CN105865085A - Coupled saline water layer forced convection well type ground-source heat pump system and operation method - Google Patents
Coupled saline water layer forced convection well type ground-source heat pump system and operation method Download PDFInfo
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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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- 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]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides a coupled saline water layer forced convection well type ground-source heat pump system and an operation method. The heat pump system forms a heat pump unit user side heat supply and cool supply circulation loop, a heat pump unit ground-source side heat supply and cool supply circulation loop, and a saline water layer pumping and injection well forced convection circulation loop, and various operation modes are achieved through the operation method. The coupled saline water layer forced convection well type ground-source heat pump system and the operation method have the effects that the heat exchange intensity of a buried pipe is increased, the phenomena of heat short-circuiting and heat disturbance of a buried pipe heat exchanger are avoided, and the problem of soil heat imbalance caused by seasonal disproportion of building loads in the low laying land around the Bohai Sea is solved. A heat exchanger is additionally arranged in a saline water circulation system and conducts heat exchange with circulation solutions in the buried pipe, and the building load peak is effectively adjusted while the underground heat exchange of the buried pipe is enhanced. The application fields of the ground-source heat pump system as shallow geothermal energy in improvement and modification of environment-friendly buildings are developed, and then energy supply and carbon dioxide emission of the buildings are reduced.
Description
Technical field
The present invention relates to a kind of coupling salt water layer forced convertion well formula soil source heat pump system and operation method,
Belong to shallow layer geothermal energy and develop field and field of heating ventilation air conditioning.This technology can effectively alleviate soil source heat
Pump ground heat exchanger " heat short circuit ", " heat interference " phenomenon, solve Soil Thermal unbalance.Especially
Being applicable to shallow salt groundwater resource reserve enrich, the Circum-Bohai Sea of seasonal building hot and cold load proportion imbalance is low
Region of no relief.
Background technology
Soil source heat pump is to utilize the metastable characteristic of underground annual temperature, by buried in building
Heat exchanging pipe and heat pump around thing carry out heat exchange with interior of building, thus are reached for building
Refrigeration and the air conditioning system of heating, because it has, good stability, reliability be high, energy-efficient, Environmental Effect
The advantages such as benefit is good, application prospect is the most wide.But, along with soil source heat pump application region extension and
It uses the continuous expansion of scale, and Soil Thermal balance phenomenon gradually manifests.The maximum harm that Soil Thermal is unbalance
Being " the hot and cold accumulation " of pipe laying regional soil after longtime running, this can cause the soil moisture to be gradually deviated from
It is as original temperature during preferable cold and heat source, and present raise year by year (cooling is main area) or
Reduce (heating be main area) trend, thus cause the reduction of thermo-compression evaporation temperature or condensation temperature
Raise, eventually make running efficiency of system reduce and even deteriorate, thus lose what soil source heat pump was had
Power savings advantages.
At present, the Soil Thermal unbalance in soil source heat pump application and " heat short circuit ", " heat between pipe laying
Interference " the most gradually cause the attention of insider, for the non-equilibrium area of cooling and heating load, in succession propose
The measure of some regulation and control soil heat balances.In existing solution, increase pipe laying quantity, increase buried
Tube pitch etc. will result in the increase of initial investment and can only slow down soil moisture change, it is impossible to fundamentally solve
Certainly Soil Thermal unbalance, and it is not suitable for the use of China's cities and towns high density groups of building.Increase the sun
Energy heat collector is as auxiliary thermal source, or using cooling tower, cooling pond as supplemental heat rejected facility, is then increasing
While adding initial investment, causing system complexity to improve, operational reliability reduces.
The current soil source heat pump perpendicularly buried pipe degree of depth is at underground 60-120m, in this buried depth region, underground, I
State's Circum-Bohai Sea Lowland plain has the more rich saline groundwater resource of ratio, it is estimated that salt water resources gross reserves exists
2500×108m3.Investigating according to on-site land survey, underground water temperature is typically at 13-15 DEG C, and end circle buried depth is
40-160m, aquifer sand layer thickness is between 6-15m.Underground shallow layer salt water resources have reserves big, point
Cloth is wide, bury exploitation shallow, easy, feed the feature fast, energy consumption is low, sealing condition is good, meet for a long time,
Sustainable Exploitation, the standard of comprehensive utilization.Ground heat exchanger heat migration in water-bearing layer includes: convection current
Heat exchange, conduction of heat, thermal dispersion effect, wherein the coefficient of heat conduction is numerically several less than convection transfer rate
Even tens times again, and heat convection depends primarily on seepage flow speed in water-bearing layer with the change of thermal dispersion power
Degree.According to result of study, when groundwater velocity is 30m/y, the exchange capability of heat ratio of ground heat exchanger
In time without seepage flow, increases about 30%.Therefore, by abundant underground shallow layer salt water resources and soil source heat pump system
Combine, explore a kind of efficient, energy-conservation manifold type soil source heat pump system, lose as regulation and control Soil Thermal
The effective measures of weighing apparatus.Through retrieval disclosed Chinese patent literature, there is no the Patents literary composition of the direction
Part.
Summary of the invention
For the deficiency in existing soil source heat pump system, it is an object of the invention to provide a kind of coupling salt water
Layer forced convertion well formula soil source heat pump system and operation method, be beneficial to abundant Circum-Bohai Sea low plain
District's underground shallow layer salt water resources combines with soil source heat pump system, becomes and avoids ground heat exchanger " heat
Short circuit ", " heat interference ", the effective measures that regulation and control Soil Thermal is unbalance.Open up soil source heat pump system
As shallow layer geothermal energy application in green building lifting, transformation, and then reduce the energy of building
Supply and carbon dioxide emission reduction amount, the sustainable development to accelerating Bohai Rim is built with livable ecocity
If paces are the most significant.
For achieving the above object, the technical solution used in the present invention be to provide a kind of coupling salt water layer force right
Stream well formula soil source heat pump system, this soil source heat pump system acts on boundary's buried depth at the bottom of Circum-Bohai Sea Lowland plain
For the salt water layer of 40-160m reserves, and it is connected with heat user, wherein: this system includes heat pump machine
Group, ground heat exchanger, salt water layer pumped well, salt water layer inverted well, plate type heat exchanger, frequency conversion diving
Pump, buried tube side circulating pump, heat user side circulating pump, inverted well force (forcing) pump, inspection well, recharge water store up
Flow container, ground water temperature monitoring system, recharge infiltration sand pond, water temperature detection probe；Described source pump
User's side outlet is sequentially connected with user's water circulating pump, provides the heat user of air conditioner load to return to earth source heat pump machine
Group user side, constitutes source pump user side heat supply, cooling closed circuit；Described source pump buried
Heat exchange of heat pipe side outlet is sequentially connected with ground heat exchanger, buried tube side circulating pump, plate type heat exchanger, logical
Cross the first valve and return to earth source heat pump unit ground heat exchanger end, with constituting source pump source heat supply,
Cooling closed circuit；Described salt water layer pumped well is sequentially connected with variable-frequency diving pump, plate type heat exchanger, passes through
Recharge water fluid reservoir and desanding device return to inverted well, constitute salt water layer and take out, fill well closed circuit；Described
Pumped well and inverted well, at two ends, ground heat exchanger gang of wells region along salt water layer hydraulic gradient direction successively
Arrange, arrange in the loop and recharge force (forcing) pump, for preventing from recharging the accidents such as blocking or power failure, take out,
Inverted well function can be exchanged, and installs back pour water fluid reservoir and desanding device in loop, take out, simultaneously
Inverted well is equipped with and recharges infiltration sand pond.
There is provided a kind of simultaneously and utilize described coupling salt water layer forced convertion well formula soil source heat pump system
Operation method.
The effect of the present invention is to have the advantage that compared with conventional soil source heat pump system
1, make full use of the salt water resources of China's Circum-Bohai Sea Lowland plain underground shallow layer rich reserves, pass through
At two ends, ground heat exchanger gang of wells region, laying is taken out, is filled well, forms salt water blood circulation, causes salt water
Layer seepage flow solution generation forced convertion, strengthens underground pipe heat transfer intensity, it is to avoid " heat is short for buried tube heat exchanger
Road ", the generation of " heat interference " phenomenon, solve the seasonal Soil Thermal caused out of proportion of building load
Unbalance.
2, in salt water blood circulation, heat exchanger is increased, according to building air conditioning load variations feature, with ground
Circulation solution heat exchange in pipe laying, effectively regulates building load peak while strengthening pipe laying underground heat exchange.
3, in coupled system, increase only plate type heat exchanger and related accessories, required initial cost is relatively low,
And pipeline type of attachment is simple.Owing to salt water layer cyclic process strengthens underground pipe heat transfer intensity, can be effective
Reducing wellhole layout area, reduce ground heat exchanger wellhole quantity 30%, drilling depth can reduce 40%,
According to budget analysis, for identical building air conditioning load, initial cost can reduce 15%～25%, suitable
Soil source heat pump engineering that is newly-built for Circum-Bohai Sea Lowland plain or that transform.
4, introduce ground heat exchanger actual heat exchange amount Q and maximum heat exchange amount Q ' ratio, heat exchanger energy
Coefficient E is as ground heat exchanger heat transfer performance evaluation parameter for effect.Bury for current blanket underground
Deep 120m, 2U type DN25HDPE ground heat exchanger, ground source heat pump heat source side inlet/outlet
Temperature is 25 DEG C/30 DEG C under cooling condition；It is 7 DEG C/3 DEG C under heating condition.Analysis result shows: profit
By the coupling forced convertion well pattern of Circum-Bohai Sea Lowland plain underground shallow layer salt water resources, cooling in summer,
Winter heating's stage 2U type pipe is imported and exported the temperature difference and is all higher than imbedded pipe heat-exchanging pattern routinely, energy efficiency coefficient E
Respectively higher than the latter 25.1%, 20.8%.Due in salt water layer exist force flow event, heat exchanger with
The heat transfer of its place rock-soil layer is the heat convection under thermograde and hydrodynamic gradient act on jointly, heat
The diabatic process that intercouples with thermal dispersion effect of conduction, can effectively, go out gang of wells by Heat Migration in time
Around, alleviating rock-soil layer hot stack, final raising is embedded in the exchange capability of heat of underground pipe in salt water layer.
The present invention, with low initial cost, low operation energy consumption and simple system type of attachment, makes full use of ring Bohai Sea
Lowland plain, sea shallow salt groundwater resource, combines with soil source heat pump system, becomes and avoid underground pipe heat exchange
Device " heat short circuit ", " heat interference ", the effective measures that regulation and control Soil Thermal is unbalance.Open up soil source heat
Pumping system as shallow layer geothermal energy green building promote, transformation in application, and then reduce building
Energy supply and carbon dioxide emission reduction amount, to sustainable development and the livable ecology of accelerating Bohai Rim
Urban construction paces are the most significant.
Accompanying drawing explanation
Fig. 1 is that the present invention couples salt water layer forced convertion well formula soil source heat pump system figure；
Fig. 2 is that the present invention couples salt water layer forced convertion well formula soil source heat pump well casing layout drawing.
In figure:
1, heat user 2, source pump 3, ground heat exchanger gang of wells 4, pumped well 5, inverted well
6, plate type heat exchanger 7, variable-frequency diving pump 8, buried tube side circulating pump 9, heat user side circulating pump
10, inverted well force (forcing) pump 11, heat exchanger underground pipe circulation fluid the first valve
12, well water the first valve is taken out-filled to heat exchanger underground pipe circulation fluid the second valve 13, heat exchanger
14, well water the second valve 15, salt water layer 16, clay aquiclude are taken out-filled to heat exchanger
17, inspection well 18, recharge water fluid reservoir and desanding device 19, level of ground water, water temperature monitoring
System 20, take out filling well system the first valve 21, take out filling well system the second valve
22, take out filling well system the 3rd valve 23, take out filling well system the 4th valve
24, infiltration sand pond 25, water temperature detection probe are recharged
Detailed description of the invention
In conjunction with accompanying drawing to the coupling salt water layer forced convertion well formula soil source heat pump system of the present invention and operation
Method is illustrated.
The coupling salt water layer forced convertion well formula soil source heat pump system of the present invention and operation method design are thought
Increase the salt water layer circulation of Bohai Rim on the basis of wanting to be based on conventional soil source heat pump system, change
Hot systems and adnexa thereof, according to building air conditioning load characteristic and the ground heat exchanger region soil moisture
Change, plurality of operating modes can be realized.
The coupling salt water layer forced convertion well formula soil source heat pump system of the present invention, this soil source heat pump system
Act on the salt water layer that boundary's buried depth at the bottom of Circum-Bohai Sea Lowland plain is 40-160m reserves, and with heat user 1
Being connected, this system includes source pump 2, ground heat exchanger 3, salt water layer pumped well 4, salty
Water layer inverted well 5, plate type heat exchanger 6, variable-frequency diving pump 7, buried tube side circulating pump 8, heat user side
Circulating pump 9, inverted well force (forcing) pump 10, inspection well 17, recharge water fluid reservoir 18, ground water temperature monitor
System 19, recharge infiltration sand pond 24, water temperature detection probe 25；The user side of described source pump 2 goes out
Mouth is sequentially connected with user's water circulating pump 9, provides the heat user 1 of air conditioner load to return to earth source heat pump unit 2
User side, constitutes source pump user side heat supply, cooling closed circuit；Described source pump 2 buried
Heat exchange of heat pipe side outlet is sequentially connected with ground heat exchanger 3, buried tube side circulating pump 8, plate type heat exchanger
6, return to earth source heat pump unit 2 ground heat exchanger end by the first valve 11, constitute source pump ground
Source heat supply, cooling closed circuit；Described salt water layer pumped well 4 is sequentially connected with variable-frequency diving pump 7, plate
Formula heat exchanger 6, returns to inverted well 5 by recharge water fluid reservoir and desanding device 18, constitute salt water layer take out,
Fill well closed circuit；Described pumped well 4 and inverted well 5, at two ends, ground heat exchanger gang of wells 3 region
It is sequentially arranged along salt water layer hydraulic gradient direction, arranges in the loop and recharge force (forcing) pump 10, for anti-non-return
Fill blocking or the accident such as power failure, take out, inverted well function can be exchanged, and loop installs back
Pour water fluid reservoir and desanding device 18, take out, inverted well is equipped with and recharges infiltration sand pond 24 simultaneously.
Ground heat exchanger gang of wells 3 region inside lay observation wellhole 17, observation wellhole 17 and
Pumped well 4 is internal with inverted well 5 is respectively provided with temperature probe 25.
The operation method of the coupling salt water layer forced convertion well formula soil source heat pump system described in utilization, the party
Method comprises the following steps:
In cooling and heating initial operating stage and latter stage, close salt water layer and take out, fill well closed circuit, open heat
First valve 11 in pump assembly ground source heat supply, cooling closed circuit, closes the second valve 12 in loop circuit,
System is run as conventional single soil source heat pump.
Ground heat exchanger gang of wells 3 place in temperature probe 25 monitors soil source heat pump running
When the soil moisture occurs more than or less than the change of initial temperature 1 DEG C, open salt water layer and take out, fill and loop back
Road, at pumped well variable-frequency diving pump 7 with under the effect recharging force (forcing) pump 10, opens heat exchanger and takes out-fill well
Water the first valve 13, closes heat exchanger and takes out-fill well water the second valve 14, make salt water layer forced convertion occur；
At cooling with under confession thermal condition, the inlet/outlet temperature difference of ground heat exchanger gang of wells 3 is respectively smaller than 5
DEG C, 4 DEG C time, open heat exchanger and take out-fill well water the second valve 14 and heat exchanger underground pipe circulation fluid second
Valve 12, closes heat exchanger and takes out-fill well water the first valve 13 and heat exchanger underground pipe circulation fluid the first valve
11, at pumped well variable-frequency diving pump 7 with under the effect recharging force (forcing) pump 10, saline groundwater enters heat exchange
Device 6 and circulation solution heat exchange in ground heat exchanger gang of wells 3.
Coupling salt water layer forced convertion well formula soil source heat pump well casing layout drawing as shown in Figure 2, buried
Heat exchange of heat pipe gang of wells 3 layout area two ends, are sequentially arranged pumped well along salt water layer 15 hydraulic gradient direction
4 with inverted well 5, pumped well 4, the hole diameter of inverted well 5, well depth and 15, the salt water layer utilized
Determine according to on-site land survey result；Take out, recharge total Water and pumped well 4, inverted well 5 ratio and between
Distance determines, for Circum-Bohai Sea region of no relief salt water layer water according to on-the-spot bailing test and building air conditioning load
Literary composition geologic feature, it is proposed that pumped well 4, inverted well 5 ratio are more than 1:3.System uses to add and pushes back the same period
Filling pattern, arranges in the loop and recharges force (forcing) pump 10, for preventing from recharging the burst things such as blocking or power failure
Part, takes out, inverted well function can be exchanged, and installs back pour water fluid reservoir and desanding device in loop
18, take out simultaneously, inverted well be equipped with recharge infiltration sand pond 24, recharge as the auxiliary side of recharging using gravity
Formula.Lay observation wellhole 17 in ground heat exchanger gang of wells region, temperature probe 25 is set, works as monitoring
When change occurs in the ground heat exchanger place soil moisture in soil source heat pump running, open salt water
Layer is taken out, is filled blood circulation, at pumped well variable-frequency diving pump 7 with under the effect recharging force (forcing) pump 10, makes
There is forced convertion in salt water layer, increases heat convection ability, improves ground heat exchanger system operational efficiency,
Eliminate ground heat exchanger " heat short circuit ", " heat interference ", it is to avoid hot and cold accumulation occurs in soil.
Coupling salt water layer forced convertion well formula soil source heat pump system figure as shown in Figure 1.Soil source heat pump
In heat supply, cooling mode: in heat pump heat supply and latter stage in cooling stage, close saline groundwater and take out, fill
Well variable-frequency diving pump 7 with recharge heat exchanger in force (forcing) pump 10 and loop take out-fill well water the first valve 13,
Well water the second valve 14, isolated operation soil source heat pump system are taken out-filled to heat exchanger.Circulation solution is by burying
It is located at the ground heat exchanger of clay aquiclude 16 and salt water layer 15 after soil heat exchange, passes through underground pipe
Side circulating pump 8 and heat exchanger underground pipe circulation fluid the first valve 11 enter source pump 2 carry out refrigeration with
Heat, return to ground heat exchanger gang of wells 3, constitute heat supply, cooling closed circuit, by heat user side
Circulating pump 9 provides air conditioner load for heat user 1.Due at heat supply and latter stage in cooling stage, building air conditioning
Load is relatively low, and underground pipe heat exchange can individually undertake exchange capability of heat completely.Using soil source heat pump as one
Using underground as storage body across season underground energy-accumulation with release can system, normally transport in the system that do not affects
On the premise of row, in the soil of buried tube heat exchanger place, suitably store certain " cold " and " heat ",
At next cooling and initial stage in heat supply stage, rock-soil layer temperature is molten higher than circulating in original state, with pipe laying
Liquid temperature difference increases, thus enhances this stage heat exchanging capability of buried tube.
The coupling salt water layer forced convertion well formula soil source heat pump system of the present invention and operation method, fully profit
By Circum-Bohai Sea Lowland plain underground shallow layer temperature at 13-15 DEG C, end circle buried depth is 40-160m, aqueous sand
Layer thickness between 6-15m distinctive rich reserves, take out and fill salt water resources easily, exploitation devises this
Coupling salt water layer forced convertion well formula soil source heat pump system, including following three kinds of independent operational modes:
1, coupling salt water layer forced convertion well soil source heat pump heat supply, cooling mode: transport at heat pump
Between the departure date, monitor ground heat exchanger gang of wells 4 exist by being arranged on temperature probe in observation wellhole 17
Heat supply and cooling stage, the place soil moisture occurs declining and rising, opens salt water layer pumped well frequency conversion and dive
Water pump 7, opens heat exchanger and takes out-fill well water the first valve 11, closes heat exchanger and takes out-fill well water the second valve
12.Taken out by saline groundwater, fill circulation, strengthen percolation flow velocity in salt water layer, utilize salt water to circulate
Improve the buried tube heat exchanger gang of wells 4 heat convection ability in salt water layer, eliminate hot and cold accumulation.
2, coupling salt water layer forced convertion well heat exchange soil source heat pump heat supply, cooling mode: at building sky
Adjust load is close, reach run peak value time, open heat exchanger and take out-fill well water the second valve 12, closedown is changed
Well water the first valve 11 is taken out-filled to hot device, and saline groundwater enters heat exchanger 6 and changes with circulation solution in underground pipe
Heat, effectively regulates building load peak while strengthening pipe laying underground heat exchange.Currently, under cooling condition,
Ground source heat pump 2 heat source side inlet/outlet temperature is usually 25 DEG C-30 DEG C；Under heating condition, soil
Source source pump 2 heat source side inlet/outlet temperature is usually 7 DEG C-3 DEG C.But saline groundwater temperature is maintained at
About 13-15 DEG C, therefore all can be effectively improved or be lowered into heat pump in cooling condition heating
Unit circulation solution temperature, improves the operational efficiency of unit.For current blanket underground buried depth
120m, 2U type DN25HDPE ground heat exchanger, for identical building air conditioning load, uses coupling
Close salt water layer forced convertion well heat exchange soil source heat pump heat supply, cooling mode, according to computational analysis, fully
Utilize Circum-Bohai Sea Lowland plain shallow salt groundwater resource, can effectively reduce wellhole layout area, reduce buried
Heat exchange of heat pipe wellhole quantity 30%, drilling depth can reduce 40%, and initial cost can reduce 15%～25%.
Import and export the temperature difference be all higher than imbedded pipe heat-exchanging pattern routinely at cooling in summer, winter heating's stage 2U type pipe,
Energy efficiency coefficient E is respectively higher than conventional single soil source heat pump 25.1%, 20.8%.It is applicable to Circum-Bohai Sea low
Region of no relief newly-built or transformation soil source heat pump engineering.
3, soil source heat pump heat supply, cooling mode: in heat supply and latter stage in cooling stage, close underground salty
Water is taken out, is filled well circulation, isolated operation soil source heat pump system.In heat supply and latter stage in cooling stage, building
Air conditioner load is relatively low, and underground pipe heat exchange can individually undertake exchange capability of heat completely.Meanwhile, fully take into account
Underground is to have accumulation of energy function " storage body " rather than simple " low-temperature receiver " or " thermal source ", soil
Source heat pump a kind of using underground as storage body across season underground energy-accumulation with release can system.
Therefore, in heat supply and latter stage in cooling stage, on the premise of the system that do not affects is properly functioning, suitably burying
Heat exchange of heat pipe gang of wells place soil stores certain " cold " and " heat ", next cooling with
At the initial stage in heat supply stage, the temperature difference between circulation solution and soil in buried tube heat exchanger gang of wells can be increased,
Improve unit operation efficiency.
Claims (3)
1. a coupling salt water layer forced convertion well formula soil source heat pump system, this soil source heat pump system
Act on the salt water layer that boundary's buried depth at the bottom of Circum-Bohai Sea Lowland plain is 40-160m, and with heat user (1) phase
Connect, it is characterized in that: this system includes source pump (2), ground heat exchanger (3), salt water
Layer pumped well (4), salt water layer inverted well (5), plate type heat exchanger (6), variable-frequency diving pump (7),
Buried tube side circulating pump (8), heat user side circulating pump (9), inverted well force (forcing) pump (10), observation
Well (17), recharge water fluid reservoir (18), ground water temperature monitoring system (19), recharge infiltration sand pond
(24), water temperature detection probe (25)；User's side outlet of described source pump (2) is sequentially connected with
User's water circulating pump (9), the heat user (1) of offer air conditioner load return to earth source heat pump unit (2)
User side, constitutes source pump user side heat supply, cooling closed circuit；Described source pump (2)
Ground heat exchanger side outlet be sequentially connected with ground heat exchanger (3), buried tube side circulating pump (8),
Plate type heat exchanger (6), returns to earth source heat pump unit (2) underground pipe heat exchange by the first valve (11)
Device end, constitutes source pump ground source heat supply, cooling closed circuit；Described salt water layer pumped well (4)
It is sequentially connected with variable-frequency diving pump (7), plate type heat exchanger (6), is filled by recharge water fluid reservoir and desanding
Put (18) and return to inverted well (5), constitute salt water layer and take out, fill well closed circuit；Described pumped well (4)
With inverted well (5), at ground heat exchanger gang of wells (3) two ends, region along salt water layer hydraulic gradient direction
It is sequentially arranged, arranges in the loop and recharge force (forcing) pump (10), prominent for preventing from recharging blocking or power failure etc.
The event of sending out, takes out, inverted well function can be exchanged, and installs back pour water fluid reservoir and desanding dress in loop
Put (18), take out simultaneously, inverted well be equipped with recharge infiltration sand pond (24).
Coupling salt water layer forced convertion well formula soil source heat pump system the most according to claim 1,
It is characterized in that: lay observation wellhole (17) in the inside in ground heat exchanger gang of wells (3) region,
Observation wellhole (17) and pumped well (4) are respectively provided with temperature probe (25) with inverted well (5) inside.
Coupling the most according to claim 1 and 2 salt water layer forced convertion well formula soil source heat pump system
System and operation method, is characterized in that: the method comprises the following steps:
In cooling and heating initial operating stage and latter stage, close salt water layer and take out, fill well closed circuit, open heat
First valve (11) in pump assembly ground source heat supply, cooling closed circuit, closes the second valve in loop circuit
(12), system is run as conventional single soil source heat pump；
When temperature probe (25) monitors ground heat exchanger gang of wells (3) in soil source heat pump running
When the change more than or less than initial temperature 1 DEG C occurs in the place soil moisture, open salt water layer and take out, fill and follow
Loop back path, at pumped well variable-frequency diving pump (7) with under the effect recharging force (forcing) pump (10), opens and changes
Well water the first valve (13) is taken out-filled to hot device, closes heat exchanger and takes out-fill well water the second valve (14), makes
There is forced convertion in salt water layer；
At cooling with under confession thermal condition, the inlet/outlet temperature difference of ground heat exchanger gang of wells (3) is respectively smaller than
5 DEG C, 4 DEG C time, open heat exchanger and take out-fill well water the second valve (14) and heat exchanger underground pipe circulation fluid
Second valve (12), cut out heat exchanger takes out-fills well water the first valve (13) and follows with heat exchanger underground pipe
Ring liquid the first valve (11), at pumped well variable-frequency diving pump (7) and the work recharging force (forcing) pump (10)
Under with, saline groundwater enters plate type heat exchanger (6) and circulation solution in ground heat exchanger gang of wells (3)
Heat exchange.
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| CN108469085A (en) * | 2018-03-22 | 2018-08-31 | 西安交通大学 | A kind of earth source heat pump all fresh air air-conditioning system based on the storage of shallow-layer heat |
| CN108800664A (en) * | 2017-04-27 | 2018-11-13 | 华东交通大学 | A kind of efficient freezer based on ground source technology and dry library hybrid system |
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| CN109827348A (en) * | 2018-12-29 | 2019-05-31 | 天津城建大学 | Middle-shallow layer geothermal energy comprehensive application system and the method for operation based on building energy supply |
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