WO2003078905A1 - Tube de sonde terrestre - Google Patents

Tube de sonde terrestre Download PDF

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Publication number
WO2003078905A1
WO2003078905A1 PCT/EP2003/001592 EP0301592W WO03078905A1 WO 2003078905 A1 WO2003078905 A1 WO 2003078905A1 EP 0301592 W EP0301592 W EP 0301592W WO 03078905 A1 WO03078905 A1 WO 03078905A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
geothermal
tube according
probe
section
Prior art date
Application number
PCT/EP2003/001592
Other languages
German (de)
English (en)
Inventor
Volker Liebel
Ludwig Heinloth
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
Priority to AU2003214062A priority Critical patent/AU2003214062A1/en
Publication of WO2003078905A1 publication Critical patent/WO2003078905A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
    • 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
    • F24T10/15—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 bent tubes; using tubes assembled with connectors or with return headers
    • 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 tube for heat transfer in the ground, consisting of pipes for the transport of a heat transfer medium, with at least one pipe section for the flow and a pipe section running approximately parallel to the return, the pipe sections being connected to one another.
  • heating systems with heat pumps have increasingly come into competition with heating systems operated with fossil fuels.
  • the increasing use of renewable energies can counteract the problems of fossil energy supply.
  • the utilization of renewable energy sources requires the use of heat pumps of different designs.
  • the principle of heat pumps is that heat is absorbed from the environment and transformed to a higher temperature level.
  • the efficiency or the coefficient of performance of a heat pump depends crucially on the temperature difference between the heat source and the heat sink. Since the temperature of the heat sink is usually predetermined, the quality of the heat source determines the possible uses and the cost-effectiveness of the heat pump.
  • the heat exchangers of an evaporator are laid directly in the ground and the refrigerant of the heat pump circuit flows through them.
  • the energy is transported from the floor to the heat pump evaporator via a heat transfer medium that flows in pipes laid in the ground. These pipes are thermodynamically coupled to the evaporator of the heat pump, so that the amount of heat required to evaporate the refrigerant can be extracted from the heat transfer medium.
  • geothermal collectors geothermal probes for heat exchangers.
  • the earth collectors are laid over a large area in the soil at a comparatively shallow depth.
  • Geothermal probes are installed vertically or diagonally in the ground and therefore require a much smaller footprint than ground collectors.
  • Such geothermal probes are described for example in DE 42 11 576 A1.
  • the geothermal probe is filled with a refrigerant as a heat carrier, which is evaporated in the lower part due to the geothermal energy.
  • the refrigerant vapor rises and condenses in the upper, cold part of the probe.
  • the heat of condensation released is used to evaporate the refrigerant in the heat pump circuit.
  • the condensed refrigerant of the probe then flows back into the lower part and is evaporated there again, the internal circuit of the geothermal probe is thus closed.
  • Another geothermal tube is known from DE 296 13 450 U1.
  • This known plastic earth probe with plastic pipes a pair of which is connected via a bend, which is made in two workpieces from the solid, which are welded to a block, in which the ends of the pipes are welded, is characterized in that Block has a manifold, which is divided longitudinally in both workpieces on the mirror side, recessed in both workpieces to form an arc and the subsequent legs and joined by the mirror welding, the pipe ends welded into the manifold legs and the manifold arc connecting them into one Should form a substantially unrestricted flow path.
  • this geothermal probe tube is very time-consuming and costly to produce and, due to the joining method used, has further disadvantages.
  • the welding of the pipes to the block with the elbow creates problems at the welding points on the one hand, problems with the later unrestricted transfer of the heat transfer medium and, on the other hand, with regard to strength, both when inserting the geothermal probe pipe into the borehole and in continuous operation.
  • the welds have a changed structure of the welded material and are to be rated as potential predetermined breaking points, particularly in the case of butt welding.
  • welded joints of this type pose a risk in themselves, since defective welds occur again and again due to material defects, machine malfunctions and also human inadequacies.
  • Such welding defects are not recognized during the pressure tests carried out before the earth probe tube is inserted into the earth bore and in many cases, particularly under continuous loads, lead to failure of the earth probe tubes.
  • Such leaks often only occur after several weeks or months of operation and can be found on defective welds between the geothermal tube and, for example, the known block with incorporated elbows, but also in butt-welded geothermal tubes.
  • geothermal probe tubes are known in which the tube section for the flow and the tube section for the return are connected to one another by means of molded parts, for example weld fittings. These molded parts are connected to the pipe sections, for example, by butt welding.
  • Welding fittings are also known which have heat sources, such as wires, in their walls.
  • the pipe sections for the flow and return are plugged into these weld fittings and by applying a current to the heat sources, the walls of the pipe sections and the weld fittings are heated to such an extent that they weld.
  • connection point between the pipe section for the flow and the pipe section for the return, at which, for example, the known weld fittings are positioned, is generally referred to as the head of the geothermal probe pipe.
  • This head of the geothermal probe tube must be inserted into the ground in an approx. 50 m deep borehole without the geothermal probe tube showing any leaks at this sensitive and difficult to access location.
  • the pipe section for the flow and the pipe section for the return are connected to one another in one piece via an approximately U-shaped pipe section formed from the pipe.
  • the head of the geothermal tube according to the invention has no risky pipe connection points.
  • an at least partially crosslinked polymeric material for the geothermal probe tubes according to the invention leads to further advantages, since due to the crosslinking, for example, the geothermal probe tubes according to the invention are not susceptible to external damage in comparison to uncrosslinked polymeric materials and, in contrast to this, at least up to a continuous operating temperature of 80 ° C do not have any propagation of cracks, so that any damage that may occur when the geothermal tubes according to the invention are introduced into the borehole do not lead to any leaks.
  • Tubes made of at least partially cross-linked polyethylene are particularly suitable for the industrial production of such geothermal tubes according to the invention, since even after heating above the crystal melting point they still have sufficient dimensional stability for the bending process.
  • geothermal probe tube according to the invention Another advantage of the geothermal probe tube according to the invention is that the use of an at least partially crosslinked polymeric material such as polyethylene makes the manufacture, in particular of the head of the geothermal probe tube according to the invention, very simple and inexpensive, and that the geothermal probe tube according to the invention has very small radii of the U-shape Pipe section are realizable.
  • the possible crease-free manufacture of the head of the earth probe tube according to the invention allows the diameter of the required earth hole to be reduced, which leads to a cost and time advantage when assembling the earth probe tube according to the invention.
  • a particularly advantageous embodiment of the geothermal pipes according to the invention has a radius of the U-shaped pipe - Cut on, which corresponds to approximately twice the pipe outer diameter.
  • the geothermal probe tube according to the invention is designed in such a way that it has a metallic layer which is and / or the outside is applied or introduced into the tube wall.
  • An additional diffusion barrier is integrated by means of the additional metallic layer, which can be, for example, a foil made of aluminum, and at the same time better heat conduction can be achieved, since this metallic layer has good conductivity.
  • the metallic layer brings about an even better dimensional stability of the earth probe tube according to the invention, in particular in the region of the U-shaped tube section.
  • the geothermal tube according to the invention has reinforcing elements. These reinforcing elements are applied to the inside and / or outside of the tube or are introduced into the tube wall. They bring about an improvement in the mechanical and chemical properties of the material.
  • the reinforcing elements can, for example, be fibers, wires or laminates.
  • geothermal tube according to the invention has webs on its outside.
  • these webs can be dimensioned in terms of their wall thickness and height such that both the mechanical properties and an increase in the surface of the geothermal tube can be achieved.
  • the webs pointing away from the outside of the geothermal tube can be designed in the axial direction of the tube, so that the heat transfer between the tube and the borehole filling is improved.
  • the geothermal probe tube has radially designed webs which are formed at certain intervals uniformly or alternately over the entire length in a ring on the geothermal probe tube and also lead to an increase in the surface area and thus to an optimization of the efficiency of the geothermal tube according to the invention.
  • the geothermal probe tube according to the invention has local reinforcements in the region of the head, which reinforcements consist, for example, of a thermosetting casting compound.
  • This potting compound is dimensioned such that it covers the entire head of the geothermal probe tube (s) according to the invention and has a conical shape at its free end protruding from the head of the geothermal probe, which considerably facilitates the insertion of the geothermal probe tubes according to the invention into the borehole.
  • the casting compound used for reinforcement can be mixed with fillers and / or reinforcing materials, so that the strength, in particular when inserted into the corresponding borehole, is given at all times.
  • the reinforcement of the head of the earth probe tube according to the invention can consist of a laminated fiber-reinforced thermoset layer, which once again significantly increases the mechanical properties when the earth probe is inserted into the borehole.
  • geothermal tube according to the invention will now be described in more detail using an exemplary embodiment which does not restrict the invention. It shows:
  • Fig. 1 sectional view of a geothermal tube according to the invention
  • FIG. 1 shows a sectional view through the earth probe 1.
  • the earth probe 1 consists of the earth probe tube 2 and an earth probe tube 3 arranged approximately offset at a right angle.
  • the earth probe tube 2 has a pipe section 21 for the flow and a pipe section 22 running approximately parallel to this for the return.
  • the pipe section 21 and the pipe section 22 are connected to one another in one piece via an approximately U-shaped pipe section 23.
  • the earth probe tube 3 is arranged at an almost right angle to the earth probe tube 2, the tube section for the flow and the tube section for the return of the earth probe tube 3, which are not shown here, being integrally connected to one another.
  • the earth probe tube 3 has reinforcement elements in the form of fibers, which have already been incorporated in the manufacture of the geothermal tube 3 in the extrusion process. However, it is also within the scope of the invention to use further fibers or laminates to reinforce the geothermal tube 3.
  • the earth probe tube 3 has on its outer side radially formed webs 6, which are arranged at equal distances from one another and lead to an increase in the heat absorption area of the earth probe tube 3 according to the invention.
  • these webs 6 can also be formed in the axial direction of the geothermal probe tube 2, 3 and thus lead to an improvement in the mechanical properties of the geothermal probe tube 2, 3.
  • the earth probe 1 has a covering 7 in the area in which the pipe section 21 for the flow and the pipe section 22 for the return connect to one another in one piece via an approximately U-shaped pipe section 23 formed from the pipe.
  • This covering 7, which consists for example of a thermosetting casting compound, protects this part of the earth probe 1, which is generally also referred to as the head of the earth probe 1.
  • this sheathing 7 contributes to a permanent fixation of the earth probe tube 2 and the earth probe tube 3 of the earth probe 1 and, particularly when the earth probe 1 is inserted into a borehole, brings about better and easier handling.
  • the casing 7 has fillers and / or reinforcing materials, so that the casing 7 comprising the geothermal probe tubes 2, 3 can be adapted to the respective requirements of the soil in which the geothermal probe 1 can be inserted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un tube de sonde terrestre (2) destiné à transmettre la chaleur dans le sol et comprenant des tubes pour le transport d'un agent caloporteur. Au moins une section de tube (21) sert à l'arrivée et, sensiblement parallèle à celle-ci, une section de tube (22) effectue le retour, ces sections de tubes étant reliées pour former une unité.
PCT/EP2003/001592 2002-02-19 2003-02-18 Tube de sonde terrestre WO2003078905A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003214062A AU2003214062A1 (en) 2002-02-19 2003-02-18 Earth probe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20202578U DE20202578U1 (de) 2002-02-19 2002-02-19 Erdsondenrohr
DE20202578.0 2002-03-19

Publications (1)

Publication Number Publication Date
WO2003078905A1 true WO2003078905A1 (fr) 2003-09-25

Family

ID=7967993

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/001592 WO2003078905A1 (fr) 2002-02-19 2003-02-18 Tube de sonde terrestre

Country Status (3)

Country Link
AU (1) AU2003214062A1 (fr)
DE (1) DE20202578U1 (fr)
WO (1) WO2003078905A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006100014A1 (fr) * 2005-03-22 2006-09-28 Gf-Tec Gmbh Embout de sonde
EP2034254A2 (fr) 2007-09-06 2009-03-11 Erwin Kopp Dispositif de protection d'un pied de sonde pour une sonde terrestre
DE102008057245A1 (de) 2008-04-22 2009-10-29 Friatec Aktiengesellschaft Modular aufgebauter Sondenfuß und seine Komponenten
JP2014163554A (ja) * 2013-02-22 2014-09-08 Kubota-C. I Co Ltd 地中熱利用システムの熱交換装置の施工方法および地中熱利用システム

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006011161A1 (de) * 2006-03-10 2007-09-13 Joachim Pinkl Stabiler Sondenfuß für eine Erdsonde
DE202007004346U1 (de) * 2007-03-21 2007-10-31 Rehau Ag + Co Rohranordnung
DE102007024656A1 (de) 2007-05-26 2008-11-27 Joachim Pinkl Sondenfuß Gemini für eine Erdsonde
DE202007018807U1 (de) * 2007-07-31 2009-07-16 Gf-Tec Gmbh Erdwärmesonden-Rohrformteil
DE202007011565U1 (de) * 2007-08-17 2009-01-02 Rehau Ag + Co Rohranordnung
DE102007051674A1 (de) 2007-10-26 2009-04-30 Rehau Ag + Co. Verfahren zum Verformen von Rohren
DE202007015039U1 (de) * 2007-10-26 2009-03-12 Rehau Ag + Co. Rohr zum Temperieren
DE202007017371U1 (de) * 2007-12-11 2009-04-16 Rehau Ag + Co Erdwärmesonde aus vernetztem Polymermaterial
DE202009004592U1 (de) 2008-06-10 2009-06-18 FITR-Gesellschaft für Innovation im Tief- und Rohrleitungsbau Weimar mbH Sondenfuß für eine Erdwärmesonde
DE202008012453U1 (de) 2008-09-18 2010-02-11 Rehau Ag + Co Erdwärmesonde
DE102009030153A1 (de) 2009-06-19 2011-01-27 Terra Calidus Gmbh Sondenfuß
DE202011052396U1 (de) * 2011-12-21 2013-03-22 Rehau Ag + Co. Erdwärmesondenanordnung
CH714084B1 (de) * 2017-08-28 2021-06-30 Hakagerodur Ag Erdwärmesondenfuss für eine Erdwärmesonde und Erdwärmesonde.

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU81670A1 (de) * 1979-09-10 1980-01-24 Feist Artus Verfahren zur erdwaermegewinnung und vorrichtung zur durchfuehrung dieses verfahrens
DE3022588A1 (de) * 1980-06-16 1981-12-24 Hans 4407 Emsdetten Hinterding Erdsonde zur erzeugung eines wasserstromes fuer die speisung einer waermepumpe
EP0358178A1 (fr) * 1988-09-06 1990-03-14 Symalit AG Tuyau multi-couche en matière plastique et procédé de fabrication pour celui-ci
CH674669A5 (en) * 1988-04-29 1990-06-29 Walter Johann Caldonazzi Sharp return bend mfr. - by pushing heated end of thermoplastic tube over heated mandrel
DE4211576A1 (de) 1991-07-06 1993-01-07 Poehlmann Anwendungstechnik Gm Heizanlage mit einer waermepumpe und mindestens einer erdreichsonde
CH687268A5 (de) * 1993-06-09 1996-10-31 Haka Ag Fabrik Fur Kunststoff Sondenfuss fuer eine Erdsonde.
DE29613450U1 (de) 1996-07-09 1996-11-28 Wassermann, Herbert, 47574 Goch Erdsonde
WO1999063282A1 (fr) * 1998-06-01 1999-12-09 Enlink Geoenergy Services, Inc. Systeme souterrain d'echange de chaleur
WO2000014374A1 (fr) * 1998-09-02 2000-03-16 Ooms Avenhorn B.V. Procede et equipement pour enficher dans le sol des tuyaux verticaux raccordes les uns aux autres
DE29912335U1 (de) * 1999-07-14 2000-08-17 Akatherm Höhn GmbH, 67346 Speyer Erdsonde

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3913429A1 (de) * 1988-05-19 1989-11-23 Naegelebau Ges M B H & Co Erdkollektor zur erdwaermegewinnung und zur waermespeicherung im erdreich sowie verfahren zur errichtung eines erdkollektors
CH689402A5 (de) * 1992-10-13 1999-03-31 Foralith Ag Verfahren zum Einbringen einer Erdsonde und Erdsonde.
DE19958765A1 (de) * 1999-06-29 2001-06-13 Zae Bayern Graphithaltiges Verfüllmaterial für Erdreichwärmeübertrager und Erdstarkstromkabel

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU81670A1 (de) * 1979-09-10 1980-01-24 Feist Artus Verfahren zur erdwaermegewinnung und vorrichtung zur durchfuehrung dieses verfahrens
DE3022588A1 (de) * 1980-06-16 1981-12-24 Hans 4407 Emsdetten Hinterding Erdsonde zur erzeugung eines wasserstromes fuer die speisung einer waermepumpe
CH674669A5 (en) * 1988-04-29 1990-06-29 Walter Johann Caldonazzi Sharp return bend mfr. - by pushing heated end of thermoplastic tube over heated mandrel
EP0358178A1 (fr) * 1988-09-06 1990-03-14 Symalit AG Tuyau multi-couche en matière plastique et procédé de fabrication pour celui-ci
DE4211576A1 (de) 1991-07-06 1993-01-07 Poehlmann Anwendungstechnik Gm Heizanlage mit einer waermepumpe und mindestens einer erdreichsonde
CH687268A5 (de) * 1993-06-09 1996-10-31 Haka Ag Fabrik Fur Kunststoff Sondenfuss fuer eine Erdsonde.
DE29613450U1 (de) 1996-07-09 1996-11-28 Wassermann, Herbert, 47574 Goch Erdsonde
WO1999063282A1 (fr) * 1998-06-01 1999-12-09 Enlink Geoenergy Services, Inc. Systeme souterrain d'echange de chaleur
WO2000014374A1 (fr) * 1998-09-02 2000-03-16 Ooms Avenhorn B.V. Procede et equipement pour enficher dans le sol des tuyaux verticaux raccordes les uns aux autres
DE29912335U1 (de) * 1999-07-14 2000-08-17 Akatherm Höhn GmbH, 67346 Speyer Erdsonde

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006100014A1 (fr) * 2005-03-22 2006-09-28 Gf-Tec Gmbh Embout de sonde
EP2034254A2 (fr) 2007-09-06 2009-03-11 Erwin Kopp Dispositif de protection d'un pied de sonde pour une sonde terrestre
DE102008057245A1 (de) 2008-04-22 2009-10-29 Friatec Aktiengesellschaft Modular aufgebauter Sondenfuß und seine Komponenten
WO2009129778A2 (fr) 2008-04-22 2009-10-29 Friatec Aktiengesellschaft Pied de sonde à structure modulaire et ses composants
JP2014163554A (ja) * 2013-02-22 2014-09-08 Kubota-C. I Co Ltd 地中熱利用システムの熱交換装置の施工方法および地中熱利用システム

Also Published As

Publication number Publication date
AU2003214062A1 (en) 2003-09-29
DE20202578U1 (de) 2003-04-10

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