JP2004278866A - Heat collection piping unit for underground heat exchange system - Google Patents

Heat collection piping unit for underground heat exchange system Download PDF

Info

Publication number
JP2004278866A
JP2004278866A JP2003068777A JP2003068777A JP2004278866A JP 2004278866 A JP2004278866 A JP 2004278866A JP 2003068777 A JP2003068777 A JP 2003068777A JP 2003068777 A JP2003068777 A JP 2003068777A JP 2004278866 A JP2004278866 A JP 2004278866A
Authority
JP
Japan
Prior art keywords
pipe
flange
pipes
heat
heat collection
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.)
Pending
Application number
JP2003068777A
Other languages
Japanese (ja)
Inventor
Katsuhiro Nagura
克博 名倉
Yoshio Akiyama
良雄 秋山
Tamotsu Kurimoto
保 栗本
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.)
Tone Boring Co Ltd
Original Assignee
Tone Boring Co Ltd
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 Tone Boring Co Ltd filed Critical Tone Boring Co Ltd
Priority to JP2003068777A priority Critical patent/JP2004278866A/en
Publication of JP2004278866A publication Critical patent/JP2004278866A/en
Pending legal-status Critical Current

Links

Images

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
    • 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

Landscapes

  • 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)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat collection piping unit for an underground heat exchange system capable of facilitating the inserting operation into a bored hole and decreasing the initial investment cost of the system which uses the underground heat by enlarging the heat exchange capacity of heat collection pipes and turning them into a unit system. <P>SOLUTION: The heat collection piping unit 1 is structured so that 10-m long pipes 3 made of titanium or stainless steel are threaded through flanges 2 in doughnut shape furnished with an even number of pipe holes 30 in the circumferential arrangement. Because the pipes 3 are connected at each flange 2, one end of each pipe 3 is protruded from the flange while the other end is positioned inside the flange 2. The heat collection piping unit 1 for the bottom with the pipe ends coupled together by a U-pipe is inserted into the bored hole, and the unit connection is made in compliance with the hole depth. An O-ring 33 is fitted on the pipe ends on the side protruding from the flange 2, and the pipes 3 are secured to the flange 2 using a sleeve 35 having a taper 34. The flanges 2 are fixed to each other by bolts 25. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、地下１０ｍ〜１００ｍの地中の比較的浅い部分に存在する低温域の熱源を有効利用するものであり、地下の熱を有効に利用して融雪、暖房及び冷房等を効率よくおこなうための地中熱交換システム用採熱管ユニットに関する。
【０００２】
【従来の技術】
地球温暖化に対し、化石燃料に代わるエネルギーとしてクリーンな自然エネルギーが脚光を浴びている。
地下１０ｍ以下の温度は年間を通じてほぼ一定であり、エネルギー密度は低いが量的に期待できるエネルギー源である。
【０００３】
【特許文献１】
特開２００１−２８９５３３号公報（特許請求の範囲、要約、図１）
【０００４】
地中熱交換方式としては図８に示すように次の方式が挙げられる。
▲１▼二重管方式。
▲２▼Ｕチューブ方式。
▲３▼ＷＵチューブ方式。
二重管方式は、内管と外管の二重管から構成されており、内管の最下端からヒートポンプを通ってきた循環ブラインが外管に放出され、外管を通って再びヒートポンプに返送される循環方式である。なお、ブラインが外管から内管を通って循環する方式も可能である。
【０００５】
井戸方式は、ブラインの循環移動経路は二重管方式と同じであるが、内管に比較して外管が大きく、外管を通過するブラインを地表面付近では吸引する必要があるが、ブラインの循環形式の観点からは同じと見てよいものである。
【０００６】
Ｕチューブ方式は、二本の高密度ポリエチレンパイプをＵパイプで連結してあり、錘を付して削孔内に降ろし、パイプ周辺にグラウトを充填して固定したものであり、Ｕチューブ内にブラインを通して熱交換するものである。
【０００７】
ＷＵチューブ方式は、二組のＵチューブを直角に配置したものを削孔内に降ろし、パイプ周辺にグラウトを充填して固定するもので、ブラインをＷＵチューブ内に通して熱交換をおこなう方式である。
【０００８】
【発明が解決しようとする課題】
地中熱利用熱交換システムにおいて、削孔費用がかなりの割合を占めるので、削孔１本当たりの採熱効率を高め、削孔数を減少させることが必要である。また、熱交換の媒体である採熱管を流下するブラインの漏液に対する対策を講じ、安全性を確保し、更には採熱管の施工効率を高めて削孔１本当たりの施工コストを抑制する必要がある。
【０００９】
熱交換量は採熱管となるチューブ内を通過するブライン量とチューブ入口と出口の温度差の積に比例する。また、熱交換効率を高めるためには、熱伝導度の高い材質のチューブを使用するか、または、熱交換面積を大きくするためにチューブの表面積を大きくすると共に、断面積を大きくすることが必要である。
【００１０】
二重管方式は、Ｕチューブ方式やＷＵチューブ方式に比べ、同一径の削孔内ではブラインが流れる断面を最も大きくできるのでブライン量を最も大きくすることができる。しかし、ブライン流下断面がＵチューブ方式或いはＷＵチューブ方式の換算断面積と同じであると、表面積が小さいので熱交換量が小さくなる。従って、送ブライン量は多くすることができるが、熱交換容量がそれほど大きくならない。
また、二重管方式では、グラウト等の充填材の注入管を外管より外側に配置しなければならず、充填材注入管の分だけ外管を小さくしないと、削孔に挿入することができないという問題がある。
【００１１】
Ｕチューブ方式は、合成樹脂製のホースによって作られているので、継ぎ目がなく、止水性が高く、削孔内への設置が容易であるが、ブラインが通過する断面積が小さく、従って表面積も小さくなり、更に、チューブを構成する合成樹脂の熱伝導率が小さいので、総合的に熱交換率が低くなる。
【００１２】
ＷＵチューブ方式は、Ｕチューブと同じく、止水性・施工性に優れており、Ｕチューブの２倍の表面積を有するので比較的熱交換効率がよい。
しかし、従来の方式では採熱量が１０〜３０Ｗ／ｍ程度しか達成できず、熱交換効率が充分とはいえない。そのため、削孔深度を深くしたり、削孔本数を増やしたりして必要熱量を確保していたため、初期投資費用が増大する原因となっていた。
本発明は、採熱管の熱交換容量を大きくすると共に採熱管をユニット化することにより、削孔内への挿入作業を容易にし、地中熱を利用したシステムの初期投資費用を減少させようとするものである。
【００１３】
【課題を解決するための手段】
偶数本の耐腐食金属製パイプの両端部に周方向にパイプ用の穴が設けてある環状フランジが固定してあり、フランジを介してパイプを接続することにより、従来より多くの本数の採熱管を削孔内に挿入できるようにして採熱量を増大させた。
また、パイプの接続にはＯリングと、それを収容する拡径部を形成することによって接続作業を簡略化すると共に、漏液に対して安全性を高めた。
【００１４】
【実施例】
実施例１
採熱管ユニット１は、図１に示すように、図３の偶数個のパイプ穴３０が周方向に形成してあるドーナツ型のフランジ２にチタン製またはステンレス製のトラック輸送が可能な長さ４ｍ〜１０ｍのパイプ３を通したユニットである。パイプ３は、フランジ２において接続されるので、パイプ３の一端部はフランジから突出させてあり、他端はフランジ２内に位置する。採熱管ユニット１を削孔内に挿入した後、図３に示すフランジ２の中央部の穴２０を利用してグラウト注入管（図示しない）が削孔底まで配設される。
【００１５】
削孔底に設置する採熱管ユニットは、図２に示すように、対向するパイプ３の端部はＵ字管３１で連結してあり、ブラインが循環するようにしてある。そのため、削孔断面内にＷＵチューブ方式より多いパイプ３を配置することができ、循環ブライン量を増大させて地中熱交換システムの熱交換量を大きくすることができる。
【００１６】
図３に、フランジ２の平面図を示す。ユニット同士の接続は、フランジ２を接触させてボルト２５で接続する。
図４に接続状態を、図５にパイプ３の端部の詳細を示すように、パイプ３のフランジ２から突出する側の端部に凹部３２を形成し、Ｏリング３３を填め込んである。また、Ｏリングの後側にはパイプ３をフランジに固定するテーパー３４を有するスリーブ３５がパイプに填め込んである。接続相手側のユニットのパイプの先端部は、Ｏリングを収容できるように、拡径部３６が形成してある。パイプ３を接合したのち、フランジ２にボルト２５を取り付けてユニット同士を締結する。
万一、ブラインが漏れる場合には異なる二重の接合部を通過しなければならず、一回のボルトによる締結によって二重の水密構造が形成されるので、漏液に対して安全性が高い。
パイプ３が水密的に接続され、フランジ２同士はボルトで固定するものであるので、ユニットの増減によって削孔の深さに対応させることができる。
【００１７】
実施例２
実施例１は、フランジ２においてパイプ３を一端は突出させ、他端はフランジ内に位置するようにしてあるため、方向性を有し、製造に手間がかかるので、図６に示すように、パイプ３の両端部を拡径した拡径部３６としてフランジ２における構造を単一形式として経済的に製造できるようにした。
ユニットの接続は、両端にＯリングを取り付け、中央部に両側にテーパーを有するスリーブ３８が取り付けてある、接続パイプ３９をユニットの端部のパイプ３の拡径部３６に差し込み、テーパーの作用でパイプ３をフランジに固定する。
【００１８】
実施例３
実施例１は、ユニットの接合に方向性を有しているので、Ｏリング及びスリーブを取り付けているパイプと拡径部を有するパイプをフランジに固定する場合、円周方向の穴に交互に取り付けるようにすることにより、ユニットの方向性がなくなり、製造及び現場における接合が容易になる。
【００１９】
本発明の採熱管ユニット１を接続して削孔内に挿入した状態を図７に示す。
【００２０】
【発明の効果】
本発明では、採熱管として熱伝導率の大きな耐食性金属管を採用し、ユニット化することによって従来方法より多い本数の採熱管を削孔内に挿入できるようにして採熱量の増大を図った。
また、ユニットの長さをトラック等で運搬できる長さとし、フランジで簡単に接続できるようにし、長い採熱管を効率よく削孔に挿入設置できるようにした。
【図面の簡単な説明】
【図１】採熱管ユニットの斜視図。
【図２】Ｕ字管を設けた削孔底部用の採熱管ユニットを連結した斜視図。
【図３】フランジの平面図。
【図４】採熱管ユニットのフランジ部の断面図。
【図５】パイプの接合端部詳細を示す正面図。
【図６】採熱管ユニットのフランジ部の実施例２の断面図。
【図７】採熱管ユニットを削孔内に設置した状態の断面図。
【図８】採熱管の各種方式の斜視図。
【符号の説明】
１ 採熱管ユニット
２ フランジ
３ パイプ[0001]
TECHNICAL FIELD OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention effectively utilizes a low-temperature heat source existing in a relatively shallow part of the ground at a depth of 10 m to 100 m underground, and efficiently uses underground heat to efficiently perform snow melting, heating, cooling, and the like. Tube unit for an underground heat exchange system.
[0002]
[Prior art]
In response to global warming, clean natural energy has been spotlighted as an alternative to fossil fuels.
The temperature below 10m below the ground is almost constant throughout the year, and the energy density is low, but it is a promising energy source.
[0003]
[Patent Document 1]
JP 2001-289533 A (claims, abstract, FIG. 1)
[0004]
As the underground heat exchange system, the following system is exemplified as shown in FIG.
(1) Double tube system.
(2) U tube method.
(3) WU tube method.
The double-pipe system consists of a double pipe consisting of an inner pipe and an outer pipe, and the circulating brine that has passed through the heat pump from the lower end of the inner pipe is discharged to the outer pipe and returned to the heat pump again through the outer pipe. It is a circulation method. A system in which the brine circulates from the outer pipe through the inner pipe is also possible.
[0005]
In the well method, the brine circulation path is the same as that of the double pipe method, but the outer pipe is larger than the inner pipe, and the brine passing through the outer pipe needs to be suctioned near the ground surface. From the point of view of the cyclic form of.
[0006]
The U-tube method is a system in which two high-density polyethylene pipes are connected by a U-pipe, attached to a weight, lowered into a drilled hole, filled with grout around the pipe, and fixed. Heat exchange through brine.
[0007]
The WU tube method is a method in which two sets of U-tubes are placed at right angles, lowered into a hole, filled with grout around the pipe and fixed, and heat is exchanged by passing brine through the WU tube. is there.
[0008]
[Problems to be solved by the invention]
In the geothermal heat exchange system, the cost of drilling accounts for a considerable proportion, so it is necessary to increase the heat extraction efficiency per drilling and to reduce the number of drillings. In addition, measures must be taken to prevent leakage of brine flowing down the heat collection tube, which is a medium for heat exchange, to ensure safety, and to further increase the efficiency of the heat collection tube to reduce the construction cost per hole. There is.
[0009]
The amount of heat exchange is proportional to the product of the amount of brine passing through the tube serving as the heat collection tube and the temperature difference between the inlet and the outlet of the tube. In order to increase the heat exchange efficiency, it is necessary to use a tube made of a material with high thermal conductivity, or to increase the surface area of the tube and the cross-sectional area to increase the heat exchange area. It is.
[0010]
The double tube method can maximize the amount of brine since the cross section through which the brine flows can be maximized within the same diameter hole as compared with the U tube method and the WU tube method. However, if the brine cross-section is the same as the converted cross-sectional area of the U-tube method or the WU-tube method, the amount of heat exchange is reduced because the surface area is small. Therefore, the amount of brine sent can be increased, but the heat exchange capacity is not so large.
In addition, in the double-pipe system, the filling pipe for the filler such as grout must be arranged outside the outer pipe, and if the outer pipe is not made smaller by the filler filling pipe, it can be inserted into the drilled hole. There is a problem that can not be.
[0011]
The U-tube method is made of a synthetic resin hose, so it has no seams, has high water-blocking properties, and can be easily installed in a drilled hole. In addition, since the thermal conductivity of the synthetic resin constituting the tube is small, the overall heat exchange rate is low.
[0012]
The WU tube method is excellent in water stopping performance and workability, like the U tube, and has a relatively high heat exchange efficiency because it has twice the surface area of the U tube.
However, the conventional method can achieve only about 10 to 30 W / m of the amount of heat collected, and the heat exchange efficiency is not sufficient. For this reason, the required heat quantity was secured by increasing the drilling depth or increasing the number of drilling holes, thereby causing an increase in initial investment cost.
The present invention seeks to increase the heat exchange capacity of the heat collection tube and to unitize the heat collection tube, thereby facilitating insertion work into the borehole and reducing the initial investment cost of a system using ground heat. Is what you do.
[0013]
[Means for Solving the Problems]
An even number of corrosion-resistant metal pipes are fixed at both ends with annular flanges provided with holes for pipes in the circumferential direction, and by connecting the pipes through the flanges, a larger number of heat sampling tubes than before Was inserted into the drilled hole to increase the heat collection.
In addition, an O-ring and an enlarged-diameter portion for accommodating the O-ring are used for pipe connection, thereby simplifying the connection work and increasing safety against liquid leakage.
[0014]
【Example】
Example 1
As shown in FIG. 1, the heat collecting tube unit 1 has a donut-shaped flange 2 having an even number of pipe holes 30 formed in the circumferential direction in FIG. It is a unit that passes through a pipe 3 of 10 to 10 m. Since the pipe 3 is connected at the flange 2, one end of the pipe 3 projects from the flange, and the other end is located inside the flange 2. After the heat collection tube unit 1 is inserted into the drilling hole, a grout injection pipe (not shown) is arranged to the drilling bottom using the hole 20 at the center of the flange 2 shown in FIG.
[0015]
As shown in FIG. 2, in the heat collecting tube unit installed at the bottom of the drilling hole, the ends of the pipes 3 facing each other are connected by a U-shaped tube 31, so that the brine circulates. Therefore, it is possible to arrange more pipes 3 than in the WU tube method in the drilled cross section, and it is possible to increase the amount of circulating brine and increase the heat exchange amount of the underground heat exchange system.
[0016]
FIG. 3 shows a plan view of the flange 2. The units are connected by bolts 25 with the flanges 2 in contact.
As shown in FIG. 4 and the details of the end of the pipe 3 in FIG. 5, a concave portion 32 is formed in the end of the pipe 3 protruding from the flange 2 and an O-ring 33 is inserted therein. On the rear side of the O-ring, a sleeve 35 having a taper 34 for fixing the pipe 3 to the flange is fitted into the pipe. An enlarged diameter portion 36 is formed at the end of the pipe of the unit on the other end of the connection so that an O-ring can be accommodated. After joining the pipes 3, bolts 25 are attached to the flanges 2 to fasten the units.
In the unlikely event that brine leaks, it must pass through different double joints, and a single watertight structure is formed by fastening with one bolt, so it is highly safe against liquid leakage .
Since the pipes 3 are connected in a watertight manner and the flanges 2 are fixed with bolts, the number of units can be increased or decreased to correspond to the depth of the drilled hole.
[0017]
Example 2
In the first embodiment, since one end of the pipe 3 protrudes from the flange 2 and the other end is located inside the flange, the pipe 3 has directionality and takes much time and effort to manufacture. As shown in FIG. The structure of the flange 2 can be economically manufactured as a single unit as the enlarged diameter portion 36 in which both ends of the pipe 3 are enlarged.
The connection of the unit is performed by inserting a connecting pipe 39 into the enlarged diameter portion 36 of the pipe 3 at the end of the unit, wherein O-rings are attached to both ends, and sleeves 38 each having a taper on both sides are attached at the center. Fix the pipe 3 to the flange.
[0018]
Example 3
In the first embodiment, since the unit has directionality in joining the units, when the pipe having the O-ring and the sleeve and the pipe having the enlarged diameter portion are fixed to the flange, they are alternately mounted in the circumferential holes. By doing so, the directionality of the unit is lost, and the production and on-site joining are facilitated.
[0019]
FIG. 7 shows a state in which the heat collecting tube unit 1 of the present invention is connected and inserted into the hole.
[0020]
【The invention's effect】
In the present invention, a corrosion-resistant metal tube having a large thermal conductivity is adopted as a heat collection tube, and the heat collection amount is increased by unitizing the heat collection tube so that a larger number of heat collection tubes than the conventional method can be inserted into the drilled hole.
In addition, the length of the unit is set to a length that can be transported by truck or the like, so that it can be easily connected with a flange, and a long heat sampling tube can be inserted and installed in the drilled hole efficiently.
[Brief description of the drawings]
FIG. 1 is a perspective view of a heat collection tube unit.
FIG. 2 is a perspective view in which a heat sampling tube unit provided with a U-shaped tube for a drill hole bottom is connected.
FIG. 3 is a plan view of a flange.
FIG. 4 is a sectional view of a flange portion of the heat collection tube unit.
FIG. 5 is a front view showing details of a joint end of the pipe.
FIG. 6 is a sectional view of a flange portion of a heat collection tube unit according to a second embodiment.
FIG. 7 is a cross-sectional view of a state in which the heat collection tube unit is installed in the hole.
FIG. 8 is a perspective view of various types of heat collecting tubes.
[Explanation of symbols]
1 Heat sampling tube unit 2 Flange 3 Pipe

Claims (5)

偶数本の耐腐食金属製パイプの両端部に周方向にパイプ用の穴が設けてある環状フランジが固定してあり、フランジを介してパイプが接続可能である採熱管ユニット。A heat collection tube unit in which an even number of corrosion-resistant metal pipes are fixed at both ends with annular flanges having holes for the pipes in the circumferential direction, and the pipes can be connected via the flanges. 周方向にパイプ用の穴が設けてある環状フランジの対向する穴を結ぶようにＵ字パイプが取り付けてある採熱管ユニット。A heat collection tube unit in which a U-shaped pipe is attached so as to connect opposed holes of an annular flange provided with holes for pipes in a circumferential direction. 請求項１において、パイプの一端部にはＯリングを設けると共にテーパーを有するスリーブを取り付けてフランジに固定してあり、他端部はＯリングを収容可能な拡径部であり、フランジに固定している採熱管ユニット。In claim 1, an O-ring is provided at one end of the pipe, and a sleeve having a taper is attached to the pipe and fixed to the flange. The other end is an enlarged diameter portion capable of accommodating the O-ring and fixed to the flange. Has a sampling tube unit. 請求項１において、パイプの両端部が拡径してあり、両端部にＯリングを有し中央部に両側に向かうテーパーを有する接続用短管でパイプを接続する採熱管ユニット。2. The heat collection tube unit according to claim 1, wherein both ends of the pipe are enlarged, and the pipes are connected by connecting short pipes having O-rings at both ends and a taper toward both sides at the center. 請求項１において、一端にＯリング及び他端にスリーブを取り付けているパイプと拡径部を有するパイプを一本おきに交互にフランジに固定した採熱管ユニット。2. The heat collecting tube unit according to claim 1, wherein a pipe having an O-ring at one end and a sleeve at the other end and a pipe having an enlarged diameter portion are alternately fixed to a flange.
JP2003068777A 2003-03-13 2003-03-13 Heat collection piping unit for underground heat exchange system Pending JP2004278866A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003068777A JP2004278866A (en) 2003-03-13 2003-03-13 Heat collection piping unit for underground heat exchange system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003068777A JP2004278866A (en) 2003-03-13 2003-03-13 Heat collection piping unit for underground heat exchange system

Publications (1)

Publication Number Publication Date
JP2004278866A true JP2004278866A (en) 2004-10-07

Family

ID=33286018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003068777A Pending JP2004278866A (en) 2003-03-13 2003-03-13 Heat collection piping unit for underground heat exchange system

Country Status (1)

Country Link
JP (1) JP2004278866A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1978314A1 (en) * 2007-04-03 2008-10-08 Iride S.r.l. Geothermal probe
JP2009008342A (en) * 2007-06-28 2009-01-15 Nomoto Tetsutsugu Underground device in underground water heat utilization terrestrial facility
WO2013073294A1 (en) * 2011-11-17 2013-05-23 NAKAGOMI Hideki Spacer for heat exchange duct
JP2014185450A (en) * 2013-03-22 2014-10-02 Nippon Hume Corp Installation method of geothermal concrete foundation pile
CN104567485A (en) * 2014-12-26 2015-04-29 新奥科技发展有限公司 Tubular heat exchanger
CN105333243A (en) * 2015-11-18 2016-02-17 潘泉方 High pressure pipeline (functional combination through winding SUS304L pipes around GRP pipes)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1978314A1 (en) * 2007-04-03 2008-10-08 Iride S.r.l. Geothermal probe
JP2009008342A (en) * 2007-06-28 2009-01-15 Nomoto Tetsutsugu Underground device in underground water heat utilization terrestrial facility
WO2013073294A1 (en) * 2011-11-17 2013-05-23 NAKAGOMI Hideki Spacer for heat exchange duct
JP2013108217A (en) * 2011-11-17 2013-06-06 Hideki Nakagome Spacer for heat exchange duct
JP2014185450A (en) * 2013-03-22 2014-10-02 Nippon Hume Corp Installation method of geothermal concrete foundation pile
CN104567485A (en) * 2014-12-26 2015-04-29 新奥科技发展有限公司 Tubular heat exchanger
CN105333243A (en) * 2015-11-18 2016-02-17 潘泉方 High pressure pipeline (functional combination through winding SUS304L pipes around GRP pipes)

Similar Documents

Publication Publication Date Title
CN107939621B (en) S-CO based on geothermal energy of heating dry rock of fin sleeve 2 Power generation system and method
US7370488B2 (en) Geo-thermal heat exchanging system facilitating the transfer of heat energy using coaxial-flow heat exchanging structures installed in the earth for introducing turbulence into the flow of the aqueous-based heat transfer fluid flowing along the outer flow channel
KR100824419B1 (en) Structure for establishment in-case of heating exchange system using the geothermal
US20120211210A1 (en) Coaxial-flow heat transfer structure
JP5913119B2 (en) Low-energy system ground circuit
US7048037B2 (en) Geothermal heating and/or cooling apparatus and method of using same
US20170108290A1 (en) Collector
US8261551B2 (en) Energy producing device
KR101299826B1 (en) Depth geothermal system unit
CN209893671U (en) High-efficient geothermal utilization system based on closed loop heat medium pipe
JP2004278866A (en) Heat collection piping unit for underground heat exchange system
JP2014163554A (en) Construction method of heat exchange equipment of geothermal heat utilization system and geothermal heat utilization system
CN201066219Y (en) Down-hole heat exchanger heat pump system
KR100795336B1 (en) Heating exchanging system using the ground source
US10345051B1 (en) Ground source heat pump heat exchanger
CN104880104A (en) Underground corrugated pipe heat exchanging device for ground source heat pump heat exchanging system
JP2003302109A (en) Geothermal heat exchanger
US11022345B1 (en) Ground source heat pump heat exchanger
CN112815557A (en) Heat exchange sleeve device for efficiently exploiting geothermal resources and geothermal single well system
CN101672584A (en) Heat exchanger and oil well paraffin removal device with same
CN221349789U (en) Middle-deep U-shaped well geothermal heat exchanger
KR101822081B1 (en) Pipe assembly with coupling module for geothermal borehole
JP2016151253A (en) Wide area type geothermal power generating system
WO2018033991A1 (en) Wide-area geothermal power generation system
KR101200319B1 (en) Two pipe U-bend pipe spacer for small diameter pipe

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060119

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20060119

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20070119

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070619

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20071023