CN104913544A - Gas terminal station energy utilization method based on ground source heat pump system - Google Patents

Gas terminal station energy utilization method based on ground source heat pump system Download PDF

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Publication number
CN104913544A
CN104913544A CN201510291855.9A CN201510291855A CN104913544A CN 104913544 A CN104913544 A CN 104913544A CN 201510291855 A CN201510291855 A CN 201510291855A CN 104913544 A CN104913544 A CN 104913544A
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heat pump
source heat
soil
natural gas
summer
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CN104913544B (en
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孙永康
豆连旺
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Shanghai Energy Construction Engineering Design And Research Co ltd
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Shanghai Gas Engineering Design & Research Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00Machines, plants or systems, using particular sources of energy
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a gas terminal station energy utilization method based on a ground source heat pump system; the set of ground source heat pump system is utilized to satisfy the demand on different cooling and heating loads in a gas terminal station in winter and summer. According to the different purposes of the cooling and heating loads in the station, ground source heat pump units are divided into two groups. In winter, the ground source heat pump units absorb heat from soil, and a natural gas heat exchanger or a fan coil in a building is utilized to supply heat to the outside in order to satisfy the demand of the gas terminal station on heat. In summer, the ground source heat pump units supply cold to the building by means of the fan coil. Chilled water heat coming from the fan coil is then absorbed, and with the soil as a heat exhaust source, heat is released into the soil. The energy saving effect of the method of utilizing the ground source heat pump system to satisfy the demand on various cooling and heating loads in the gas terminal station is remarkable, the energy utilization rate is high, the construction investment is low, the operation cost is low, and operation is safe and reliable.

Description

A kind of natural gas station using energy source method based on soil source heat pump system
Technical field
The present invention relates to a kind of using energy source method, be specifically related to a kind of natural gas station using energy source method based on soil source heat pump system.
Background technology
At present, in natural gas station, conventional natural gas heating, the heating of building and the energy resource system of air conditioner refrigerating and domestic hot-water supply are all separate, and energy efficiency is lower, specific as follows:
In natural gas station, be typically provided with the voltage regulation function of natural gas, after namely high-pressure natural gas being depressurized to middle pressure or low pressure by pressure regulator, supply downstream user.According to Joule-Thomson effect, along with the step-down of natural gas, the temperature of natural gas also decreases, and the natural gas temperature sometimes after step-down will reach less than 0 °.For carrying out the natural gas that temperature degree is 0 ~ 5 DEG C, 0.4MPa is down to by 4MPa, natural gas temperature reduces about 20 DEG C, if not to the heated by natural gas before pressure regulation, after pressure regulation, natural temperature is spent low, in pipeline, likely generate gas hydrates (a kind of solid-state white powder), cause pipeline obstruction, have influence on the normal gas transmission of pipeline.In addition, natural gas tube channel temp is too low, also can cause the safe operation of steel pipe.As being used as the 20# steel pipe of natural gas line, can not run under lower than the environment of-20 DEG C.
For this reason, usually before natural gas pressure regulating, intensification heating to be carried out to natural gas, guarantees that the natural gas temperature after pressure regulation is not less than 0 DEG C.Conventional heated by natural gas method has two kinds: (1) utilizes electric heater to heat natural gas; (2) utilize gas fired-boiler heat hot water, then utilize shell-and-tube heat exchanger to heated by natural gas.Utilize electrical heating method system simple, but operating cost is higher.Meanwhile, during electrical heating, thermal power is comparatively large, needs transformer and a payment no small power capacity increasing tariff of installing relatively high power.Although electrical heating method relatively, utilize gas fired-boiler to carry out heated natural gas, operating cost decreases.But the shortcoming of steam generator system is also fairly obvious: boiler thermal output is lower, need to configure fuel gas supply system, also will establish special pipeline for gas, the safety problem brought for preventing gas leakage, the electrical equipment of pipeline for gas all selects anti-explosion product simultaneously.In addition, boiler belongs to pressure vessel, and also will carry out annual test to boiler every year, operational management or system are all very complicated.For city gas station, heated by natural gas occurs in winter mostly, in other season, does not substantially need heating.So no matter electrical heating or utilize gas fired-boiler to heat.Can only run season 1 year part, stop transport At All Other Times, equipment efficiency of usage is not high.
For the natural gas station of hot-summer and cold-winter area, in standing, building usual configuration split-type air conditioner carries out cooling in summer and winter heating.In northern area (as Beijing area), even if winter, air-conditioning full load was run, because outside air temperature is lower, utilize the effect of split-type air conditioner heating and bad.Domestic hot-water also needs configuration electric boiler or gas fired-boiler to solve.Also gas enterprise is had directly to utilize gas fired-boiler to solve heating in station and domestic hot-water's demand.Above-mentionedly mention, except the explosion-proof of pipeline for gas and system complexity, the smoke evacuation of boiler also brings problem of environmental pollution.
Traditional energy supplying system inefficiency of natural gas station, system complex have been undisputable fact, address these problems in the urgent need to adopting new energy supply technology.
Summary of the invention
In view of the above-mentioned defect of prior art, technical problem to be solved by this invention is: provide a kind of and meet the using energy source method of natural gas station in the various cooling and heating load demands of Various Seasonal.
To achieve these goals, the invention provides a kind of natural gas station using energy source method based on soil source heat pump, concrete technical scheme is as follows:
A set of soil source heat pump system is utilized to solve the various cooling and heating load demand of winter and summer in natural gas station; Time in the winter time, soil source heat pump take soil as heat sink, absorbs the heat demand that heat meets natural gas station from soil; When summer, soil source heat pump take soil as heat extraction source, by thermal release unnecessary for natural gas station in soil.Preferably, soil source heat pump system comprises at least two ground source heat pumps, according to the different purposes of thermic load, ground source heat pump is divided into two groups.Ground source heat pump comprises evaporimeter, compressor, condenser, expansion valve, and wherein at least one ground source heat pump also comprises heat regenerator.
Summer refrigeration duty and winter thermic load be more or less the same the summer in area, wherein one group of ground source heat pump is used for building cooling, and another group ground source heat pump is as subsequent use.Summer refrigeration duty to differ the summer of larger area with thermic load in winter, two groups of ground source heat pumps work for building cooling simultaneously.The heat reclaimed through heat regenerator is used for domestic hot-water supply.When cooling in summer, the refrigerant of soil source heat pump evaporates the heat drawn in building in evaporimeter, then is compressed into the gas of HTHP through compressor, then enters condenser condenses, thermal release in underground.Summer, refrigeration duty differed comparatively large with thermic load in winter, and refer to that summer, refrigeration duty was more than the twice of thermic load in winter, these Area during Summer are hot and winter is cold.Not enough twice, illustrate that the temperature difference in summer and winter is relatively little.
In the winter time, wherein one group of ground source heat pump is used for heated by natural gas, and another group ground source heat pump is used for building heating and domestic hot-water supply.When the ground source heat pump for heated by natural gas breaks down, the ground source heat pump for building and heating and domestic hot-water supply stops to building heating and domestic hot-water supply, switches to heated by natural gas.When heating in the winter time, the refrigerant of soil source heat pump evaporates the heat drawing underground in evaporimeter, is compressed into the gas of HTHP, then enters condenser condenses, heating system recirculated water through compressor, and hot water preparing is sent in building and reached heating object.
The invention has the beneficial effects as follows:
1, energy-saving effect is obvious, and energy utilization rate is high.Soil source heat pump, by electric drive, absorbs or release underground heat.No matter freeze or heat supply time, its thermal efficiency will reach more than 4.0, namely utilize the electricity of 1kW to freeze or heat supply 4.0kW.Calculate with the heat of supplying 100kW, as with electric heater, needing electrical power 100kW, as used gas fired-boiler heat supply, needing thermic load to be about 110kW (thermal efficiency is by 90%), and when the heat pump in this patent runs, only need 25kW.Clearly, the fractional energy savings of soil source heat pump reaches 77%, and energy-saving effect is obvious.
2, environment protecting is good.Soil source heat pump only uses some electrical power firmly just to solve the cooling and heating load in station, and without waste gas and the waste water of discharge, little on ambient atmosphere impact, environment protecting is good.And have fume emission, atmosphere pollution after steam generator system burning.
3, equipment efficiency of usage is high.Relatively traditional natural gas station energy supply form, gas fired-boiler or electric heater only run in the winter time, and summer is out of service.Soil source heat pump no matter winter or can run summer, utilization rate of equipment and installations significantly improves.
4, refrigeration and heating effect good, no matter soil source heat pump system freezes or heat, system stability, by fan coil, freeze and heating effect good.And traditional split-type air conditioner, heat supply efficiency decay is serious in the winter time.
5, construction investment is low.Traditional electrical heating, configures powerful transformer and high power capacity increasing tariff, directly causes construction investment superelevation.For boiler heating system, boiler and split-type air conditioner cost higher, simultaneously restricted lifetime.In this patent, the deficiency investment only 2000 yuan of the ground source heat pump of 1kW, and the gas fired-boiler investment about 1500 yuan of 1kW heating capacity, for cooling in summer, also need the investment increasing electric air-conditioning, the investment of the electric air-conditioning of average 1kW about 1000 yuan, traditional heating and air conditioner refrigerating invest about 2500 yuan/kW.Obvious soil source heat pump construction investment price has superiority more.In addition, 50 years soil source heat pump system under ground portion life-spans, aerial part about 30 years, even if source pump also can reach 15 years, no matter boiler or electric heater is difficult to reach this requirement in traditional station.
6, safe and reliable, gas fired-boiler heating system in relative legacy system, the energy needed for the equipment in the art of this patent is electric power, without the need to combustion gas with select antiknock device, there is not the problem that the problems such as the blast that gas leakage brings are quick-fried, native system is safe and reliable to operation.
7, system reliability, source pump grouping in soil source system arranged, be respectively used to heated by natural gas, heating winter, summer is all for refrigeration, not only equipment efficiency of usage is mentioned, but also improves the reliability of natural gas station heated by natural gas in winter, summer cooling.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a preferred embodiment of the present invention.
Detailed description of the invention
Embodiment is described in further detail the present invention below, and embodiment implements under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Soil source heat pump refers to underground to be low-temperature heat source, the cold and heat source system be made up of water source heat pump units, geothermal energy exchange system, heat pump machine room auxiliary equipment.Soil source heat pump consumes the energy of 1kW, and user can obtain the heat of more than 4kW.By inputting a small amount of high-order energy, by low temperature potential energy to the transfer of high temperature potential energy, so that realize not only can heat supply but also can the high-efficiency energy-saving air conditioning system of cooling.Soil source heat pump absorbs heat to underground heat release, winter from underground summer.For the area that some cooling in summer are longer than the winter heating time, summer may be greater than winter from underground heat-obtaining to underground heat release, can cause the thermal unbalance of underground, can improve the thermal balance of soil by condensing units in the source pump in summer.At present, soil source heat pump technology is widely used in all kinds of civil buildings, public building as a kind of advanced person, efficient power-saving technology, and not yet uses in the natural gas station of gas industry.
In natural gas station, cooling and heating load demand has various ways: comprise the heating of natural gas, building heating and cooling and domestic hot-water supply, can be found by classification analysis, only has refrigeration duty and thermic load two kinds of demands.The multiple cooling and heating load demand in station is solved for energy supply technology traditional in natural gas station, operating cost is high, efficiency is low, utilization rate of equipment and installations is low, also need to solve the problems such as explosion-proof simultaneously, the present embodiment proposes a kind of new high efficiency of energy and utilizes technology, namely solves heated by natural gas, building heat supply in winter and the summer cooling in natural gas station and domestic hot-water supply demand in the soil source heat pump technology that utilization is advanced simultaneously.During heating, soil source heat pump take soil as heat sink in the winter time, refrigerant evaporates the heat drawing underground in evaporimeter, be compressed into the superheated steam of HTHP through compressor, then enter condenser heating system recirculated water, the hot water feeding air-conditioned room producing 50 DEG C reaches the object heated.When cooling in summer, soil source heat pump take soil as heat extraction source, and refrigerant evaporates the heat drawing air-conditioned room in evaporimeter, then is compressed into the superheated steam of HTHP through compressor, then enters condenser, thermal release in underground.This technology utilizes by the comprehensive high-efficiency of the energy, utilizes a set of soil source heat pump system to solve various cooling and heating load demand in natural gas station, and reduces operating cost.
This system comprises the ground source heat pump, underground pipe, underground pipe side water circulating pump, user side water circulating pump, heat exchange gas device, fan coil, underground pipe water knockout drum, underground pipe water collector, user side water knockout drum, the user side water collector that are connected by circulation hot water pipe; Underground pipe side water circulating pump and underground pipe water collector are installed between the water side of underground pipe and the water intake end of ground source heat pump underground pipe side, between the water side and the water intake end of underground pipe of ground source heat pump underground pipe side, underground pipe water knockout drum is installed, between the water side and the water intake end of heat exchange gas device or fan coil of ground source heat pump user side, user side water knockout drum is installed, user side water circulating pump and user side water collector are installed between the water intake end and the water side of heat exchange gas device or fan coil of ground source heat pump user side.
Ground source heat pump is configured with heat regenerator, for the condensing units in summer.For realizing the flexible allocation of source pump every side water, be equipped with underground pipe water knockout drum, underground pipe water collector in the import and export of unit underground pipe, in heat pump user side between fan coil and heat exchange gas device, user side water knockout drum, user side water collector are also set.In this system, be also provided with water charging system, expansion tank, the equipment of domestic hot-water's case or system.Soil underground pipe comprises the forms such as horizontal coiled pipe, perpendicularly buried pipe and spirality pipe laying, is described in this patent for vertically pipe laying.
The soil source heat pump system of the present embodiment is hybrid systems, comprise at least two ground source heat pumps, source pump in combined type soil source heat pump system is divided into two groups to use respectively by the thermic load amount according to heated by natural gas, building heating and domestic hot-water.
In summer, temperature degree is higher, and before the internal pressure-regulating of station, natural gas temperature is also higher, does not substantially need the heating that heats up after pressure regulation, even if heating, thermic load is also smaller.Summer, domestic hot-water was mainly used in worker's shower etc., and demand is also very little.Summer is refrigeration duty mainly, the air conditioner refrigerating namely built.Soil source heat pump now only need be utilized to solve the cold and domestic hot-water of the idle call of building.The area that summer is more or less the same for refrigeration duty and thermic load.One group of source pump is run, and for cooling, another group source pump can be used as subsequent use.For hot-summer and cold-winter area, summer, refrigeration duty was higher, was generally the twice of thermic load in winter, and now two groups of soil source heat pumps can work together, can meet the demand of building cooling completely, utilize source pump heat regenerator also can solve domestic hot-water supply simultaneously.
In the heat pump of the art of this patent, in the evaporimeter of heat pump, the refrigerant of heat pump absorbs 12 DEG C of chilled water heats from building fan coil, after chilled water heat release, temperature is reduced to 7 DEG C, turn back to fan coil and room air heat exchange, heat in absorption chamber, thus realize air conditioner refrigerating function.Now absorb the refrigerant after heat in the condenser of heat pump, with the cold water heat exchange from underground pipe, after refrigerant release heat, temperature reduces, again to evaporimeter absorption heat.And in underground pipe cold water absorptive condenser heat after, at the earth soil heat exchange of underground and constant temperature, release heat.In addition, utilize the heat regenerator that heat pump carries, can reclaim the condensation heat of refrigerant, this part callable heat accounts for 20% of condensation heat, and this partial heat can produce 40 DEG C of hot water, for domestic hot-water supply.Thus achieve and utilize constant temperature soil source to realize solving the problem of air conditioner refrigerating and domestic hot-water supply by heat pump simultaneously.
In the winter time, be mainly with heat demand in natural gas station, comprise building and heating thermic load, the thermic load of heated by natural gas intensification, the thermic load of domestic hot-water, native system mainly solves all kinds of thermic loads in station.In the winter time during heat supply, by the valve transfer in source pump, the evaporimeter in source pump absorbs the heat of cooling water in underground pipe, and then release heat in the condenser of heat pump, realizes the function of source pump outward supplying heat.Refrigerant after release heat, after expansion valve throttling, becomes Low temperature low pressure liquid, in the evaporimeter then in heat pump, with from the cold water heat exchange in underground pipe, absorb cooling water heat after, refrigerant temperature raise, be compressed into high temperature and high pressure gas through compressor, circulate heat release to condenser.Refrigerant with from warm water heat exchange in condenser of building fan coil (or heat exchange gas device), after the heat that refrigerant discharges is absorbed by warm water, temperature is increased to 50 ~ 55 DEG C, to building and the heat supply of heat exchange gas device, and solves the supply of domestic hot-water.Meanwhile, in underground pipe, cold water after release heat, returns underground and constant temperature soil heat exchange in evaporimeter, after heat absorption, to the evaporimeter circulation heat release of source pump.
Winter, one group of source pump was used for heated by natural gas, and another source pump is to building heating and domestic hot-water supply under normal circumstances.When the source pump for heated by natural gas breaks down, when cannot normally run, the source pump for building and heating and domestic hot-water supply stops to building heating and domestic hot-water supply, automatically switches and is used for heated by natural gas.So not only greatly improve the reliability of heated by natural gas system, and avoid separately for heated by natural gas unit arranges the investment that unit for subsequent use brings.
Adopt the measure of soil source heat pump system most critical to ensure underground temperature stabilization exactly in addition, at hot-summer and cold-winter area, summer, refrigeration duty was generally the twice of thermic load in winter, and the summer operation time is longer.Therefore, longtime running can cause Soil Thermal to pile up, and adopts the soil source heat pump system of band heat recovery function, can while cooling in summer, recovery section heat, reduces summer to underground heat exhaust, ensures annual cold and hot balance.The condensation heat reclaimed be can be used for producing domestic hot-water to be used simultaneously, obtain good economic effect.
Ground source heat pump is when Summer and winter Various Seasonal is run, and realize summer to user side cooling, winter is to the function of user side heat supply.Mainly by (as shown in the switching table of valve in accompanying drawing 1) that the valve transfer on ground source heat pump system interior conduit realizes, specific as follows:
In summer, in the user side of ground source heat pump system, valve V1, V5 valve open, valve V2, V6 close, evaporimeter now in source pump for cold water, supplies chilled water by user side water knockout drum to the fan coil in building to user side, gives building cooling.By turning back to the evaporimeter of source pump after the water circulating pump supercharging of user side after chilled water heat release.In the underground pipe side of ground source heat pump system, V4, V8 valve open, valve V3, V7 close, the outside heat release of the condenser now in source pump, by underground pipe water knockout drum to soil release heat, then the recirculated water after reduction be back to the condenser of source pump.
In the winter time, by the conversion of operational mode in ground source heat pump, condenser and evaporator function are exchanged.By the valve transfer of system, now evaporimeter is used for underground pipe side, for absorbing soil heat.And condenser be used for user side, be used for outside heat release use.Now user's side valve door V2, V6 valve open, valve V1, V5 close, the condenser now in source pump to user side supplying hot water, by user side water knockout drum to building in fan coil supplying hot water, to building heat supplying.By turning back to the condenser of source pump after the water circulating pump supercharging of user side after air conditioner water heat release.In the underground pipe side of ground source heat pump system, V3, V7 valve open, valve V4, V8 close, the outside heat release of the evaporimeter now in source pump, by underground pipe water knockout drum from soil absorption heat, the recirculated water after intensification is back to the evaporimeter of source pump.
The natural gas station high efficiency of energy based on soil source heat pump mentioned in this patent utilizes technology to have prospect of the application widely in natural gas station.Through exchanging with some gas company, these enterprises existing natural gas station energy supply system runs all not bery desirable, and wherein high, the investment of operating cost is greatly its subject matter.Utilize technology for the high efficiency of energy mentioned in this patent, these gas company all indicate great interest, and are provided in their newly-built natural gas station utilization of being demonstrated.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims (9)

1. based on a natural gas station using energy source method for soil source heat pump, it is characterized in that, utilize a set of soil source heat pump system to solve the various cooling and heating load demand of winter and summer in natural gas station; Time in the winter time, soil source heat pump take soil as heat sink, absorbs heat and meet all kinds of heat demands in natural gas station from soil; When summer, soil source heat pump take soil as heat extraction source, by thermal release unnecessary for natural gas station in soil.
2. a kind of natural gas station using energy source method based on soil source heat pump according to claim 1, it is characterized in that, described soil source heat pump system comprises at least two ground source heat pumps, different according to the cooling and heating load amount demand of station Summer and winter, ground source heat pump is divided into two groups.
3. a kind of natural gas station using energy source method based on soil source heat pump according to claim 2, it is characterized in that, described ground source heat pump comprises evaporimeter, compressor, condenser, expansion valve, and wherein at least one ground source heat pump also comprises heat regenerator.
4. a kind of natural gas station using energy source method based on soil source heat pump according to claim 3, it is characterized in that, summer refrigeration duty and winter thermic load be more or less the same area summer, wherein one group of ground source heat pump is used for building cooling, another group ground source heat pump is as subsequent use, and the heat reclaimed through heat regenerator is used for domestic hot-water supply.
5. a kind of natural gas station using energy source method based on soil source heat pump according to claim 3, it is characterized in that, summer refrigeration duty to differ the summer of larger area with thermic load in winter, two groups of ground source heat pumps work for building cooling simultaneously, and the heat reclaimed through heat regenerator is used for domestic hot-water supply.
6. a kind of natural gas station using energy source method based on soil source heat pump according to any one of claim 4-5, it is characterized in that, when cooling in summer, refrigerant in soil source heat pump evaporates the heat drawn in building in described evaporimeter, the gas of HTHP is compressed into again through compressor, then described condenser condenses is entered, thermal release in underground.
7. a kind of natural gas station using energy source method based on soil source heat pump according to claim 3, it is characterized in that, in the winter time, wherein one group of ground source heat pump is used for heated by natural gas, and another group ground source heat pump is used for building heating and domestic hot-water supply.
8. a kind of natural gas station using energy source method based on soil source heat pump according to claim 7, it is characterized in that, in the winter time, when the described ground source heat pump for heated by natural gas breaks down, the described ground source heat pump for building and heating and domestic hot-water supply stops to building heating and domestic hot-water supply, switches to heated by natural gas.
9. a kind of natural gas station using energy source method based on soil source heat pump according to any one of claim 7-8, it is characterized in that, when heating in the winter time, the refrigerant of soil source heat pump evaporates the heat drawing underground in described evaporimeter, the gas of HTHP is become through described compressor compresses, then enter described condenser condenses, heating system recirculated water, hot water preparing is sent in building and is reached heating object.
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CN105485807A (en) * 2015-12-08 2016-04-13 邢台兆丰源地热能源科技有限公司 Intelligent central air conditioner utilizing superficial layer geothermal energy
CN113237157A (en) * 2021-03-24 2021-08-10 上海市政工程设计研究总院(集团)有限公司 Composite heat pump system suitable for subway station in severe cold area
CN114294847A (en) * 2021-12-28 2022-04-08 中国建筑科学研究院有限公司 Shallow buried pipe and middle-deep buried pipe coupled cold and heat source system and temperature control method thereof

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CN203404880U (en) * 2013-06-13 2014-01-22 湖南天地人空调环保工程有限公司 Closed type cooling tower and buried pipe water-source heat pump type air-conditioning system
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Publication number Priority date Publication date Assignee Title
CN105485807A (en) * 2015-12-08 2016-04-13 邢台兆丰源地热能源科技有限公司 Intelligent central air conditioner utilizing superficial layer geothermal energy
CN113237157A (en) * 2021-03-24 2021-08-10 上海市政工程设计研究总院(集团)有限公司 Composite heat pump system suitable for subway station in severe cold area
CN114294847A (en) * 2021-12-28 2022-04-08 中国建筑科学研究院有限公司 Shallow buried pipe and middle-deep buried pipe coupled cold and heat source system and temperature control method thereof

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