EP2914910A1 - Puits unique d'accumulation et d'échange thermique destiné à une collecte d'énergie terrestre - Google Patents

Puits unique d'accumulation et d'échange thermique destiné à une collecte d'énergie terrestre

Info

Publication number
EP2914910A1
EP2914910A1 EP13850425.3A EP13850425A EP2914910A1 EP 2914910 A1 EP2914910 A1 EP 2914910A1 EP 13850425 A EP13850425 A EP 13850425A EP 2914910 A1 EP2914910 A1 EP 2914910A1
Authority
EP
European Patent Office
Prior art keywords
heat
working fluid
insulated tube
heat exchanging
particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13850425.3A
Other languages
German (de)
English (en)
Other versions
EP2914910A4 (fr
Inventor
Sheng Heng XU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heng Sheng Investment Holdings Ltd LLC
Original Assignee
Heng Sheng Investment Holdings Ltd LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heng Sheng Investment Holdings Ltd LLC filed Critical Heng Sheng Investment Holdings Ltd LLC
Publication of EP2914910A1 publication Critical patent/EP2914910A1/fr
Publication of EP2914910A4 publication Critical patent/EP2914910A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
    • F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
    • F24T10/17—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using tubes closed at one end, i.e. return-type tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T10/30—Geothermal collectors using underground reservoirs for accumulating working fluids or intermediate fluids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the disclosure generally relates to the field of energy harvesting systems, and particularly to a method and system for harvesting ground energy.
  • a ground-coupled heat exchanger is an underground heat exchanger that can capture heat from and/or dissipate heat to the ground. Technologies such as buried pipes/tubes are commonly utilized to facilitate the heat exchange. However, traditional buried pipes/tubes technology is poorly efficient in energy collection and highly demanding in land occupation, therefore it is hard to achieve wide-spread application.
  • the present disclosure is directed to an underground heat transferring system.
  • the system includes a water-blocking heat- exchanging outer wall defining an enclosure and an insulated tube located inside the enclosure.
  • the insulated tube defines a perforated portion at the bottom.
  • Multiple heat exchanging particles are disposed between the outer wall and the insulated tube.
  • the system also includes an inlet that is configured for receiving a working fluid and directing the working fluid to flow through the heat exchanging particles towards the bottom of the enclosure.
  • a pump located inside the insulated tube is configured for pumping the working fluid collected at the bottom of the insulated tube.
  • An exhalant siphon fluidly connected to the pump inside the insulated tube is configured for delivering the working fluid out of the underground heat transferring system.
  • a further embodiment of the present disclosure is also directed to a heat transferring method.
  • the method includes: directing a working fluid to flow through a plurality of heat exchanging particles disposed between a water-blocking heat-exchanging outer wall and an insulated inner tube; collecting the working fluid at the bottom of the inner tube; and pumping the collected working fluid through an exhalant siphon to deliver the working fluid.
  • An additional embodiment of the present disclosure is directed to an underground heat transferring method.
  • the method includes: a) directing a working fluid to flow through a plurality of heat exchanging particles disposed between a water-blocking heat-exchanging outer wall and an insulated inner tube; b) collecting the working fluid at the bottom of the inner tube; c) pumping the collected working fluid through an exhalant siphon located inside the insulated tube to deliver the working fluid to a heat consuming device; and d) receiving the working fluid returned from the heat consuming device and repeating step a).
  • FIG. 1 is a side elevation cross-sectional view of the heat exchanging and accumulating single well system for ground energy collection in accordance with the present disclosure
  • FIG. 2 is another side elevation cross-sectional view of the heat exchanging and accumulating single well system of FIG. 1 ;
  • FIG. 3 is a top view of the heat exchanging and accumulating particles
  • FIG. 4 is an illustration depicting the insulated tube and its perforated portion
  • FIG. 5 is an illustration depicting the heat exchanging and accumulating particles
  • FIG. 6 is an illustration depicting the heat exchanging and accumulating particles arranged in a different manner
  • FIG. 7 is an illustration depicting the heat exchanging and accumulating particles arranged in yet a different manner.
  • FIG. 8 is a method flow diagram illustrating a heat transferring method in accordance with the present disclosure.
  • the present disclosure is directed to a heat exchanging and accumulating single well system for ground energy collection (hereinafter referred to as "heat accumulating single well").
  • the heat accumulating single well in accordance with the present disclosure collects ground energy (i.e., heat) through cycle water to provide energy sources for heat pumps. With stable energy sources, heat pumps work to provide constant heating, cooling and domestic hot water to buildings.
  • the single well system 100 includes a water- blocking heat-exchanging outer wall 104 buried underground and an insulated tube 106 located inside the outer wall 104.
  • Heat exchanging and accumulating particles 102 are positioned between the water- blocking heat-exchanging wall 104 and the insulated tube 106. As illustrated in FIG. 2, as water flows into the well downwards through the particles 102, the particles 102 keep absorbing or releasing heat through the water-blocking heat-exchanging wall 104 until their temperature becomes the same as the ground source 112.
  • the water is then collected at the settling area 108 and eventually enters the bottom of the insulated tube 106 through its perforated portion.
  • One or more water pumps 110 located near the bottom of the insulated tube 106 may then pump the cycle water up and out of the well 100.
  • the water pumped out of the well 100 may be delivered to power heat pumps or other heat consuming devices. And subsequently, the outflow from the heat pumps then flows back into the well 100. After full contact with particles 102 for heat exchange, the water reenters into the insulated tube 106 and repeats the cycle.
  • the water-blocking heat-exchanging wall 104 may be formed utilizing any material that is water resistant and suitable for heat transfer. Such materials may include, for example, fabric materials, plastic materials, metallic materials, or the like. It is also contemplated that while the water-blocking heat-exchanging material forms a circular wall as shown in FIG. 3, such a configuration is merely exemplary. The cross-section of the water-blocking heat- exchanging wall may be in various other shapes such as oval, square, rectangular or the like without departing from the spirit and scope of the present disclosure.
  • the particles 102 utilized in accordance with the present disclosure may be arranged in various manners to provide different heat exchanging and accumulating properties.
  • the particles are substantially spherical particles having a predetermined diameter.
  • the spherical shape forms gaps between the particles, and the predetermined diameter allows the gaps to be predictable.
  • This allows the heat exchanging and accumulating properties of the overall system to be predictable as water moves through the particles.
  • the ability to predict/calculate the heat exchanging and accumulating properties is appreciate in various situations, and it allows the system designer to adjust the diameter of the particles, which in turn adjusts the heat exchanging and accumulating properties of the overall system.
  • particles having different diameters may be utilized to provide different heat exchanging and accumulating properties.
  • the geometrical shape of the heat exchanging particles may be determined at least in part based on temperature of the ground energy source and/or the desired flow rate. For instance, larger particles may provide higher flow rate, which may be suitable if it is determined that the ground energy source provides a relatively higher temperature. On the other hand, smaller particles may provide lower flow rate, which may be suitable if it is determined that the ground energy source provides a relatively lower temperature.
  • the diameter of the particles may range between 1cm and 10cm, but may vary without departing from the spirit and scope of the present disclosure. It is also contemplated that the particles may include mostly rock, which is a naturally occurring solid aggregate of one or more minerals or mineraloids. However, other solid materials such as metallic materials or the like may also be utilized without departing from the spirit and scope of the present disclosure. Furthermore, while the particles 102 shown in the figures are generally spherical, other shapes and/or configurations may also be utilized.
  • a well chamber 114 is utilized to provide fluid access into and out of the well.
  • a sealant 116 seals the bottom of the well chamber 114 to prevent flow into the well other than through one or more predefined water inlets/pipes 118. Water delivered into the well through such pipes 118 is allowed to flow into the well downwards through the particles 102.
  • one or more deflectors 120 may be utilized to help evenly distribute the water flowing down the well, increasing heat exchange surfaces.
  • the water flowing down the well is then collected at the settling area 108 and eventually enters the bottom of the insulated tube 106 through its perforated portion.
  • One or more water pumps 110 located near the bottom of the insulated tube 106 then pump the water up through one or more exhalant siphons 122 and out of the well 100.
  • the exhalant siphon 122 is positioned inside the insulated tube 106 until it enters the well chamber 1 14. Positioning the exhalant siphon 122 inside the insulated tube 106 minimizes heat transfer that may occur on the exhalant siphon 122 as water is pumped out of the well 100.
  • the outer diameter D is configured to be between 15 to 100cm
  • the inner diameter d is configured to be between 10 to 30cm.
  • the water flow rate is determined based on the particular pump utilized for the system, which may vary based on specific needs and requirements.
  • the heat exchanging and accumulating single well system 100 in accordance with the present disclosure benefits from spacious heat exchange surface, continuously absorbing or releasing heat without any heat loss.
  • the full contact of the particles 102 and the heat exchanging wall 104 greatly enhances the efficiency of heat exchanging and collection. It maximizes the utilization of ground energy and accumulates energy in a cyclic manner.
  • this system is applicable to various geological conditions. Therefore, it is a good solution for shallow-ground energy collection and a reliable technology to provide constant energy source for heat pumps.
  • FIG. 8 is a method flow diagram illustrating a heat transferring method 800 in accordance with the present disclosure.
  • step 802 may direct a working fluid (e.g. , water) to flow through a plurality of heat exchanging particles disposed between a water-blocking heat-exchanging outer wall and an insulated inner tube as described above.
  • Step 804 may collect the working fluid at the bottom of the inner tube and step 806 may then pump the collected working fluid through an exhalant siphon and deliver the working fluid for energy consumption.
  • the working fluid may be cycle back in step 808 and the method may repeat again from step 802.
  • the technology of heat accumulating single well in accordance with the present disclosure overcomes the disadvantages presented in the buried pipe technology and greatly enhances working efficiency in collecting the heat.
  • the heat accumulating single well in accordance with the present disclosure increases the area of heat collection surface. It is not restricted to the heat exchange model used in traditional buried pipe where down-flow is to collect heat and up-flow is to release heat. In addition, it improves the efficiency of heat collection in comparison to traditional buried pipe where the contact of fillings with pipes and ground energy is not full. Furthermore, the ability to predict/calculate the heat exchanging and accumulating properties is appreciate in various situations, and it allows the system designer to adjust the diameter of the particles, which in turn adjusts the heat exchanging and accumulating properties of the overall system.
  • the system in accordance with the present disclosure is a heat transfer system, it can be used alternatively for heating and/or cooling as is required.
  • water the heat exchanging fluid
  • the fluid utilized in the system can be, without limitation, any working fluids include but are not limited to water, ethanol, methanol, acetone, as well as other engineered heat transfer fluids or any combination therein.
  • Other working fluids having even better heat transfer characteristics may also be used without departing from the scope and spirit of the present disclosure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

La présente invention concerne un procédé et un système de transfert d'une chaleur souterraine. Le système comprend une paroi externe d'échange thermique à blocage des pores par le filtrat, définissant une enceinte et un tube isolé situé à l'intérieur de l'enceinte. Le tube isolé définit une partie perforée au niveau du fond. Plusieurs particules d'échange thermique sont disposées entre la paroi externe et le tube isolé. Le système comprend également un orifice d'admission qui est conçu pour recevoir un fluide moteur et orienter le fluide moteur pour qu'il s'écoule à travers les particules d'échange thermique vers le fond de l'enceinte. Une pompe située à l'intérieur du tube isolé est conçue pour pomper le fluide moteur collecté au fond du tube isolé. Un siphon exhalant connecté de façon fluidique à la pompe à l'intérieur du tube isolé est conçu pour distribuer le fluide moteur en dehors du système de transfert thermique souterrain.
EP13850425.3A 2012-10-31 2013-10-31 Puits unique d'accumulation et d'échange thermique destiné à une collecte d'énergie terrestre Withdrawn EP2914910A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201261720601P 2012-10-31 2012-10-31
US14/044,549 US20140116643A1 (en) 2012-10-31 2013-10-02 Heat Exchanging and Accumulating Single Well for Ground Energy Collection
PCT/US2013/067684 WO2014070981A1 (fr) 2012-10-31 2013-10-31 Puits unique d'accumulation et d'échange thermique destiné à une collecte d'énergie terrestre

Publications (2)

Publication Number Publication Date
EP2914910A1 true EP2914910A1 (fr) 2015-09-09
EP2914910A4 EP2914910A4 (fr) 2016-06-29

Family

ID=50545894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13850425.3A Withdrawn EP2914910A4 (fr) 2012-10-31 2013-10-31 Puits unique d'accumulation et d'échange thermique destiné à une collecte d'énergie terrestre

Country Status (4)

Country Link
US (1) US20140116643A1 (fr)
EP (1) EP2914910A4 (fr)
EA (1) EA201590848A1 (fr)
WO (1) WO2014070981A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN106802005B (zh) * 2017-03-23 2023-08-15 中国建筑股份有限公司 一种垂直埋管地道通风与相变蓄能耦合系统
ES1182258Y (es) * 2017-03-30 2017-07-31 Lorenzo Luis Lopez Dispositivo intercambiador de calor
WO2020124085A1 (fr) * 2018-12-14 2020-06-18 Exotherm, Inc. Système de caloduc assisté par pompe utilisant le sol comme source pour chauffer et refroidir de l'eau, des serres et des bâtiments
CN109654759A (zh) * 2018-12-26 2019-04-19 中国科学院广州能源研究所 多层布置热管的地热开采装置
EP3690374A1 (fr) * 2019-01-30 2020-08-05 Siemens Gamesa Renewable Energy GmbH & Co. KG Accumulateur de chaleur avec régulation de perte de pression

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Also Published As

Publication number Publication date
WO2014070981A1 (fr) 2014-05-08
EP2914910A4 (fr) 2016-06-29
US20140116643A1 (en) 2014-05-01
EA201590848A1 (ru) 2015-09-30

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