CN112524721A - Novel passive energy storage type air conditioning system - Google Patents
Novel passive energy storage type air conditioning system Download PDFInfo
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- CN112524721A CN112524721A CN202011513639.1A CN202011513639A CN112524721A CN 112524721 A CN112524721 A CN 112524721A CN 202011513639 A CN202011513639 A CN 202011513639A CN 112524721 A CN112524721 A CN 112524721A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 30
- 238000004146 energy storage Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 239
- 238000005057 refrigeration Methods 0.000 claims abstract description 81
- 230000005855 radiation Effects 0.000 claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000005192 partition Methods 0.000 claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims description 16
- 239000000498 cooling water Substances 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000002310 reflectometry Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 239000013589 supplement Substances 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—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 cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
- F25B23/003—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect using selective radiation effect
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Other Air-Conditioning Systems (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a novel passive energy storage type air conditioning system which comprises a thermosyphon refrigeration module, a temperature partition water tank, a tail end device, a ground source heat pump unit, a ground heat exchanger, a water tank heat exchange coil, a water pump, a float valve liquid level switch, a valve and the like. The invention combines the radiation refrigeration technology with the traditional air conditioning technology, can provide a free cold source for buildings at daytime and night, can reduce the cold accumulation loss under the action of the temperature-partition water tank, plays the roles of saving energy and reducing the energy consumption of the buildings, and can supply heat for the buildings in the heating season so as to meet the annual requirements of the buildings.
Description
Technical Field
The invention relates to a novel passive energy storage type air conditioning system, and belongs to the technical field of passive energy utilization.
Background
The air conditioning technology is developed rapidly at the present stage, the air conditioning system becomes the standard configuration of a modern building, the air conditioning system can be matched with different functions according to the requirements of different buildings, and the large use of the air conditioner also causes the large consumption of energy. The power consumption of the air conditioning system accounts for a large proportion of the total power consumption of the whole building, and various energy-saving methods of the air conditioning system have been studied so as to reduce the energy consumption of the air conditioning system. Radiation refrigeration has gained much attention in recent years as a passive refrigeration method. All objects can emit radiation, the radiation can be used for heat exchange between the objects, the outer space can be regarded as a low-temperature heat source with absolute zero temperature, and if one object and the outer space are subjected to radiation heat exchange, the heat can be continuously transmitted to the outer space, so that the refrigerating effect is achieved. The emissivity of the newly proposed radiation refrigeration film in a wave band of 8-13um is greater than 0.90, and the reflectivity in a wave band of 0.25-3um is greater than 0.90, so that radiation heat exchange with the outer space can be better realized, and a better refrigeration effect can be achieved even in the daytime, and if the radiation refrigeration film is applied to an air conditioning system, the energy consumption of a building can be greatly saved.
Prior patent CN211451236U discloses a novel passive air conditioning system, which performs radiation heat exchange with outer space through a radiation refrigeration film, and further reduces the temperature of water, and circulates cold water to a water tank for storage through the action of a pump, and can deliver cold water to a terminal device through the action of the pump when a user end is in use. Although the system can obtain cold energy through passive refrigeration and reduce the energy consumption of the air conditioning system, the energy consumption of a pump in the system is inevitable. Patent CN210568953U discloses a novel split air conditioner, which utilizes radiation refrigeration film to prepare cold, because the radiation refrigeration capability of the existing material is lower, it is often necessary to use with cold storage water tank to achieve the purpose of flexible use of radiation refrigeration capacity. However, the existing cold storage water tank is generally a common water tank, and for a passive radiation refrigeration system with low refrigeration power, the time required for cold energy to be stored in the water tank is long, so that a temperature stratification phenomenon occurs inside the common water tank, namely, water with low temperature is at the lower part of the water tank, and water with high temperature is at the upper part of the water tank. However, with the structure, when the water tank works, the convection of the water inside the water tank breaks the temperature stratification, so that the water layers with high temperature and low temperature are mixed, the loss of cold energy is caused, and the full utilization of the cold energy is not facilitated.
In order to solve the problems, the invention discloses a novel passive energy storage type air conditioning system, the system utilizes the provided thermosiphon refrigeration module, the module can transmit the cold energy obtained by radiation refrigeration to a thermosiphon, the temperature of water in the thermosiphon is reduced and the density is increased, further, under the condition that a pump is not needed, the cold water prepared by the radiation refrigeration directly flows through the density difference, and then the cold energy is stored in a water tank to be supplied to a room needing cold supply, so that the power consumption of the pump is saved. Meanwhile, the invention also discloses a temperature partition water tank, the water tank can separate the refrigerating end from the user end, so that the work of the refrigerating end and the user end is not interfered with each other, and a water source required by the working of the refrigerating end and a water source required by the working of the user end come from different cavities, so that the water in the water tank is not disturbed with each other during circulation. This water tank can also realize the subregion of temperature, and the lower water of temperature can be stored in the cavity that is close from the user to user's utilization cold volume that can be abundant when using reduces the loss of cold volume.
Disclosure of Invention
The invention discloses a novel passive energy storage type air conditioning system, which aims to solve the problem that the energy conservation of the system is influenced by the power consumption of a pump when a passive radiation refrigeration system operates; the second purpose of the invention is to solve the problem of cold loss caused by uneven temperature when the cold storage water tank stores cold.
In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:
the invention discloses a novel passive energy storage type air conditioning system, which is characterized by comprising the following components: the system comprises a temperature-zone water tank, a thermosiphon refrigeration module, a tail end device, a ground source heat pump unit, a ground heat exchanger, a water tank heat exchange coil, a first water pump, a second water pump, a communicating valve, a float valve liquid level switch, an exhaust valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve, a ninth valve, a tenth valve, an eleventh valve, a twelfth valve and a thirteenth valve; the purposes of cooling and heating are achieved by opening and closing each valve and starting and stopping the radiation refrigeration and the ground source heat pump, and the opening and closing of each valve can be completed in an automatic control mode.
As a preferred example, the thermosiphon refrigeration module includes a radiation refrigeration film, a water inlet pipe, a water outlet pipe and a thermosiphon.
As a preferred example, the temperature-partitioned water tank comprises three cavities a, b and c, a float valve liquid level switch and an exhaust valve are arranged above the cavity a, a cold water supply pipe and a liquid level control pipe are arranged inside the cavity b, a water tank heat exchange coil is arranged inside the cavity c, the cavity a is communicated with the cavity b through the cold water supply pipe, the upper part of the cold water supply pipe is connected with the lower part of a pressure difference compensation pipe, the upper part of the pressure difference compensation pipe penetrates through the cavity b and the cavity a to be communicated with the atmosphere, the cavity b is communicated with the upper part of the cavity c through the liquid level control pipe, the cavity b is communicated with the bottom of the cavity c through a communication pipe, a communication valve is arranged on the communication pipe, an opening of the cold water supply pipe in the cavity b faces downwards, the opening height of the liquid level control pipe in the cavity b is higher than the opening height of the cold water supply pipe in the cavity b, the liquid level control, the height of the opening is the height of the working water level required in the cavity c, and the height of the float valve liquid level switch is set to be the water level height which is required to be controlled during normal working of the cavity a in the water tank according to the temperature division.
As a preferred example, the ground source heat pump unit includes a heat source side and a use side.
As a preferred example, the novel passive energy storage type air conditioning system is characterized in that the connection mode among the components is as follows:
a water outlet pipe in the thermosiphon refrigeration module is connected with an input end of a second pipeline, an output end of the second pipeline is connected with a first input end of a temperature partition water tank, a first output end of the temperature partition water tank is connected with an input end of a first pipeline, an output end of the first pipeline is connected with a water inlet pipe in the thermosiphon refrigeration module, a twelfth valve is arranged in the first pipeline, and a thirteenth valve is arranged in the second pipeline;
the second output end of the temperature-division water tank is connected with the input end of a fourth pipeline, the output end of the fourth pipeline is connected with the first input end of a sixth pipeline, the output end of the sixth pipeline is connected with the input end of an end device, the output end of the end device is connected with the input end of a fifth pipeline, the first output end of the fifth pipeline is connected with the first input end of a third pipeline, the output end of the third pipeline is connected with the second input end of the temperature-division water tank, the second output end of the fifth pipeline is connected with the input end of a seventh pipeline, the output end of the seventh pipeline is connected with the input end of the use side of the ground source heat pump unit, the output end of the use side is connected with the input end of an eighth pipeline, the output end of the eighth pipeline is connected with the second input end of the sixth pipeline, a fourth valve is arranged in the third pipeline, a fifth valve is arranged in the fourth pipeline, a sixth valve is arranged in the eighth pipeline, and a seventh valve, the second water pump is arranged in the seventh pipeline;
the output end of a water tank heat exchange coil in the temperature-dividing water tank is connected with the input end of a twelfth pipeline, the output end of the twelfth pipeline is connected with the first input end of a tenth pipeline, the output end of the tenth pipeline is connected with the input end of the buried pipe heat exchanger, the output end of the buried pipe heat exchanger is connected with the input end of a ninth pipeline, the first output end of the ninth pipeline is connected with the input end of an eleventh pipeline, the output end of the eleventh pipeline is connected with the input end of the water tank heat exchange coil in the temperature-dividing water tank, the second output end of the ninth pipeline is connected with the input end of a thirteenth pipeline, the output end of the thirteenth pipeline is connected with the input end of the heat source side in the ground source heat pump unit, the output end of the heat source side is connected with the input end of a fourteenth pipeline, the output end of the fourteenth pipeline is connected with the second input end of the tenth, the ninth valve is in the twelfth pipeline, the tenth valve is in the thirteenth pipeline, the eleventh valve is in the fourteenth pipeline, and the first water pump is in the ninth pipeline;
the float valve liquid level switch in the temperature partition water tank is connected with the water replenishing pipe, and the exhaust valve is arranged at the upper part of the temperature partition water tank and communicated with the atmosphere.
As a preferred example, the surface of the thermosiphon refrigeration module is covered with a radiation refrigeration film facing the sky, the water inlet pipe is vertically connected with the input ends of n thermosiphon pipes, n is a positive integer greater than or equal to 1, the specific numerical value of n is determined according to the refrigeration power of the thermosiphon refrigeration module, the output ends of the thermosiphon pipes are vertically connected with the water outlet pipe, the water inlet pipe, the water outlet pipe and the n thermosiphon pipes are all placed in parallel with the radiation refrigeration film, the included angle between the water inlet pipe and the water outlet pipe and the horizontal plane is between 5 degrees and 90 degrees, and the input ends of;
the thermosiphon refrigeration module can set up 1 or more according to user's demand, and connect in parallel between first pipeline output and second pipeline input.
As a preferred example, the radiation refrigeration film can be one of a metamaterial film with spectral selectivity, a nano-photoexcitation selective emission material, a radiation refrigeration coating or paint; the emissivity of the radiation refrigeration film in a wave band of 8-13um is larger than 0.90, and the reflectivity of the radiation refrigeration film in a wave band of 0.25-3um is larger than 0.90.
Preferably, the end device can be a device such as a cold radiation capillary or a radiation radiator, and the input end of the device in the end device is at least 0.5m lower than the output end of the device;
the end devices can be arranged in number of 1 or more according to the requirements of users and are connected in parallel between the input end of the fifth pipeline and the output end of the sixth pipeline.
As a preferred example, the ground heat exchanger may be one of a vertical U-shaped borehole, a horizontal borehole, a continuous spiral borehole;
the ground heat exchanger can be used alone, and a plurality of ground heat exchangers can also be connected in parallel or in series for use.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the device combines a radiation refrigeration technology, a cold accumulation technology and a traditional air conditioning technology, carries out cold supply and heat supply according to the requirements of users, meets the cold and heat requirements in different seasons, reduces the energy consumption of an air conditioning system, saves part of energy used by a pump and saves energy; the device can utilize natural energy to supply cold to the building under the condition of not consuming other energy, thereby not only saving energy and reducing the energy consumption of the building, but also conforming to the energy-saving concept of green buildings; the device has utilized novel cold water storage tank that has the temperature subregion function, has not only reduced the loss of cold volume in the water tank, when the work of radiation refrigeration side, does not influence the use that supplies the cold side moreover yet.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of a radiant cooling module water connection.
Reference numbers in fig. 1 and 2: the system comprises a temperature partition water tank 1, a cold water supply pipe 101, a liquid level control pipe 102, a pressure difference compensation pipe 103, a communication pipe 104, a thermosiphon refrigeration module 2, a radiation refrigeration film 201, a water inlet pipe 202, a water outlet pipe 203, a thermosiphon pipe 204, a terminal device 3, a ground source heat pump unit 4, a heat source side 401, a use side 402, a buried pipe heat exchanger 5, a water tank heat exchange coil 6, a first water pump 701, a second water pump 702, a communication valve 801, a float valve liquid level switch 802, an exhaust valve 803, a fourth valve 804, a fifth valve 805, a sixth valve 806, a seventh valve 807, an eighth valve 808, a ninth valve 809, a tenth valve 810, an eleventh valve 811, a twelfth valve 812, a thirteenth valve 813, a first pipeline 901, a second pipeline 902, a third pipeline 903, a fourth pipeline 904, a fifth pipeline 905, a sixth pipeline 906, a seventh pipeline 907, an eighth pipeline 908, a ninth pipeline 909, a tenth pipeline 910, a fourth pipeline 910, a pressure difference compensation, An eleventh pipeline 911, a twelfth pipeline 912, a thirteenth pipeline 913, a fourteenth pipeline 914 and a water replenishing pipe 915.
Detailed description of the invention
The technical solution of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a novel passive energy storage type air conditioning system according to an embodiment of the present invention is characterized in that the system includes: the system comprises a temperature zone water tank 1, a thermosiphon refrigeration module 2, a terminal device 3, a ground source heat pump unit 4, a ground heat exchanger 5, a water tank heat exchange coil 6, a first water pump 701, a second water pump 702, a communicating valve 801, a ball float valve liquid level switch 802, an exhaust valve 803, a fourth valve 804, a fifth valve 805, a sixth valve 806, a seventh valve 807, an eighth valve 808, a ninth valve 809, a tenth valve 810, an eleventh valve 811, a twelfth valve 812 and a thirteenth valve 813;
the thermosiphon refrigerating module 2 comprises a radiation refrigerating film 201, a water inlet pipe 202, a water outlet pipe 203 and a thermosiphon pipe 204;
the temperature-division water tank 1 comprises three cavities a, b and c, a float valve liquid level switch 802 and an exhaust valve 803 are arranged above the cavity a, a cold water supply pipe 101 and a liquid level control pipe 102 are arranged in the cavity b, a water tank heat exchange coil 6 is arranged in the cavity c, the cavity a is communicated with the cavity b through the cold water supply pipe 101, the upper part of the cold water supply pipe 101 is connected with the lower part of a differential pressure compensation pipe 103, the upper part of the differential pressure compensation pipe 103 penetrates through the cavity b and the cavity a to be communicated with the atmosphere, the cavity b is communicated with the upper part of the cavity c through the liquid level control pipe 102, the cavity b is communicated with the bottom of the cavity c through a communication pipe 104, a communication valve 801 is arranged on the communication pipe 104, the opening of the cold water supply pipe 101 in the cavity b faces downwards, the opening height of the liquid level control pipe 102 in the cavity b is higher than the opening height of the cold water supply pipe 102, the liquid level control pipe 102 is opened downwards in the cavity b, the height of the opening is the height of the working water level required in the cavity c, and the height of the float valve liquid level switch 802 is set to be the height of the water level required to be controlled during normal working according to the cavity a in the temperature partition water tank 1;
the ground source heat pump unit 4 comprises a heat source side 401 and a use side 402;
the novel passive energy storage type air conditioning system is characterized in that the connection mode among all components is as follows:
the water outlet pipe 203 in the thermosiphon refrigeration module 2 is connected with the input end of a second pipeline 902, the output end of the second pipeline 902 is connected with the first input end of the temperature-partition water tank 1, the first output end of the temperature-partition water tank 1 is connected with the input end of a first pipeline 901, the output end of the first pipeline 901 is connected with the water inlet pipe 202 in the thermosiphon refrigeration module 2, a twelfth valve 812 is in the first pipeline 901, and a thirteenth valve 813 is in the second pipeline 902;
the second output end of the temperature-partitioned water tank 1 is connected with the input end of a fourth pipeline 904, the output end of the fourth pipeline 904 is connected with the first input end of a sixth pipeline 906, the output end of the sixth pipeline 906 is connected with the input end of an end device 3, the output end of the end device 3 is connected with the input end of a fifth pipeline 905, the first output end of the fifth pipeline 905 is connected with the first input end of a third pipeline 903, the output end of the third pipeline is connected with the second input end of the temperature-partitioned water tank 1, the second output end of the fifth pipeline 905 is connected with the input end of a seventh pipeline 907, the output end of the seventh pipeline 907 is connected with the input end of a use side 402 in the ground source heat pump unit 4, the output end of the use side 402 is connected with the input end of an eighth pipeline 908, the output end of the eighth pipeline 908 is connected with the second input end of the sixth pipeline 906, a fourth valve 804 is in the third pipeline 903, and a fifth valve 805 is in the fourth pipeline 904, sixth valve 806 is in eighth conduit 908, seventh valve 807 is in seventh conduit 907, second water pump 702 is in seventh conduit 907;
the output end of the water tank heat exchange coil 6 in the temperature-partitioned water tank 1 is connected with the input end of a twelfth pipeline 912, the output end of the twelfth pipeline 912 is connected with the first input end of a tenth pipeline 910, the output end of the tenth pipeline 910 is connected with the input end of the buried pipe heat exchanger 5, the output end of the buried pipe heat exchanger 5 is connected with the input end of a ninth pipeline 909, the first output end of the ninth pipeline 909 is connected with the input end of an eleventh pipeline 911, the output end of the eleventh pipeline 911 is connected with the input end of the water tank heat exchange coil 6 in the temperature-partitioned water tank 1, the second output end of the ninth pipeline 909 is connected with the input end of a thirteenth pipeline 913, the output end of the thirteenth pipeline 913 is connected with the input end of the heat source side 401 in the ground source heat pump unit 4, the output end of the heat source side 401 is connected with the input end of a fourteenth pipeline 914, the output end of the fourteenth pipeline 914 is connected with, an eighth valve 808 in an eleventh conduit 911, a ninth valve 809 in a twelfth conduit 912, a tenth valve 810 in a thirteenth conduit 913, an eleventh valve 811 in a fourteenth conduit 914, a first water pump 701 in a ninth conduit 909;
a float valve liquid level switch 802 in the temperature zone water tank 1 is connected with a water replenishing pipe 915, and an exhaust valve 803 is arranged at the upper part of the temperature zone water tank 1 and communicated with the atmosphere;
the surface of the thermosiphon refrigeration module 2 is covered with a radiation refrigeration film 201 facing the sky, the input ends of a water inlet pipe 202 and n thermosiphon pipes 204 are vertically connected, n is a positive integer greater than or equal to 1, the specific numerical value of n is determined according to the refrigeration power of the thermosiphon refrigeration module 2, the output ends of the thermosiphon pipes 204 are vertically connected with a water outlet pipe 203, the water inlet pipe 202, the water outlet pipe 203 and the n thermosiphon pipes 204 are all placed in parallel with the radiation refrigeration film 201, the included angle between the water inlet pipe 202, the water outlet pipe 203 and the horizontal plane is between 5 degrees and 90 degrees, and the input ends of the;
the number of the thermosiphon refrigeration modules 2 can be 1 or more according to the user requirement, and the thermosiphon refrigeration modules are connected in parallel between the output end of the first pipeline 901 and the input end of the second pipeline 902;
the radiation refrigeration film 201 can be one of a metamaterial film with spectral selectivity, a nano-photoexcitation selective emission material, a radiation refrigeration coating or paint;
the emissivity of the radiation refrigeration film 201 in a wave band of 8-13um is greater than 0.90, and the reflectivity in a wave band of 0.25-3um is greater than 0.90;
the end device 3 can be a cold radiation capillary or a radiation radiator, and the input end of the equipment in the end device 3 is at least 0.5m lower than the output end of the equipment;
the end device 3 can be provided with 1 or more than one according to the requirement of a user and is connected in parallel between the input end of the fifth pipeline 905 and the output end of the sixth pipeline 906;
the ground heat exchanger 5 can be one of a vertical U-shaped buried pipe, a horizontal buried pipe and a continuous spiral buried pipe;
the ground heat exchanger 5 can be used alone, or a plurality of ground heat exchangers 5 can be connected in parallel or in series;
the novel passive energy storage type air conditioning system of the embodiment has the following specific working modes in four operation modes:
radiation refrigeration cooling mode:
the communication valve 801, the fourth valve 804, the fifth valve 805, the twelfth valve 812 and the thirteenth valve 813 are opened, the float valve liquid level switch 802 and the exhaust valve 803 work normally, the valves on the other pipelines are kept in a closed state, the other devices are in a closed state, at this time, the radiation refrigeration film 201 performs radiation heat exchange with the outer space to obtain cold temperature reduction, then performs heat exchange with water in the thermosiphon 204 in a heat conduction mode to reduce the temperature of the water, the density of the water is increased after the temperature of the water is reduced, the water flows from the input end to the output end of the thermosiphon 204 under the action of gravity, flows to the bottom of the cavity a in the temperature zone water tank 1 through the second pipeline 902, and the water with higher upper temperature flows into the thermosiphon refrigeration module 2 through the first pipeline 901 and circulates continuously, so that the cold is stored in the cavity a of the temperature zone water tank 1;
when cooling is needed indoors, cold water in the cavity a enters the cavity b through the cold water supply pipe 101, enters the cavity c through the communicating pipe 104, and because the cavity b and the cavity c are both separated from the cavity a, water in the cavity b and the cavity c keeps at a low temperature, enters the terminal device 3 through the fourth pipeline 904 and the sixth pipeline 906 to cool indoors, after the cold water in the terminal device 3 absorbs heat of a room, the temperature rises, the density decreases, and a buoyancy lift force is generated on a low-density fluid due to a density difference caused by the temperature difference, so that the low-density fluid flows from an input end to an output end of the terminal device 3, flows back to the upper part of the cavity a in the temperature partition water tank 1 through the fifth pipeline 905 and the third pipeline 903, and is cooled again by the thermosiphon refrigeration module 2;
the buried pipe heat exchange refrigeration mode is as follows:
the communication valve 801, the eighth valve 808, the ninth valve 809, the fourth valve 804 and the fifth valve 805 are opened, the first water pump 701 is opened, the valves on the other pipelines are kept in a closed state, the other devices are in a closed state, cooling water exchanges heat with soil through the buried pipe heat exchanger 5 to obtain cold energy, enters the water tank heat exchange coil 6 through the ninth pipeline 909 and the eleventh pipeline 911 under the action of the first water pump 701 and exchanges heat with water in the cavity c, so that the water temperature in the cavity c is reduced, and then returns to the buried pipe heat exchanger 5 again through the twelfth pipeline 912 and the tenth pipeline 910 to transfer heat to soil, low-temperature cold water in the cavity c flows into the end device 3 through the fourth pipeline 904 and the sixth pipeline 906 to reduce the temperature indoors, after the low-temperature cold water in the end device 3 absorbs the heat of a room, the temperature is increased, the density is reduced, and a floating lift force is generated on fluid with lower density due to a density difference caused by the temperature difference, the fluid with lower density flows from the input end to the output end of the end device 3, flows into the upper part of the cavity a in the temperature-partitioned water tank 1 through the fifth pipeline 905 and the third pipeline 903, the water at the lower part of the cavity a enters the cavity b through the cold water supply pipe 101 to be used as the water supplement of the cavity c, and when the low-temperature cold water of the cavity c enters the end device 3, the water in the cavity b is supplemented into the cavity c through the communicating pipe 104 to be continuously cooled by the water tank heat exchange coil 6;
a ground source heat pump refrigeration mode:
keeping the sixth valve 806, the seventh valve 807, the tenth valve 810 and the eleventh valve 811 open, closing the valves on the other pipelines, opening the first water pump 701 and the second water pump 702, starting the ground source heat pump unit 4, allowing cooling water in the ground heat exchanger 5 to exchange heat with soil to obtain cold, allowing the cold to enter the ground source heat pump unit 4 through the ninth pipeline 909 and the thirteenth pipeline 913 under the action of the first water pump 701 to cool the heat source side 401, allowing the cooling water to absorb heat in the heat source side 401, increasing the temperature, and returning the cooling water to the ground heat exchanger 5 through the fourteenth pipeline 914 and the tenth pipeline 910;
under the action of the second water pump 702, water in the end device 3 enters the use side 402 of the ground source heat pump unit 4 through the fifth pipeline 905 and the seventh pipeline 907 to obtain cold energy, then the temperature is reduced, and the water returns to the end device 3 through the eighth pipeline 908 and the sixth pipeline 906 to cool the room;
heating mode of the ground source heat pump:
keeping the sixth valve 806, the seventh valve 807, the tenth valve 810 and the eleventh valve 811 open, closing the valves on the rest of the pipelines, opening the first water pump 701 and the second water pump 702, starting the ground source heat pump unit 4, allowing cold water to exchange heat with soil through the buried pipe heat exchanger 5 to obtain heat temperature rise, allowing the cold water to enter the heat source side 401 of the ground source heat pump unit 4 through the ninth pipeline 909 and the thirteenth pipeline 913 under the action of the first water pump 701, allowing the heat source side 401 to absorb heat of the cold water, and allowing the cold water to return to the buried pipe heat exchanger 5 through the fourteenth pipeline 914 and the tenth pipeline 910 after the temperature of the cold water is reduced;
the water in the end device 3 enters the use side 402 of the ground source heat pump unit 4 through a fifth pipeline 905 and a seventh pipeline 907 under the action of the second water pump 702, is heated by the use side 402 to obtain heat, and returns to the end device 3 through an eighth pipeline 908 and a sixth pipeline 906 to supply heat to a room;
the above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A novel passive energy storage type air conditioning system is characterized in that the system comprises: the system comprises a temperature zone water tank (1), a thermosiphon refrigeration module (2), a terminal device (3), a ground source heat pump unit (4), a ground heat exchanger (5), a water tank heat exchange coil (6), a first water pump (701), a second water pump (702), a communication valve (801), a ball float valve liquid level switch (802), an exhaust valve (803), a fourth valve (804), a fifth valve (805), a sixth valve (806), a seventh valve (807), an eighth valve (808), a ninth valve (809), a tenth valve (810), an eleventh valve (811), a twelfth valve (812) and a thirteenth valve (813);
the thermosiphon refrigeration module (2) comprises a radiation refrigeration film (201), a water inlet pipe (202), a water outlet pipe (203) and a thermosiphon (204);
the temperature-division water tank (1) comprises three cavities a, b and c, a float valve liquid level switch (802) and an exhaust valve (803) are arranged above the cavity a, a cold water supply pipe (101) and a liquid level control pipe (102) are arranged inside the cavity b, a water tank heat exchange coil (6) is arranged inside the cavity c, the cavity a is communicated with the cavity b through the cold water supply pipe (101), the upper part of the cold water supply pipe (101) is connected with the lower part of a pressure difference compensation pipe (103), the upper part of the pressure difference compensation pipe (103) penetrates through the cavity b and the cavity a to be communicated with the atmosphere, the cavity b is communicated with the upper part of the cavity c through the liquid level control pipe (102), the cavity b is communicated with the bottom of the cavity c through a communication pipe (104), a communication valve (801) is arranged on the communication pipe (104), the opening of the cold water supply pipe (101) in the cavity b faces downwards, and the opening, the communication position of the differential pressure compensation pipe (103) and the cold water supply pipe (101) is higher than the opening height of the cold water supply pipe (101) in the cavity b, the opening of the liquid level control pipe (102) in the cavity b faces downwards, the height of the opening is the height of the working water level required in the cavity c, and the height of the float valve liquid level switch (802) is set to the water level height which is required to be controlled during normal working according to the cavity a in the temperature partition water tank (1);
the ground source heat pump unit (4) comprises a heat source side (401) and a use side (402);
the novel passive energy storage type air conditioning system is characterized in that the connection mode among all the components is as follows:
a water outlet pipe (203) in the thermosiphon refrigeration module (2) is connected with the input end of a second pipeline (902), the output end of the second pipeline (902) is connected with the first input end of a temperature zone water tank (1), the first output end of the temperature zone water tank (1) is connected with the input end of a first pipeline (901), the output end of the first pipeline (901) is connected with a water inlet pipe (202) in the thermosiphon refrigeration module (2), a twelfth valve (812) is arranged in the first pipeline (901), and a thirteenth valve (813) is arranged in the second pipeline (902);
the second output end of the temperature-zone water tank (1) is connected with the input end of a fourth pipeline (904), the output end of the fourth pipeline (904) is connected with the first input end of a sixth pipeline (906), the output end of the sixth pipeline (906) is connected with the input end of an end device (3), the output end of the end device (3) is connected with the input end of a fifth pipeline (905), the first output end of the fifth pipeline (905) is connected with the first input end of a third pipeline (903), the output end of the third pipeline is connected with the second input end of the temperature-zone water tank (1), the second output end of the fifth pipeline (905) is connected with the input end of a seventh pipeline (907), the output end of the seventh pipeline (907) is connected with the input end of a use side (402) in the ground source heat pump unit (4), the output end of the use side (402) is connected with the input end of an eighth pipeline (908), and the output end of the eighth pipeline (907) is connected with the second input end of the sixth pipeline (906), a fourth valve (804) in the third conduit (903), a fifth valve (805) in the fourth conduit (904), a sixth valve (806) in the eighth conduit (908), a seventh valve (807) in the seventh conduit (907), and a second water pump (702) in the seventh conduit (907);
the output end of a water tank heat exchange coil (6) in the temperature-zone water tank (1) is connected with the input end of a twelfth pipeline (912), the output end of the twelfth pipeline (912) is connected with the first input end of a tenth pipeline (910), the output end of the tenth pipeline (910) is connected with the input end of an underground pipe heat exchanger (5), the output end of the underground pipe heat exchanger (5) is connected with the input end of a ninth pipeline (909), the first output end of the ninth pipeline (909) is connected with the input end of an eleventh pipeline (911), the output end of the eleventh pipeline (911) is connected with the input end of the water tank heat exchange coil (6) in the temperature-zone water tank (1), the second output end of the ninth pipeline (909) is connected with the input end of a thirteenth pipeline (913), the output end of the thirteenth pipeline (913) is connected with the input end of a heat source side (401) in a ground source heat pump unit (4), an output end of the heat source side (401) is connected with an input end of a fourteenth pipeline (914), an output end of the fourteenth pipeline (914) is connected with a second input end of a tenth pipeline (910), an eighth valve (808) is arranged in an eleventh pipeline (911), a ninth valve (809) is arranged in a twelfth pipeline (912), a tenth valve (810) is arranged in a thirteenth pipeline (913), an eleventh valve (811) is arranged in the fourteenth pipeline (914), and a first water pump (701) is arranged in a ninth pipeline (909);
a float valve liquid level switch (802) in the temperature zone water tank (1) is connected with a water replenishing pipe (915), and an exhaust valve (803) is arranged at the upper part of the temperature zone water tank (1) and communicated with the atmosphere.
2. The novel passive energy storage type air conditioning system as claimed in claim 1, wherein the surface of the thermosiphon refrigeration module (2) is covered with a radiating refrigeration film (201) facing the sky, the input ends of the water inlet pipe (202) and n thermosiphon pipes (204) are vertically connected, n is a positive integer greater than or equal to 1, the specific value of n is determined according to the refrigeration power of the thermosiphon refrigeration module (2), the output ends of the thermosiphon pipes (204) are vertically connected with the water outlet pipe (203), the water inlet pipe (202), the water outlet pipe (203) and the n thermosiphon pipes (204) are all arranged in parallel with the radiating refrigeration film (201) and form an angle of 5 degrees to 90 degrees with the horizontal plane, and the input ends of the thermosiphon pipes (204) are higher than the output ends of the thermosiphon pipes (204);
the number of the thermosiphon refrigeration modules (2) can be 1 or more according to the user requirement, and the thermosiphon refrigeration modules are connected in parallel between the output end of the first pipeline (901) and the input end of the second pipeline (902).
3. The new passive energy storage type air conditioning system as claimed in claim 1, wherein the radiation refrigeration film (201) is one of a metamaterial film with spectral selectivity, a nano-laser selective emission material, a radiation refrigeration coating or paint;
the emissivity of the radiation refrigeration film (201) in a wave band of 8-13um is larger than 0.90, and the reflectivity in a wave band of 0.25-3um is larger than 0.90.
4. The new passive energy storage type air conditioning system as claimed in claim 1, wherein the end device (3) can be a device such as a cold radiation capillary tube or a radiation radiator, and the input end of the device in the end device (3) is at least 0.5m lower than the output end of the device;
the end devices (3) can be arranged in number of 1 or more according to the requirements of users and are connected in parallel between the input end of the fifth pipeline (905) and the output end of the sixth pipeline (906).
5. A novel passive stored energy air conditioning system as claimed in claim 1 wherein the ground heat exchanger (5) is one of a vertical U-shaped borehole, a horizontal borehole, a continuous helical borehole;
the ground heat exchanger (5) may be used alone or a plurality of ground heat exchangers (5) may be connected in parallel or in series.
6. The novel passive energy storage type air conditioning system according to claim 1, comprising four operation modes, wherein the operation modes are as follows:
radiation refrigeration cooling mode:
opening a communication valve (801), a fourth valve (804), a fifth valve (805), a twelfth valve (812) and a thirteenth valve (813), enabling a float valve liquid level switch (802) and an exhaust valve (803) to work normally, keeping the valves on other pipelines in a closed state, keeping other equipment in a closed state, enabling a radiation refrigeration film (201) to obtain cold temperature reduction through radiation heat exchange with outer space, then performing heat exchange with water in a thermosiphon (204) in a heat conduction mode to reduce the temperature of the water, enabling the density of the water to increase after the temperature of the water is reduced, enabling the water to flow from an input end to an output end of the thermosiphon (204) under the action of gravity, flowing to the bottom of a cavity a in a temperature partition water tank (1) through a second pipeline (902), enabling the water with higher upper temperature to flow into a thermosiphon refrigeration module (2) through a first pipeline (901), and continuously circulating, so that the cold energy is stored in the cavity a of the temperature partition water tank (1);
when the indoor needs to supply cold, the cold water in the cavity a enters the cavity b through the cold water supply pipe (101), when entering into the cavity c through the communicating pipe (104), because the cavity b and the cavity c are separated from the cavity a, the water in the cavity b and the cavity c can keep lower temperature, thereby entering the end device (3) through the fourth pipeline (904) and the sixth pipeline (906) to cool the indoor, after the cold water in the end device (3) absorbs the heat of the room, the temperature is increased, the density is reduced, the density difference caused by the temperature difference generates buoyancy lift force to the fluid with lower density, so that the fluid with lower density flows from the input end to the output end of the tail end device (3), the refrigerant flows back to the upper part of the cavity a in the temperature partition water tank (1) through a fifth pipeline (905) and a third pipeline (903) and is cooled by the thermosiphon refrigeration module (2) again;
the buried pipe heat exchange refrigeration mode is as follows:
opening the communicating valve (801), the eighth valve (808), the ninth valve (809), the fourth valve (804) and the fifth valve (805), starting the first water pump (701), keeping the valves on the rest pipelines in a closed state, keeping the rest equipment in a closed state, exchanging heat between cooling water and soil through the buried pipe heat exchanger (5) to obtain cold, entering the water tank heat exchange coil (6) through the ninth pipeline (909) and the eleventh pipeline (911) under the action of the first water pump (701), exchanging heat with water in the cavity c to reduce the water temperature in the cavity c, returning the cooling water to the buried pipe heat exchanger (5) through the twelfth pipeline (912) and the tenth pipeline (910) again to transfer heat to the soil, allowing low-temperature cold water in the cavity c to flow into the terminal device (3) through the fourth pipeline (904) and the sixth pipeline (906) to cool the indoor, and allowing the low temperature in the terminal device (3) to absorb heat of a room, the temperature is increased, the density is reduced, and the density difference caused by the temperature difference generates a buoyancy lift force on the fluid with lower density, so that the fluid with lower density flows from the input end to the output end of the end device (3) and flows into the upper part of a cavity a in the temperature partition water tank (1) through a fifth pipeline (905) and a third pipeline (903), water at the lower part of the cavity a enters a cavity b through a cold water supply pipe (101) to be used as water supplement of the cavity c, and when the low-temperature cold water of the cavity c enters the end device (3), the water in the cavity b is supplemented into the cavity c through a communicating pipe (104) and is continuously cooled by a water tank heat exchange coil (6);
a ground source heat pump refrigeration mode:
keeping a sixth valve (806), a seventh valve (807), a tenth valve (810) and an eleventh valve (811) open, closing valves on other pipelines, opening a first water pump (701) and a second water pump (702), starting a ground source heat pump unit (4), enabling cooling water in the buried pipe heat exchanger (5) to enter the ground source heat pump unit (4) through a ninth pipeline (909) and a thirteenth pipeline (913) under the action of the first water pump (701) to cool the heat source side (401) after heat exchange with soil to obtain cold, enabling the cooling water to absorb heat in the heat source side (401), then enabling the temperature to rise, and enabling the cooling water to return to the buried pipe heat exchanger (5) through a fourteenth pipeline (914) and a tenth pipeline (910);
the water in the terminal device (3) enters a use side (402) in the ground source heat pump unit (4) through a fifth pipeline (905) and a seventh pipeline (907) under the action of a second water pump (702) to obtain cold energy, then the temperature is reduced, and the water returns to the terminal device (3) through an eighth pipeline (908) and a sixth pipeline (906) to cool the room;
heating mode of the ground source heat pump:
keeping a sixth valve (806), a seventh valve (807), a tenth valve (810) and an eleventh valve (811) open, closing valves on other pipelines, opening a first water pump (701) and a second water pump (702), starting a ground source heat pump unit (4), enabling cold water to exchange heat with soil through a buried pipe heat exchanger (5) to obtain heat temperature rise, enabling the cold water to enter a heat source side (401) of the ground source heat pump unit (4) through a ninth pipeline (909) and a thirteenth pipeline (913) under the action of the first water pump (701), enabling the heat source side (401) to absorb heat of the cold water, enabling the cold water to return to the buried pipe heat exchanger (5) through a fourteenth pipeline (914) and a tenth pipeline (910) after the temperature of the cold water is reduced;
water in the end device (3) enters a use side (402) of the ground source heat pump unit (4) through a fifth pipeline (905) and a seventh pipeline (907) under the action of a second water pump (702), is heated by the use side (402) to obtain heat, and returns to the end device (3) through an eighth pipeline (908) and a sixth pipeline (906) to supply heat to a room;
the radiation refrigeration and cold supply mode, the buried pipe heat exchange refrigeration mode, the ground source heat pump refrigeration mode and the ground source heat pump heating mode can be operated independently, and various combinations can be adopted for operation.
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| CN110836430A (en) * | 2019-12-17 | 2020-02-25 | 南京工业大学 | Novel passive air conditioning system and energy storage and release method thereof |
| CN211625550U (en) * | 2019-12-17 | 2020-10-02 | 南京工业大学 | Air conditioning system with novel supercooling device |
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| CN201177413Y (en) * | 2008-03-11 | 2009-01-07 | 东华大学 | Small-sized solar energy absorption refrigeration system heat siphon pump |
| KR20190101870A (en) * | 2018-02-23 | 2019-09-02 | 고려대학교 산학협력단 | Natural radiative cooling system |
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