, thereby constitute a loop.The unit chilled water comes out through entering surface cooler 20 behind the 4th water pump 17 from the hot and cold water unit second output 16d in the hot and cold water loop, chilled water carries out heat exchange with air therein, the cooling air, self temperature raises, return once more in the hot and cold water unit 16 (evaporating heat exchanger) with unit in cold-producing medium carry out heat exchange, participate in circulation after coming out once more.In the air-treatment part, indoor return air will wherein enter atmosphere behind portion of air process regenerator 19 and the new air heat-exchange, remainder carries out the wet exchange of heat with new wind at dehumidifier 18 and solution, air is dehumidified, enter surface cooler 20 then, air is processed to ventilation state in surface cooler 20, send into indoor then.
The detailed process of winter heating of the present invention operation is: the solution in the solution part carries out the wet exchange of heat with air in cooling tower 1, the concentration that is lower than air themperature and regulator solution by the control solution temperature realizes that the partial pressure of water vapor in the solution is less than or equal to airborne partial pressure of water vapor, can guarantee that then solution absorbs heat and moisture from air, concentration reduces, temperature raises, enter weak solution reservoir 4 by the 5th magnetic valve 3 (this moment, the 4th magnetic valve 2 cut out) then, weak solution is through first magnetic valve 14, enter water chiller/heater group 16 (evaporating heat exchanger) behind first variable frequency pump 15, solution carries out heat exchange with cold-producing medium therein, solution is emitted heat, temperature reduces, carry out the wet exchange of heat from entering cooling tower 1 after hot and cold water unit 16 comes out once more with air, circulate thereby form.When the sun is sufficient, after weak solution is come out from weak solution reservoir 4 in the solar energy solution loop through entering solar thermal collector 5 behind second magnetic valve 11, second variable frequency pump 10, solution temperature raises, enter solution regenerator 6 after coming out and carry out the wet exchange of heat with air, solution obtains regeneration, and concentration improves, and enters then to store in the concentrated solution reservoir 7 that (winter air-conditioning system dehumidification device is not worked, so the 3rd magnetic valve 8 cuts out, the 3rd variable frequency pump 12 quits work), realize storing of solar energy.When 1 solution concentration in the cooling tower was low, by regulator solution control valve 9 apertures, concentrated solution entered weak solution reservoir 4 through solution control valve 9 from concentrated solution reservoir 7, thereby realized solution concentration in the cooling tower 1 is regulated.Unit institute heat supply water comes out to be sent into surface cooler 20 after 17 pressurizations of the 4th water pump from the hot and cold water unit second output 16d in the hot and cold water loop, hot water carries out heat exchange with air therein, add hot-air, self temperature reduces, return then in the hot and cold water unit 16 (condensing heat exchanger) with unit in cold-producing medium carry out heat exchange, temperature raises, and participates in circulation after coming out once more.In the air-treatment part, dehumidifier is not worked for 18 winters, and indoor return air will wherein enter atmosphere behind portion of air process regenerator 19 and the new air heat-exchange, and remainder enters surface cooler 20 after new wind mixes, air is processed to ventilation state in surface cooler 20, send into indoor then.
During winter heating of the present invention operation solution in cooling tower from air the key of draw heat be: 1, solution temperature is lower than air themperature, thereby the assurance heat is passed to solution from air, the present invention enters the liquid inventory of hot and cold water unit (being the evaporimeter of refrigeration system this moment) by the frequency shift of controlling first variable frequency pump, thereby guarantees that the solution temperature that enters cooling tower is lower than air themperature; 2, partial pressure of water vapor makes water vapour enter solution from air less than airborne partial pressure of water vapor in the solution, and water recovery is emitted heat and given solution.The size of partial pressure of water vapor depends on the concentration of solution in solution temperature one timing solution, and the concentration of control solution just can realize the control of partial pressure of water vapor in the solution.The present invention is by the regulator solution control valve, regulate the liquid inventory that enters in the concentrated solution reservoir in the weak solution reservoir, thereby realize carry out the control of the solution concentration of the wet exchange of heat in the cooling tower with air, solution concentration hour is driven big solution control valve, strengthen the injection of concentrated solution, improve the concentration of solution in the weak solution reservoir.The present invention has certain altitude poor by making concentrated solution reservoir and weak solution reservoir in vertical direction, guarantees that concentrated solution can enter the weak solution reservoir by solution control valve.