CN111735218A - Combined system for ultralow-energy-consumption heating and refrigeration of coupled photo-thermal and geothermal heat collector - Google Patents
Combined system for ultralow-energy-consumption heating and refrigeration of coupled photo-thermal and geothermal heat collector Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 55
- 238000005265 energy consumption Methods 0.000 title claims abstract description 24
- 238000005057 refrigeration Methods 0.000 title claims description 18
- 230000005855 radiation Effects 0.000 claims abstract description 61
- 230000008878 coupling Effects 0.000 claims abstract description 16
- 238000010168 coupling process Methods 0.000 claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 230000008929 regeneration Effects 0.000 claims description 14
- 238000011069 regeneration method Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 10
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 238000007791 dehumidification Methods 0.000 abstract description 21
- 238000004378 air conditioning Methods 0.000 abstract description 5
- 230000007704 transition Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000009423 ventilation Methods 0.000 abstract description 2
- 238000005338 heat storage Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 230000000295 complement effect Effects 0.000 description 3
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- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/105—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system pumps combined with multiple way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- 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
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T10/15—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using bent tubes; using tubes assembled with connectors or with return headers
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
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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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0057—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground receiving heat-exchange fluid from a closed circuit in the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/272—Solar heating or cooling
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention relates to an ultra-low energy consumption heating and refrigerating combined system of a coupling photo-thermal collector and a geothermal collector. It has solved prior art design technical problem such as reasonable inadequately. Including ground heat exchanger system, ground source heat pump unit system and the terminal system of building indoor radiation, still include with the solar energy collection system of the terminal system of building indoor radiation, solar energy collection system, ground source heat pump unit system and ground heat pump system parallel connection are on the terminal system of building indoor radiation, solar energy collection system is connected with solution dehumidification air conditioner, just solution dehumidification air conditioner link to each other with the terminal system of building indoor radiation. Has the advantages that: the solar energy and the geothermal energy are fully utilized in winter and summer, transition seasons and intermittent operation periods, the requirements of people on thermal comfort and high air quality are met, meanwhile, the potential in the aspect of energy conservation is fully developed, the ultralow energy consumption of the heating ventilation air-conditioning system is realized, and the comfort is also considered.
Description
Technical Field
The invention belongs to a novel geothermal system for air conditioning by utilizing shallow geothermal energy and a solar heat collector, and particularly relates to an ultra-low energy consumption heating and refrigerating combined system for coupling new photothermal and geothermal energy.
Background
The ground source heat pump technology is a novel energy utilization technology for heating and refrigerating by utilizing shallow layer geothermal energy of 200 meters underground. The core of the system is that low-temperature geothermal energy contained in soil, sandstone and underground water with relatively constant temperature of a shallow underground layer and huge heat storage and cold storage capacity of the soil, the sandstone and the underground water are utilized, heat or cold in the underground soil is transferred by a heat pump technology to be used for indoor air-conditioning refrigeration or heating, and the soil temperature is higher than the indoor environment temperature in winter and lower than the indoor environment temperature in summer, so that the energy utilization efficiency is higher than that of a conventional air-conditioning system. However, the ground source heat pump is limited by the area of the underground soil buried pipe, and for a building with a small well-digging area and a high volume ratio, the single ground source heat pump cannot completely meet the load requirement and needs to supplement other cold and heat sources.
The solar heat collection technology is mainly a technology for converting direct radiation and scattered radiation in solar radiation into medium-low temperature hot water through photo-thermal conversion, collecting and transmitting the medium-low temperature hot water to a heat using terminal, and most of the solar heat collection technology adopts a non-light-gathering heat collection technology for hot water or heating of community residents. However, compared with geothermal energy, the intensity of solar energy is affected by factors such as seasons, places and climates, and is an unstable energy form, and generally needs auxiliary heat storage facilities, and in summer with the maximum intensity, a large amount of heat energy is wasted due to reduction of heat utilization demand of a conventional heat collection system.
In order to solve the problems of the prior art, people have long searched for various solutions, and for example, chinese patent literature discloses a solar-assisted ground source multi-connected heat pump system [ application number: 201911332352.6]: the system comprises a ground buried pipe, a first water pump, a first plate type heat exchanger, a second water pump, a solar water heater, a second plate type heat exchanger, a four-way reversing valve, a compressor, an indoor heat exchanger, an indoor fan and an expansion valve, wherein the ground buried pipe, the first water pump, a secondary refrigerant flow path of the first plate type heat exchanger and a secondary refrigerant flow path of the second plate type heat exchanger are sequentially connected to form a secondary refrigerant loop; a water flow path of the first plate heat exchanger, the second water pump and the solar water heater are sequentially connected to form a water loop; one end of a refrigerant flow path of the second plate heat exchanger is connected with the inlet of the compressor through the four-way reversing valve, and the outlet of the compressor is connected with the refrigerant flow path of the indoor heat exchanger and the expansion valve through the four-way reversing valve and then returns to the other end of the second plate heat exchanger to form a refrigerant loop.
Although the ground source heat pump and the solar heat collection device are integrated with each other to form a complementary technical system form, solar heat energy is limited to be used as the underground temperature compensation of the ground source heat pump and the supplement of indoor terminal load in winter under the heating working condition in winter, the solar energy is only used in transition seasons of winter and spring and autumn, the summer with the maximum energy intensity is not used, and the indoor terminal of the conventional ground source heat pump system is in a fan coil or wind system form, so that the indoor comfort is poor, and the indoor load is larger due to the fact that energy loss is easily caused.
Disclosure of Invention
The invention aims to solve the problems and provides an ultra-low energy consumption heating and refrigerating combined system of a coupling photo-thermal collector and a geothermal collector, wherein a user side adopts a radiation fresh air system and an energy side adopts solar energy and geothermal energy for coupling.
In order to achieve the purpose, the invention adopts the following technical scheme: the ultra-low energy consumption heating and refrigerating combined system of the coupling photo-thermal and geothermal heat collector comprises a buried pipe heat exchange system, wherein the buried pipe heat exchange system is connected with a ground source heat pump unit system, the buried pipe heat exchange system and the ground source heat pump unit system are respectively connected with a building indoor radiation terminal system, and the system is characterized by further comprising a solar heat collection system connected with the building indoor radiation terminal system, the solar heat collection system, the ground source heat pump unit system and the buried pipe heat exchange system are connected to the building indoor radiation terminal system in parallel, the solar heat collection system is connected with a solution dehumidifying air conditioner, and the solution dehumidifying air conditioner is connected with the building indoor radiation terminal system.
Obviously, the invention uses the buried pipe heat exchange system and the heat pump unit system as main parts and the solar heat collection system as auxiliary parts, efficiently utilizes solar photo-thermal energy and shallow geothermal energy to meet the cold and heat energy demand of terminal users of low-carbon community houses and office buildings, and realizes a multi-energy complementary integrated energy supply facility system. Utilize in the comfortable problem of winter cold summer hot area building changes in temperature, form efficient energy source side through light and heat and geothermal energy coupling to and the radiation new trend system, with the cold and hot volume in the nature transmit the experience of user side and experience the impression, when satisfying people to thermal comfort and higher air quality requirement, fully excavate its energy-conserving aspect potentiality.
In the combined system of the ultra-low energy consumption heating and refrigeration of the coupling photo-thermal collector and the geothermal collector, the buried heat exchange system comprises at least one buried heat exchange well, and the buried heat exchange well is connected with the indoor radiation tail end system of the building through a ground source side circulating pump.
In the combined system for ultra-low energy consumption heating and refrigeration of the coupled photo-thermal and geothermal heat collector, the ground source heat pump unit system comprises a ground source heat pump unit connected with an underground heat exchange well through a ground source side circulating pump, and the ground source heat pump unit is respectively connected with a building indoor radiation tail end system and a solution dehumidification air conditioner in parallel through a load side circulating pump.
In the combined system for ultralow-energy-consumption heating and refrigeration of the coupled photo-thermal and geothermal heat collector, the building indoor radiation tail end system comprises a floor radiation heating coil and a ceiling cold radiation coil which are sequentially arranged, the ceiling cold radiation coil is respectively connected with a ground source side circulating pump, a load side circulating pump and a solution dehumidification air conditioner in parallel, and the floor radiation heating coil is respectively connected with a solar heat collection system, the load side circulating pump and the solution dehumidification air conditioner in parallel.
In the ultra-low energy consumption heating and refrigerating combined system of the coupling photo-thermal and geothermal heat collector, the solution dehumidifying air conditioner comprises a solution regeneration box and a fresh air dehumidifying box, the solution regeneration box is connected with the solar heat collecting system, and the fresh air dehumidifying box is connected in parallel between the floor radiation heating coil and the ceiling cold radiation coil.
In the combined system for ultra-low energy consumption heating and refrigeration of the coupling photo-thermal and geothermal heat collector, the solar heat collecting system comprises a solar heat collector, the solar heat collector is connected with a heat storage water tank through a heat collecting circulating pump, and the heat storage water tank is connected with a solution regeneration box and a floor radiant heating coil in parallel through a heat supplying circulating pump.
In the combined system of the ultra-low energy consumption heating and refrigeration of the coupling photo-thermal and geothermal heat collector, a first valve is arranged between the underground heat exchange well and the ground source heat pump unit, and a second valve is arranged between the underground heat exchange well and the suspended ceiling cold radiation coil.
In the combined system of the heating and refrigeration with ultra-low energy consumption of the coupling photo-thermal and geothermal heat collector, a fifth valve, a third valve and a ninth valve are sequentially arranged between the load side circulating pump and the floor radiant heating coil.
In the combined system of the ultra-low energy consumption heating and refrigeration of the coupling photo-thermal and geothermal heat collector, the ceiling cold radiation coil is connected between the fifth valve and the third valve through the fourth valve, and the fresh air dehumidification box is connected between the third valve and the ninth valve through the sixth valve.
In the combined system of the ultra-low energy consumption heating and refrigeration of the coupling photo-thermal and geothermal heat collector, the heat supply circulating pump is connected with an eighth valve, and the solution regeneration box is connected between the heat supply circulating pump and the eighth valve through a seventh valve.
Compared with the prior art, the invention has the advantages that:
1. the problems of overlarge energy consumption and poor comfort of a traditional refrigerating and heating system of a building in a region with cold winter and hot summer are solved, and the unification of ultralow energy consumption and high comfort is realized;
2. the solar energy and the geothermal energy are fully utilized in winter and summer, transition seasons and intermittent operation periods, the requirements of people on thermal comfort and high air quality are met, meanwhile, the potential in the aspect of energy conservation is fully developed, the ultralow energy consumption of the heating ventilation air-conditioning system is realized, and the comfort is also considered.
Drawings
FIG. 1 is a schematic diagram of the present invention;
in the figure, a buried pipe heat exchange system 1, a buried heat exchange well 11, a ground source heat pump unit system 2, a ground source heat pump unit 21, a building indoor radiation tail end system 3, a floor radiation heating coil 31, a ceiling cold radiation coil 32, a solar heat collection system 4, a solar heat collector 41, a heat storage water tank 42, a solution dehumidifying air conditioner 5, a solution regeneration tank 51, a fresh air dehumidifying tank 52, a ground source side circulating pump P1, a load side circulating pump P2, a heat collection circulating pump P3, a heat supply circulating pump P4, a first valve V1, a second valve V2, a third valve V3, a fourth valve V4, a fifth valve V5, a sixth valve V6, a seventh valve V7, an eighth valve V8 and a ninth valve V9.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the ultra-low energy consumption radiation fresh air system of the coupling photo-thermal and geothermal new energy in this embodiment includes a buried pipe heat exchange system 1, the buried pipe heat exchange system 1 is connected to a ground source heat pump unit system 2, the buried pipe heat exchange system 1 and the ground source heat pump unit system 2 are respectively connected to a building indoor radiation end system 3, the system further includes a solar heat collection system 4 connected to the building indoor radiation end system 3, the solar heat collection system 4, the ground source heat pump unit system 2 and the buried pipe heat exchange system 1 are connected to the building indoor radiation end system 3 in parallel, the solar heat collection system 4 is connected to a solution dehumidifying air conditioner 5, and the solution dehumidifying air conditioner 5 is connected to the building indoor radiation end system 3. In the embodiment, the ground heat exchange system 1 and the heat pump unit system 2 are taken as the main parts, the solar heat collection system 4 is taken as the auxiliary part, solar photo-thermal energy and shallow geothermal energy are efficiently utilized to meet the cold and heat energy demand of terminal users of low-carbon community houses and office buildings, and the multi-energy complementary integrated energy supply facility system is realized. Utilize in the comfortable problem of winter cold summer hot area building changes in temperature, form efficient energy source side through light and heat and geothermal energy coupling to and the radiation new trend system, with the cold and hot volume in the nature transmit the experience of user side and experience the impression, when satisfying people to thermal comfort and higher air quality requirement, fully excavate its energy-conserving aspect potentiality.
Specifically, the underground heat exchange system 1 in the embodiment includes at least one underground heat exchange well 11, and the underground heat exchange well 11 is connected with the indoor radiation end system 3 of the building through a ground source side circulating pump P1. The ground source heat pump unit system 2 comprises a ground source heat pump unit 21 connected with the underground heat exchange well 11 through a ground source side circulating pump P1, and the ground source heat pump unit 21 is respectively connected with the indoor radiation tail end system 3 of the building and the solution dehumidifying air conditioner 5 in parallel through a load side circulating pump P2.
Further, the building indoor radiation end system 3 herein includes a floor radiation heating coil 31 and a ceiling cold radiation coil 32, which are sequentially disposed, respectively, and the ceiling cold radiation coil 32 is connected in parallel with the ground source side circulation pump P1, the load side circulation pump P2 and the solution dehumidification air conditioner 5, respectively, and the floor radiation heating coil 31 is connected in parallel with the solar heat collection system 4, the load side circulation pump P2 and the solution dehumidification air conditioner 5, respectively.
In order to improve the comfort of users, the solution dehumidifying air conditioner 5 comprises a solution regenerating tank 51 and a fresh air dehumidifying tank 52, wherein the solution regenerating tank 51 is connected with the solar heat collecting system 4, and the fresh air dehumidifying tank 52 is arranged between the floor radiant heating coil 31 and the ceiling cold radiant coil 32 in parallel.
The solar heat collecting system 4 includes a solar heat collector 41, the solar heat collector 41 is connected to a heat storage water tank 42 through a heat collecting circulation pump P3, and the heat storage water tank 42 is connected in parallel to a solution regeneration tank 51 and a floor radiant heating coil 31 through a heat supply circulation pump P4.
In order to realize the switching of different working conditions, a first valve V1 is arranged between the underground heat exchange well 11 and the ground source heat pump unit 21, and a second valve V2 is arranged between the underground heat exchange well 11 and the ceiling cold radiation coil 32. Wherein, a fifth valve V5, a third valve V3 and a ninth valve V9 are sequentially arranged between the load side circulating pump P2 and the floor radiant heating coil 31. Preferably, the ceiling cold radiation coil 32 is connected between the fifth valve V5 and the third valve V3 through a fourth valve V4, and the fresh air dehumidifying tank 52 is connected between the third valve V3 and the ninth valve V9 through a sixth valve V6. The heat-supplying circulation pump P4 is connected with an eighth valve V8, and the solution regeneration tank 51 is connected between the heat-supplying circulation pump P4 and the eighth valve V8 through a seventh valve V7.
The operation in this embodiment divides into the refrigeration operating mode in summer and the winter heating operating mode, wherein: in the summer refrigeration working condition, under the low-load working condition, the loop formed by the underground heat exchange well 11 and the suspended ceiling cold radiation coil 32 is used for directly refrigerating, under the working condition, the second valve V2 and the ground source heat pump circulating pump P1 are opened, 20-degree circulating water in the underground heat exchange well 11 in the areas with cold winter and hot summer is directly circulated to the suspended ceiling cold radiation coil 32 through the ground source side circulating pump P1, the circulating water exchanges heat to 23 degrees and flows back to the underground heat exchange well 11 to exchange heat with shallow rock soil, so that the geothermal energy direct radiation refrigeration under the low cold load working condition is realized, the indoor humidity control is completed by an electric driving mode of the solution dehumidification air conditioner 5, dry cold fresh air is prepared to bear indoor latent heat load and wet load, at the moment, the refrigerating energy efficiency ratio of the whole system is very high, and the energy is saved.
In the summer refrigeration working condition, under the high load working condition, the load demand cannot be met only by ground source direct supply, the ground source heat pump unit 21 needs to be started to prepare the refrigeration circulating water with lower temperature, the load is jointly borne by the air supplied by the suspended ceiling cold radiation coil 32 and the solution dehumidification air conditioner 5, the indoor sensible heat load is borne by the loops of the underground heat exchange well 11, the ground source heat pump unit 21 and the suspended ceiling cold radiation coil 32, the indoor latent heat load and the humidity load are borne by the dry cold fresh air prepared by the solar heat collector 41, the underground heat exchange well 11, the ground source heat pump unit 21 and the double loops of the solution dehumidification air conditioner 5, the solution dehumidification air conditioner 5 works in the heat driving mode at the moment, and when the cold and heat sources cannot meet the dehumidification requirement, the electric driving dehumidification mode is started. Under the working condition, a ground source heat side circulating pump P1, a load side circulating pump P2, a first valve V1, a fourth valve V4 and a fifth valve V5 are started, the ground source heat pump unit 21 operates according to the energy-saving high-temperature cold water working condition, the cold water outlet temperature of the ground source heat pump unit 21 higher than the dew point temperature is set according to the dew point temperature of local fresh air, the cold water with higher temperature is sent to the ceiling cold radiation coil 32 to achieve the refrigeration function of treating indoor sensible heat load, a heat collection circulating pump P3, a heat supply circulating pump P4 and a seventh valve V7 are started, the high-temperature hot water required by the solution regeneration box 51 of the solution dehumidifying air conditioner 5 is prepared through a loop formed by the solar heat collector 41, the heat storage water box 42 and the solution dehumidifying air conditioner 5, and the heat storage water box 42 plays. And (3) starting a ground source hot side circulating pump P1, a load side circulating pump P2, a third valve V3, a fifth valve V5 and a sixth valve V6, preparing cold water required for dehumidification through a loop formed by the underground heat exchange well 11, the ground source heat pump unit 21 and the fresh air dehumidification box 52 of the solution dehumidification air conditioner 5, and sending dry cold fresh air prepared through the two loops into a room at the tail end of radiation.
The solution dehumidification air conditioner 5 in this embodiment has the working principle that: the solution dehumidifying air conditioner 5 operates in two working modes of thermal driving and electric driving according to the demand size of fresh air humidity load, the thermal driving working mode utilizes solar energy and geothermal energy to cool and dehumidify indoor fresh air, the electric driving mode is started for cooling and dehumidifying only when a cold and heat source can not meet the demand of dehumidification quantity, the thermal driving working principle is that under the working condition of summer, air to be processed mixed by outdoor fresh air and indoor return air is contacted and subjected to heat and mass transfer in a fresh air dehumidifying box 52 and cold water-cooled low-temperature solution prepared by a ground source heat pump, in the process of treatment in exchange, the temperature is reduced and the humidity is reduced simultaneously so as to become low-humidity low-temperature air supply to be sent into a building, in a solution regeneration loop, the outdoor fresh air enters a regeneration core of a solution regenerating box 51, and the fresh air in the regeneration core is contacted with the high-temperature solution heated by a solar heat collector 41 and subjected to heat and mass transfer, during the exchange, the temperature of the fresh air rises and the humidity increases to become high-temperature and high-humidity exhaust air which is discharged into the atmosphere, and the solution is concentrated and circulated to the fresh air dehumidifying box 52 for use. Therefore, the solar energy is fully utilized for dehumidification of fresh air in summer, condensation of the indoor ceiling cold radiation coil 32 is prevented, meanwhile, the solution dehumidification air conditioner 5 has high energy efficiency and remarkable energy-saving property of heat recovery, and high-efficiency energy-saving independent partition temperature and humidity regulation is facilitated through heat and humidity separate treatment.
Under the heating working condition in winter, under the condition of low load, the hot water collected by the solar heat collector 41 and the heat storage water tank 42 is directly injected into the floor radiant heating coil 31 through the heat collection circulating pump P3 and the heat supply circulating pump P4 for circulating heating, when the load is large, the underground heat exchange well 11 and the ground source heat pump unit 21 are started, the ground source circulating pump P1 and the load circulating pump P2 are started at the same time, and the prepared hot water with the required temperature is injected into the floor radiant heating coil 31, so that the heating effectiveness of the floor is guaranteed. And during the intermittent operation period in the transition season and winter, the hot water in the solar heat collector 41 can be injected into the underground heat exchange well 11 for the quick recovery of the underground temperature field, which is beneficial to improving the utilization efficiency of the whole operation energy. The energy-saving potential of people is fully developed while the requirements of people on thermal comfort and high air quality are met.
The specific operating conditions and the device switch states in this embodiment are shown in the following table.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although terms such as the buried pipe heat exchange system 1, the buried heat exchange well 11, the ground source heat pump unit system 2, the ground source heat pump unit 21, the building indoor radiation end system 3, the floor radiation heating coil 31, the ceiling cold radiation coil 32, the solar heat collection system 4, the solar heat collector 41, the heat storage water tank 42, the solution dehumidifying air conditioner 5, the solution regeneration tank 51, the fresh air dehumidifying tank 52, the ground source side circulating pump P1, the load side circulating pump P2, the heat collection circulating pump P3, the heat supply circulating pump P4, the first valve V1, the second valve V2, the third valve V3, the fourth valve V4, the fifth valve V5, the sixth valve V6, the seventh valve V7, the eighth valve V8, and the ninth valve V9 are used more often, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. A combined system of ultra-low energy consumption heating and refrigeration of a coupling photo-thermal collector and a geothermal collector comprises a buried pipe heat exchange system (1), the buried pipe heat exchange system (1) is connected with the ground source heat pump unit system (2), and the buried pipe heat exchange system (1) and the ground source heat pump unit system (2) are respectively connected with the indoor radiation tail end system (3) of the building, it is characterized in that the system also comprises a solar heat collecting system (4) connected with the indoor radiation tail end system (3) of the building, and the solar heat collecting system (4), the ground source heat pump unit system (2) and the buried pipe heat exchange system (1) are connected in parallel on the indoor radiation tail end system (3) of the building, the solar heat collecting system (4) is connected with a solution dehumidifying air conditioner (5), and the solution dehumidifying air conditioner (5) is connected with the indoor radiation tail end system (3) of the building.
2. The combined ultra low energy heating and cooling system of a coupled photothermal and geothermal collector according to claim 1, wherein the buried heat exchange system (1) comprises at least one buried heat exchange well (11), and the buried heat exchange well (11) is connected to the indoor radiation end system (3) of the building by a ground source side circulation pump (P1).
3. The combined heating and cooling system with ultra-low energy consumption of a coupled photo-thermal and geothermal collector according to claim 2, wherein the ground source heat pump unit system (2) comprises a ground source heat pump unit (21) connected with the underground heat exchange well (11) through a ground source side circulating pump (P1), and the ground source heat pump unit (21) is respectively connected with the indoor radiation end system (3) of the building and the solution dehumidifying air conditioner (5) in parallel through a load side circulating pump (P2).
4. The combined heating and cooling system with ultra-low energy consumption of a coupled photo-thermal and geothermal collector according to claim 3, wherein the building indoor radiant end system (3) comprises a floor radiant heating coil (31) and a ceiling cold radiant coil (32) sequentially arranged respectively, and the ceiling cold radiant coil (32) is connected in parallel with the ground source side circulating pump (P1), the load side circulating pump (P2) and the solution dehumidifying air conditioner (5) respectively, and the floor radiant heating coil (31) is connected in parallel with the solar heat collecting system (4), the load side circulating pump (P2) and the solution dehumidifying air conditioner (5) respectively.
5. The combined system of ultra low energy heating and cooling of a coupled photo-thermal and geothermal collector according to claim 4, wherein the solution dehumidifying air conditioner (5) comprises a solution regenerating tank (51) and a fresh air dehumidifying tank (52), the solution regenerating tank (51) is connected to the solar heat collecting system (4), and the fresh air dehumidifying tank (52) is disposed in parallel between the floor radiant heating coil (31) and the ceiling cold radiant coil (32).
6. The combined ultra low energy heating and cooling system of a coupled photo-thermal and geothermal collector according to claim 5, wherein the solar collector system (4) comprises a solar collector (41), the solar collector (41) is connected to a hot water storage tank (42) by a heat collection circulation pump (P3), and the hot water storage tank (42) is connected in parallel to a solution regeneration tank (51) and a radiant floor heating coil (31) by a heat supply circulation pump (P4).
7. The combined heating and cooling system with ultra-low energy consumption of a coupled solar-thermal and geothermal collector according to claim 4, 5 or 6, wherein a first valve (V1) is arranged between the buried heat exchange well (11) and the ground source heat pump unit (21), and a second valve (V2) is arranged between the buried heat exchange well (11) and the ceiling cold radiation coil (32).
8. The combined ultra low energy heating and cooling system of a coupled photothermal and geothermal collector according to claim 5, wherein a fifth valve (V5), a third valve (V3) and a ninth valve (V9) are sequentially provided between the load side circulation pump (P2) and the radiant floor heating coil (31).
9. The combined ultra low energy heating and cooling system of a coupled photo-thermal and geothermal collector according to claim 8, wherein the ceiling cold radiation coil (32) is connected between the fifth valve (V5) and the third valve (V3) through a fourth valve (V4), and the fresh air dehumidifying tank (52) is connected between the third valve (V3) and the ninth valve (V9) through a sixth valve (V6).
10. The combined ultra low energy heating and cooling system of a coupled photo-thermal and geothermal collector according to claim 6, wherein the heat circulation pump (P4) is connected with an eighth valve (V8), and the solution regeneration tank (51) is connected between the heat circulation pump (P4) and the eighth valve (V8) through a seventh valve (V7).
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