CN1743758A - Reinforced heat exchange method and apparatus for geothermal pump under ground heat exchanger - Google Patents

Reinforced heat exchange method and apparatus for geothermal pump under ground heat exchanger Download PDF

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Publication number
CN1743758A
CN1743758A CN 200410060489 CN200410060489A CN1743758A CN 1743758 A CN1743758 A CN 1743758A CN 200410060489 CN200410060489 CN 200410060489 CN 200410060489 A CN200410060489 A CN 200410060489A CN 1743758 A CN1743758 A CN 1743758A
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China
Prior art keywords
heat exchanger
soil
water
water filling
setting value
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Granted
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CN 200410060489
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Chinese (zh)
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CN100513928C (en
Inventor
孙洲阳
周泽
饶荣水
肖建军
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Henan Xinfei Electric Group Co Ltd
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Henan Xinfei Electric Group Co Ltd
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Priority to CNB2004100604898A priority Critical patent/CN100513928C/en
Publication of CN1743758A publication Critical patent/CN1743758A/en
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Publication of CN100513928C publication Critical patent/CN100513928C/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/10Geothermal energy

Abstract

This invention discloses a forced heat exchange method and device for underground heat exchanger of earth source heat pump, which contains buried pipe system, soil humidity and temperature sensor, water filling pressuring storage system and control circuit. Said invention is filled water to soil around the underground heat exchanger by detecting the soil temperature and humidity when in summer the detected temperature higher than preset value and humidity lower than preset value, and in winter the detected the soil temperature lower then preset value.

Description

The strengthened heat exchange method of subterranean heat exchanger of earth source heat pump and device thereof
Technical field
The present invention relates to a kind of subterranean heat exchanger of earth source heat pump heat exchange intensifying method, also relate to a kind of device that uses this method simultaneously, belong to the integrated application of geothermal energy and automatic control technology at field of heating ventilation air conditioning.
Background technology
Earth source heat pump is to be the technology that thermal source carries out air conditioning to building with the earth, goes for dwelling house and commercial building, both can be installed in the new building, also can use in existing building, and it is a kind of building energy conservation new technology of sustainable development.It is worked in natural environment, and cleaning, effective and energy-conservation heat and cold air are provided, and is a kind of high efficiency technical that has been verified.Because it has advantages of energy saving and environmental protection, come into one's own day by day and promote, become on the market the most reliable and the most competitive heating/cooling system soon, more competitive than other energy resource system.USDOE and Environmental Protection Department all approved earth-source hot-pump system be at present all refrigeration, heat with water-heater system in the most effective, environmental protection a kind of.According to portion report in 1993, Environmental Protection Agency pointed out that ground source heat pump technology mainly can reduce consumption and the pollution to natural resources, more comfortable concerning giving owner user simultaneously, reliable and saving.Reduce waste discharge thereby can save natural resources, utilize ground circuit to conduct heat, thereby avoided outside drain and air pollution by effective water and soil weather control.The soil heat source heat pump is just authorized in the ASHRAE technology prize of U.S. HVAC SE in 1998, and USDOE's promulgation rules in 1998 require to apply underground coupling heat pump heat supplying air conditioning system in the building of national Federal Agency.
Earth-source hot-pump system is to flow the heat transfer between realization system and the earth by circulation fluid (water or be the anti-icing fluid of main component with water) in the sealing underground buried tube.In the heat supplying process, fluid takes heat to indoor by system from underground collection heat more in the winter time.System's antikinesis when freeze summer promptly from the indoor heat of taking away, is delivered to heat in the underground ground by system again.Therefore, underground coupling heat pump system has kept the underground water heat pump to utilize the advantage of the earth as Cooling and Heat Source, does not need groundwater abstraction as the medium that conducts heat simultaneously again.
Ground source heat pump technology also has many practical problems to need research, as non-harmful environment-friendly high-efficiency cold-producing medium problem, key technologies such as the heat exchange reinforcement of ground heat exchanger as a kind of environmental protection and energy saving technology.Because the hot moisture performance of soil is bigger to the influence of earth-source hot-pump system, the relating to parameters such as solid particle composition, water content (rate) and heat conductivility of the main and soil of the thermal characteristics of soil; When the closed loop earth source heat pump when cooling condition moves, may cause the rising of underground buried tube environment temperature, antecedent soil moisture and antecedent soil moisture to shrink making and coil pipe between form the gap, cause that thermal resistance increases between pipeline and the soil; Under heating condition, may cause underground buried tube surrounding soil Yin Wendu to descend and freeze, form soil, may cause serious consequences such as pipe breakage, liquid in pipe leakage when serious because freeze pipe laying is formed the extruding phenomenon
Summary of the invention
Reliable efficient move the provide a kind of possible technique scheme of a kind of strengthened heat exchange method of ground source heat heat exchange pump ground heat exchanger for earth source heat pump is provided, uses with middle part and the northern area that is applicable to cold in winter.
Simultaneously, the present invention also aims to provide a kind of device that uses this method, used with middle part and the northern area that is applicable to cold in winter.
In order to finish the foregoing invention purpose, overall technological scheme of the present invention is by a kind of strengthened heat exchange method of ground source heat heat exchange pump ground heat exchanger, by detecting the soil temperature and humidity around the ground heat exchanger pipeline, when meeting the following conditions, to the water filling of ground heat exchanger pipeline surrounding soil:
(1) in summer, when the detected soil moisture is higher than setting value or soil moisture less than when setting value;
(2) in the winter time, when the detected soil moisture is lower than setting value.
Simultaneously, corresponding with said method, the present invention has adopted the reinforced heat exchanger of subterranean heat exchanger of earth source heat pump, this device comprises with the ground heat exchanger pipeline accompanies the auxilliary pipe laying system that establishes of burying, the soil temperature and humidity sensor of laying in the soil of ground heat exchanger pipeline through the place, water filling pressurization water storage system and water filling pressurized control circuit, wherein water filling pressurization water storage system is connected by the water inlet of a control element and whole pipe laying system, each soil temperature and humidity sensor links to each other by the signal input part of signal transmission wire with water filling pressurized control circuit, the control output of water filling pressurized control circuit links to each other with above-mentioned control element, water filling pressurized control circuit is higher than setting value in the temperature that detects soil, when soil moisture is lower than setting value or soil moisture lowland setting value, make the control element action pass through the moisturizing in soil of pipe laying system by water filling pressurization water storage system.
Described control element can be electromagnetism water valve or pressure pump.
Described water filling pressurization water storage system is a servo water tank, and this servo water tank adds water level or hydraulic control device.
Described pipe laying cloth is embedded in the pipe well central authorities of ground heat exchanger pipeline.
Described soil temperature and humidity sensor be laid in around the lateral wall at perpendicularly buried pipe differing heights place and the pipe outer wall of horizontal coiled pipe along each position that level is moved towards.
The inlet of described control element can connect auxiliary heater.
The strengthened heat exchange method and the device of ground source heat heat exchange pump ground heat exchanger of the present invention are by detecting the soil temperature and humidity around the ground heat exchanger pipeline, in summer, when the detected soil moisture is higher than setting value or soil moisture less than setting value; In the winter time, be lower than when setting value when meeting the following conditions, when the detected soil moisture to the water filling of ground heat exchanger pipeline surrounding soil.When the closed loop earth source heat pump when cooling condition moves, can effectively avoid the rising of underground buried tube environment temperature, antecedent soil moisture and antecedent soil moisture to shrink, make between coil pipe and the soil and can not form the gap, guaranteed the normal thermal resistance between pipeline and the soil; Under heating condition, can effectively avoid underground buried tube surrounding soil Yin Wendu to descend and freeze, prevent soil because freeze pipe laying is formed the generation of serious consequences such as pipe breakage that extruding may cause, liquid in pipe leakage.As seen, the present invention has great importance for the reliable normal operation that guarantees HVAC.
Description of drawings
Fig. 1 is the annexation figure of apparatus of the present invention.
The specific embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
The reinforced heat exchanger of the subterranean heat exchanger of earth source heat pump that the present invention adopts, as Fig. 1 annexation figure of the present invention, this device contains evaporimeter 1, condenser 3, expansion valve 2, refrigeration compressor 8, four-way change-over valve 6, warm washing water's water storage box 7 and water circulating pump 4.The key of this device is to bury the auxilliary pipe laying system 13 that is provided with ground heat exchanger pipeline 12 companions, in the soil at ground heat exchanger pipeline process place, lay soil temperature and humidity sensor 14 simultaneously, set up water filling pressurization water storage system and water filling pressurized control circuit 5, wherein water filling pressurization water storage system is connected by the water inlet of a control element and whole pipe laying system 13, each soil temperature and humidity sensor 14 links to each other with the signal input part of water filling pressurized control circuit 5 by signal transmission wire 11, the control output of water filling pressurized control circuit 5 links to each other with above-mentioned control element, water filling pressurized control circuit 5 is higher than setting value in the temperature that detects soil, when soil moisture is lower than setting value or soil moisture lowland setting value, make the control element action pass through pipe laying system 13 moisturizing in soil by water filling pressurization water storage system.The control element of present embodiment is pressure pump 10 (also can be the electromagnetism water valve).Above-mentioned water filling pressurization water storage system is a servo water tank 9, and servo water tank adds water-level control apparatus.The pipe laying cloth of pipe laying system 13 is embedded in the pipe well central authorities of ground heat exchanger pipeline 12, i.e. two or four ground heat exchanger pipelines 12 centres.Soil temperature and humidity sensor 14 is laid in around the lateral wall that vertically descends heat exchange manifold 12 differing heights places and flatly descend pipe outer wall that heat exchange manifold 12 buries along each position that level is moved towards.The inlet of control element can connect auxiliary heater, as boiler, solar water heater etc.
In summer, heat pump carries out refrigerating operaton on the ground, by underground ground heat exchanger pipeline 12 to the soil heat release, it is xeothermic that surrounding soil will become, the temperature-humidity signal that soil temperature and humidity sensor 14 is collected is by being embedded in the signal transmission wire 11 in the soil, pass the signal to water filling pressurized control circuit 5, whether water filling pressurized control circuit 5 supplies water to pipe laying system 13 according to setting value decision pressure pump 10, thereby guarantees that underground ground heat exchanger pipeline 12 surrounding soils have suitable humiture.Avoid forming the gap, cause thermal resistance increase between ground heat exchanger pipeline 12 and the soil, thereby cause heat pump COP value to descend because of antecedent soil moisture shrinks may make between soil and the ground heat exchanger pipeline 12.
In the winter time, heat pump carries out heating operation, hot by ground heat exchanger pipeline 12 to the soil heat absorption, make the soil moisture around the ground heat exchanger pipeline 12 constantly reduce, the temperature-humidity signal that soil temperature and humidity sensor 14 is collected is by being embedded in the signal transmission wire 11 in the soil, pass the signal to water filling pressurized control circuit 5, whether water filling pressurized control circuit 5 supplies water to pipe laying system 13 according to setting value decision pressure pump 10, thereby guarantees that ground heat exchanger pipeline 12 surrounding soils have suitable humiture.Avoid to cause ground heat exchanger pipeline 12 surrounding soil Yin Wendu to descend and freeze, form soil because freeze underground heat exchange manifold 12 is formed the extruding phenomenon, may cause serious consequences such as ground heat exchanger pipeline 12 breaks, liquid in pipe leakage when serious.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (7)

1, a kind of strengthened heat exchange method of subterranean heat exchanger of earth source heat pump is characterized in that: by detecting the soil temperature and humidity around the ground heat exchanger pipeline, when meeting the following conditions, to the water filling of ground heat exchanger pipeline surrounding soil:
(1) in summer, when the detected soil moisture is higher than setting value or soil moisture less than when setting value;
(2) in the winter time, when the detected soil moisture is lower than setting value.
2, a kind of reinforced heat exchanger of subterranean heat exchanger of earth source heat pump, it is characterized in that: this device comprises with the ground heat exchanger pipeline accompanies the auxilliary pipe laying system that establishes of burying, the soil temperature and humidity sensor of laying in the soil of ground heat exchanger pipeline through the place, water filling pressurization water storage system and water filling pressurized control circuit, wherein water filling pressurization water storage system is connected by the water inlet of a control element and whole companion's pipe laying system, each soil temperature and humidity sensor links to each other by the signal input part of signal transmission wire with water filling pressurized control circuit, the control output of water filling pressurized control circuit links to each other with above-mentioned control element, water filling pressurized control circuit is higher than setting value in the temperature that detects soil, when soil moisture is lower than setting value or soil moisture lowland setting value, make the control element action pass through the moisturizing in soil of pipe laying system by water filling pressurization water storage system.
3, the reinforced heat exchanger of subterranean heat exchanger of earth source heat pump according to claim 2 is characterized in that: described control element can be electromagnetism water valve or pressure pump.
4, according to the reinforced heat exchanger of claim 2 or 3 described subterranean heat exchanger of earth source heat pump, it is characterized in that: described water filling pressurization water storage system is a servo water tank, and this servo water tank adds water level or hydraulic control device.
5, the reinforced heat exchanger of subterranean heat exchanger of earth source heat pump according to claim 2 is characterized in that: described pipe laying cloth is embedded in the pipe well central authorities of ground heat exchanger pipeline.
6, the reinforced heat exchanger of subterranean heat exchanger of earth source heat pump according to claim 2 is characterized in that: the pipe outer wall that described soil temperature and humidity sensor is laid in around the lateral wall at perpendicularly buried pipe differing heights place and horizontal coiled pipe buries is along each position that level is moved towards.
7, the reinforced heat exchanger of subterranean heat exchanger of earth source heat pump according to claim 2 is characterized in that: the inlet of described control element can connect auxiliary heater.
CNB2004100604898A 2004-09-02 2004-09-02 Reinforced heat exchange method and apparatus for geothermal pump under ground heat exchanger Expired - Fee Related CN100513928C (en)

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Application Number Priority Date Filing Date Title
CNB2004100604898A CN100513928C (en) 2004-09-02 2004-09-02 Reinforced heat exchange method and apparatus for geothermal pump under ground heat exchanger

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CN100513928C CN100513928C (en) 2009-07-15

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101916094A (en) * 2010-07-28 2010-12-15 南京工业大学 Ground source heat pump early warning controller and control method thereof
CN101636624B (en) * 2007-01-18 2011-09-07 地天系统有限公司 Multi-faceted designs for a direct exchange geothermal heating/cooling system
CN102608294A (en) * 2012-03-29 2012-07-25 上海化工研究院 Temperature difference transpiration type soil composition leaching testing device
CN101588701B (en) * 2008-05-23 2012-08-08 华为技术有限公司 Temperature control method and temperature control system of machine cabinet
CN103062820A (en) * 2012-12-27 2013-04-24 陕西盛田能源服务有限公司 Ground-source heat pump and solar energy united thermal storage heating system
CN103822404A (en) * 2014-03-04 2014-05-28 湖南工业大学 Device and method for improving performance of ground heat exchanger
CN106556168A (en) * 2016-12-06 2017-04-05 青海聚正新能源有限公司 Solar cross-season underground cold-storage thermal
CN106766378A (en) * 2016-12-05 2017-05-31 青海聚正新能源有限公司 Across the season soil energy storage equipment of earth source heat pump

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101636624B (en) * 2007-01-18 2011-09-07 地天系统有限公司 Multi-faceted designs for a direct exchange geothermal heating/cooling system
CN101588701B (en) * 2008-05-23 2012-08-08 华为技术有限公司 Temperature control method and temperature control system of machine cabinet
CN101916094A (en) * 2010-07-28 2010-12-15 南京工业大学 Ground source heat pump early warning controller and control method thereof
CN102608294A (en) * 2012-03-29 2012-07-25 上海化工研究院 Temperature difference transpiration type soil composition leaching testing device
CN102608294B (en) * 2012-03-29 2015-01-28 上海化工研究院 Temperature difference transpiration type soil composition leaching testing device
CN103062820A (en) * 2012-12-27 2013-04-24 陕西盛田能源服务有限公司 Ground-source heat pump and solar energy united thermal storage heating system
CN103822404A (en) * 2014-03-04 2014-05-28 湖南工业大学 Device and method for improving performance of ground heat exchanger
CN103822404B (en) * 2014-03-04 2016-09-28 湖南工业大学 A kind of device and method improving ground heat exchanger performance
CN106766378A (en) * 2016-12-05 2017-05-31 青海聚正新能源有限公司 Across the season soil energy storage equipment of earth source heat pump
CN106556168A (en) * 2016-12-06 2017-04-05 青海聚正新能源有限公司 Solar cross-season underground cold-storage thermal

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