DE3047397A1 - Heat exchanger for extracting heat from underground water - consists of smooth plastics pipe inside corrugated steel pipe - Google Patents

Heat exchanger for extracting heat from underground water - consists of smooth plastics pipe inside corrugated steel pipe

Info

Publication number
DE3047397A1
DE3047397A1 DE19803047397 DE3047397A DE3047397A1 DE 3047397 A1 DE3047397 A1 DE 3047397A1 DE 19803047397 DE19803047397 DE 19803047397 DE 3047397 A DE3047397 A DE 3047397A DE 3047397 A1 DE3047397 A1 DE 3047397A1
Authority
DE
Germany
Prior art keywords
heat
pipe
corrugated pipe
groundwater
underground water
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.)
Granted
Application number
DE19803047397
Other languages
German (de)
Other versions
DE3047397C2 (en
Inventor
Hans 6520 Worms Würzburger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kabel- und Metallwerke Gutehoffnungshuette Ag 300
Original Assignee
Individual
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
Priority to DE3047397A priority Critical patent/DE3047397C2/en
Application filed by Individual filed Critical Individual
Priority to NL8120120A priority patent/NL8120120A/en
Priority to GB8137568A priority patent/GB2086564B/en
Priority to AT0902881A priority patent/AT380099B/en
Priority to JP56501348A priority patent/JPS57500570A/ja
Priority to CH8179/81A priority patent/CH655380A5/en
Priority to BR8108443A priority patent/BR8108443A/en
Priority to EP81901143A priority patent/EP0056806A1/en
Priority to PCT/DE1981/000060 priority patent/WO1981003061A1/en
Priority to AU71529/81A priority patent/AU7152981A/en
Priority to DK450981A priority patent/DK450981A/en
Priority to FI813491A priority patent/FI813491L/en
Publication of DE3047397A1 publication Critical patent/DE3047397A1/en
Application granted granted Critical
Publication of DE3047397C2 publication Critical patent/DE3047397C2/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/18—Pipes provided with plural fluid passages
    • 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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/08—Tubular elements crimped or corrugated in longitudinal section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/004—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using protective electric currents, voltages, cathodes, anodes, electric short-circuits
    • 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)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The heat pump which extracts heat from underground water uses a mixture of water and ethyl glycol as the heat transfer fluid. A bore-hole (7) is sunk through the top soil (2), the sand layer (3) and penetrates into the underground water (4). A corrugated pipe (10) of stainless steel with a closed end is inserted into the borehole and a smooth pipe of plastics e.g. polyethylene is inserted into the corrugated tube. The pump (9a) pumps the heat transfer fluid down the bore of the plastics pipe. The fluid returns via the annular space between the plastics inner pipe and the corrugated outer pipe and receives heat from the surrounding water and soil. The corrugations of the outer tube provide a large surface area to facilitate the heat transfer.

Description

Vorrichtung zur Entnahme von BodenwärmeDevice for extracting heat from the ground

Die Erfindung betrifft eine Vorrichtung zur Entnahme von Bodenwärme, insbesondere aus Grundwasser und/oder dem das Grundwasser umgebenden Erdreich, bei der die Wärme mittels einer Wärmepumpe einer Nutzung zugeführt wird, und bei der ein Wärmeaustauscher mit einem in einem geschlossenen Kreislauf umlaufenden Zwischenträgermedium vorgesehen ist, und der Kreislauf einerseits zur Anordnung unterhalb der Erdoberfläche in Kontakt mit dem Grundwasser und/oder dem feuchten Erdreich ausgebildet und andererseits mit der Primärseite einer außerhalb des Erdreichs anzuordnenden Wärmepumpe verbindbar ist, und der zum Kontakt mit dem Grundwasser und/ oder feuchten Erdreich ausgebildete Bereich ein Innenrohr aufweist, welches in ein dieses umschließendes Außenrohr mUndet, und das Außenrohr an seinem der Wärmepumpe abgewandten Ende abgeschlossen ist, und das Außenrohr als Wellrohr ausgebildet ist, entsprechend Patent .... (Patentanmeldung P 30 15 172.5).The invention relates to a device for removing ground heat, in particular from groundwater and / or the soil surrounding the groundwater to which the heat is fed to a use by means of a heat pump, and in which a heat exchanger with an intermediate carrier medium circulating in a closed circuit is provided, and the circuit on the one hand for arrangement below the surface of the earth formed in contact with the groundwater and / or the moist soil and on the other hand connectable to the primary side of a heat pump to be arranged outside the ground and that is designed to come into contact with groundwater and / or moist soil Area has an inner tube which opens into an outer tube surrounding it, and the outer tube is closed at its end facing away from the heat pump, and the outer pipe is designed as a corrugated pipe, according to patent .... (patent application P 30 15 172.5).

Hierbei ist vorteilhaft, daß der WärmeUbergang infolge der grdßeren Oberfläche des Wellrohres gegenüber einem glatten Rohr eine Verbesserung des Wirkungsgrades des Wärmeüberganges mit sich bringt. Als weiterer Vorteil des Wellrohres ergibt sich eine große seismische Belastungsfähigkeit. Während des Betriebes der Wänpesonde werden daher geologische Erdbewegungen durch die Flexibilität des Wellrohres abgefangen.It is advantageous here that the heat transfer due to the larger Surface of the corrugated pipe compared to a smooth one Pipe an improvement brings the efficiency of the heat transfer with it. Another advantage of the Corrugated pipe results in a large seismic load capacity. During operation the Wänpesonde are therefore geological earth movements due to the flexibility of the Corrugated pipe intercepted.

Der Erfindung liegt die Aufgabe zugrunde, die Erdsonde der eingangs genannten Art weiter zu verbessern.The invention is based on the object of the above-mentioned geothermal probe mentioned type to further improve.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, daß das Wellrohr über seine gesamte Länge einstückig ausgebildet ist. Gegenüber bekannten Erdsonden, bei denen Rohre bestimmter Länge erst an der Bohrstelle durch Verbindungsmuffen miteinander verbunden werden, hat dies den Vorteil, daß somit auch keine Undichtigkeiten an Verbindungsstellen auftreten können und es überdies nicht erforderlich ist, die Verbindungsstellen Jeweils einer DruckprUfung zu unterziehen.To solve this problem, the invention provides that the Corrugated pipe is formed in one piece over its entire length. Compared to known Geothermal probes in which pipes of a certain length are only at the drilling point through connecting sleeves are connected to one another, this has the advantage that there are no leaks can occur at connection points and, moreover, it is not necessary that the Connection points each to be subjected to a pressure test.

Das Wellrohr kann - etwa ähnlich einer Kabelverlegung - in seiner gesamten Länge an der Montagestelle von einer Holzhaspel abgespult und ohne zusätzliche Arbeiten in das Bohrloch eingeführt werden.The corrugated pipe can - similar to laying cables - in its the entire length at the assembly point from a wooden reel and without additional Works are introduced into the borehole.

Nach einem weiteren Merkmal der Erfindung kann vorgesehen sein, daß das Wellrohr eine Wellenform mit einer einem Kordelgewinde entsprechenden Gestaltung aufweist. Durch die somit spiralförmige Ausbildung des Wellrohres wird die in diesem befindliche Sohle in eine Turbulenz versetzt, die zu einem höchst gleichmäßigen Wärmeübergang führt.According to a further feature of the invention it can be provided that the corrugated pipe has a wave shape with a design corresponding to a cord thread having. Due to the spiral-shaped design of the corrugated pipe, the in this located sole in a turbulence that leads to a very even Heat transfer leads.

Zweckmäßigerweise besteht das Wellrohr aus legiertem Edelstahl. Auch dies trägt zu einem günstigen Wärmeübergang bei.The corrugated pipe is expediently made of alloyed stainless steel. Even this contributes to a favorable heat transfer.

Sollte das Wellrohr im tiefen Bereich mit Außensohlen oder mit durch Kupfer, Kohlensäure od. dgl. angereichertem Grundwasser in Verbindung kommen, können galvanische Ströme infolge Elementbildung gemessen werden. Die galvanische Spannung wird durch eine dem Wellrohr zugeordnete Potentialausgleichseinrichtung mit Opferanode ausgeglichen. Dadurch kann eine Lebensdauer von mehreren Jahrzehnten erreicht werden.Should the corrugated pipe in the deep area with outsoles or through Copper, carbonic acid or the like can come into contact with enriched groundwater Galvanic currents are measured as a result of element formation. The galvanic voltage is through a potential equalization device with a sacrificial anode assigned to the corrugated pipe balanced. As a result, a service life of several decades can be achieved.

Die Erfindung wird nachfolgend anhand des in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Die Figur zeigt eine schematische Darstellung des zum Kontakt mit dem Grundwasser und/oder feuchten Erdreiches ausgebildeten Bereiches des Wärmeaustauschers in seiner vorgesehenen Lage in einer Bohrung im Erdreich sowie ein Blockschaltbild einer Wärmepumpe und eines Heizkreislaufes eines Gebäudes.The invention is illustrated below with reference to the in the drawing Embodiment explained in more detail. The figure shows a schematic representation the area designed for contact with the groundwater and / or moist soil the heat exchanger in its intended position in a hole in the ground and a block diagram of a heat pump and a heating circuit of a building.

Im Erdreich 1 sei unterhalb des Mutterbodens 2 und einer Sandschicht 3 eine grundwasserführende Schicht vorhanden.In the soil 1 is below the topsoil 2 and a layer of sand 3 a groundwater-bearing layer is available.

In dieses Erdreich wird eine Bohrung 5 eingebracht. Ein insgesamt mit 6 bezeichneter Wärmeaustauscher weist einen Bereich 7 auf, der zum Einfahren in die Bohrung 5 vorgesehen ist. Der Bereich 7 weist ein Innenrohr 8 auf, welchem ein Zwischenträgewmedium von einer Zirkulationspumpe 9a entsprechend der Pfeilrichtung A zuführbar ist. Das Zwischenträgermedium tritt am unteren Ende 9b des vorzugsweise aus Kunststoff bestehenden Innenrohres aus und strömt in einem den eigentlichen Wär- metauscher bildenden und als Wellrohr ausgebildeten Außenrohr 10 in Pfeilrichtung B nach oben. Das Wellrohr 10 ist über seine gesamte Länge einstückig ausgebildet und besteht aus legiertem Edelstahl. Die Wellenform des Wellrohrs weist eine einem Kordelgewinde entsprechende Gestaltung auf. Der Wärmeaustauscher ist im übrigen mit der Primärseite 8 einer insgesamt mit 9 bezeichneten Wärmepumpe verbunden, deren sekundäre Seite 10 über Leitungen 11 und 12 mit einem Heizkreislauf 13 eines Gebäudes verbindbar ist. Ein Druckausgleichsgefäß ist mit 14 bezeichnet. Dem Wellrohr ist eine (nicht dargestellte) Potentialausgleichseinrichtung mit einer Opferanode zugeordnet.A hole 5 is drilled into this soil. A total with 6 designated heat exchanger has a region 7, which is for retraction is provided in the bore 5. The area 7 has an inner tube 8, which an intermediate carrier medium from a circulation pump 9a according to the direction of the arrow A can be supplied. The intermediate carrier medium occurs at the lower end 9b of the preferably made of plastic inner tube and flows in one of the actual Warmth Exchanger forming and designed as a corrugated pipe outer pipe 10 in the direction of arrow B upwards. The corrugated pipe 10 is in one piece over its entire length designed and made of alloyed stainless steel. The wave shape of the corrugated pipe has a design corresponding to a cord thread. The heat exchanger is otherwise connected to the primary side 8 of a heat pump designated as a whole with 9, whose secondary side 10 via lines 11 and 12 to a heating circuit 13 of a Building is connectable. A pressure equalization vessel is denoted by 14. The corrugated pipe is a (not shown) equipotential bonding device with a sacrificial anode assigned.

Die Funktion der Anordnung ist derart daß die im feuchten Erdreich bzw. Grundwasser enthaltene Wärme in dem gewellten Bereich des den eigentlichen Wärmeaustauscher bildenden Aussenrohres 10 auf das Zwischenträgermedium übergeht und in der Wärmepumpe 9 dem Zwischenträgermedium wieder entnommen wird. Da zwischen dem direkt mit dem Außenrohr in Kontakt stehenden Grundwasser bzw. feuchten Erdreich und dem.umgebenden Grundwasser bzw. feuchten Erdreich ständig eine Temperaturausgleich stattfindet, wird die durch das Zwischenträgermedium erfolgende Temperaturabsenkung kontinuierlich kompensiert. Es kommt hinzu, daß die Wärmepumpe diskontinuierlich arbeitet und während des Betriebs stillstandes ein weiterer Temperaturausgleich erfolgen kann.The function of the arrangement is such that in the moist soil or groundwater contained heat in the corrugated area of the actual Heat exchanger forming outer tube 10 passes over to the intermediate carrier medium and is removed again from the intermediate carrier medium in the heat pump 9. Between the groundwater or moist soil in direct contact with the outer pipe and the surrounding groundwater or moist soil, constant temperature equalization takes place, the temperature drop caused by the intermediate carrier medium continuously compensated. In addition, the heat pump is discontinuous works and a further temperature compensation during operation can be done.

Claims (4)

Vorrichtung zur Entnahme von Bodenwärme Zusatz zu P 30 15 172.5 PatentansprUche Vorrichtung zur Entnahme von Bodenwärme, insbesondere aus Grundwasser und/oder dem das Grundwasser umgebenden Erdreich, bei der die Wärme mittels einer Wärmepumpe einer Nutzung zugeführt wird, und bei der ein Wärmeaustauscher mit einem in einem geschlossenen Kreislauf umlaufenden Zwischenträgermedium vorgesehen ist, und der Kreislauf einerseits zur Anordnung unterhalb der Erdoberfläche in Kontakt mit dem Grundwasser und/oder dem feuchten Erdreich ausgebildet und andererseits mit der Primärseite einer außerhalb des Erdreichs anzuordnenden Wärmepumpe verbindbar ist, und der zum Kontakt mit dem Grundwasser und/oder feuchten Erdreich ausgebildete Bereich ein Innenrohr aufweist, welches in ein dieses umschließendes Außenrohr mündet, und das Aussenrohr an seinem der Wärmepumpe abgewandten Ende abgeschlossen ist, und das Außenrohr als Wellrohr ausgebildet, nach Patentanmeldung P 30 15 172.5, dadurch gekennzeichnet, daß das Wellrohr (10) Uber seine gesamte Länge ein stUckig ausgebildet ist. Device for the extraction of ground heat Addition to P 30 15 172.5 patent claims Device for extracting heat from the ground, in particular from groundwater and / or the the earth surrounding the groundwater, in which the heat is generated by means of a heat pump a use is supplied, and in which a heat exchanger with one in one closed circuit circulating intermediate carrier medium is provided, and the Circuit on the one hand for the arrangement below the earth's surface in contact with the Groundwater and / or the moist soil formed and on the other hand with the Primary side of a heat pump to be arranged outside the ground can be connected, and the one designed for contact with the groundwater and / or moist soil Area has an inner tube which opens into an outer tube surrounding it, and the outer pipe is closed at its end facing away from the heat pump, and the outer pipe designed as a corrugated pipe, according to patent application P 30 15 172.5, characterized in that the corrugated pipe (10) over its entire length in pieces is trained. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Wellrohr (10) eine Wellenform mit einer einem Kordelgewinde entsprechenden Gestaltung aufweist.2. Apparatus according to claim 1, characterized in that the corrugated pipe (10) has a wave shape with a configuration corresponding to a cord thread. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Wellrohr aus legiertem Edelstahl besteht.3. Apparatus according to claim 1 or 2, characterized in that the corrugated pipe is made of alloyed stainless steel. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß dem Wellrohr (10) eine Potentialausgleichseinrichtung mit einer Opferanode zugeordnet ist.4. Apparatus according to claim 3, characterized in that the corrugated pipe (10) a potential equalization device with a sacrificial anode is assigned.
DE3047397A 1980-04-19 1980-12-16 Device for extracting ground heat Expired DE3047397C2 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
DE3047397A DE3047397C2 (en) 1980-12-16 1980-12-16 Device for extracting ground heat
PCT/DE1981/000060 WO1981003061A1 (en) 1980-04-19 1981-04-18 Device for recovering heat from underground water and/or from the soil adjoining the underground water
AT0902881A AT380099B (en) 1980-04-19 1981-04-18 DEVICE FOR TAKING SOIL HEAT FROM THE GROUNDWATER AND / OR THE GROUNDWATER SURROUNDING THE GROUNDWATER
JP56501348A JPS57500570A (en) 1980-04-19 1981-04-18
CH8179/81A CH655380A5 (en) 1980-04-19 1981-04-18 DEVICE FOR TAKING SOIL HEAT FROM THE GROUNDWATER AND / OR THE GROUNDWATER SURROUNDING THE GROUNDWATER.
BR8108443A BR8108443A (en) 1980-04-19 1981-04-18 INSTALLATION FOR THE REMOVAL OF HEAT FROM THE SOIL FROM THE UNDERGROUND WATER AND / OR FROM THE TERRESTRIAL REGION THAT INVOLVES THE UNDERGROUND WATER AND / OR FROM THE TERRESTRIAL REGION THAT INVOLVES THE UNDERGROUND WATER
NL8120120A NL8120120A (en) 1980-04-19 1981-04-18 Circular shower head assembly - has annular water distribution channel with outlets designed to prevent prolonged dripping on turning off
GB8137568A GB2086564B (en) 1980-04-19 1981-04-18 Device for recovering heat from underground water and/or from the soil adjoining the underground water
AU71529/81A AU7152981A (en) 1980-04-19 1981-04-18 Device for recovering heat from underground water and/or fromsoil adjoining the underground water
EP81901143A EP0056806A1 (en) 1980-04-19 1981-04-18 Device for recovering heat from underground water and/or from the soil adjoining the underground water
DK450981A DK450981A (en) 1980-04-19 1981-10-12 APPLICATION FOR EXTRACTION OF GROUND WATER FROM GROUNDWATER AND OR GROUNDWATER ENVIRONMENTAL AREA
FI813491A FI813491L (en) 1980-04-19 1981-11-05 RELEASE FOR RELEASE OF OIL GRADE AND OVER GRILL OVER RING

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3047397A DE3047397C2 (en) 1980-12-16 1980-12-16 Device for extracting ground heat

Publications (2)

Publication Number Publication Date
DE3047397A1 true DE3047397A1 (en) 1982-07-08
DE3047397C2 DE3047397C2 (en) 1987-05-07

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Application Number Title Priority Date Filing Date
DE3047397A Expired DE3047397C2 (en) 1980-04-19 1980-12-16 Device for extracting ground heat

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006026531B3 (en) * 2006-03-11 2007-09-20 Strebe, Angelika Ground probe for recovering heat, has pipes arranged concentrically around central pipe and connected with each other, where probe is made of stainless steel and sum of nominal sizes of all pipes is larger than nominal size of central pipe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE156821C (en) *
US3648767A (en) * 1967-07-26 1972-03-14 Thermo Dynamics Inc Temperature control tube
DE2351566B2 (en) * 1973-10-13 1975-12-04 Ludwig 1000 Berlin Hoessle Method for monitoring sacrificial anodes as well as device, design and arrangement of sacrificial anodes for carrying out the method
DE8010743U1 (en) * 1980-04-19 1980-08-28 Wuerzburger, Hans, 6520 Worms DEVICE FOR TAKING SOIL HEAT
DE2913333A1 (en) * 1979-04-03 1980-10-16 Landes Klaus Dr Heat pump heat exchanger - has heat conductive support for pipe driven vertically into ground
DE2923084A1 (en) * 1979-06-07 1980-12-11 Friedrich Hensberg Deep earth heat recovery drilling assembly - has wire helical spring counter-rotating in tube to force rod against tip

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE156821C (en) *
US3648767A (en) * 1967-07-26 1972-03-14 Thermo Dynamics Inc Temperature control tube
DE2351566B2 (en) * 1973-10-13 1975-12-04 Ludwig 1000 Berlin Hoessle Method for monitoring sacrificial anodes as well as device, design and arrangement of sacrificial anodes for carrying out the method
DE2913333A1 (en) * 1979-04-03 1980-10-16 Landes Klaus Dr Heat pump heat exchanger - has heat conductive support for pipe driven vertically into ground
DE2923084A1 (en) * 1979-06-07 1980-12-11 Friedrich Hensberg Deep earth heat recovery drilling assembly - has wire helical spring counter-rotating in tube to force rod against tip
DE8010743U1 (en) * 1980-04-19 1980-08-28 Wuerzburger, Hans, 6520 Worms DEVICE FOR TAKING SOIL HEAT

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MAHLBACHER, T.: Betrachtungen eines Kollektortyps einer Erdreichwärmepumpenanlage, In: Elektrowärme im Technischen Ausbau (eta), Editition A der Zeitschrift elektrowärme international, Vulkan-Verlag, Essen, 37, November A 6/1979, S. A 368 u. A 369 *

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