WO2008152470A2 - Sonde géothermique pour un système de conditionnement d'air - Google Patents

Sonde géothermique pour un système de conditionnement d'air Download PDF

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Publication number
WO2008152470A2
WO2008152470A2 PCT/IB2008/001485 IB2008001485W WO2008152470A2 WO 2008152470 A2 WO2008152470 A2 WO 2008152470A2 IB 2008001485 W IB2008001485 W IB 2008001485W WO 2008152470 A2 WO2008152470 A2 WO 2008152470A2
Authority
WO
WIPO (PCT)
Prior art keywords
geothermal probe
cavities
fluid
geothermal
air
Prior art date
Application number
PCT/IB2008/001485
Other languages
English (en)
Other versions
WO2008152470A3 (fr
Inventor
Gino Di Rezze
Edmondo Petrozzi
Domenico Palombo
Robert Martini
Illario Giletski
Original Assignee
Groundheat Systems International S.R.L.
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 Groundheat Systems International S.R.L. filed Critical Groundheat Systems International S.R.L.
Publication of WO2008152470A2 publication Critical patent/WO2008152470A2/fr
Publication of WO2008152470A3 publication Critical patent/WO2008152470A3/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
    • 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
    • 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
    • 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
    • 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 present invention relates to a geothermal probe for an air-conditioning system.
  • Low-enthalpy geothermy regards exploitation of the Earth's heat located in the proximity of the surface. In this way, it is possible, using heat pumps combined with geothermal probes, to capture and exchange the heat at a depth that can vary from one metre to hundreds of metres outside any geothermal anomaly and, hence, without any territorial constraint.
  • geoexchange The technology referred to as "geoexchange" technology is based upon low-enthalpy geothermy and enables air conditioning of environments.
  • a system based upon geoexchange is basically constituted by a geothermal probe, a heat pump installed within the building, and a heat-distribution system.
  • the geothermal probe basically consists of a pair of pipes set vertically in the ground at a maximum depth of approximately one hundred metres and connected to one another at the bottom by a "U" connector. At the surface the pipes of the geothermal probe are connected to a purposely provided manifold connected to the heat pump. Inside the geothermal probe a fluid circulates, generally constituted by water or by a water/glycol mixture, which exchanges heat with the ground as it flows underground.
  • the pipes of the geothermal probes are physically- separate from one another and connected together at their bottom end by a "U" connector.
  • a solution of this sort entails a series of disadvantages deriving basically from the poor stability of the pipes thus connected together, in particular during their installation in the excavation in which they are to be housed.
  • the two pipes connected as described undergo distortion, it is necessary to intervene to restore their correct position, and such an intervention, in addition to slowing down the operations of installation, risks damaging the excavation for housing the geothermal probe. Sometimes the damage to said excavation can even render it necessary to repeat the excavation.
  • the aim of the present invention is to provide a geothermal probe the technical characteristics of which will be such as to solve the problems of the known art in a simple and inexpensive way.
  • Forming the subject of the present invention is a geothermal probe for an air-conditioning system designed to be inserted in a vertical position in the ground and comprising a descending branch and an ascending branch for a fluid that is to exchange heat with the ground; said geothermal probe being characterized in that it comprises a monolithic body made of polymeric material, provided in which are two longitudinal through cavities substantially parallel to one another, one of the two cavities representing said descending branch and the other of the two cavities representing said ascending branch for said fluid.
  • the geothermal probe of the present invention comprises an end-connection element designed to be welded to a bottom end of said monolithic body and designed to connect the two cavities in a fluid-tight way.
  • the geothermal probe of the present invention is made of high-density polyethylene .
  • Figure 1 is a longitudinal section of the geothermal probe forming the subject of the present invention
  • Figure 2 is a cross section of a detail of the geothermal probe of Figure 1;
  • Figure 3 illustrates the geothermal probe forming the subject of the present invention in an operative position.
  • Figure 1 designated as a whole by 1 is the geothermal probe according to the present invention.
  • the geothermal probe 1 comprises a monolithic body 2 obtained by extrusion of high-density polyethylene and made in which are two longitudinal through cavities 3 set parallel to one another. As represented in Figures 1 and 2, the two cavities 3 have a cylindrical conformation and are designed to house the circulating fluid. In particular, one of the two cavities 3 represents the descending branch and the other the ascending branch for the fluid, which is usually water or a water/glycol mixture .
  • the geothermal probe 1 comprises a connection element 4 , which is coupled by means of welding to an end 2a of the monolithic body 2.
  • a connection element 4 Made in the connection element 4 is a "U" -shaped through cavity 5, which, as may be readily understood from Figure 1, connects the two cavities 3 to one another in a fluid-tight way to enable circulation of the fluid from the descending branch to the ascending branch.
  • Figure 3 represents the geothermal probe 1 set in operative conditions. As is illustrated, the geothermal probe 1 is set in a vertical position within an excavation 6 made in the ground.
  • the geothermal probe 1 comprises the connection element 4 fixed to the bottom end 2a of the monolithic body 2 for connecting the cavities 3 in a fluid-tight way.
  • each of the two cavities 3 is connected to a respective manifold pipe I 1 which is connected to a heat pump, known and not described for reasons of simplicity.
  • the excavation 6 is filled with bentonite to embed the geothermal probe within it.
  • the geothermal probe forming the subject of the present invention is handled with extreme simplicity and convenience without incurring the problems of the known art as described above. In this way, the risks of damage to the excavation for housing the probe are reduced considerably, and a shorter installation time is required.
  • the geothermal probe forming the subject of the present invention is produced and assembled at lower costs and with lower expenditure of time as compared to geothermal probes of the known art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Road Paving Structures (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

L'invention porte sur une sonde géothermique (1) pour un système de conditionnement d'air mise au point pour être introduite dans une position verticale dans le sol et comprenant une branche descendante et une branche ascendante pour un fluide qui doit échanger de la chaleur avec le sol; la sonde géothermique comprend un corps monolithique (2) fait d'un matériau polymère, dans lequel se trouvent deux cavités traversantes longitudinales (3) sensiblement parallèles entre elles; l'une des deux cavités (3) représente la branche descendante et l'autre des deux cavités (3) représente la branche ascendante pour le fluide.
PCT/IB2008/001485 2007-06-11 2008-06-10 Sonde géothermique pour un système de conditionnement d'air WO2008152470A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000410A ITBO20070410A1 (it) 2007-06-11 2007-06-11 Sonda geotermica per un impianto di climatizzazione
ITBO2007A000410 2007-06-11

Publications (2)

Publication Number Publication Date
WO2008152470A2 true WO2008152470A2 (fr) 2008-12-18
WO2008152470A3 WO2008152470A3 (fr) 2009-02-05

Family

ID=40010766

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/001485 WO2008152470A2 (fr) 2007-06-11 2008-06-10 Sonde géothermique pour un système de conditionnement d'air

Country Status (2)

Country Link
IT (1) ITBO20070410A1 (fr)
WO (1) WO2008152470A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2933171A1 (fr) * 2008-06-26 2010-01-01 Unistar Europ Sonde pour installations geothermiques

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4714108A (en) * 1985-05-13 1987-12-22 Pyramid Industries, Inc. Heat pump system
EP0582118A1 (fr) * 1992-08-06 1994-02-09 Sacac Hergiswil Ag Sonde souterraine, entretoise pour sonde souterraine et pieu monobloc à sonde souterraine, installation géothermique et procédé pour la fabrication d'une installation géothermique
CH687268A5 (de) * 1993-06-09 1996-10-31 Haka Ag Fabrik Fur Kunststoff Sondenfuss fuer eine Erdsonde.
US20050121169A1 (en) * 2003-12-09 2005-06-09 Mcnair Edward F. Geothermal heating and/or cooling apparatus and method of using same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4714108A (en) * 1985-05-13 1987-12-22 Pyramid Industries, Inc. Heat pump system
EP0582118A1 (fr) * 1992-08-06 1994-02-09 Sacac Hergiswil Ag Sonde souterraine, entretoise pour sonde souterraine et pieu monobloc à sonde souterraine, installation géothermique et procédé pour la fabrication d'une installation géothermique
CH687268A5 (de) * 1993-06-09 1996-10-31 Haka Ag Fabrik Fur Kunststoff Sondenfuss fuer eine Erdsonde.
US20050121169A1 (en) * 2003-12-09 2005-06-09 Mcnair Edward F. Geothermal heating and/or cooling apparatus and method of using same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2933171A1 (fr) * 2008-06-26 2010-01-01 Unistar Europ Sonde pour installations geothermiques

Also Published As

Publication number Publication date
ITBO20070410A1 (it) 2008-12-12
WO2008152470A3 (fr) 2009-02-05

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