JP2005069508A - Subterranean heat exchanger - Google Patents

Subterranean heat exchanger Download PDF

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Publication number
JP2005069508A
JP2005069508A JP2003209357A JP2003209357A JP2005069508A JP 2005069508 A JP2005069508 A JP 2005069508A JP 2003209357 A JP2003209357 A JP 2003209357A JP 2003209357 A JP2003209357 A JP 2003209357A JP 2005069508 A JP2005069508 A JP 2005069508A
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Prior art keywords
well
heat exchanger
hot spring
heat
water
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Pending
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JP2003209357A
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Japanese (ja)
Inventor
Hitoshi Masuda
均 増田
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HOKURYO SANGYO KK
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HOKURYO SANGYO KK
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Priority to JP2003209357A priority Critical patent/JP2005069508A/en
Publication of JP2005069508A publication Critical patent/JP2005069508A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T10/20—Geothermal collectors using underground water as working fluid; using working fluid injected directly into the ground, e.g. using injection wells and recovery wells
    • 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
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a subterranean heat exchanger capable of avoiding increase of size of a system for sampling subterranean heat when sampling subterranean heat. <P>SOLUTION: This subterranean heat exchanger 20 is installed in an existing hot spring well 11 or water well to sample heat from the subterranean heat exchanger 20. This subterranean heat exchanger 20 is arranged inside a casing 21 in the hot spring well 11 or water well and is provided with a bottomed pipe 23 in which heat medium 22 is filled, a supply pipe 24 for supplying heat medium 22 into the bottomed pipe 23, and a pumping pipe 25 for pumping heat medium 22 from the supply pipe 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、温泉水を含む各種地中熱を採取する地中熱交換器に関するものである。
【０００２】
【従来の技術】
従来から、地中熱を採取する方法として、温泉井から温泉水を汲み上げ、この温泉水を建造物内に導入し、建造物の室内暖房用等に利用したり、あるいは地上に配設された地中熱交換器に導入して、温泉水の熱を利用する方法が知られている（例えば特許文献１参照）。
【０００３】
【特許文献１】
特開平７−３０５９００号公報
【０００４】
【発明が解決しようとする課題】
ところで、前記従来では、地上に汲み上げた温泉水を利用するものであるので、泉温・泉量の低下など種々の問題が生じる場合があり、最悪の場合は、この温泉井の利用ができなくなり、新たに温泉井を掘削する必要が生ずる場合があった。
【０００５】
この発明は、このような事情を考慮してなされたもので、前述した問題の発生を回避することができる地中熱交換器を提供することを目的とする。
【０００６】
【課題を解決するための手段】
前記課題を解決して、このような目的を達成するために、本発明は以下の手段を提案している。
請求項１に係る発明は、既設の温泉井または水井戸内に設置され、温泉熱または地中熱を採熱する構成とされたことを特徴とする。
請求項２に係る発明は、請求項１記載の地中熱交換器において、前記既設の温泉井または水井戸は、廃井または休止井であることを特徴とする。
請求項３に係る発明は、請求項１または２に記載の地中熱交換器において、内部に熱媒体が充填される有底管と、該有底管内に前記熱媒体を供給する供給管と、該供給管から供給された前記熱媒体を揚水する揚水管とを備え、前記温泉井または水井戸のケーシングの内部に設置される構成とされたことを特徴とする。
【０００７】
これらの発明に係る地中熱交換器によれば、既設の温泉井または水井戸内に設置するので、地中熱を採取することを目的として地盤を掘削して新たに井戸を得る工数を削除することができる。
また、前記地中熱交換器を既設の温泉井内に設置する場合には、温泉水の熱がケーシング内に配設された有底管に伝導し、この管内に充填された熱媒体に伝熱されることになる。従って、温泉水を地上に汲み上げることなく、温泉水の熱は熱媒体を介して高効率的に熱交換されるので、地中熱の採熱システムの大掛かり化を回避することができる。
一方、前記地中熱交換器を既設の水井戸に配設する場合には、飲料水を得る目的で水井戸を得たにもかかわらず、この水質が飲料用としては不適切である場合または水量不足である場合に、この水井戸を地中熱採取用に転換することが可能になり、このような水井戸を有効に活用することができる。
【０００８】
【発明の実施の形態】
以下、本発明に係る地中熱交換器の一実施形態を、図１及び図２を参照しながら説明する。
この地中熱交換器を備えた地中熱採取システム１０は、図１に示すように、既設の温泉井１１のケーシング２１の内部に地中熱交換器２０が設置された構成となっている。ここで、既設の温泉井１１として、廃井または休止井を使用する。
【０００９】
地中熱交換器２０は、温泉井１１のケーシング２１の内部に設置され、熱媒体２２としての不凍液または水が充填される有底管２３と、この有底管２３の内部に熱媒体２２を供給する供給管２４と、有底管２３内の熱媒体２２を揚水する揚水管２５とを備えている。なお、有底管２３は、温泉井１１の温水１２の中に一部が浸漬されて設置されている。
【００１０】
有底管２３は、図２に示すように、地面側から地中に向うに従って順次、フランジアダプタ部２３ｂと、直管部２３ａと、有底部２３ｃとが一体化された状態で配設され、これらの内部は連通状態とされている。なお、直管部２３ａの長さは、温泉井１１の深度に応じて適宜選択される。
【００１１】
このように構成された有底管２３は、フランジアダプタ２３ｂのフランジ部２３ｆの上下面を、２枚の板材２６が締結部材２７の締結力によって狭持することにより、有底管２３の上端開口面を密閉するとともに、この有底管２３を温泉井１１のケーシング２１の内部に吊下げ状態で固定するようになっている。ここで、フランジ部２３ｆの上面と板材２６との間には、パッキン２８が配設されており、これにより、有底管２３内に充填された熱媒体２２及びこの熱の漏洩を防止している。なお、有底管２３を構成する前記各構成要素は全て合成樹脂または金属等により形成されている。
【００１２】
供給管２４及び揚水管２５はともに、一方の端部が有底管２３内に開口し、他方の端部が図示しない冷熱機などと連結された構成とされ、熱媒体２２が有底管２３と前記冷熱機などとの間を循環できるようになっている。また、供給管２４及び揚水管２５の前記一方の端部は、有底管２３の上端面から挿入され、供給管２４の前記一方の端部は、有底管２３の上部位置に至らせて配置され、揚水管２５の前記一方の端部は、有底管２３の下端部位置にまで至らせて配置されている。
【００１３】
以上のように構成された地中熱採取システム１０は、ケーシング２１内に流入した温水１２の上面と、このケーシング２１の上端との間に断熱効果を有する空気層を備えているので、前記流入した温水１２を良好に保温することができ、これにより、供給管２４を介して有底管２３内に充填された熱媒体２２が確実に加熱されるとともに、この加熱された熱媒体２２を揚水管２５を介して回収することができる。すなわち、高効率に地中熱を回収することができる。
【００１４】
以上説明したように本実施形態による地中熱交換器によれば、既設の温泉井１１内に地中熱交換器２０を設置するので、地中熱を採取することを目的として地盤を掘削して新たに井戸を得る工数を削除することができる。
また、有底管２３が温泉水１２に浸漬されているので、温泉水１２の熱が、ケーシング２１内に配置された有底管２３を介して熱媒体２２に伝導されることになる。従って、温泉水１２を地上に汲み上げることなく、温泉水１２の熱を熱媒体２２を介して高効率に回収することができ、地中熱の採取システム１０の大掛かり化を回避することができる。
【００１５】
なお、本発明の技術的範囲は前記実施の形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。
例えば、前記実施形態においては、地中熱交換器２０を既設の温泉井１１内に配設したが、この温泉井１１に替えて水井戸内に配設してもよい。この場合においても、前記実施形態と同様に、地中熱を回収できる地中熱採取システムを低コストで構築することができる。また、この水井戸の場合は、飲料水を得る目的で水井戸を得たにもかかわらず、この水質が飲料用としては不適切である場合や水量が不足していた場合に、この水井戸を地中熱採取用に転換することが可能になり、このような水井戸を有効に活用することができる。
【００１６】
【発明の効果】
以上の説明から明らかなように、本発明に係る地中熱交換器によれば、既設の温泉井または水井戸内に前記地中熱交換器を設置するので、地中熱を採取することを目的として地盤を掘削して新たに井戸を得る工数を削除することができる。
【図面の簡単な説明】
【図１】本発明に係る一実施形態において、地中熱採取システムを示す側面断面図である。
【図２】図１に示す地中熱交換器の拡大側面断面図である。
【符号の説明】
１１ 既設の温泉井
２０ 地中熱交換器
２２ 熱媒体
２３ 有底管
２４ 供給管
２５ 揚水管[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an underground heat exchanger that collects various underground heat including hot spring water.
[0002]
[Prior art]
Conventionally, as a method of collecting geothermal heat, hot spring water is drawn from a hot spring well, and this hot spring water is introduced into a building and used for indoor heating of the building or disposed on the ground. A method of introducing heat into hot spring water by introducing it into a ground heat exchanger is known (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-305900
[Problems to be solved by the invention]
By the way, since the conventional method uses hot spring water pumped up on the ground, various problems such as a decrease in spring temperature and spring volume may occur. In the worst case, this hot spring well cannot be used. In some cases, it was necessary to drill new hot spring wells.
[0005]
The present invention has been made in view of such circumstances, and an object thereof is to provide a ground heat exchanger that can avoid the occurrence of the above-described problems.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve such an object, the present invention proposes the following means.
The invention according to claim 1 is characterized by being installed in an existing hot spring well or water well and configured to collect hot spring heat or underground heat.
The invention according to claim 2 is the underground heat exchanger according to claim 1, wherein the existing hot spring well or water well is an abandoned well or a dormant well.
The invention according to claim 3 is the underground heat exchanger according to claim 1 or 2, wherein the bottomed pipe is filled with a heat medium, and the supply pipe that supplies the heat medium into the bottomed pipe. And a pumping pipe that pumps up the heat medium supplied from the supply pipe, and is configured to be installed inside a casing of the hot spring well or water well.
[0007]
According to the underground heat exchangers according to these inventions, since they are installed in existing hot spring wells or water wells, the number of man-hours for newly excavating the ground for the purpose of collecting underground heat is deleted. can do.
Further, when installing the underground heat exchanger in an existing hot spring well, the heat of the hot spring water is conducted to the bottomed pipe disposed in the casing and is transferred to the heat medium filled in the pipe. Will be. Therefore, the heat of the hot spring water is exchanged with high efficiency through the heat medium without pumping the hot spring water to the ground, so that it is possible to avoid an increase in the heat collection system for the underground heat.
On the other hand, when the underground heat exchanger is installed in an existing water well, the water quality is inappropriate for drinking even though the water well is obtained for the purpose of obtaining drinking water. When the amount of water is insufficient, this water well can be converted for underground heat collection, and such a water well can be used effectively.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the underground heat exchanger according to the present invention will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1, the geothermal heat collection system 10 provided with this geothermal heat exchanger has a configuration in which a geothermal heat exchanger 20 is installed inside a casing 21 of an existing hot spring well 11. . Here, an abandoned well or a dormant well is used as the existing hot spring well 11.
[0009]
The underground heat exchanger 20 is installed inside the casing 21 of the hot spring well 11, and has a bottomed tube 23 filled with an antifreeze or water as the heat medium 22, and the heat medium 22 is placed inside the bottomed tube 23. A supply pipe 24 to be supplied and a pumping pipe 25 for pumping the heat medium 22 in the bottomed pipe 23 are provided. In addition, the bottomed tube 23 is partly immersed in the hot water 12 of the hot spring well 11 and installed.
[0010]
As shown in FIG. 2, the bottomed tube 23 is disposed in a state where the flange adapter portion 23b, the straight tube portion 23a, and the bottomed portion 23c are integrated in order from the ground side toward the ground. These interiors are in communication. Note that the length of the straight pipe portion 23 a is appropriately selected according to the depth of the hot spring well 11.
[0011]
The bottomed tube 23 configured as described above has an upper end opening of the bottomed tube 23 by holding the upper and lower surfaces of the flange portion 23f of the flange adapter 23b by the fastening force of the fastening members 27 between the two plate members 26. While sealing the surface, the bottomed tube 23 is fixed to the inside of the casing 21 of the hot spring well 11 in a suspended state. Here, a packing 28 is disposed between the upper surface of the flange portion 23f and the plate member 26, thereby preventing the heat medium 22 filled in the bottomed tube 23 and leakage of this heat. Yes. Note that all the constituent elements constituting the bottomed tube 23 are made of synthetic resin, metal, or the like.
[0012]
Both the supply pipe 24 and the pumping pipe 25 have a configuration in which one end opens into the bottomed pipe 23 and the other end is connected to a chiller or the like (not shown), and the heat medium 22 is connected to the bottomed pipe 23. Can be circulated between the air conditioner and the cooler. Further, the one end of the supply pipe 24 and the pumping pipe 25 is inserted from the upper end surface of the bottomed pipe 23, and the one end of the supply pipe 24 reaches the upper position of the bottomed pipe 23. It arrange | positions and the said one end part of the pumping-up pipe 25 is arranged to reach the lower end part position of the bottomed pipe 23.
[0013]
The geothermal heat collection system 10 configured as described above includes an air layer having a heat insulating effect between the upper surface of the hot water 12 flowing into the casing 21 and the upper end of the casing 21, so that the inflow Thus, the heat medium 22 filled in the bottomed tube 23 can be surely heated via the supply pipe 24, and the heated heat medium 22 can be pumped up. It can be recovered via the tube 25. That is, the underground heat can be recovered with high efficiency.
[0014]
As described above, according to the underground heat exchanger according to the present embodiment, since the underground heat exchanger 20 is installed in the existing hot spring well 11, the ground is excavated for the purpose of collecting underground heat. The man-hours for obtaining new wells can be deleted.
Moreover, since the bottomed tube 23 is immersed in the hot spring water 12, the heat of the hot spring water 12 is conducted to the heat medium 22 through the bottomed tube 23 disposed in the casing 21. Therefore, the heat of the hot spring water 12 can be recovered with high efficiency via the heat medium 22 without pumping the hot spring water 12 to the ground, and an increase in the size of the ground heat collection system 10 can be avoided.
[0015]
The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the underground heat exchanger 20 is disposed in the existing hot spring well 11, but may be disposed in the water well instead of the hot spring well 11. Even in this case, a geothermal heat collection system capable of recovering geothermal heat can be constructed at a low cost as in the above embodiment. In addition, in the case of this water well, even if the water well was obtained for the purpose of obtaining drinking water, this water well is used when the water quality is inappropriate for drinking or the amount of water is insufficient. Can be converted for ground heat collection, and such water wells can be used effectively.
[0016]
【The invention's effect】
As is clear from the above description, according to the underground heat exchanger according to the present invention, since the underground heat exchanger is installed in an existing hot spring well or water well, it is necessary to collect underground heat. The purpose of excavating the ground for the purpose can be deleted.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a geothermal heat sampling system in an embodiment according to the present invention.
FIG. 2 is an enlarged side cross-sectional view of the underground heat exchanger shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Existing hot spring well 20 Underground heat exchanger 22 Heat medium 23 Bottomed pipe 24 Supply pipe 25 Pumping pipe

Claims (3)

既設の温泉井または水井戸内に設置され、温泉熱または地中熱を採熱する構成とされたことを特徴とする地中熱交換器。A geothermal heat exchanger that is installed in an existing hot spring well or water well and is configured to collect hot spring heat or geothermal heat. 請求項１記載の地中熱交換器において、
前記既設の温泉井または水井戸は、廃井または休止井であることを特徴とする地中熱交換器。The underground heat exchanger according to claim 1,
The existing hot spring well or water well is a waste heat well or a dormant well. 請求項１または２に記載の地中熱交換器において、
内部に熱媒体が充填される有底管と、該有底管内に前記熱媒体を供給する供給管と、該供給管から供給された前記熱媒体を揚水する揚水管とを備え、
前記温泉井または水井戸のケーシングの内部に設置される構成とされたことを特徴とする地中熱交換器。The underground heat exchanger according to claim 1 or 2,
A bottomed pipe filled with a heat medium, a supply pipe for supplying the heat medium in the bottomed pipe, and a pumping pipe for pumping the heat medium supplied from the supply pipe,
A geothermal heat exchanger characterized in that it is configured to be installed inside a casing of the hot spring well or water well.
JP2003209357A 2003-08-28 2003-08-28 Subterranean heat exchanger Pending JP2005069508A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100752983B1 (en) * 2006-05-12 2007-08-30 한국수자원공사 Apparatus for exchanging earth-heat for earth-heat source heating pump system
JP2012117758A (en) * 2010-12-01 2012-06-21 Ohbayashi Corp Underground heat exchanger
JP2013108657A (en) * 2011-11-18 2013-06-06 Ohbayashi Corp Method for manufacturing underground heat exchanger of double pipe structure
JP2013108656A (en) * 2011-11-18 2013-06-06 Ohbayashi Corp Method for manufacturing underground heat exchanger of double pipe structure
CN109723401A (en) * 2017-10-27 2019-05-07 中国石油化工集团公司 The method that oilfield waste well is transformed into geothermal well

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100752983B1 (en) * 2006-05-12 2007-08-30 한국수자원공사 Apparatus for exchanging earth-heat for earth-heat source heating pump system
JP2012117758A (en) * 2010-12-01 2012-06-21 Ohbayashi Corp Underground heat exchanger
JP2013108657A (en) * 2011-11-18 2013-06-06 Ohbayashi Corp Method for manufacturing underground heat exchanger of double pipe structure
JP2013108656A (en) * 2011-11-18 2013-06-06 Ohbayashi Corp Method for manufacturing underground heat exchanger of double pipe structure
CN109723401A (en) * 2017-10-27 2019-05-07 中国石油化工集团公司 The method that oilfield waste well is transformed into geothermal well

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