WO2013091853A1 - Ensemble de sondes géothermiques - Google Patents

Ensemble de sondes géothermiques Download PDF

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Publication number
WO2013091853A1
WO2013091853A1 PCT/EP2012/005270 EP2012005270W WO2013091853A1 WO 2013091853 A1 WO2013091853 A1 WO 2013091853A1 EP 2012005270 W EP2012005270 W EP 2012005270W WO 2013091853 A1 WO2013091853 A1 WO 2013091853A1
Authority
WO
WIPO (PCT)
Prior art keywords
ground
geothermal probe
tube
probe assembly
cavity
Prior art date
Application number
PCT/EP2012/005270
Other languages
German (de)
English (en)
Inventor
Jörg STOSCHUS
Original Assignee
Rehau Ag + Co
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 Rehau Ag + Co filed Critical Rehau Ag + Co
Publication of WO2013091853A1 publication Critical patent/WO2013091853A1/fr

Links

Classifications

    • 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
    • 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

Definitions

  • the invention relates to a geothermal probe assembly and means for exchanging heat energy with the ground.
  • geothermal probe arrangements it is possible to remove thermal energy from the ground, for example for heating purposes, but also to supply heat energy to the earth in order to cool buildings, for example, and then remove the thermal energy temporarily stored in the ground for heating purposes.
  • geothermal probe arrangements For this purpose, a variety of geothermal probe arrangements is known from the prior art, which are introduced into corresponding cavities in the ground and there accomplish the heat energy exchange with the ground.
  • aquifers are also drilled in the soil.
  • Voids in the backfill material which can not escape when filling, particularly hinder the thermal connection to the ground and reduce the effectiveness of the geothermal probe assembly.
  • Another object of the invention is to provide a device for exchanging thermal energy with the ground.
  • Geothermal probe assembly for introduction into a cavity in the ground, in which two tubes, one of which is provided as a flow and the other as return for a fluid flowing through, then in the context of the invention is advantageous if at least one tube at least one element is arranged which spaces the tube inserted into the cavity in the ground from the wall of the cavity.
  • the geothermal probe arrangement is understood to mean the following:
  • a borehole heat exchanger is in this case installed in a ground hole borehole or free space, which is generally introduced vertically into the ground, from pipes, in particular plastic pipes.
  • This may be a probe having two pipes for the supply and return of the fluid, wherein the two pipes for supply and return of the fluid at their ends by a connector, a so-called. Probe foot, are connected.
  • Coaxial probe in which an inner tube is arranged in the lumen of an outer tube, wherein the outer tube depending on the configuration forms the flow or the return and the inner tube then corresponding to the return or the flow ,
  • the outer tube is closed at its lower end in a suitable manner, for example by a blind plug.
  • geothermal probes are suitable to extract heat from the ground and to provide, for example, for heating purposes of a building.
  • geothermal probes are also designed to deliver heat energy extracted from the building to the earth, for example for cooling purposes of the building.
  • This heat energy extracted from the building and supplied to the ground can be particularly advantageously temporarily stored in the ground and then available, for example, in the winter season for heating purposes in which the geothermal probe can then extract heat energy for heating purposes from the heated soil.
  • Such a U geothermal probe consists of at least two tubes, which are provided for the flow and return of the heat transfer fluid.
  • Such underground geothermal probes are associated with the disadvantage that they can suffer a "thermal short circuit" when installed in the cavity in the ground by a certain length of the two tubes, one of which the flow and the other of the return for the conductive Form heat transfer fluid, abut each other.
  • a "thermal short circuit" is undesirable, since thereby the performance of the geothermal probe assembly is reduced by the soil extracted heat can not be fully utilized by these proportions, for example, from the return proportionally immediately on the supply passes or by heat to be stored in the ground from the flow In both cases, the efficiency of the probe is minimized.
  • thermal short can no longer be repaired on a probe installed in the ground. This thermal short circuit is caused by the inventive
  • the tubes of the geothermal probe assembly are to be spaced from the wall of the introduced into the ground cavity so that a secure backfilling of this space between geothermal probe and wall of the cavity can be done.
  • a secure backfilling of the free space can take place when at least one element is arranged on at least one tube, which space the tube introduced into the cavity in the ground from the wall of the cavity. It has proved to be particularly favorable in the context of the present invention, when the element with which the spacing of the tube is formed by the wall of the cavity in the ground, is formed integrally with the tube.
  • the integrally formed with the tube element may in this case contain a polymer material or consist of polymer material, wherein the polymer material is preferably selected from a polyolefin, particularly preferably from a polyethylene or a polypropylene or a crosslinked polyethylene.
  • the tube and the element consist of the same polymer material, so that they can be produced in any length of time in a continuous shaping process, for example an extrusion process.
  • a polyolefin is easy to process, excellently recyclable and cost effective.
  • Polyethylene is a particularly preferred material for this purpose, which has a high toughness and is inert to most substances that occur in the ground and are included in the course of the geothermal probe assembly flowing through fluid.
  • polypropylene is, with certain limitations, a polymer material suitable for this purpose.
  • a cross-linked polyethylene is particularly preferred for the production of a geothermal probe assembly of the present invention, since this material is particularly tough, the possible damage particularly well with the introduction into the cavity in the ground, durable and above all is extremely inert against the most diverse substances.
  • the element which in the context of the present invention causes the spacing of the tube to the wall of the cavity in the ground, has a longitudinal extent and is thus arranged along at least part of the length of the tube.
  • the element may be formed as a web which is arranged in the axial direction on the outer surface of the tube and comprises a part of the length of the tube or the entire length of the tube.
  • a plurality of elements along the circumference of the tube can be arranged such that they approximately equally spaced the distance of the tube to the wall of the borehole in the ground in all directions in a plane perpendicular to the tube axis cutting plane and thus approximately center the tube in the borehole.
  • the element is formed as a web, in T-shape, in H-shape, in O-shape, in V-shape or in a mixed form of the aforementioned forms.
  • T-shape for the element, wherein the "foot” of the T-shape is connected to the pipe, while the wide “projecting” on both sides “head portion” of the T-shape against the wall of the borehole in the soil and thereby the pipe is supported and centered largely in the borehole.
  • geothermal probe arrangement has further advantages:
  • the tube In addition to the safe spacing of the tube from the wall of the cavity in the ground, the tube, in particular with the element or elements on an enlarged exchange surface and is thus able to exchange more heat energy with the ground.
  • this geothermal probe arrangement can be increased.
  • Another advantage is that it may be provided in a coaxial probe to provide the inner tube with the elements and thus to achieve a spacing of the inner tube from the inner wall of the outer tube. As a result, a thermal short circuit can be minimized or avoided. This increases the effectiveness of such a coaxial probe.
  • a helix probe which comprises a tube which extends approximately straight, around which the second tube is wound in a helical turn, the two tubes being connected to one another, the elements for spacing from the wall of the bore hole to provide in the ground.
  • a helical depth probe in which a helix probe is inserted into great depths in the ground, such as 150 m and more, can advantageously be operated by providing these elements for spacing from the wall of the borehole in the ground.
  • the backfill material is introduced from above / from the earth's surface into the cavity in the ground.
  • the filling material is chosen so that it is as low-viscosity as possible and has a high thermal conductivity.
  • Such a geothermal probe assembly is particularly fast and inexpensive to install in the cavity in the ground.
  • elements for spacing the tube from the wall of the cavity in the ground are arranged on the outer tube.
  • a device for exchanging heat energy with the ground which has at least one borehole heat exchanger arrangement as described above.
  • Fig. 2 is a schematic plan view in the longitudinal direction of a geothermal probe assembly according to the invention in a cavity in the ground in a partially sectioned view.
  • Fig. 1 is a schematic cross section through a geothermal probe assembly 1 according to the invention in a cavity 5 in the ground 8 is shown.
  • Geothermal probe assembly 1 is installed.
  • the geothermal probe assembly 1 in this case comprises two approximately parallel tubes 2, 2 '.
  • the tube 2 can in the present case, for example, as a flow for in the
  • Geothermal probe assembly 1 to be used fluid to be used the pipe 2 then as return. With the help of the geothermal probe assembly 1 flowing through fluid heat energy is exchanged with the ground 8.
  • the webs 4 are about the same complained along the circumference of the tubes 2, 2 'arranged.
  • the webs 4 are used so that the positioning of the geothermal probe assembly 1 in the cavity 5 in the ground 8 is approximately centered, so that the space between the wall 6 of the cavity 5 and the tubes 2, 2 'are filled in a simple manner with the backfill material 7 can.
  • the tubes 2, 2 ' are spaced apart by the elements 4 serving as spacers to the wall 6 of the cavity 5 in the ground 8.
  • a very good thermal connection between the ground 8 and the pipes 2, 2 ' can be achieved; furthermore, the free space between the wall 6 of the cavity 5 in the ground 8 and the pipes 2, 2' can be over the entire or approximately the entire length of the cavity 5 in the soil 8 are filled with the backfill material 7, so that individual aquifers (aquifers) can be safely separated from each other.
  • Fig. 1 it is further shown that two elements 4 on the tubes 2, 2 'are aligned such that they assign approximately to each other.
  • FIG. 2 shows a schematic longitudinal plan view of a borehole heat exchanger arrangement 1 according to the invention in a cavity 5 in the ground 8 in a partially sectioned view.
  • the inventive geothermal probe assembly 1 is installed in a cavity 5 in the ground 8.
  • the cavity 5 in the ground 8 has been produced for this purpose, for example, in a drilling process.
  • the geothermal probe assembly 1 in this case comprises two tubes 2, 2 ', of which one tube, for example, tube 2, serves as a flow and the other tube, tube 2', as a return for the fluid to be conducted.
  • the circulating in the geothermal probe assembly 1 fluid exchanges heat energy during operation of the geothermal probe assembly 1 with the ground 8 from.
  • On the tubes 2, 2 'elements 4 are provided, which, as shown in Fig. 2, are formed as webs.
  • the webs 4 serve to space the tubes 2, 2 'from the wall 6 of the cavity 5 in the ground 8 and from each other.
  • the webs 4 are formed on the tubes 2, 2 'in sections, wherein they have a longitudinal extent, which extends in the axial direction of the tube.
  • bevels 4.1 are arranged, which serve that the introduction of the geothermal probe assembly 1 in the cavity 5 in the earth floor 8 is facilitated, thereby avoiding that it comes to wedging or jamming.
  • the elements 4 are arranged several times along the circumference of the tubes 2, 2 '.
  • the inventive geothermal probe assembly 1 allows that the space between the wall 6 of the cavity 5 in the ground 8 and the tubes 2, 2 'in a simple manner can be filled with the backfill material 7, in which it is ensured that none of the tubes. 2 , 2 'on the wall 6 of the cavity 5 in the ground 8 and also does not abut each other, and there possibly prevents the filling or makes it difficult.
  • the thermal KuerzQuery between the tubes 2, 2 ' is thereby excluded because the tubes 2, 2' are spaced from each other by the elements 4.
  • the filling of the free space can thus be accomplished over the entire length, whereby a very good thermal connection between ground 8 and the pipes 2, 2 'is ensured.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

L'invention concerne un ensemble de sondes géothermiques (1) destiné à être introduit dans une cavité (5) ménagée dans le sol (8), comportant deux tuyaux (2, 2') dont un sert à l'arrivée et l'autre au retour d'un fluide qui les traverse. Selon l'invention, sur au moins un tuyau (2, 2') est agencé au moins un élément (4) qui écarte de la paroi (6) de la cavité (5) les tuyaux (2, 2') agencés dans le sol dans la cavité (5).
PCT/EP2012/005270 2011-12-21 2012-12-19 Ensemble de sondes géothermiques WO2013091853A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202011052396.9 2011-12-21
DE202011052396U DE202011052396U1 (de) 2011-12-21 2011-12-21 Erdwärmesondenanordnung

Publications (1)

Publication Number Publication Date
WO2013091853A1 true WO2013091853A1 (fr) 2013-06-27

Family

ID=47522452

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/005270 WO2013091853A1 (fr) 2011-12-21 2012-12-19 Ensemble de sondes géothermiques

Country Status (2)

Country Link
DE (1) DE202011052396U1 (fr)
WO (1) WO2013091853A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9897347B2 (en) 2013-03-15 2018-02-20 Thomas Scott Breidenbach Screw-in geothermal heat exchanger systems and methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015105746U1 (de) * 2015-10-29 2017-01-31 Rehau Ag + Co Speicher für Wärmeenergie in modularer Bauweise

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129219A1 (de) * 1981-07-24 1983-02-10 Inefa Kunststoffe Ag, 2210 Itzehoe Anordnung von erdsonden, sowie erdsonde
US5339890A (en) * 1993-02-08 1994-08-23 Climate Master, Inc. Ground source heat pump system comprising modular subterranean heat exchange units with concentric conduits
DE20202578U1 (de) * 2002-02-19 2003-04-10 REHAU AG + Co., 95111 Rehau Erdsondenrohr
DE202007005796U1 (de) * 2007-04-21 2007-08-02 Müller, Hans-Werner Abstandhalter zur achsparallelen Fixierung mehrerer Rohrstränge
JP2009287914A (ja) * 2008-04-30 2009-12-10 Daikin Ind Ltd 熱交換器及び空調システム

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935832A1 (de) * 1979-09-05 1981-03-26 Artus 5060 Bergisch Gladbach Feist Verfahren zur erdwaermegewinnung und vorrichtung zur durchfuehrung dieses verfahrens
DE102007036114A1 (de) * 2007-08-01 2009-02-05 Zimmermann, Johann Thermisch-Teilisolierte-Erdwärmesonde
DE102009031364A1 (de) * 2009-07-02 2011-04-28 Miwah Gmbh Abstandshalter für Rohrpaare

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129219A1 (de) * 1981-07-24 1983-02-10 Inefa Kunststoffe Ag, 2210 Itzehoe Anordnung von erdsonden, sowie erdsonde
US5339890A (en) * 1993-02-08 1994-08-23 Climate Master, Inc. Ground source heat pump system comprising modular subterranean heat exchange units with concentric conduits
DE20202578U1 (de) * 2002-02-19 2003-04-10 REHAU AG + Co., 95111 Rehau Erdsondenrohr
DE202007005796U1 (de) * 2007-04-21 2007-08-02 Müller, Hans-Werner Abstandhalter zur achsparallelen Fixierung mehrerer Rohrstränge
JP2009287914A (ja) * 2008-04-30 2009-12-10 Daikin Ind Ltd 熱交換器及び空調システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9897347B2 (en) 2013-03-15 2018-02-20 Thomas Scott Breidenbach Screw-in geothermal heat exchanger systems and methods

Also Published As

Publication number Publication date
DE202011052396U1 (de) 2013-03-22

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