CN103900178B - A kind of earth source heat pump central air-conditioning system of energy storage - Google Patents
A kind of earth source heat pump central air-conditioning system of energy storage Download PDFInfo
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Abstract
The present invention relates to a kind of earth source heat pump central air-conditioning system of energy storage, including cooling cycle system, energy storage equipment and air conditioner circulating system.Cooling cycle system includes controlling valve, earth source heat pump compressor, geothermal heat exchanger unit；Energy storage equipment includes the energy storage tank equipped with refrigerating medium and is located at the heat exchange coil in energy storage tank；Air conditioner circulating system includes input pipe, air-conditioning circulating pump and return duct.Earth source heat pump compressor sucks the high temperature and high pressure gas of compression cold-producing medium generation to carry out cold and hot exchange either directly through geothermal heat exchanger unit and underground heat active layer and carries out cold and hot exchange by heat exchange coil with the refrigerating medium in energy storage tank, realize the direct cold and hot exchange of cold-producing medium and geothermal source and refrigerating medium, decrease cold and hot exchange link, effectively reduce the operation energy consumption of whole central air conditioner system.
Description
Technical field
The present invention relates to energy storage technologies field, more particularly, it relates to a kind of earth source heat pump central air-conditioning system of energy storage.
Background technology
Earth source heat pump in correlation technique provides refrigeration or heating demand by the building that is utilized as of underground shallow layer temperature stabilization thermal source, underground cold source is absorbed in actual use mainly through refrigerating medium (such as water), cold and hot energy exchange is carried out with the heat exchanger in the condenser of ground-source heat pump host or vaporizer more in the duct by the transmission of pump, the use system of refrigerating medium circulating pump is in operation the invisible corresponding energy consumption that adds, and refrigerating medium and the cold-producing medium cold and hot exchange of the heat exchanger in ground-source heat pump host make cold and hot amount service efficiency reduce.
Along with the implementation of country's step price, conventional ground source heat pump central air-conditioning system has good prospect in utilizing reproducible underground cold source, but cannot break away from the bottleneck of the need for electricity in peak of power consumption stage.
Then discharge when peak electricity tariff although available relevant energy accumulating technique carries out accumulation of energy when electricity price low level, avoid the operation of heat pump main frame, but inevitably needing refrigerating medium to make (such as ethylene glycol) in actual use is carrier, carries out cold and hot exchange in the vaporizer position of heat pump main frame and then pass through and can store cold and hot in energy storage equipment.
Wherein refrigerating medium makes efficiency decline as the carrier of energy source in the exchange of twice energy carried out between heat pump and energy storage tank, the operation of delivery pump too increases the input of the operation energy consumption of whole system, pipeline and equipment the cost investment of whole system also can be made to increase in the transmission.
Summary of the invention
The technical problem to be solved in the present invention is in that, it is provided that a kind of earth source heat pump central air-conditioning system of energy storage.
The technical solution adopted for the present invention to solve the technical problems is: a kind of earth source heat pump central air-conditioning system of energy storage of structure, including: cooling cycle system, energy storage equipment and air conditioner circulating system；
Described cooling cycle system includes:
Controlling valve, be used for regulating refrigeration and heating change working, described control valve includes first passage, second channel, third channel, fourth lane；During cooling condition, described first passage connects with described second channel, and described third channel connects with described fourth lane；When heating operating mode, described first passage connects with described fourth lane, and described second channel connects with described third channel；
Earth source heat pump compressor, including for sucking the cold-producing medium entrance to be compressed, and by outlet that the high-temperature high-pressure refrigerant gas after compression is discharged；Described entrance connects with described first passage, and described outlet connects with described third channel；
Geothermal heat exchanger unit, is used for burying in underground heat active layer to carry out cold and hot exchange with the earth, and described geothermal heat exchanger unit connects with described fourth lane；
Described energy storage equipment includes the energy storage tank equipped with refrigerating medium and is located at the heat exchange coil in described energy storage tank, and the two ends of heat exchange coil connect with described geothermal heat exchanger unit and second channel respectively；
Described refrigerating medium absorbs the energy of cold-producing medium in described heat exchange coil and with refrigeration or heats；
Described air conditioner circulating system includes:
Input pipe, two ends connect with described energy storage tank and air conditioning terminal respectively；
Air-conditioning circulating pump, is arranged on described input pipe so that the refrigerating medium in described energy storage tank is pumped to described air conditioning terminal, carries out cold and hot exchange with indoor environment；
Return duct, two ends connect with described energy storage tank and described air conditioning terminal respectively, so that the refrigerating medium after completing cold and hot exchange is back to described energy storage tank.
Preferably, described geothermal heat exchanger unit includes several geothermal heat exchangers being arranged in parallel.
Preferably, each described geothermal heat exchanger is equipped with ground-coupled heat exchanger valve.
Preferably, described cooling cycle system also includes control unit,
Described control unit includes the temperature sensor being arranged in described energy storage tank and the controller being electrically connected with described temperature sensor, and described controller is electrically connected with each described ground-coupled heat exchanger valve；
Described temperature sensor obtains in described energy storage tank temperature change signal and passes to described controller, and described controller controls the unlatching quantity of the ground-coupled heat exchanger valve of described geothermal heat exchanger unit according to temperature change signal.
Preferably, described temperature sensor is arranged near the upper end of described energy storage tank.
Preferably, described heat exchange coil includes the first port connected with described geothermal heat exchanger unit and the second port connected with described second channel, and described first port is arranged on the lower end of described energy storage tank, and described second port is arranged on the upper end of described energy storage tank.
Preferably, described heat exchange coil rotary setting from bottom to top in the shape of a spiral.
Preferably, it is provided with choke valve between described geothermal heat exchanger unit and described first port.
Preferably, described input pipe connects with the upper end of described energy storage tank, to carry the refrigerating medium of energy storage tank upper end to described air conditioning terminal；
Described return duct connects with the lower end of described energy storage tank, to input refrigerating medium to described energy storage tank lower end.
Preferably, described geothermal heat exchanger unit is arranged on underground and stablizes in thermal source layer and carry out cold and hot exchange stablizing thermal source with underground.
Implement the earth source heat pump central air-conditioning system of energy storage of the present invention, have the advantages that sucking the pressure of cold-producing medium generation high-temperature high-pressure refrigerant by the present invention by earth source heat pump compressor carries out cold and hot exchange either directly through geothermal heat exchanger unit and underground heat active layer and carry out cold and hot exchange by heat exchange coil with the refrigerating medium in energy storage tank, realize the direct cold and hot exchange of cold-producing medium and geothermal source and refrigerating medium, decrease cold and hot exchange link, effectively reduce the operation energy consumption of whole central air conditioner system.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the earth source heat pump central air-conditioning system of energy storage systematic schematic diagram in a preferred embodiment of the invention.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and effect are more clearly understood from, now comparison accompanying drawing describes the specific embodiment of the present invention in detail.
As it is shown in figure 1, the earth source heat pump central air-conditioning system of energy storage in a preferred embodiment of the invention includes cooling cycle system 10, energy storage equipment 20 and air conditioner circulating system 30.
Further, cooling cycle system 10 includes controlling valve 11, earth source heat pump compressor 12 and geothermal heat exchanger unit 13.Control valve 11 for regulating the conversion of refrigeration and heating operating mode, control valve 11 and include first passage 111, second channel 112, third channel 113 and fourth lane 114.When cooling condition, first passage 111 connects with second channel 112, and third channel 113 connects with fourth lane 114；When heating operating mode, first passage 111 connects with fourth lane 114, and second channel 112 connects with third channel 113, it is preferable that controlling valve 11 is cross valve, in other embodiments, controls valve 11 and is alternatively other control valves replacements identical with cross valve function.
Earth source heat pump compressor 12 includes for sucking cold-producing medium with the entrance 121 being compressed and the outlet 122 discharged by the high temperature and high pressure gas after compression.Wherein, entrance 121 connects with first passage 111, and outlet 122 connects with third channel 113.
In certain embodiments, geothermal heat exchanger unit 13 is used for burying in underground heat active layer to carry out cold and hot exchange with the earth, it is preferable that geothermal heat exchanger unit 13 is arranged on underground and stablizes in thermal source layer and carry out cold and hot exchange stablizing thermal source with underground.Geothermal heat exchanger unit 13 includes multiple geothermal heat exchanger 131 being arranged in parallel, and each geothermal heat exchanger 131 is equipped with ground-coupled heat exchanger valve 132, individually to control each geothermal heat exchanger 131 to be turned on and off.
Further, energy storage equipment 20 includes the energy storage tank 21 equipped with refrigerating medium and is located at the heat exchange coil 22 in energy storage tank 21, it is preferable that refrigerating medium is water or ethylene glycol etc., and the two ends of heat exchange coil 22 connect with geothermal heat exchanger unit 13 and second channel 112 respectively.
In certain embodiments, heat exchange coil 22 includes the first port 221 connected with geothermal heat exchanger unit 13 and the second port 222 connected with second channel 112, preferably, the first port 221 is arranged on the lower end of energy storage tank 21, and the second port 222 is arranged on the upper end of energy storage tank 21.Heat exchange coil 22 rotary setting from bottom to top in the shape of a spiral, so that its internal cold-producing medium refrigerating medium fully and in energy storage tank 21 carries out cold and hot exchange.
It is to be appreciated that in other embodiments, first port the 221, second port 222 may also be arranged on the two relative side of energy storage tank 21, and heat exchange coil 22 also can be presented back bending folding and arrange.
It is provided with choke valve 133, to regulate the flow of cold-producing medium between geothermal heat exchanger unit 13 and the first port 221.
In certain embodiments, air conditioner circulating system 30 includes input pipe 31, air-conditioning circulating pump 32 and return duct 33, and the two ends of input pipe 31 connect with energy storage tank 21 and air conditioning terminal 34 respectively；Air-conditioning circulating pump 32 is arranged on input pipe 31 so that the refrigerating medium in energy storage tank 21 is pumped to air conditioning terminal 34, carries out cold and hot exchange with indoor environment；The two ends of return duct 33 connect with energy storage tank 21 and air conditioning terminal 34 respectively, to be back in energy storage tank 21 by the refrigerating medium after completing cold and hot exchange.
Preferably, input pipe 31 connects with the upper end of energy storage tank 21, to carry the refrigerating medium of energy storage tank 21 upper end to air conditioning terminal 34；Return duct 33 connects with the lower end of energy storage tank 21, to input refrigerating medium to energy storage tank 21 lower end.
In certain embodiments, cooling cycle system 10 also includes control unit 14, control unit 14 includes the temperature sensor 141 being arranged in energy storage tank 21 and the controller 142 being electrically connected with temperature sensor 141, and controller 142 is also electrically connected with each ground-coupled heat exchanger valve 132.
Preferably, temperature sensor 141 is arranged on the upper end of energy storage tank 21, to obtain the temperature change signal of the refrigerating medium that energy storage tank 21 outwards exports and to pass to controller 142, controller 142 controls the unlatching quantity of the ground-coupled heat exchanger valve 132 of geothermal heat exchanger unit 13 according to the change of temperature signal.
Below in conjunction with accompanying drawing 1, the working method when cooling condition and heating operating mode of the earth source heat pump central air-conditioning system of energy storage in the present embodiment is illustrated.
When utilizing native system to freeze in electricity price low ebb section, adjusting control valve 11, make first passage 111 connect with second channel 112, third channel 113 connects with fourth lane 114.Earth source heat pump compressor 12 in cooling cycle system 10 sucks cold-producing medium, and is compressed into the refrigerant gas of High Temperature High Pressure by exporting 122 discharges, flows through third channel 113 and fourth lane 114 enters the geothermal heat exchanger 131 being imbedded in underground.
The refrigerant gas of High Temperature High Pressure gives off heat in geothermal heat exchanger 131 in thermal source layer and becomes supercool refrigerant liquid, supercool refrigerant liquid becomes the two-phase fluid of low-temp low-pressure after flowing through choke valve 133 blood pressure lowering, and enter heat exchange coil 22 by the first port 221, cold is transferred to the refrigerating medium in energy storage tank 21, reduce the temperature of refrigerating medium, the cold of cold-producing medium is absorbed by refrigerating medium and is stored in energy storage tank 21, uses in order to electricity price peak phase.Cold-producing medium after heat absorption flashes to gas and flows through second channel 112 and first passage 111, the entrance 121 of earth source heat pump compressor 12 again suck and circulate next time.
When air conditioning terminal 34 is freezed, open air-conditioning circulating pump 32, the low temperature refrigerating medium in energy storage tank 21 is transported to air conditioning terminal 34 through input pipe 31, for reducing the air themperature of indoor.Through air conditioning terminal 34 heat exchanger with indoor carry out cold and hot exchange after high temperature in absorption chamber make refrigerating medium heat up, under the effect of air-conditioning circulating pump 32, the refrigerating medium of high temperature passes through return duct 33 and is again back in energy storage tank 21 to carry out circulation once.
When this cooling condition, low-temperature refrigerant is carried from bottom to top, and high temperature refrigerating medium is delivered into energy storage tank 21 by down, and this process can guarantee that the cold of low-temperature refrigerant fully absorbs in cold and hot exchange process, high/low temperature mix homogeneously, and the cold-producing medium of high temperature is exported by the second port 222 of upper end.
Temperature sensor 141 senses the variations in temperature of the refrigerating medium in energy storage tank 21, temperature signal is transferred to controller 142 simultaneously, and controller 142 can adjust the unlatching quantity of ground-coupled heat exchanger valve 132 according to the temperature of refrigerating medium in energy storage tank 21 and the temperature difference of air conditioning terminal 34 indoor temperature.When the temperature drift of refrigerating medium in energy storage tank 21, the unlatching quantity of ground-coupled heat exchanger valve 132 is increased by, and accelerates the refrigeration of refrigerating medium in energy storage tank 21；When in energy storage tank 21, the temperature of refrigerating medium is on the low side, the unlatching quantity of ground-coupled heat exchanger valve 132 just reduces, and reduces the refrigeration of refrigerating medium in energy storage tank 21.Whole process ensures that the indoor temperature of air conditioning terminal 34 will not be floated, it is achieved the whole cold and hot balance of earth source heat pump central air-conditioning system of energy storage.
When utilizing native system to carry out heating in electricity price low ebb section, adjusting control valve 11, make first passage 111 connect with fourth lane 114, second channel 112 connects with third channel 113.Earth source heat pump compressor 12 in cooling cycle system 10 sucks cold-producing medium, and it is compressed into the refrigerant gas of High Temperature High Pressure by exporting 122 discharges, flow through third channel 113 and second channel 112, and enter heat exchange coil 22 by the second port 222, transfer heat to the refrigerating medium in energy storage tank 21, raising the temperature of refrigerating medium, the heat of cold-producing medium is absorbed by refrigerating medium and is stored in energy storage tank 21, uses in order to electricity price peak phase.
High-temperature high-pressure refrigerant through with the cold and hot exchange of refrigerating medium after become supercool refrigerant liquid, supercool refrigerant liquid becomes low-temp low-pressure two-phase fluid after choke valve 133 blood pressure lowering, enter the geothermal heat exchanger 131 under burial ground, from thermal source layer, heat absorption flashes to gas, refrigerant gas after evaporation endothermic flows through fourth lane 114 and first passage 111, the entrance 121 of earth source heat pump compressor 12 again suck and circulate next time.
When air conditioning terminal 34 needs heating, open air-conditioning circulating pump 32, the high temperature refrigerating medium in energy storage tank 21 is transported to air conditioning terminal 34 through input pipe 31, for promoting the air themperature of indoor.Giving off heat to indoor after heat exchanger and the indoor of air conditioning terminal 34 carry out cold and hot exchange makes refrigerating medium lower the temperature, and under the effect of air-conditioning circulating pump 32, the refrigerating medium of low temperature passes through return duct 33 and is again back in energy storage tank 21 to carry out circulation once.
When this heating operating mode, high temperature refrigerant is carried from top to bottom, and low temperature refrigerating medium is delivered into energy storage tank 21 by down, due to high temperature all the time in upper end, this process can guarantee that the heat of low-temperature refrigerant fully absorbs in cold and hot exchange process, and exported the cold-producing medium of low temperature by the first port 221 of lower end.
Temperature sensor 141 senses the variations in temperature of the refrigerating medium in energy storage tank 21, temperature signal is transferred to controller 142 simultaneously, and controller 142 can adjust the unlatching quantity of ground-coupled heat exchanger valve 132 according to the temperature of refrigerating medium in energy storage tank 21 and the temperature difference of air conditioning terminal 34 indoor temperature.When the temperature drift of refrigerating medium in energy storage tank 21, the unlatching quantity of ground-coupled heat exchanger valve 132 just reduces, and reduces the heating of refrigerating medium in energy storage tank 21；When in energy storage tank 21, the temperature of refrigerating medium is on the low side, the unlatching quantity of ground-coupled heat exchanger valve 132 is increased by, and accelerates the heating of refrigerating medium in energy storage tank 21.Whole process ensures that the indoor temperature of air conditioning terminal 34 will not be floated, it is achieved the whole cold and hot balance of earth source heat pump central air-conditioning system of energy storage.
It is to be appreciated that above-mentioned each technical characteristic can use and unrestricted in any combination.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (7)
1. an earth source heat pump central air-conditioning system of energy storage, it is characterised in that including: cooling cycle system (10), energy storage equipment (20) and air conditioner circulating system (30)；
Described cooling cycle system (10) including:
Controlling valve (11), be used for regulating refrigeration and heating change working, described control valve (11) includes first passage (111), second channel (112), third channel (113), fourth lane (114)；During cooling condition, described first passage (111) connects with described second channel (112), and described third channel (113) connects with described fourth lane (114)；When heating operating mode, described first passage (111) connects with described fourth lane (114), and described second channel (112) connects with described third channel (113)；
Earth source heat pump compressor (12), including for sucking the cold-producing medium entrance (121) to be compressed, and by outlet (122) that the high-temperature high-pressure refrigerant gas after compression is discharged；Described entrance (121) connects with described first passage (111), and described outlet (122) connects with described third channel (113)；
Geothermal heat exchanger unit (13), is used for burying in underground heat active layer to carry out cold and hot exchange with the earth, and described geothermal heat exchanger unit (13) connects with described fourth lane (114)；
Described energy storage equipment (20) includes the energy storage tank (21) equipped with refrigerating medium and the heat exchange coil (22) being located in described energy storage tank (21), and the two ends of heat exchange coil (22) connect with described geothermal heat exchanger unit (13) and second channel (112) respectively；
Described refrigerating medium absorbs the energy of cold-producing medium in described heat exchange coil (22) and with refrigeration or heats；
Described air conditioner circulating system (30) including:
Input pipe (31), two ends connect with described energy storage tank (21) and air conditioning terminal (34) respectively；
Air-conditioning circulating pump (32), is arranged on described input pipe (31) so that the refrigerating medium in described energy storage tank (21) is pumped to described air conditioning terminal (34), carries out cold and hot exchange with indoor environment；
Return duct (33), two ends connect with described energy storage tank (21) and described air conditioning terminal (34) respectively, so that the refrigerating medium after completing cold and hot exchange is back to described energy storage tank (21)；
Described geothermal heat exchanger unit (13) includes several geothermal heat exchangers being arranged in parallel (131)；
Each described geothermal heat exchanger (131) is equipped with ground-coupled heat exchanger valve (132)；
Described cooling cycle system (10) also includes control unit (14)；
Described control unit (14) includes the temperature sensor (141) being arranged in described energy storage tank (21) and the controller (142) being electrically connected with described temperature sensor (141), and described controller (142) is electrically connected with each described ground-coupled heat exchanger valve (132)；
Described temperature sensor (141) obtains described energy storage tank (21) interior temperature change signal and passes to described controller (142), and described controller (142) controls the unlatching quantity of the ground-coupled heat exchanger valve (132) of described geothermal heat exchanger unit (13) according to temperature change signal.
2. earth source heat pump central air-conditioning system of energy storage according to claim 1, it is characterised in that described temperature sensor (141) is arranged near the upper end of described energy storage tank (21).
3. earth source heat pump central air-conditioning system of energy storage according to claim 1, it is characterized in that, described heat exchange coil (22) includes the first port (221) connected with described geothermal heat exchanger unit (13) and the second port (222) connected with described second channel (112), described first port (221) is arranged on the lower end of described energy storage tank (21), and described second port (222) is arranged on the upper end of described energy storage tank (21).
4. earth source heat pump central air-conditioning system of energy storage according to claim 3, it is characterised in that described heat exchange coil (22) rotary setting from bottom to top in the shape of a spiral.
5. earth source heat pump central air-conditioning system of energy storage according to claim 3, it is characterised in that be provided with choke valve (133) between described geothermal heat exchanger unit (13) and described first port (221).
6. earth source heat pump central air-conditioning system of energy storage according to claim 1, it is characterised in that described input pipe (31) connects with the upper end of described energy storage tank (21), to carry the refrigerating medium of energy storage tank (21) upper end to described air conditioning terminal (34)；
Described return duct (33) connects with the lower end of described energy storage tank (21), to input refrigerating medium to described energy storage tank (21) lower end.
7. earth source heat pump central air-conditioning system of energy storage according to claim 1, it is characterised in that described geothermal heat exchanger unit (13) is arranged on underground and stablizes in thermal source layer and carry out cold and hot exchange stablizing thermal source with underground.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106642855A (en) * | 2016-11-16 | 2017-05-10 | 南京航空航天大学 | Airborne evaporation cycle refrigeration comprehensive heat management system and method and application thereof |
| CN109944626B (en) * | 2019-04-08 | 2020-12-29 | 东南大学 | Tunnel phase change cold accumulation cooling system |
| CN112303827B (en) * | 2020-10-30 | 2022-05-20 | 青岛海尔空调电子有限公司 | Control method of combined air-conditioning system |
| CN113677158A (en) * | 2021-08-20 | 2021-11-19 | 江苏中科新源半导体科技有限公司 | Semiconductor thermal reactor precise temperature control system for ships |
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