DE4131989A1 - Extraction of heat from below ground - involves deep situated heat-exchangers heating cold water supplied from surface subsequently pumped back up to ground level - Google Patents

Extraction of heat from below ground - involves deep situated heat-exchangers heating cold water supplied from surface subsequently pumped back up to ground level

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Publication number
DE4131989A1
DE4131989A1 DE4131989A DE4131989A DE4131989A1 DE 4131989 A1 DE4131989 A1 DE 4131989A1 DE 4131989 A DE4131989 A DE 4131989A DE 4131989 A DE4131989 A DE 4131989A DE 4131989 A1 DE4131989 A1 DE 4131989A1
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Germany
Prior art keywords
heat
earth
extraction
cold water
ground
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Withdrawn
Application number
DE4131989A
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German (de)
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Heinrich Dr Lesker
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Individual
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Individual
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Priority to DE4131989A priority Critical patent/DE4131989A1/en
Publication of DE4131989A1 publication Critical patent/DE4131989A1/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24TGEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00Geothermal collectors
    • F24T10/10Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/40Geothermal heat-pumps
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/10Geothermal energy

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  • Engineering & Computer Science (AREA)
  • 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)
  • Other Air-Conditioning Systems (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The system extracts heat from the ground to provide heating and hot water in the temp. range 20 to 35 deg C. A heat exchanger (6) is set at least 500 m below ground level (0) at the bottom of a shaft (2) in which a pipe line is installed (1). Cold water is supplied through the pipe from the surface to the exchanger which heats it and returns it to the surface through heat insulated pipes (4,5) in which a pump is fitted. There may be more than one exchanger, and at different depths, the one at higher level acting as a booster. USE/ADVANTAGE - Extraction of heat from below ground. A distribution network for the hot water is established on the surface.

Description

Die Erfindung bezieht sich auf eine Anlage zur Gewinnung von Erdwärme für Heizungs- und Brauchwasser im Niedrigtemperaturbereich von etwa 20 bis 35°C mittels Wärmetauschern.The invention relates to a plant for the extraction of Geothermal energy for heating and domestic water in Low temperature range of about 20 to 35 ° C by means of Heat exchangers.

Der Erfindung liegt die Aufgabe zugrunde, Alternativen zur Gewinnung insbesondere von Heizenergie für Heizungs- und Brauchwasser zu ermöglichen. Zur Lösung dieser Aufgabe wird eine Anlage zur Gewinnung von Erdwärme gemäß Patentanspruch 1 vorgeschlagen. Die Erfindung ermöglicht die direkte Gewinnung der Erdwärme zur Lieferung von sogenannter Fernwärme für Heizungs- und Brauchwasser, insbesondere für den Wohnbereich.The invention has for its object alternatives to Obtaining heating energy for heating and To enable process water. To solve this problem a plant for the extraction of geothermal energy according to claim 1 suggested. The invention enables direct extraction of geothermal energy for the supply of so-called district heating for Heating and industrial water, especially for the living area.

Die Erfindung benutzt hierbei das Gesetz der kommunizierenden Röhren, wobei ein Rohr durch einen Schacht in die Erdtiefe geführt ist und eine kalte Flüssigkeit, z. B. Wasser, in die Tiefe transportiert. Die Druckfestigkeit der Rohre kann durch entsprechende Materialauswahl, die Sicherheit durch entsprechende Absperrorgane erreicht werden. Für den Fall, daß die Erdwärme aus sehr großen Tiefen gewonnen wird, kann es zweckmäßig sein, die Erwärmung stufenweise vorzunehmen, d. h. zwei Wärmetauscheranlagen in unterschiedlicher Tiefe, von der Erdoberfläche angerechnet, in Reihe zu schalten, wobei die erdtiefste Wärmetauscheranlage die darüberliegende Wärmetauscheranlage im Kreislauf speist und die höherliegende Wärmetauscheranlage wiederum bis an die Erdoberfläche geführt ist mit kaltem Zufluß und Rückleitung der erwärmten Flüssigkeit an das Verbrauchernetz. Da die Erdtemperatur mit größer werdender Erdtiefe zunimmt, sind die Wärmetauscheranlagen und die Zu- und Rückleitungen in eine solche Tiefe zu legen, in der die gewünschte Erwärmungstemperatur erreichbar ist. Die Wärmetauschanlagen werden dann in der Erdtiefe in Stollen oder Hohlkammern oder auch in parallelen Anordnungen verlegt, d. h. mehrere Wärmetauscheranlagen in einem Querstollen nebeneinander und auch mehrere Querstollen in einer Ebene mit entsprechenden Wärmetauschanlagen. Wärmetauscher zum Erwärmen von kalten Flüssigkeiten im Niedrigtemperaturbereich sind hinreichend bekannt, beispielsweise bei der Rückgewinnung von Wärme aus Abwassern. Die in den Wärmetauschern, die beispielsweise in Form von Schlangenleitungen geführt sind, erwärmte Flüssigkeit wird dann über wärmeisolierte Rohre wieder an die Erdoberfläche zurückgeführt und dann hier über ein Verteilernetz dem Verbraucher zugeführt. Da die warmen Flüssigkeiten leichter sind als kalte, ist ein Rückfluß der erwärmten Flüssigkeit im Prinzip automatisch gegeben, jedoch wird es vorteilhaft sein, zur Beschleunigung des Durchflusses und Rückflusses zusätzlich Pumpen insbesondere in der Rückleitung vorzusehen. Vorteilhafte Ausgestaltungen der Erfindung sind den kennzeichnenden Merkmalen der Ansprüche 2 bis 4 entnehmbar.The invention uses the law of communicating Tubes, one pipe through a shaft into the depth of the earth is performed and a cold liquid, e.g. B. water in the Transported depth. The pressure resistance of the pipes can be reduced by appropriate material selection, the security through appropriate shut-off devices can be reached. In case that geothermal energy is obtained from very great depths, it can be expedient to carry out the heating in stages, d. H. two heat exchanger systems at different depths, from the Earth surface credited to connect in series, the deepest heat exchanger system the one above Heat exchanger system feeds in the circuit and the higher one  Heat exchanger system in turn led to the surface of the earth is with cold inflow and return of the heated liquid to the consumer network. Because the earth temperature with greater As the depth of the earth increases, the heat exchanger systems and to lay the feed and return lines at such a depth in which the desired heating temperature can be reached. The Heat exchangers are then buried in tunnels or at depth Hollow chambers or laid in parallel arrangements, d. H. several heat exchanger systems side by side in a cross gallery and also several cross tunnels in one level with corresponding ones Heat exchange systems. Heat exchanger for heating cold Liquids in the low temperature range are sufficient known, for example in the recovery of heat from Sewage. The in the heat exchangers, for example in Form of serpentine leads, heated liquid is then brought back to the earth's surface via heat-insulated pipes returned and then here via a distribution network Fed to consumers. Because the warm liquids are lighter are considered cold, is a reflux of the heated liquid in the Principle given automatically, but it will be advantageous to accelerate the flow and backflow additionally Provide pumps in particular in the return line. Beneficial Embodiments of the invention are the characteristic Features of claims 2 to 4 can be removed.

Die Erfindung ist in der Zeichnung in Fig. 1 schematisch dargestellt. Von der Erdoberfläche 0 aus ist der Schacht 2 beispielsweise in einer Arbeitstiefe von 1000 m ins Erdinnere getrieben. Am tiefsten Punkt des Schachtes 2 zweigen Querstollen 10, 11 ab, in denen Kammern 6a, 6b usw. ausgebildet sind, in denen die Wärmetauschanlagen 10a, 10b usw. untergebracht sind. Durch den Schacht 2 führt das Rohr 1 in Pfeilrichtung P1 ins Erdinnere, durch dieses Rohr 1 wird kalte Flüssigkeit, z. B. Wasser, nach unten geleitet. Durch die im Bereich der Kammern 6a, 6b herrschende höhere Temperatur auf Grund der Erdwärme erfolgt die Erwärmung der durch den Wärmetauscher 10a geleiteten Flüssigkeit und diese kann dann durch das Rohr 4 der Rückleitung wieder in Pfeilrichtung P2 aufsteigen. Die Rohre 4 der Rückleitung sind mit einer Wärmeisolierung 5 umgeben. Heizsysteme können bereits mit Niedrigtemperaturen von ca. 30 bis 35°C arbeiten, so daß die Arbeitstiefe für die Wärmetauschanlagen 10a, 10b und die Schachtanlagen bei etwa 1000 m liegen könnte. Für erste Versuche eignen sich stillgelegte Bergbauanlagen. Zum Erreichen einer ausreichenden Menge an erwärmter Flüssigkeit für eine Dauerversorgung sind in Stollenbauweise mit Querstollen 13, 14 mehrere Wärmeaustauschanlagen zu kombinieren, die auch alternierend in Funktion treten können, Regulationssystem. Für die Wintermonate mit erhöhtem Energiebedarf ist es möglich, die Anlage zur Gewinnung von Erdwärme durch Speicher zu ergänzen, die in den Sommermonaten Wärme speichern und im Winter eventuell unter Nutzung von Wärmepumpen diese Energie wieder abgeben, um den entsprechenden Mehrbedarf zu decken. In die Rohrleitungen sind des weiteren Absperrorgane 9 an geeigneten Stellen eingebaut, insbesondere um die einzelnen parallel geschalteten Wärmetauschanlagen 10a, 10b im Bereich der Querstollen 13, 14 nach Bedarf zu- und abschalten zu können.The invention is shown schematically in the drawing in Fig. 1. From the surface 0 of the earth, the shaft 2 is driven into the interior of the earth, for example, at a working depth of 1000 m. At the lowest point of the shaft 2 branch cross tunnels 10 , 11 , in which chambers 6 a, 6 b etc. are formed, in which the heat exchange systems 10 a, 10 b etc. are housed. Through the shaft 2 , the tube 1 leads in the direction of arrow P1 into the interior of the earth, through this tube 1 cold liquid, for. B. water, directed downwards. Due to the higher temperature in the area of the chambers 6 a, 6 b due to the geothermal heat, the liquid passed through the heat exchanger 10 a is heated and this can then rise again through the pipe 4 of the return line in the direction of arrow P2. The pipes 4 of the return line are surrounded by thermal insulation 5 . Heating systems can already work at low temperatures of approx. 30 to 35 ° C, so that the working depth for the heat exchange systems 10 a, 10 b and the shaft systems could be around 1000 m. Decommissioned mining facilities are suitable for initial attempts. In order to achieve a sufficient quantity of heated liquid for a permanent supply, several heat exchange systems which can also function alternately are to be combined in a tunnel construction with transverse tunnels 13 , 14 , regulation system. For the winter months with increased energy requirements, it is possible to supplement the geothermal energy system with storage facilities that store heat in the summer months and, in winter, may use heat pumps to release this energy to cover the corresponding additional demand. Shut-off devices 9 are also installed in the pipelines at suitable points, in particular in order to be able to switch the individual heat exchange systems 10 a, 10 b in the region of the cross tunnels 13 , 14 on and off as required.

Bei mehreren Wärmetauschanlagen 10a, 10b sind entsprechende Rohrabzweigungen 1a von der Zufuhrleitung und 4a von der Rückführleitung vorzusehen.In the case of several heat exchange systems 10 a, 10 b, corresponding pipe branches 1 a from the supply line and 4 a from the return line are to be provided.

Es ist auch möglich, mehrere kommunizierende Wärmetauschanlagen in unterschiedlicher Tiefe in Schächten übereinander anzuordnen und miteinander zu kombinieren, um beispielsweise Probleme der Druckfestigkeit von Rohrleitungen zu überbrücken. Eine solche Zwischenstation Z mit einer Wärmetauschanlage 11 ist schematisch in der Fig. 1 angedeutet. In die Wärmetauschanlage 11 führt von der Erdoberfläche 0 eine Rohrleitung 110, in der kalte Flüssigkeit zum Wärmetauscher 11 transportiert wird und die im Wärmetauscher 11 erwärmte Flüssigkeit über die Rohrleitung 114, die mit der Wärmeisolierung 115 versehen ist, wieder zurück an die Erdoberfläche. Die Rohrleitungen sind beispielsweise in dem Schacht 12 angeordnet. Der Wärmetauscher 11 hingegen wird von einem tiefer gelegenen Wärmetauscher gespeist, der nicht dargestellt ist, wobei dieser tiefer gelegene Wärmetauscher über die Rohrleitung 120 mit dem abgekühlten Medium aus der Wärmetauschanlage 11 gespeist wird, die in dem tiefer im Erdreich gelegenen Wärmetauscher mittels der umgebenden Erdwärme erwärmt und über die Rohrleitung 124, die isoliert ist, wieder in die Wärmetauschanlage 11 zurückgeführt wird.It is also possible to arrange several communicating heat exchange systems at different depths in shafts one above the other and to combine them with one another, for example in order to bridge problems with the pressure resistance of pipelines. Such an intermediate station Z with a heat exchange system 11 is indicated schematically in FIG. 1. A pipe 110 leads from the surface 0 of the earth into the heat exchange system 11 , in which cold liquid is transported to the heat exchanger 11 and the liquid heated in the heat exchanger 11 via the pipe 114 , which is provided with the thermal insulation 115 , back to the surface of the earth. The pipes are arranged in the shaft 12 , for example. The heat exchanger 11, on the other hand, is fed by a lower-lying heat exchanger, which is not shown, this lower-lying heat exchanger being fed via the pipeline 120 with the cooled medium from the heat exchange system 11 , which heats up in the heat exchanger located deeper in the ground by means of the surrounding geothermal energy and is returned to the heat exchange system 11 via the pipeline 124 , which is insulated.

Die Wärmetauschanlagen werden in entsprechenden Stollensystemen und Schächten untergebracht, die auch gewartet werden können. Im übrigen können und sollten die Wärmetauschanlagen so ausgeführt sein, daß sie robust und über lange Jahre hinweg wartungsfrei sind.The heat exchange systems are in appropriate gallery systems and shafts that can also be serviced. Otherwise, the heat exchange systems can and should be designed to be sturdy and long lasting are maintenance-free.

Claims (4)

1. Anlage zur Gewinnung von Erdwärme und Heizungs- und Brauchwasser im Niedrigtemperaturbereich von etwa 20 bis 35°C, bei der Wärmetauscher (6) in einer Tiefe von mindestens 500 m, gerechnet ab Erdoberfläche, im Erdinnern angeordnet sind, wobei die Zuleitung zu den Wärmetauschern (6) von durch einen Schacht (2) in die Tiefe geführten Rohren (1), die von einer kalten in die Tiefe fließenden Flüssigkeit gespeist sind, gebildet ist und die Rückleitung von durch den Schacht an die Erdoberfläche geführten wärmeisolierten Rohren (4, 5) gebildet ist, die die erwärmte Flüssigkeit nach oben leiten, wo sie einem Verteilerrohrnetz zuführbar sind.1. Plant for the production of geothermal energy and heating and service water in the low temperature range of about 20 to 35 ° C, in which the heat exchanger ( 6 ) at a depth of at least 500 m, calculated from the earth's surface, are arranged in the interior of the earth, with the supply line to the Heat exchangers ( 6 ) are formed by pipes ( 1 ) which are led down through a shaft ( 2 ) and are fed by a cold liquid flowing into the depth, and the return line from heat-insulated pipes ( 4 , 5 ) is formed, which conduct the heated liquid upwards, where they can be fed to a distribution pipe network. 2. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß in der Rückleitung für die Rückführung der erwärmten Flüssigkeit mindestens eine Pumpe angeordnet ist.2. Plant according to claim 1, characterized in that in the return line for the Return of the heated liquid at least one pump is arranged. 3. Anlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mehrere Wärmetauscher in gleicher Tiefe in paralleler Schaltung zueinander angeordnet sind, die gegebenenfalls als Speicher benutzbar und alternierend abrufbar sind.3. Plant according to claim 1 or 2, characterized in that several heat exchangers in equal depth in parallel connection to each other are arranged, which can optionally be used as a memory and can be called up alternately. 4. Anlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß mindestens zwei Wärmetauscher in Reihe geschaltet in unterschiedlicher Tiefe, von der Erdoberfläche an gerechnet, angeordnet sind, so daß eine stufenweise Erwärmung der von der tiefsten Stelle in die Zwischenstation leitbaren erwärmten Flüssigkeiten durchführbar ist.4. Plant according to one of claims 1 to 3, characterized in that at least two heat exchangers connected in series at different depths, from the Earth's surface are arranged so that a gradual heating from the deepest point to the Intermediate conductive heated liquids is feasible.
DE4131989A 1991-09-26 1991-09-26 Extraction of heat from below ground - involves deep situated heat-exchangers heating cold water supplied from surface subsequently pumped back up to ground level Withdrawn DE4131989A1 (en)

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DE4131989A DE4131989A1 (en) 1991-09-26 1991-09-26 Extraction of heat from below ground - involves deep situated heat-exchangers heating cold water supplied from surface subsequently pumped back up to ground level

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DE4131989A DE4131989A1 (en) 1991-09-26 1991-09-26 Extraction of heat from below ground - involves deep situated heat-exchangers heating cold water supplied from surface subsequently pumped back up to ground level

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DE4131989A1 true DE4131989A1 (en) 1993-04-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007048561A1 (en) * 2007-10-09 2009-04-16 Hermann Josef Wilhelm Geothermal probe for production of geothermal energy, has lines provided with distributor such that fluid flows from lines by U-shaped probes in distributed manner, where tube sections of U-shaped probes are manufactured for heat transfer
EP2706897A1 (en) * 2011-05-09 2014-03-19 Fluor Technologies Corporation Safety shower water temperature control using geothermal energy

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE313257C (en) * 1900-01-01
CH389992A (en) * 1955-06-15 1965-03-31 Eberhard Ernst Geothermal energy utilization method
DE2429748A1 (en) * 1973-07-04 1975-01-23 Henri Chapuis DEVICE FOR AIR CONDITIONING A ROOM
CH586378A5 (en) * 1975-04-07 1977-03-31 Brunnschweiler Kurt Geothermal energy collector with sunk tubes - has vertical shaft with horizontal branches for steam generation
DE8008592U1 (en) * 1980-03-28 1980-09-04 Wilo Erd- Und Brunnenbohrungen, 3051 Hagenburg DEVICE FOR THE EXTRACTION OF EARTH HEAT
BE889155A (en) * 1981-06-10 1981-10-01 Dammekens Jozef HEAT PUMP
DE3029753A1 (en) * 1980-08-06 1982-02-25 Günter 4952 Porta Westfalica Strathe Underground heat extraction tube - has process water pumped into vertical pipe and forced out again through insulated inner pipe
US4741388A (en) * 1984-12-20 1988-05-03 Kazuo Kuroiwa Underground heat exchanging apparatus
EP0289718A2 (en) * 1987-05-04 1988-11-09 Instytut Techniki Budowlanej Method of and system for utilization of low temperature energy of geothermic heat from the waste rock of a mine
DE3801933A1 (en) * 1988-01-23 1989-08-03 Georg Knochel Method for absorbing geothermal energy using flowing water

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE313257C (en) * 1900-01-01
CH389992A (en) * 1955-06-15 1965-03-31 Eberhard Ernst Geothermal energy utilization method
DE2429748A1 (en) * 1973-07-04 1975-01-23 Henri Chapuis DEVICE FOR AIR CONDITIONING A ROOM
CH586378A5 (en) * 1975-04-07 1977-03-31 Brunnschweiler Kurt Geothermal energy collector with sunk tubes - has vertical shaft with horizontal branches for steam generation
DE8008592U1 (en) * 1980-03-28 1980-09-04 Wilo Erd- Und Brunnenbohrungen, 3051 Hagenburg DEVICE FOR THE EXTRACTION OF EARTH HEAT
DE3029753A1 (en) * 1980-08-06 1982-02-25 Günter 4952 Porta Westfalica Strathe Underground heat extraction tube - has process water pumped into vertical pipe and forced out again through insulated inner pipe
BE889155A (en) * 1981-06-10 1981-10-01 Dammekens Jozef HEAT PUMP
US4741388A (en) * 1984-12-20 1988-05-03 Kazuo Kuroiwa Underground heat exchanging apparatus
EP0289718A2 (en) * 1987-05-04 1988-11-09 Instytut Techniki Budowlanej Method of and system for utilization of low temperature energy of geothermic heat from the waste rock of a mine
DE3801933A1 (en) * 1988-01-23 1989-08-03 Georg Knochel Method for absorbing geothermal energy using flowing water

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Z: In Kombination mitWärmepumpe fast überall möglich. In: Sanitär- und Heizungstechnik, Bd.12, 1989, S.844-846 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007048561A1 (en) * 2007-10-09 2009-04-16 Hermann Josef Wilhelm Geothermal probe for production of geothermal energy, has lines provided with distributor such that fluid flows from lines by U-shaped probes in distributed manner, where tube sections of U-shaped probes are manufactured for heat transfer
EP2706897A1 (en) * 2011-05-09 2014-03-19 Fluor Technologies Corporation Safety shower water temperature control using geothermal energy
EP2706897A4 (en) * 2011-05-09 2014-09-17 Fluor Tech Corp Safety shower water temperature control using geothermal energy
US9993116B2 (en) 2011-05-09 2018-06-12 Fluor Technologies Corporation Safety shower water temperature control using geothermal energy

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