CN101718452A - Geothermal-based central heating system using thermal-increasing heat supply machine unit and method thereof - Google Patents
Geothermal-based central heating system using thermal-increasing heat supply machine unit and method thereof Download PDFInfo
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- CN101718452A CN101718452A CN200910238453A CN200910238453A CN101718452A CN 101718452 A CN101718452 A CN 101718452A CN 200910238453 A CN200910238453 A CN 200910238453A CN 200910238453 A CN200910238453 A CN 200910238453A CN 101718452 A CN101718452 A CN 101718452A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 242
- 239000002689 soil Substances 0.000 claims abstract description 41
- 239000000284 extract Substances 0.000 claims abstract description 21
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 70
- 238000010521 absorption reaction Methods 0.000 claims description 48
- 206010037660 Pyrexia Diseases 0.000 claims description 13
- 230000005855 radiation Effects 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-PWCQTSIFSA-N Tritiated water Chemical compound [3H]O[3H] XLYOFNOQVPJJNP-PWCQTSIFSA-N 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 7
- 239000008400 supply water Substances 0.000 claims description 7
- 239000003673 groundwater Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000010865 sewage Substances 0.000 claims description 2
- 239000002352 surface water Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 4
- 230000017525 heat dissipation Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 238000007630 basic procedure Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
Abstract
The invention relates to a geothermal-based central heating method using a thermal-increasing heat supply machine unit, belonging to the field of heat supply engineering. The method adopts the soil source or water source thermal-increasing heat supply machine unit to replace a heat exchanger used in the conventional central heating method, uses high temperature hot water supplied by a primary heat supply network as the driving heat source of the thermal-increasing heat supply machine unit, extracts heat from low grade heat source such as thin layer soil or water source, and supplies heat to the user by heating a secondary heat supply network by using the driving heat source and the low grade heat source. The heating method mainly comprises a centralized heat source (which is generally a cogeneration unit, fire coal, a gas heating boiler or the like), the primary heat supply network, the thermal-increasing heat supply machine unit, the secondary heat supply network, an underground embedded pipe, a water source taking well, a recharge well, a heat dissipation end arranged at the side of the user, and accessories connected with the heat dissipation end. Compared with the conventional central heating method, the method expands the forms of the heat sources of a central heating system, thus improving the heating capability of the system and reducing the heating cost.
Description
Technical field
The present invention proposes a kind of ground pattern of fever central heating mode of utilizing gain of heat type heat supply unit, belongs to the Heat Supply Engineering field.
Conventional relatively central heating mode, this mode utilizes gain of heat type heat supply unit to replace heat exchange station in the conventional central heating mode, utilize high-temperature-hot-water that heat supply network provides as gain of heat type heat supply unit driving heat source, make full use of a net height warm water's acting ability, under the prerequisite of not newly-increased other energy resource consumption, drive gain of heat type heat supply unit and from low-grade underground heat or thermal water resource, extract heat.Compare conventional central heating mode, this mode has been expanded the thermal source form of central heating system, has increased system's heat capacity, has reduced heat cost.
Background technology
In the resourceful area of China's GEOTHERMAL WATER, utilize the heat supply of GEOTHERMAL WATER resource to have characteristics such as environment protecting is good, heat cost is low.Usually utilize the GEOTHERMAL WATER heat-supplying mode to be divided into two kinds, a kind of be GEOTHERMAL WATER by direct or indirect heat exchange mode to user's heat supply.The shortcoming of this heat-supplying mode is that the return water temperature of GEOTHERMAL WATER is higher, and geothermal energy resources utilize insufficient, and the GEOTHERMAL WATER consumption is big, waste is more serious.Another kind is to utilize electric heat pump that GEOTHERMAL WATER is carried out cascade utilization, reduces the return water temperature of GEOTHERMAL WATER.
Utilize the electronic soil source or the water source heat pump technology of geothermal using resource to obtain large-scale popularization and application at present in China.Electric heat pump extracts heat in the winter time during heating and is used for heat supply from low-grade geothermal using or water source resource, when summer air-conditioning indoor heat is discharged in the geothermal using resource.If the electric heat pump system can not accomplish summer in winter balance from underground extraction and summer to the heat of subsurface disposal winter, then can reduce the performance of unit along with the increase of running time.Under identical heating and air-conditioning area, usually soil source and water source electric heat pump unit are drained into underground heat in summer and are greater than winter from the underground heat that takes out, and therefore utilize the electric heat pump unit of geothermal using resource to occur winter from underground heat-obtaining amount and summer easily to underground heat exhaust energy imbalance.Not only bad for the operation of unit, also destroy the thermal balance in thin solum source easily like this.
Under the prerequisite of the identical heat of preparation, the electric heat pump heat-supplying mode need consume a large amount of electric energy as drive source, uses in the economy of higher this system of regional influence of electricity price.Electric heat pump adopts the dispersed supply of heating mode more, if use with traditional central heating resource consolidation, then can consume more electric energy on the hot water distributing system, reduces the economy of system more.But in traditional central heating system once the high-temperature-hot-water that provides of net still have certain acting ability, can from low-grade heat source, extract a part of heat as driving heat source with it, if high-temperature-hot-water adopts the heat exchanger heat exchange mode, then the acting ability of high-temperature-hot-water then is wasted.
This patent proposes a kind of novel terrestrial central heating mode of utilizing gain of heat type heat supply unit for this reason, this mode utilizes high-temperature-hot-water in the central heating system as driving heat source, drives gain of heat type heat supply unit and extracts heat be used for heat supply from low-grade geothermal using or water source.Such unit can also be converted to the refrigeration unit use that high-temperature-hot-water drives summer.
This novel central heating mode can make full use of the acting ability of central heat source high-temperature-hot-water, geothermal energy resources and traditional central heating resource can be effectively integrated again, solves problems such as central heating resource thermal source shortage.If adopt the low-grade heat source of underground high-temperature-hot-water as gain of heat type unit, then can reduce the temperature of recharging of GEOTHERMAL WATER, increase the temperature difference of utilizing of GEOTHERMAL WATER, improve the heat-obtaining amount of unit volume GEOTHERMAL WATER.Compare with electronic soil source heat pump heat-supplying mode; if adopt the low-grade heat source of soil source as gain of heat type unit; soil source gain of heat type unit can realize that winter, can better protection geothermal using resource from soil heat-obtaining and the seasonal thermal balance of sky to the soil discharges heat under identical heating load.
Summary of the invention
For addressing the above problem, the present invention proposes a kind of ground pattern of fever central heating method and system that utilizes gain of heat type heat supply unit.Utilize hot water that heat supply network provides driving heat source, utilize gain of heat type heat supply unit to extract low-grade soil source or water source resource to user's heat supply as gain of heat type heat supply unit.Than the electric heat pump mode, this mode can make full use of the acting ability of the high-temperature-hot-water of central heating system raising, reduces the consumption to the high-quality energy.This mode can effectively integrate geothermal energy resources and central heating resource in addition, reduces the initial cost of heat supply network and central heat source, increases the heat capacity of central heating system, reduces the heat cost of central heating.
The present invention propose the ground pattern of fever central heating system that utilizes gain of heat type heat supply unit, it is characterized in that this heating system contains central heating. the heat radiation end and the coupling thereof of thermal source, heat supply network, gain of heat type heat supply unit, buried pipeline or a water source water intake well and water source inverted well, secondary heat supply network, user side; Described gain of heat type heat supply unit is soil source gain of heat type heat supply unit or water source gain of heat type heat supply unit, wherein soil source gain of heat type heat supply unit is made of absorption heat pump, heat supply network water-water heat exchanger and connecting line thereof, and water source gain of heat type heat supply unit is made of absorption heat pump, heat supply network water-water heat exchanger, underground heat water-water heat exchanger, water source water intake well and water source inverted well and connecting line thereof.
In above-mentioned heating system, when the temperature of GEOTHERMAL WATER is higher than the return water temperature of secondary net, adopt high-temperature geothermal water source gain of heat type heat supply unit, this unit is made of absorption heat pump, heat supply network water-water heat exchanger, first order underground heat water-water heat exchanger, second level underground heat water-water heat exchanger.
The ground pattern of fever central heating method of utilizing gain of heat type heat supply unit that the present invention proposes, it is characterized in that, it is to utilize hot water that heat supply network the provides driving heat source as gain of heat type heat supply unit, utilizes gain of heat type heat supply unit to extract low-grade soil source or water source resource to user's heat supply; The high-temperature-hot-water that central heat source produces is transported to the gain of heat type heat supply unit that is arranged in each thermal substation by a heat supply network supply channel, the high-temperature-hot-water that heat supply network provides is as the driving heat source of gain of heat type heat supply unit, drive gain of heat type heat supply unit and from the underground heat water source, extract heat, one time hot net water turns back to the central heat source place through gain of heat type heat supply unit cooling back by a heat supply network water return pipeline, heated by central heat source again, finish once net hot water circuit process; The secondary net hot water backwater who comes out from hot user enters the gain of heat type heat supply unit by secondary net water return pipeline, flow to hot user through the secondary net hot water after the heating by secondary net supply channel, behind the heat radiation end of overheated user side, heat is discharged to hot user, finish secondary net hot water circuit process; Gain of heat type heat supply unit utilizes a heat supply network high-temperature-hot-water as driving heat source, from low-grade geothermal using resource, earth surface water source, municipal sewage or deep layer high-temperature geothermal water source, extract heat, utilize the heat heating secondary net hot water that extracts in heat that driving heat source provides and the low-grade heat source then, and by secondary net hot water to user's heat supply.
In above-mentioned heat supply method, described water source gain of heat type heat supply unit is recharged in the water source inverted well by the heat in the water source side water-water heat exchanger extraction low-grade heat source water after the water release heat of extracting out from the water source pumped well again; Described soil source gain of heat type heat supply unit utilizes water and the thin solum heat-shift in the underground buried tube, and thin solum is as the low-grade heat source of gain of heat type heat supply unit.
In above-mentioned heat supply method, the flow process of described once net hot water in gain of heat type heat supply unit is as follows: the high-temperature-hot-water that heat supply network provides at first enters in the absorption heat pump in the gain of heat type heat supply unit, driving heat source as gain of heat type heat supply unit, drive absorption heat pump in the gain of heat type heat supply unit by extracting the heat of thin solum, underground water or deep phreatic water in underground heat water-water heat exchanger or the ground heat exchanger, and the heat that extracts in heat in the high-temperature-hot-water and the low temperature geothermal water is discharged to secondary heat supply network backwater.Because the temperature through the once net hot water behind the absorption heat pump is still higher, can utilize the heat supply network water-water heat exchanger that the secondary hot net water that is absorbed the formula heat pump and crosses is continued heating for this reason, reach the supply water temperature requirement until secondary net hot water.
In above-mentioned heat supply method, for water source type gain of heat type heat supply unit, after the lower underground water of temperature is extracted out from underground wet well, directly enter in the underground water-water heat exchanger in the gain of heat type heat supply unit, temperature reduced after underground water was absorbed formula heat pump extraction heat, and the underground water after the cooling is recharged in the ground water recharging well again.
In above-mentioned heat supply method, for soil source type gain of heat type heat supply unit, the water in the underground buried tube enters the low temperature side release heat of the absorption heat pump in the gain of heat type heat supply unit, through turning back to the heat that extracts in the ground pipe laying in the soil after the cooling again.
In above-mentioned heat supply method, for geothermal source gain of heat type heat supply unit, the leaving water temperature in geothermal well is lower than the return water temperature of secondary net, and the heat supply method of GEOTHERMAL WATER is identical with the flow process of water source gain of heat type heat supply unit; The return water temperature that is higher than secondary net hot water when the temperature of GEOTHERMAL WATER, GEOTHERMAL WATER is at first through the first order underground heat water-water heat exchanger cooling in the gain of heat type heat supply unit, heat is discharged to part secondary heat supply network backwater, part secondary heat supply network backwater is heated to water supply requirement, then this partly hot water enter second level underground heat water-water heat exchanger and continue cooling, heat is discharged low temperature side to absorption heat pump, recharge in the geothermal water reinjection well with lower temperature through the GEOTHERMAL WATER behind the absorption heat pump.
In above-mentioned heat supply method, described secondary net hot water is as follows in the middle flow process of gain of heat type heat supply unit: for water source and soil source gain of heat type heat supply unit, secondary heat supply network backwater heats up through the absorption heat pump in the unit earlier, and then through the intensification of heat supply network water-water heat exchanger, up to reaching the secondary net heat supply temperature that needs; Perhaps secondary net hot water is divided into the two-way parallel connection and enters gain of heat type heat supply unit, be heated to secondary net supply water temperature by absorption heat pump or heat supply network water-water heat exchanger respectively.
In above-mentioned heat supply method, described for geothermal source gain of heat type heat supply unit, the secondary hot net water that enters behind the gain of heat type heat supply unit is divided into two parts, part secondary net hot water is heated by first order underground heat water-water heat exchanger, another part secondary net hot water is heated, is continued heating by the heat supply network water-water heat exchanger again by the absorption type heat pump assembly earlier, up to reaching the secondary net heat supply temperature that needs; Perhaps secondary net hot water is divided into three tunnel parallel connections and enters gain of heat type heat supply unit, be heated to secondary net supply water temperature by absorption heat pump or heat supply network water-water heat exchanger or first order underground heat water-water heat exchanger respectively.
Major advantage of the present invention is as follows: the first, with respect to traditional central heating mode, under identical area of heat-supply service, after adopting gain of heat type heat supply unit, the design capacity of central heat source reduces, and the hot water flow of a heat supply network can reduce, and the initial cost of heat supply network and central heat source all can reduce; Second, the high-temperature-hot-water that heat supply network provides still has certain acting ability, can be used as gain of heat type heat supply unit driving heat source, under the prerequisite that does not increase other energy resource consumption newly, can from low-grade heat source (as geothermal using or water source), extract heat and be used for heat supply.The thermal source of whole heating system had both comprised the central heating thermal source, comprised the low-grade heat source that is dispersed in each thermal substation place again.Can increase the heat capacity of central heating system, alleviate the problem of urban district heating system heat source insufficiency; The 3rd, the water source thermal source of geothermal using resource or low-grade heat source is included in the concentrated supply of heating in the city thermal source, under identical area of heat-supply service, can reduce the energy-output ratio of conventional thermal source, reduce heat cost; The 4th, for the underground heat central heating mode of soil source gain of heat type heat supply unit, drive soil source heat pump with electricity and compare, the former more helps realizing the thermal balance of winter and summer, and the primary energy utilization ratio of system is higher.
Description of drawings
Fig. 1 is the basic procedure schematic diagram that utilizes the novel central heating mode of dissimilar gain of heat type heat supply units of the present invention.
The symbol implication is as follows among the figure:
The hot user 8-of a heat supply network return pipe of the 1-central heating thermal source 2-heat supply network feed pipe 3-4-soil source gain of heat type heat supply unit 5-secondary heat supply network feed pipe 6-secondary heat supply network return pipe 7-absorption heat pump 9-heat supply network water-water heat exchanger 10-groundwater supply pipe 11-underground water return pipe 12-underground buried tube 13-water source gain of heat type heat supply unit 14-underground water-water heat exchanger 15-water source side pumped well 16-water source side inverted well 17-geothermal source gain of heat type heat supply unit 18-first order underground water-water heat exchanger 19-second level underground water-water heat exchanger 20-GEOTHERMAL WATER pumped well 21-geothermal water reinjection well.
Fig. 2 is the novel central heating mode basic procedure schematic diagram that utilizes water source gain of heat type heat supply unit of the present invention.
Symbol among the figure: side pumped well 12-water source, side water-water heat exchanger 9-absorption heat pump 10-heat supply network water-water heat exchanger 11-water source, the terminal 8-water source of the heat radiation of a heat supply network return pipe of 1-central heating thermal source 2-heat supply network feed pipe 3-4-water source gain of heat type heat supply unit 5-secondary heat supply network feed pipe 6-secondary heat supply network return pipe 7-user side side inverted well.
Fig. 3 is the ground pattern of fever central heating mode schematic flow sheet that utilizes soil source gain of heat type heat supply unit of the present invention.
Symbol among the figure: pipe laying feed pipe 11-ground, the terminal 8-absorption heat pump 9-heat supply network water-water heat exchanger 10-ground of the heat radiation of the hot user side of a heat supply network return pipe of 1-central heating thermal source 2-heat supply network feed pipe 3-4-soil source gain of heat type heat supply unit 5-secondary heat supply network feed pipe 6-secondary heat supply network return pipe 7-pipe laying return pipe 12-underground buried tube.
Fig. 4 is the ground pattern of fever central heating mode basic procedure schematic diagram that utilizes geothermal source gain of heat type heat supply unit of the present invention.
Symbol among the figure: 1-central heating thermal source; Heat supply network of 2-supplies water; Heat supply network backwater of 3-; 4-geothermal source gain of heat type heat supply unit; 5-secondary heat supply network backwater; 6-secondary heat supply network supplies water; 7-is warm, and the user side heat radiation is terminal; 8-GEOTHERMAL WATER water intake well; 9-first order underground heat water-water heat exchanger; 10-second level underground heat water-water heat exchanger; The 11-absorption heat pump; 12-heat supply network water-water heat exchanger.
Fig. 5 is soil source of the present invention or water source gain of heat type heat supply unit and conventional thermal substation associating central heating mode schematic diagram.
Meet among the figure: terminal 8 absorption heat pumps, the 9 heat supply network water-water heat exchangers of the heat radiation of 3 heat supply network return pipes of 2 heat supply network feed pipes of 1 central heating thermal source, 4 soil source gain of heat type heat supply units, 5 secondary heat supply network feed pipes, 6 secondary heat supply network return pipes, 7 hot user sides 10 ground pipe laying feed pipes 11 ground pipe laying return pipes 12 buried pipelines 13 water source gain of heat type heat supply units 14 water source side water-water heat exchangers 15 water source side pumped wells 16 water source side inverted wells 17 conventional water-water heat exchange unit.
The specific embodiment
Below in conjunction with specific embodiment, the specific embodiment of the present invention is described.
Technical scheme of the present invention is to utilize gain of heat type heat supply unit to substitute heat exchanger in traditional thermal substation, and gain of heat type heat supply unit utilizes hot water that heat supply network provides as driving heat source, extracts heat simultaneously from soil or GEOTHERMAL WATER, and to user's heat supply.This novel central heating system is to be made of the heat radiation end of central heating thermal source, heat supply network, gain of heat type heat supply unit, water source side water-water heat exchanger, heat supply network water-water heat exchanger, underground buried tube, water source pumped well and inverted well, secondary heat supply network and a user side and pipeline thereof and annex.
According to different low-grade heat source forms, utilize application form some difference slightly of the central heating system of gain of heat type heat supply unit.At low-grade water source, can use water source gain of heat type heat supply unit; At the thin solum thermal source, can use soil source gain of heat type heat supply unit, at the high-temperature geothermal water source, can use geothermal source gain of heat type heat supply unit.Different according to low-grade heat source form and user both can have one type gain of heat type heat supply unit in central heating system, also can unite use by polytype gain of heat type heat supply unit, can also unite use with the thermal substation of routine.
The hot water that central heat source provides is transported to the gain of heat type heat supply unit that is arranged in each thermal substation by a heat supply network, and the driving heat source as gain of heat type heat supply unit turns back to central heat source through a heat supply network then.Low-grade heat source water is as the low-grade heat source of gain of heat type heat supply unit, and low-grade heat source water turns back to low-grade heat source again after lowering the temperature.Gain of heat type heat supply unit utilizes a heat supply network hot water to extract heat as driving heat source from low-grade geothermal using or water source, is used to heat secondary net backwater, provides heat to the user.
Embodiment 1: a kind of novel central heating mode of utilizing water source gain of heat type heat supply unit
Utilize the novel central heating mode of water source gain of heat type heat supply unit.As shown in Figure 1, system is made up of with return pipe 3, water source gain of heat type heat supply unit 4, secondary heat supply network return pipe 5 and feed pipe 6, user side heat radiation end 7, water source side pumped well 11, water source side back water well 12 and annex thereof central heating thermal source 1 (normally cogeneration of heat and power, fire coal or gas fired-boiler room), a heat supply network feed pipe 2.Wherein water source side gain of heat type heat supply unit 4 is to be made of water source side water-water heat exchanger 8, absorption heat pump 9, heat supply network water-water heat exchanger 10 and connecting line thereof.Central heating thermal source 1 produces about 130 ℃ hot water, by a heat supply network feed pipe 2 with delivery water-supply source gain of heat type heat supply unit 4, once net hot water at first enters absorption heat pump 9 after entering gain of heat type heat supply unit, and is used as the driving heat source of absorption heat pump 9.The temperature of the once net hot water that comes out from absorption heat pump 9 is still higher, can continue heating secondary net hot water by heat supply network water-water heat exchanger 10, after one time hot net water is lowered the temperature through the heat supply network water-water heat exchanger, return central heating thermal source 1 by a heat supply network return pipe 3 again.The low-grade hot water that water source side pumped well 11 is extracted out enters behind the water source side water-water heat exchanger 8 low temperature side that heat is discharged to absorption heat pump 9.After low-grade hot water was absorbed formula heat pump 9 extraction heats, low-grade water source side hot water cooled to about 10 ℃ approximately, is recharged in the water source side inverted well 12.User side secondary net backwater at first enters in the absorption heat pump 9 and is heated, the heat that is used as driving heat source from water source side water-water heat exchanger in the heat that absorption heat pump 9 will extract and the net height warm water discharges to secondary net backwater, secondary net backwater after temperature improves enters in the heat supply network water-water heat exchanger 10 again and continues to be heated, and secondary net hot water is sent in the heat radiation end 7 of user side through secondary net feed pipe 5 after reaching the heat demand temperature.
Embodiment 2: a kind of ground pattern of fever central heating mode of utilizing soil source gain of heat type heat supply unit
Utilize the ground pattern of fever central heating mode of soil source gain of heat type heat supply unit.As shown in Figure 2, system by the heat radiation end 7 of central heating thermal source 1 (normally cogeneration of heat and power, fire coal or gas fired-boiler room), heat supply network feed pipe 2 and return pipe 3, soil source gain of heat type heat supply unit 4, secondary heat supply network return pipe 5 and feed pipe 6, hot user side, pipe laying feed pipe 10, pipe laying return pipe 11, underground buried tube 12 and annex thereof form.Wherein soil source gain of heat type heat supply unit 4 is to be made of absorption heat pump 8, heat supply network water-water heat exchanger 9 and connecting line thereof.Central heating thermal source 1 produces about 130 ℃ hot water, give soil source gain of heat type heat supply unit 4 by a heat supply network feed pipe 2 with delivery, once net hot water at first enters absorption heat pump 8 after entering gain of heat type heat supply unit, and is used as the driving heat source of absorption heat pump 8.The temperature of the once net hot water that comes out from absorption heat pump 8 is still higher, can continue heating secondary net hot water by heat supply network water-water heat exchanger 9, after one time hot net water is lowered the temperature through the heat supply network water-water heat exchanger, return central heating thermal source 1 by a heat supply network return pipe 3 again.Absorption heat pump 8 in the soil source gain of heat type heat supply unit 4 extracts the heat in the thin solum from ground heat exchanger 12, and heat and the heat in the thin solum as driving heat source in the high-temperature-hot-water discharged to secondary heat supply network backwater.Can continue to be heated by the heat supply network water-water heat exchanger through the secondary net hot water behind the absorption heat pump 8, reach the heat supply requirement until the supply water temperature of secondary net hot water.Water in the underground buried tube enters behind the gain of heat type heat supply unit low temperature side that heat is discharged to absorption heat pump 8, turns back to the heat that extracts in the ground pipe laying in the soil again after through the cooling of gain of heat type heat supply unit.
Soil source gain of heat type heat supply unit also can with unite use after conventional water-water heat exchange station or water source gain of heat type heat supply unit are in parallel.As shown in Figure 2.
Embodiment 3: a kind of ground pattern of fever central heating mode of utilizing geothermal source gain of heat type heat supply unit
A kind of ground pattern of fever central heating mode of utilizing geothermal source gain of heat type heat supply unit.As shown in Figure 3, system is made up of with return pipe 3, geothermal source gain of heat unit 4, secondary heat supply network return pipe 5 and feed pipe 6, user side heat radiation end 7, underground heat wet well 8, underground heat back water well 9 and annex thereof central heating thermal source 1 (normally cogeneration of heat and power, fire coal or gas fired-boiler room), a heat supply network feed pipe 2.Central heating thermal source 1 produces about 130 ℃ hot water, and by a heat supply network feed pipe 2, as its driving heat source, the type of the thermal source gain of heat drivingly heat supply unit extracts heat from GEOTHERMAL WATER with hot water supply geothermal source gain of heat type heat supply unit 4 then.Once net hot water is still higher from the temperature that absorption heat pump 11 comes out, can continue by heat supply network water-water heat exchanger 12 heat transferred part secondary net hot water, after the cooling of heat supply network water-water heat exchanger, return central heating thermal source 1 by a heat supply network return pipe 3 again.Usually about 50～100 ℃, GEOTHERMAL WATER discharges heat to part secondary hot net water by first order underground heat water-water heat exchanger earlier the leaving water temperature of geothermal well.Because the temperature of GEOTHERMAL WATER is still higher, still can be utilized, in order to increase the heat-obtaining amount of unit volume GEOTHERMAL WATER, the GEOTHERMAL WATER of coming out from first order underground heat water-water heat exchanger enters the low temperature side of absorption heat pump 11 again, after being absorbed formula heat pump extraction heat, GEOTHERMAL WATER cools to about 10 ℃ approximately, is recharged in the geothermal well 13 more at last.User side secondary net backwater is divided into three parts, and by first order underground heat water-water heat exchanger 9, absorption heat pump 11,12 heating of heat supply network water-water heat exchanger, the back of heating up feeds to the user by the secondary net respectively.
Embodiment 4: a kind of novel central heating mode of utilizing dissimilar gain of heat type heat supply units
According to the difference of low-grade heat source form, the gain of heat type heat supply unit that is fit to dissimilar low-temperature heat sources can be united use in a system.As shown in Figure 4.
Claims (10)
1. utilize the ground pattern of fever central heating system of gain of heat type heat supply unit, it is characterized in that this heating system contains central heating. the heat radiation end and the coupling thereof of thermal source, heat supply network, gain of heat type heat supply unit, buried pipeline or a water source water intake well and water source inverted well, secondary heat supply network, user side; Described gain of heat type heat supply unit is soil source gain of heat type heat supply unit or water source gain of heat type heat supply unit, wherein soil source gain of heat type heat supply unit is made of absorption heat pump, heat supply network water-water heat exchanger and connecting line thereof, and water source gain of heat type heat supply unit is made of absorption heat pump, heat supply network water-water heat exchanger, underground heat water-water heat exchanger, water source water intake well and water source inverted well and connecting line thereof.
2. heating system according to claim 1, it is characterized in that, when the temperature of GEOTHERMAL WATER is higher than the return water temperature of secondary net, adopt high-temperature geothermal water source gain of heat type heat supply unit, this unit is made of absorption heat pump, heat supply network water-water heat exchanger, first order underground heat water-water heat exchanger, second level underground heat water-water heat exchanger.
3. utilize the ground pattern of fever central heating method of gain of heat type heat supply unit, it is characterized in that, it is to utilize hot water that heat supply network the provides driving heat source as gain of heat type heat supply unit, utilizes gain of heat type heat supply unit to extract low-grade soil source or water source resource to user's heat supply; The high-temperature-hot-water that central heat source produces is transported to the gain of heat type heat supply unit that is arranged in each thermal substation by a heat supply network supply channel, the high-temperature-hot-water that heat supply network provides is as the driving heat source of gain of heat type heat supply unit, drive gain of heat type heat supply unit and from the underground heat water source, extract heat, one time hot net water turns back to the central heat source place through gain of heat type heat supply unit cooling back by a heat supply network water return pipeline, heated by central heat source again, finish once net hot water circuit process; The secondary net hot water backwater who comes out from hot user enters the gain of heat type heat supply unit by secondary net water return pipeline, flow to hot user through the secondary net hot water after the heating by secondary net supply channel, behind the heat radiation end of overheated user side, heat is discharged to hot user, finish secondary net hot water circuit process; Gain of heat type heat supply unit utilizes a heat supply network high-temperature-hot-water as driving heat source, from low-grade geothermal using resource, earth surface water source, municipal sewage or deep layer high-temperature geothermal water source, extract heat, utilize the heat heating secondary net hot water that extracts in heat that driving heat source provides and the low-grade heat source then, and by secondary net hot water to user's heat supply.
4. heat supply method according to claim 3, it is characterized in that, described water source gain of heat type heat supply unit is recharged in the water source inverted well by the heat in the water source side water-water heat exchanger extraction low-grade heat source water after the water release heat of extracting out from the water source pumped well again; Described soil source gain of heat type heat supply unit utilizes water and the thin solum heat-shift in the underground buried tube, and thin solum is as the low-grade heat source of gain of heat type heat supply unit.
5. heat supply method according to claim 3, it is characterized in that: the flow process of described once net hot water in gain of heat type heat supply unit is as follows: the high-temperature-hot-water that heat supply network provides at first enters in the absorption heat pump in the gain of heat type heat supply unit, driving heat source as gain of heat type heat supply unit, drive absorption heat pump in the gain of heat type heat supply unit by extracting the heat of thin solum, underground water or deep phreatic water in underground heat water-water heat exchanger or the ground heat exchanger, and the heat that extracts in heat in the high-temperature-hot-water and the low temperature geothermal water is discharged to secondary heat supply network backwater.Because the temperature through the once net hot water behind the absorption heat pump is still higher, can utilize the heat supply network water-water heat exchanger that the secondary hot net water that is absorbed the formula heat pump and crosses is continued heating for this reason, reach the supply water temperature requirement until secondary net hot water.
6. heat supply method according to claim 3, it is characterized in that, for water source type gain of heat type heat supply unit, after the lower underground water of temperature is extracted out from underground wet well, directly enter in the underground water-water heat exchanger in the gain of heat type heat supply unit, temperature reduced after underground water was absorbed formula heat pump extraction heat, and the underground water after the cooling is recharged in the ground water recharging well again.
7. heat supply method according to claim 3, it is characterized in that, for soil source type gain of heat type heat supply unit, the water in the underground buried tube enters the low temperature side release heat of the absorption heat pump in the gain of heat type heat supply unit, through turning back to the heat that extracts in the ground pipe laying in the soil after the cooling again.
8. heat supply method according to claim 3 is characterized in that, for geothermal source gain of heat type heat supply unit, the leaving water temperature in geothermal well is lower than the return water temperature of secondary net, and the heat supply method of GEOTHERMAL WATER is identical with the flow process of water source gain of heat type heat supply unit; The return water temperature that is higher than secondary net hot water when the temperature of GEOTHERMAL WATER, GEOTHERMAL WATER is at first through the first order underground heat water-water heat exchanger cooling in the gain of heat type heat supply unit, heat is discharged to part secondary heat supply network backwater, part secondary heat supply network backwater is heated to water supply requirement, then this partly hot water enter second level underground heat water-water heat exchanger and continue cooling, heat is discharged low temperature side to absorption heat pump, recharge in the geothermal water reinjection well with lower temperature through the GEOTHERMAL WATER behind the absorption heat pump.
9. heat supply method according to claim 3, it is characterized in that, described secondary net hot water is as follows in the middle flow process of gain of heat type heat supply unit: for water source and soil source gain of heat type heat supply unit, secondary heat supply network backwater heats up through the absorption heat pump in the unit earlier, and then through the intensification of heat supply network water-water heat exchanger, up to reaching the secondary net heat supply temperature that needs; Perhaps secondary net hot water is divided into the two-way parallel connection and enters gain of heat type heat supply unit, be heated to secondary net supply water temperature by absorption heat pump or heat supply network water-water heat exchanger respectively.
10. heat supply method according to claim 3, it is characterized in that, described for geothermal source gain of heat type heat supply unit, the secondary hot net water that enters behind the gain of heat type heat supply unit is divided into two parts, part secondary net hot water is heated by first order underground heat water-water heat exchanger, another part secondary net hot water is heated, is continued heating by the heat supply network water-water heat exchanger again by the absorption type heat pump assembly earlier, up to reaching the secondary net heat supply temperature that needs; Perhaps secondary net hot water is divided into three tunnel parallel connections and enters gain of heat type heat supply unit, be heated to secondary net supply water temperature by absorption heat pump or heat supply network water-water heat exchanger or first order underground heat water-water heat exchanger respectively.
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| CN114251708A (en) * | 2021-12-28 | 2022-03-29 | 北京华源泰盟节能设备有限公司 | Large temperature difference adjusting system based on absorption type heat exchange and adjusting method thereof |
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