CN107436055B - Solar cross-season energy storage triple supply system - Google Patents
Solar cross-season energy storage triple supply system Download PDFInfo
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- CN107436055B CN107436055B CN201710508393.0A CN201710508393A CN107436055B CN 107436055 B CN107436055 B CN 107436055B CN 201710508393 A CN201710508393 A CN 201710508393A CN 107436055 B CN107436055 B CN 107436055B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 66
- 239000011148 porous material Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002689 soil Substances 0.000 claims abstract description 16
- 238000001704 evaporation Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 16
- 239000007787 solid Substances 0.000 claims description 16
- 230000008020 evaporation Effects 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 11
- 239000011232 storage material Substances 0.000 claims description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 17
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005338 heat storage Methods 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 12
- 239000012071 phase Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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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
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
-
- 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
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/24—Storage receiver heat
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Central Heating Systems (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses a solar energy cross-season energy storage triple supply system, which comprises at least one group of heat pump units, at least one group of porous material phase-change energy storage columns, at least one group of heat superconducting tube row type vacuum heat collectors, pipeline ball valves and a circulating pump, wherein the heat pump units are arranged on the heat pump units; the heat pump unit comprises an evaporator and a condenser; the output pipeline and the port of the input pipeline of the porous material phase-change energy storage column are connected with the inlet and the outlet of the evaporator of the corresponding heat pump unit, and the output pipeline is provided with a circulating pump; the heat superconducting tube row type vacuum heat collector is connected with the output pipeline in series, and a pipeline ball valve is arranged at the connection part; the condenser of the heat pump unit is correspondingly connected with a circulating water pipeline in the building. The system utilizes the combination technology of solar heat collection, ground source soil heat storage and heat pump units to realize the heating-refrigerating-heat supply triple supply of urban buildings, refrigerating in summer and heating/hot water supply in winter so as to reduce the energy consumption index of the buildings and fully realize the green zero-carbon requirements of solar heat collection and cross-season energy storage.
Description
Technical Field
The invention belongs to the technical field of energy, and particularly relates to a solar energy cross-season energy storage triple supply system which is widely applied to the fields of solar energy storage balance utilization, heating, heat supply, refrigeration, air conditioning and the like of green buildings, facility agriculture and animal husbandry greenhouses, entertainment facilities and the like.
Background
In recent years, with the development of solar energy industry and the requirement of building energy conservation, urban development and the continuous improvement of living standard of people, solar energy and building integration and all-weather heat supply become important issues of solar energy heat utilization in China. The solar energy and building integrated product is used as building component to make the solar energy and the high temperature products combined organically, so as to meet the aesthetic requirement of building, and to utilize new energy sources such as solar energy and renewable energy sources as much as possible to replace conventional energy sources, so as to reduce the dependence of building energy consumption on conventional energy sources, reduce the proportion of building energy consumption to total energy consumption in China, and improve the utilization rate of conventional energy sources.
The region of China is wide, the sunshine time of the year is more than 2000h, and the region accounts for about 2/3 of the national area of China, and is in a region which is more favorable for utilizing solar energy. Meanwhile, the geothermal resource at the surface of the earth is used as a better cold and heat source, the surface shallow layer is a huge heat superconducting tube row type vacuum heat collector, and 47% of solar energy is absorbed by the surface, so that the surface shallow layer contains a great amount of inexhaustible energy which exceeds 500 times of the annual energy utilization of human beings, is not limited by regional resources, and is ubiquitous. The earth can become the most easily utilized clean and renewable energy source due to the characteristics of almost infinite and constant duration.
Solar energy and geothermal energy are inexhaustible clean natural energy sources, and have the characteristics of sustainability, no pollution, large resource quantity, wide distribution and the like. Various solar energy and geothermal energy utilization devices, including solar water heater, ground source heat pump, etc., have been developed, which have good social and environmental benefits, but suffer from problems such as: solar heating is adopted, so that the heat supply load is insufficient due to the fact that the lighting area is limited, and meanwhile, heat cannot be utilized in non-heating seasons, so that a large amount of energy is wasted; by adopting geothermal energy for heating, the soil temperature is reduced due to no heat supplement or insufficient heat supplement, and the heat supply load is insufficient.
How to use a system to simultaneously utilize solar energy and geothermal energy to realize the optimal matching of two heat sources and simultaneously meet the requirements of heating, refrigerating and preparing domestic hot water of a building is a problem to be solved by people. At present, with the wide application of solar heat collection, ground source heat and other technologies, urban environment is effectively improved, fossil energy consumption is reduced, and the technology still has the problems of unstable heat, discontinuous heat and the like. Therefore, research and development of a system combining a solar medium-high temperature heat collection device, a cross-season energy storage device and heat pump equipment is particularly important in green energy-saving city application.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a solar energy cross-season energy storage triple supply system, which utilizes the combination technology of solar heat collection, ground source soil heat storage and heat pump units to realize the heating-refrigerating-heat supply triple supply of urban buildings, refrigerating in summer and heating/hot water supply in winter so as to reduce the energy consumption index of the buildings and fully realize the green zero-carbon requirements of solar heat collection and cross-season energy storage.
The technical scheme adopted for solving the technical problems is as follows:
the solar energy cross-season energy storage triple supply system comprises at least one group of heat pump units, at least one group of porous material phase-change energy storage columns, at least one group of heat superconducting tube row type vacuum heat collectors, pipeline ball valves and a circulating pump; the heat pump unit comprises an evaporator and a condenser, the evaporator of the heat pump unit exchanges heat with the refrigerant, the heat pump unit compresses the refrigerant to apply work by consuming a small amount of electricity, the refrigerant is gasified at a high temperature, cold water in a circulating pipe in the condenser is circulated to absorb heat in the refrigerant, water in the circulating pipe is heated, and the heated hot water is conveyed into a building under the action of a circulating water pump to provide hot water or heating; the output pipeline and the input pipeline of the porous material phase-change energy storage column are connected with the inlet and the outlet of the evaporator of the corresponding heat pump unit, the porous material phase-change energy storage column absorbs heat stored in the solid phase-change material and the ground source soil, working medium liquid is filled in the output pipeline and the input pipeline, the heat is carried out by the working medium liquid, a circulating pump is arranged on the output pipeline, and the circulating pump provides power for the flow of the working medium liquid; the heat superconducting tube exhaust type vacuum heat collector is connected with the output pipeline in series, the heat superconducting tube exhaust type vacuum heat collector collects heat energy converted by solar energy, the heat energy is carried out by working medium liquid, a pipeline ball valve is arranged at the joint, and the connection and disconnection of the output pipeline and the heat superconducting tube exhaust type vacuum heat collector are controlled by the pipeline ball valve; the condenser of the heat pump unit is correspondingly connected with a circulating water pipeline in the building.
Preferably, the heat superconducting tube row type vacuum heat collector comprises an outer tube, an inner tube, an evaporation tube, a vacuum glass heat collector and a sealing plug; the inner tube is concentrically inserted into the outer tube, and two ends of the outer tube are welded with the outer wall of the inner tube in a sealing way to form a concentric sleeve heat exchange structure; the evaporation pipes are arranged in parallel, one end of each evaporation pipe is closed, and the other end of each evaporation pipe is vertically welded on the horizontal outer pipe according to a certain interval; a sealed tube bank cavity which is communicated with each other is formed between the plurality of evaporating tubes and the concentric sleeve jackets, and the tube bank cavity is filled with working medium in a vacuum state; each evaporating pipe penetrates through the central hole of the sealing plug and is inserted into the vacuum glass heat collecting pipe, and the opening of the vacuum glass heat collecting pipe is sealed by the sealing plug.
Preferably, the porous material phase-change energy storage column comprises a U-shaped heat exchange tube, a solid porous material and a phase-change energy storage material, wherein the porous material phase-change energy storage column is foamed around the U-shaped heat exchange tube through the solid porous material, and the phase-change energy storage material is filled in the gaps of the solid porous material; the porous material phase-change energy storage column is placed into free ground source soil with the depth of 100-150m from the ground surface, one end of the U-shaped heat exchange tube is connected with an output pipeline, the other end of the U-shaped heat exchange tube is connected with an input pipeline, and working medium liquid is filled in the U-shaped heat exchange tube. Working medium liquid in the U-shaped heat exchange tube in the porous material phase change energy storage column absorbs heat stored in the phase change energy storage material and ground source soil, and is sucked and circulated to an evaporator of the heat pump unit to exchange heat with the refrigerant under the action of the circulating pump.
Preferably, the solid porous material is an iron ore-cement-containing foamed porous material with high thermal conductivity and high content, the porosity is 45-60%, the porosity is high, and the thermal conductivity is good.
Preferably, the working fluid is methanol, ethanol, acetone or R22, and the filled working fluid accounts for 60-90% of the volume in the lumen.
In the invention, in the heating period in winter, the porous material phase-change energy storage column and the ground source soil circularly transmit the stored heat to the heat pump unit through working medium liquid, and the heat pump unit works to provide hot water or heating for a building. And the heat pump unit in summer is switched by an internal reversing valve to perform refrigeration operation, and redundant heat in the building is transmitted to the porous material phase-change energy storage column and the soil, so that the aim of cooling in the building is fulfilled. Meanwhile, sunlight is abundant in summer, the heat superconducting tube exhaust type vacuum heat collector circularly transfers collected heat to the porous material phase-change energy storage column and the soil through working medium liquid in the pipeline, and the heat is stored for use in a heating period in winter, so that heat storage across seasons is realized. And a pipeline ball valve is arranged at the joint of the communication pipeline of the heat superconducting tube row type vacuum heat collector and the output pipeline of the porous material phase-change energy storage column, so that the heat superconducting tube row type vacuum heat collector and the porous material phase-change energy storage column can be combined or disconnected.
Compared with other heat pump systems, the invention has the advantages that: the system is efficient, energy-saving, stable and reliable in operation, high in thermal efficiency, low in maintenance cost and long in service life.
The invention has the advantages that:
(1) The invention integrates three processes of solar heat collection, ground source cross-season storage and release, high-temperature heat supply and refrigeration, realizes different-season storage/heat release processes, and achieves the effect of supplying water, heating and refrigerating in different seasons in a building, thereby solving the problems of discontinuity, instability, surplus energy in summer and abandonment of utilization in the utilization process of solar energy and insufficient energy saving in the coldest season in winter;
(2) The system of the invention combines the porous material phase-change energy storage column with the heat superconducting tube row type vacuum heat collector and the heat pump unit, the heat efficiency is improved by about 60% compared with the operation of single equipment, and simultaneously, the system effectively utilizes solar energy and geothermal resources, does not consume fossil energy and has no pollutant emission through heat pump upgrading, thus being a green and environment-friendly technology;
(3) According to the invention, the vacuum glass heat collecting tube heat collecting and the heat superconducting tube row are organically combined by the heat superconducting tube row type vacuum heat collector, the plurality of evaporating tubes share the unique structure of the horizontal sleeve, the concentric sleeve gaps and the evaporating tubes are mutually communicated to form a closed cavity, and the working medium is filled in the cavity, so that the rapid heat exchange between the vacuum glass heat collecting tube and the inner tube working medium liquid is realized, the efficient absorption, the vacuum heat preservation and the ultralow thermal resistance heat transfer are realized, and the total heat efficiency of the device is higher;
(4) According to the invention, the phase-change energy storage column made of the porous material adopts a unique double-U-shaped heat exchange tube vertical cross design, and is filled with the solid porous foaming material and the phase-change energy storage material with high heat conductivity, so that the storage/heat release rate of the phase-change energy storage column made of the porous material is fully improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a side cross-sectional view of a thermal superconducting tube row-type vacuum collector;
FIG. 3 is a longitudinal cross-sectional view of a porous material phase change energy storage column;
fig. 4 is a cross-sectional view of a porous material phase change energy storage column.
Detailed Description
The invention will be further described with reference to the accompanying drawings:
as shown in fig. 1, the solar energy cross-season energy storage triple supply system comprises a heat pump unit 10, a porous material phase-change energy storage column 11, a heat superconducting tube row type vacuum heat collector 12, a pipeline ball valve and a circulating pump 13; the heat pump unit 10 comprises an evaporator 101 and a condenser 102; the ports of the output pipeline 110 and the input pipeline 111 of the porous material phase-change energy storage column 11 are connected with the inlet and the outlet of the evaporator 101 of the corresponding heat pump unit 10, and the output pipeline 110 is provided with a circulating pump 13; the heat superconducting tube row type vacuum heat collector 12 is connected with the output pipeline 110 in series, and pipeline ball valves are arranged at the connection positions and comprise a ball valve 14, a ball valve 15 and a ball valve 16; the condenser 102 of the heat pump unit 10 is correspondingly connected with a circulating water pipeline in a building.
As shown in fig. 2, the heat superconducting tube row type vacuum heat collector 12 includes an outer tube 121, an inner tube 122, an evaporation tube 123, a vacuum glass heat collector 124 and a sealing plug 125; the inner tube 122 is concentrically inserted into the outer tube 121, and two ends of the outer tube 121 are welded with the outer wall of the inner tube 122 in a sealing manner to form a concentric sleeve heat exchange structure; the evaporation pipes 123 are provided with a plurality of parallel evaporation pipes, one end of each evaporation pipe 123 is closed, and the other end of each evaporation pipe 123 is vertically welded on the horizontal outer pipe 121 according to a certain interval; a closed tube row cavity which is communicated with each other is formed between the plurality of evaporating tubes 123 and the concentric sleeve jackets; each evaporation tube 123 is inserted into the vacuum glass heat collecting tube 124 through the central hole of the sealing plug 125, and the sealing plug 125 seals the opening of the vacuum glass heat collecting tube 124.
As shown in fig. 3 and fig. 4, the porous material phase-change energy storage column 11 includes a U-shaped heat exchange tube 113, a solid porous material 114 and a phase-change energy storage material 115, where the porous material phase-change energy storage column 11 is foamed around the U-shaped heat exchange tube 113 by the solid porous material 114, and the phase-change energy storage material 115 is filled in the gaps of the solid porous material 114; the porous material phase-change energy storage column 11 is placed in free ground source soil 116 with the depth of 100-150m from the ground surface, one end of the U-shaped heat exchange tube 113 is connected to the output pipeline 110, the other end is connected to the input pipeline 111, and working medium liquid is filled in the U-shaped heat exchange tube 113.
600kW device system design:
1. heat superconducting tube row type vacuum heat collector: the heat collection efficiency is 65-75%, and the heat collection temperature is as follows: <200 ℃.
Specification of:24 branches/head>A vacuum glass heat collecting tube;
the main materials are as follows: an aluminum alloy;
working medium in the cavity of the sealed tube bank: acetone is filled in 60-80%.
2. Porous material phase change energy storage post: solid porous material-phase-change energy storage material-U-shaped heat exchange tube
Diameter: 100mm, length: 100-150m;
solid porous material: high-heat conductivity high-iron ore-cement-containing foaming porous material with 45-60% of porosity;
u-shaped heat exchange tube: 1U or 2U combination, aluminum material;
phase change energy storage material: low-temperature water insoluble chlorinated paraffin, and melting temperature is 28-30 ℃;
heat storage capacity: 180-400kJ/kg;
3. heat pump unit: BSB-L400W/2, heating capacity: 420kW/, 400kW of refrigerating capacity;
technical performance parameters of the system device:
heat supply capability: 600kW of the powder is used for the treatment of the waste heat,
refrigerating capacity: 600kW;
heating temperature: 45-65 DEG C
Air conditioning temperature: 15-24 DEG C
Energy efficiency ratio: 6-8;
energy storage ratio: 30%;
energy storage time: and 6-8 months.
The working process of the invention comprises the following steps: in the heating period in winter, the heat superconducting tube row type vacuum heat collector 12 is less in heat collection, and the ball valves 14 and 15 can be closed, the ball valve 16 can be opened, the heat superconducting tube row type vacuum heat collector 12 is not communicated with the output pipeline 110 of the porous material phase-change energy storage column 11, and only the porous material phase-change energy storage column 11 is combined with the heat pump unit 10 to provide hot water or heating for the interior of a building. The heat pump unit 10 compresses and applies work to the refrigerant by consuming a small amount of electricity, gasifies the refrigerant at high temperature, and circulates cold water in a circulating pipe in the condenser 102 to absorb heat in the refrigerant, so that water in the circulating pipe is heated, and the heated hot water is conveyed into a building to provide hot water or heating under the action of a circulating water pump.
In summer, sunlight is abundant, the pipeline of the heat superconducting tube row type vacuum heat collector 12 is connected into the output pipeline 110 of the porous material phase-change energy storage column 11 by opening the ball valve 14 and the ball valve 15 and closing the ball valve 16, and the heat superconducting tube row type vacuum heat collector 12 transfers the collected heat to the phase-change energy storage material 115 of the porous material phase-change energy storage column 11 and the ground source soil 116 through the fluid of the inner tube 122, so that heat storage is realized. Specifically, sunlight irradiates the heat superconducting tube row type vacuum heat collector 12, the vacuum glass heat collecting tube 124 collects heat energy converted by solar energy, the collected heat gasifies working medium in the evaporating tube 123, the gasified working medium exchanges heat with working medium liquid circularly flowing in the inner tube 122, the working medium liquid in the inner tube 122 conveys heat into the U-shaped heat exchanging tube 113 through the output pipeline 110 under the action of the circulating pump 13, the U-shaped heat exchanging tube 113 conveys heat into the solid phase change material 114 through the solid porous material 114 on the surface and further conveys the heat to the ground source soil 116, so that heat in summer is reversely flowed into the soil for storage, and the heat collecting tube is used in winter. Meanwhile, in order to reduce the temperature in the building in summer, the heat pump unit 10 performs refrigeration operation, the reversing valve between the evaporator 101 and the condenser 102 is switched, and the compressor in the heat pump unit 10 does work on the refrigerant, so that the refrigerant performs vapor-liquid conversion circulation, and the purpose of refrigeration is achieved. The refrigerating process is that the heat in the building is absorbed by the water in the circulating pipe, the water flows through the evaporator 101 under the action of the circulating water pump and exchanges heat with the refrigerant in the evaporator 101, the heat absorbed by the refrigerant exchanges heat with the working medium liquid in the output pipeline 110 in the condenser 102 through the work of the compressor, and then the absorbed heat is transferred into the phase change energy storage material 115 of the porous material phase change energy storage column 11 and the ground source soil 116 through the circulation of the working medium liquid. The heat pump unit 10 continuously takes out redundant heat from the room by circulating in this way, and the purpose of cooling the room is achieved.
Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present invention and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (5)
1. The solar cross-season energy storage triple supply system is characterized by comprising at least one group of heat pump units, a plurality of groups of porous material phase change energy storage columns, a plurality of groups of heat superconducting tube row type vacuum heat collectors, pipeline ball valves and circulating pumps; the heat pump unit comprises an evaporator and a condenser; the porous material phase-change energy storage columns are connected in parallel through an input pipeline and an output pipeline and then are placed into ground source soil, ports of the output pipeline and the input pipeline of the porous material phase-change energy storage columns are connected with an inlet and an outlet of an evaporator of a corresponding heat pump unit, and a circulating pump is arranged on the output pipeline; the heat superconducting tube row type vacuum heat collectors are connected in series, and the heat superconducting tube row type vacuum heat collectors are connected in series with the output pipeline, and pipeline ball valves are arranged at the connection positions; the condenser of the heat pump unit is correspondingly connected with a circulating water pipeline in a building, the porous material phase-change energy storage column comprises a U-shaped heat exchange tube, a solid porous material and a phase-change energy storage material, the porous material phase-change energy storage column is foamed around the U-shaped heat exchange tube through the solid porous material, and the phase-change energy storage material is filled in the gaps of the solid porous material; one end of the U-shaped heat exchange tube is connected with the output pipeline, the other end is connected with the input pipeline, and working medium liquid is filled in the U-shaped heat exchange tube.
2. The solar cross-season energy storage triple supply system of claim 1, wherein the heat superconducting tube row type vacuum heat collector comprises an outer tube, an inner tube, an evaporation tube, a vacuum glass heat collector and a sealing plug; the inner tube is concentrically inserted into the outer tube, and two ends of the outer tube are welded with the outer wall of the inner tube in a sealing way to form a concentric sleeve heat exchange structure; the evaporation pipes are arranged in parallel, one end of each evaporation pipe is closed, and the other end of each evaporation pipe is vertically welded on the horizontal outer pipe according to a certain interval; a closed tube row cavity which is communicated with each other is formed between the plurality of evaporating tubes and the concentric sleeve jackets; each evaporating pipe penetrates through the central hole of the sealing plug and is inserted into the vacuum glass heat collecting pipe, and the opening of the vacuum glass heat collecting pipe is sealed by the sealing plug.
3. The solar cross-season energy storage triple supply system according to claim 1, wherein the porous material phase change energy storage column is placed in ground source soil with a depth of about 100-150 meters from the ground surface.
4. The solar cross-season energy storage triple co-generation system of claim 3, wherein the solid porous material is a high-thermal conductivity high-iron-ore-cement-containing foamed porous material with a porosity of 45-60%.
5. The solar cross-season energy storage triple co-generation system of claim 3, wherein the working fluid is methanol, ethanol, acetone or R22, and the filled working fluid accounts for 60-90% of the volume in the lumen.
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| CN108534385B (en) * | 2018-04-16 | 2020-08-18 | 武汉科技大学 | Solar energy auxiliary ground source heat pump system |
| CN108916967A (en) * | 2018-07-24 | 2018-11-30 | 甘肃德龙地热科技有限公司 | A kind of system of using mid-deep strata rock hot well heat accumulation |
| CN110173930A (en) * | 2019-05-31 | 2019-08-27 | 赵通 | Pipeline heat-exchange system with monitoring function |
| CN112797829A (en) * | 2021-01-29 | 2021-05-14 | 安徽建筑大学 | double-U-shaped heat-activated building envelope with cross-shaped drill holes and operation control method |
| CN114909704B (en) * | 2022-05-11 | 2024-01-23 | 内蒙古科技大学 | Energy storage system |
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