DE102008052417A1 - Closed probe system for use with geothermal energy, particularly terrestrial heat from large depths, comprises sunk bore and probe tube arranged for transporting fluid heat transfer medium - Google Patents
Closed probe system for use with geothermal energy, particularly terrestrial heat from large depths, comprises sunk bore and probe tube arranged for transporting fluid heat transfer medium Download PDFInfo
- Publication number
- DE102008052417A1 DE102008052417A1 DE102008052417A DE102008052417A DE102008052417A1 DE 102008052417 A1 DE102008052417 A1 DE 102008052417A1 DE 102008052417 A DE102008052417 A DE 102008052417A DE 102008052417 A DE102008052417 A DE 102008052417A DE 102008052417 A1 DE102008052417 A1 DE 102008052417A1
- Authority
- DE
- Germany
- Prior art keywords
- probe tube
- probe
- geothermal energy
- closed
- probe system
- 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- Withdrawn
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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
- 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
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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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
Description
Die Erfindung betrifft ein geschlossenes Sonden-System zur Nutzung von geothermischer Energie, insbesondere von Erdwärme aus großen Tiefen, bestehend aus einer abgeteuften Bohrung und einem darin angeordneten, ein Wärmeübertragungsmedium transportierendes Sondenrohr.The The invention relates to a closed probe system for the use of geothermal energy, especially from geothermal energy from large Deep, consisting of a drilled hole and a hole in it arranged, a heat transfer medium transporting Probe tube.
Die Erschließung und Nutzung von geothermischer Energie in geschlossenen Sonden-Systemen aus oberflächennahen und aus tiefen Erdformationen ist bekannt. Der Hohlraum zwischen der abgeteuften Bohrung und dem äußeren Mantel des Sondenrohres wird dabei zumeist zur Stabilisierung des Sondenrohres mit speziellen Zementen hinterfüllt.The Development and use of geothermal energy in enclosed probe systems from near-surface and from deep earth formations is known. The cavity between the drilled hole and the outer jacket of the Probe tube is usually used to stabilize the probe tube backfilled with special cements.
Diese zementartigen Hinterfüllungen haben jedoch den Nachteil, dass sie einen niedrigeren Wärmeleitungskoeffizienten als den des Sondenrohres aufweisen und damit insbesondere bei geschlossenen Sonden-Systemen nur eine geringe Wärmeausbeute aus der umgebenden Erdformation ermöglichen. Die Zementfüllungen unterliegen insbesondere in großen Tiefen, hervorgerufen durch große Temperaturschwankungen und Bewegungen in der Erdformation, hohen Eigenspannungen, die zu Rissen, Luftspalten und Poren führen und damit keine vollflächige Berührung des Sondenrohres mit der wärmeführenden Erdformation ermöglichen.These However, cementitious backfills have the disadvantage that they have a lower coefficient of thermal conductivity than have the probe tube and thus especially in closed Probe systems only a low heat yield from the enable surrounding earth formation. The cement fillings subject especially at great depths, caused due to large temperature fluctuations and movements in the Earth formation, high residual stresses leading to cracks, air gaps and lead pores and thus no full-surface Touching the probe tube with the heat-conducting Enable Earth formation.
Es ist bekannt, bei der Abteufung von Tiefenbohrungen zum Zweck der Öl- und Gasgewinnung als Füllmaterial zwischen Bohrung und Sondenrohr verschiedenste Zusammensetzungen von Zementen zu verwenden.It is known to be involved in drilling deep wells for the purpose of and gas extraction as filling material between bore and Probe tube to use a variety of compositions of cements.
Diese dienen ausschließlich der Stabilisierung der Bohrlochwand nach Beendigung des Bohrvorganges.These serve only for the stabilization of the borehole wall after completion of the drilling process.
Es
ist weiterhin bekannt, bei der Abteufung von Ölbohrungen
Bohrfluide mit graphitischen Kohlenstoffteilchen einzusetzen (
Aufgabe der Erfindung ist es, zwischen abgeteufter Bohrung und eingebrachtem Sondenrohr eine Hinterfüllung vorzusehen, die zum Zweck der maximalen Ausbeute der Erdwärme einen verlustarmen Wärmeübergang von der Erdformation zum Mantel des Sondenrohres ermöglicht, Vereisungen bei mit Wärmepumpen betriebenen Sonden-Systemen verhindert und gleichzeitig die durch Temperaturschwankungen verursachten Spannungen und Längenänderungen des Sondenrohres kompensiert.task The invention is between abgegetufter hole and introduced Probe tube to provide a backfill for the purpose the maximum yield of geothermal heat a low-loss Heat transfer from the earth formation to the mantle the probe tube allows icing with heat pumps powered probe systems while preventing the through Temperature fluctuations caused stresses and changes in length of the probe tube compensated.
Diese Aufgabe wird mit den Merkmalen des Patentanspruches 1 und den nachfolgenden Unteransprüchen 2 bis 5 gelöst.These Task is with the features of claim 1 and the following Subclaims 2 to 5 solved.
Vorteil der Erfindung ist, dass die Hinterfüllung mit einem überwiegend kohlenstoffhaltigen Material und/oder aus reinem Kohlenstoff und/oder aus Kohlenstoff-Metallverbindungen bestehenden Füllmaterial ein Wärmeleiter eingebracht wird, der durch seine gel-, pulver- oder pastöse Form alle Hohlräume, Klüfte und Spalten der Erdformation ausfüllt und den Mantel des Sondenrohres homogen vollflächig umschließt, so dass ein ungehinderter Wärmefluss von der Erdformation zum Sondenrohr erfolgen kann. Das eingebrachte Hinterfüllungsmaterial hat in Verbindung mit dem Ausdehnungsspeicher die Eigenschaft, temperaturbedingte Längs- und Querkontraktionen des Sondenrohres zu kompensieren, ohne das Wärmebrücken zwischen Erdformation und Sondenrohr entstehen.advantage The invention is that the backfill with a predominantly carbonaceous material and / or pure carbon and / or carbon-metal compound filler a heat conductor is introduced, which by its gel, powdery or pasty form all cavities, fractures and columns of earth formation fills and the mantle of Probe tube homogeneously encloses the entire surface, so that an unhindered heat flow from the earth formation can be done to the probe tube. The introduced backfill material has in connection with the expansion storage the property of temperature Compensate for longitudinal and transverse contractions of the probe tube without the thermal bridges between earth formation and Probe tube arise.
Zur Verbesserung der Fließfähigkeit der eingebrachten Füllmenge kann diese mit chemischen Additiven versetzte Erweichungsmittel vernetzt werden.to Improvement of the flowability of the introduced Filling quantity can offset these with chemical additives Softening agents are crosslinked.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispieles näher erläutert. In der zugehörigen Zeichnung zeigtThe Invention will be described below with reference to an embodiment explained in more detail. In the accompanying drawing shows
Das
Sonden-System besteht aus einer abgeteuften Bohrung
Das
verwendete wärmeleitende pulverisierte Füllmaterial
Die
Zirkulation des Wärmeübertragungsmediums
- 11
- abgeteufte Bohrungwells drilled drilling
- 22
- Sondenrohrprobe tube
- 33
- VerdrängerspitzeVerdrängerspitze
- 44
- wärmeleitendes Füllmaterialthermally conductive filling material
- 55
- Ausdehnungsspeicher für Füllmaterialexpansion memory for filling material
- 66
- WärmeübertragungsmediumHeat transfer medium
- 77
- Klüfte und Hohlräumeclefts and cavities
- 8.18.1
- Sondenstreckeprobe distance
- 8.28.2
- Sondenstreckeprobe distance
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 69632831 [0006] - DE 69632831 [0006]
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008052417A DE102008052417A1 (en) | 2008-10-21 | 2008-10-21 | Closed probe system for use with geothermal energy, particularly terrestrial heat from large depths, comprises sunk bore and probe tube arranged for transporting fluid heat transfer medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008052417A DE102008052417A1 (en) | 2008-10-21 | 2008-10-21 | Closed probe system for use with geothermal energy, particularly terrestrial heat from large depths, comprises sunk bore and probe tube arranged for transporting fluid heat transfer medium |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008052417A1 true DE102008052417A1 (en) | 2010-04-22 |
Family
ID=42035036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008052417A Withdrawn DE102008052417A1 (en) | 2008-10-21 | 2008-10-21 | Closed probe system for use with geothermal energy, particularly terrestrial heat from large depths, comprises sunk bore and probe tube arranged for transporting fluid heat transfer medium |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008052417A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69632831T2 (en) | 1995-12-15 | 2005-07-14 | Superior Graphite Co., Chicago | A method of controlling drilling fluid losses from an oil well |
-
2008
- 2008-10-21 DE DE102008052417A patent/DE102008052417A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69632831T2 (en) | 1995-12-15 | 2005-07-14 | Superior Graphite Co., Chicago | A method of controlling drilling fluid losses from an oil well |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OR8 | Request for search as to paragraph 43 lit. 1 sentence 1 patent law | ||
8105 | Search report available | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |