JPS6237646A - Taking geothermal energy out of earth through heat siphon - Google Patents

Taking geothermal energy out of earth through heat siphon

Info

Publication number
JPS6237646A
JPS6237646A JP60175161A JP17516185A JPS6237646A JP S6237646 A JPS6237646 A JP S6237646A JP 60175161 A JP60175161 A JP 60175161A JP 17516185 A JP17516185 A JP 17516185A JP S6237646 A JPS6237646 A JP S6237646A
Authority
JP
Japan
Prior art keywords
heat
siphon
water
heat siphon
geothermal energy
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
JP60175161A
Other languages
Japanese (ja)
Other versions
JPH0536698B2 (en
Inventor
Tadashi Hane
義 羽根
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.)
Shimizu Construction Co Ltd
Original Assignee
Shimizu Construction 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 Shimizu Construction Co Ltd filed Critical Shimizu Construction Co Ltd
Priority to JP60175161A priority Critical patent/JPS6237646A/en
Publication of JPS6237646A publication Critical patent/JPS6237646A/en
Publication of JPH0536698B2 publication Critical patent/JPH0536698B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To take geothermal energy out of earth efficiently and contrive long service life of the heat siphon by a method wherein water, containing acid- neutralizing agent, is poured into the hole of boring and the heat receiving section of the heat siphon is provided so as to be located in poured water. CONSTITUTION:The boring hole 10 is formed in a high-temperature rock body 7. Next, a boring gun is hung down into the tip end of the boring hole 10 to pour the water 12, containing acid-neutralizing agent, into the tip end of the boring hole 10. In this case,the amount of water is determined to a degree of dipping the heat receiving section of heat siphon sufficiently while the amount of acid-neutralizing agent is determined properly in accordance with the amount of acidic substance such as SO2 or the like which is generated out of the high- temperature rock body 7. Subsequently, the finned heat siphon 13 is installed. In this case, the heat receiving section 13a of the heat siphon 13 is installed so as to be dipped into the poured water 12 while the heat dissipating section 13b thereof is installed at a requested position on the earth.

Description

【発明の詳細な説明】 「産業上の利用分野」 この発明は熱水発生のない高温岩体の持つ地熱エネルギ
ーをヒートサイフオンを使って高効率に取出す方法に関
するものである。
DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method of highly efficiently extracting geothermal energy possessed by a high-temperature rock body that does not generate hydrothermal water using a heat siphon.

「従来の技術」 不発明者は、本願に先立って、熱水発生のない高温岩体
からも地熱エネルギーを取出すことを可能としたヒート
サイフオンを提供した(実願昭59−188247号)
。このヒートサイフオンは、第二図に示すように、ヒー
トサイフオン’ltlと保護骨2とから構成したもので
ある。
"Prior Art" Prior to the present application, the inventor provided a heat siphon that made it possible to extract geothermal energy even from high-temperature rock bodies that do not generate hydrothermal water (Utility Application No. 188247-1982).
. This heat siphon is composed of a heat siphon 'ltl and a protective bone 2, as shown in FIG.

上記ヒートサイフオン管1は、互いに直列に連結(溶接
)された多数の骨体計・・から構成されており、下端の
管体(受熱部)3aと上端の管体(放熱III)3bは
先端が閉塞されろとともに外周部分に受放熱用のフィン
が形成されている。このように形成されているヒートサ
イフオン管1の内部には、作動流体4が満たされている
The heat siphon tube 1 is composed of a large number of bone gauges connected (welded) in series, and the tube body (heat receiving part) 3a at the lower end and the tube body (heat dissipation III) 3b at the upper end are The tip is closed, and fins for receiving and dissipating heat are formed on the outer periphery. The interior of the heat siphon tube 1 formed in this manner is filled with a working fluid 4.

上記保護管2は、上記ヒートサイフオン管1を構成する
管体3・・・より大径の管体5・・・により構成されて
おり、互いに連結(溶接〕されるとともに、その上下端
の管体5b#52はそれぞれ前記管体3b、3aK溶接
されている。
The protective tube 2 is made up of a tube body 3 of a larger diameter that constitutes the heat siphon tube 1, and a tube body 5 with a larger diameter. The tube bodies 5b #52 are welded to the tube bodies 3b and 3aK, respectively.

上記ヒートサイフオン管1と保護管2との間は減圧真空
状態にされ、真空断熱層6となっている。
The space between the heat siphon tube 1 and the protection tube 2 is kept in a reduced pressure vacuum state, forming a vacuum heat insulating layer 6.

上記構成のヒートサイフオン装置を例えば高温岩体から
の熱採取に適用するには、まず、岩盤7にボーリングを
行ない、下端の管体3aK溶接により管体3・・・を次
々に連結すると同時に外側にも管体5 a s管体5・
・・を溶接し、高湿の合体へ降下させてゆく。そして、
下端の受熱11ffi3aが目的とする場所に到達した
ら、上端の管体3bおよび5bをそれぞれ溶接し、内部
を気密状態にする。次に管体3bの上端に真空ポンプを
連結し、ヒートサイフオン管1内部を真空にし、その後
、この真空状態のヒートサイフオン管1内部に作動流体
を注入し、内部を作動流体のみにより満たす。さらに、
保霞管2の上端の管体5bに真空ポンプを連結し、保6
92とヒートサイフオン骨1との間′fjr:真空状態
にし、プラグ用ストップパルプ8などにより封じ、真空
断熱/16を形成する。なお、図中符号9は管体3bに
設けたプラグ用ストップバルブを示すものである。
In order to apply the heat siphon device having the above configuration to, for example, heat extraction from a high-temperature rock body, first, boring is performed in the rock mass 7, and the tube bodies 3 are connected one after another by welding the tube bodies 3aK at the lower end. There is also a pipe body 5 on the outside.
Welded ... and descended into the high humidity coalescence. and,
When the heat receiving portion 11ffi3a at the lower end reaches the target location, the tube bodies 3b and 5b at the upper end are welded to make the inside airtight. Next, a vacuum pump is connected to the upper end of the tube body 3b to create a vacuum inside the heat siphon tube 1, and then a working fluid is injected into the vacuumed inside of the heat siphon tube 1 to fill the inside with only the working fluid. . moreover,
A vacuum pump is connected to the pipe body 5b at the upper end of the haze protection pipe 2, and the
92 and the heat siphon bone 1'fjr: A vacuum state is created and the space is sealed with plug stop pulp 8 or the like to form a vacuum insulation/16. Note that the reference numeral 9 in the figure indicates a plug stop valve provided in the tube body 3b.

上記構成によれば、熱の採取をヒートサイフオン管1内
11に封じ込めた作動流体41Cより行なっているので
、熱水のない高温岩体からの熱採取も容易に行なうこと
ができ、構造的に回収熱水の戻しが必要ないので、ボー
リングが一度で済み、イニシャルコストの低減作が図れ
る。
According to the above configuration, heat is extracted from the working fluid 41C sealed in the heat siphon tube 11, so heat can be easily extracted from a high-temperature rock body without hot water. Since there is no need to return the recovered hot water, boring is only required once, reducing initial costs.

「発明が解決しようとする問題点」 本発明者は、上記構成のヒートサイフオンによる高温岩
体の地熱エネルギー取出し方法を検討する内により効率
的に地熱エネルギーを取出すことができ、しかもヒート
サイフオンの寿命を延ばすことのできる方法を確立する
に至った。
"Problems to be Solved by the Invention" The inventor of the present invention has investigated a method for extracting geothermal energy from a high-temperature rock body using a heat siphon having the above configuration, and found that it is possible to extract geothermal energy more efficiently, and that the heat siphon We have now established a method that can extend the lifespan of.

「問題点を解決するための手段」 この発明に係るヒートサイフオンによる地熱エネルギー
の取出し方法は、高温岩体の熱放出を増大させるために
ボーリング孔先端内壁部分に多数の小孔または亀裂を形
成するとともに、高温岩体からヒートサイフオンの受熱
部への熱移動効率を向上させるために上記ボーリング孔
先端に水を注入し、さらに上記ヒートサイフオンの受熱
部が高温岩体から発生する801等の酸物質により劣化
されないようKm中和剤を予め上記注入水中に添加して
おくことを特徴とする方法である。
"Means for Solving the Problem" The method for extracting geothermal energy using a heat siphon according to the present invention involves forming a large number of small holes or cracks in the inner wall portion of the tip of a borehole in order to increase heat release from a high-temperature rock body. At the same time, in order to improve the efficiency of heat transfer from the high-temperature rock body to the heat receiving part of the heat siphon, water is injected into the tip of the borehole, and the heat receiving part of the heat siphon is generated from the high-temperature rock body, such as 801. This method is characterized in that a Km neutralizer is added in advance to the injection water to prevent it from being deteriorated by the acid substance.

「作 用」 上記方法によれば、高温岩体の熱放出量を小孔または亀
裂形成に伴う合体内壁部分の表面積増加により増大させ
ることができ、この熱を注入水により熱損失を低下させ
てヒートサイフオンの受熱部へ輸送することができ、し
かも酸中和剤により合体から発生する80.などの酸物
質を中和することができ、その結果、高い収率で地熱エ
ネルギーを取出すことができ、しかもヒートサイフオン
の寿命向上も図ることができる。
"Function" According to the above method, the amount of heat released from the high-temperature rock body can be increased by increasing the surface area of the inner wall of the coalescence due to the formation of small holes or cracks, and this heat can be absorbed by injected water to reduce heat loss. The 80. As a result, geothermal energy can be extracted with high yield, and the life of the heat siphon can also be extended.

次にこの発明を実施例によりさらに詳しく説明する。Next, this invention will be explained in more detail with reference to Examples.

「実施例」 本発明を実施するに当って、ます、第1図(alに示す
ように高温岩体7にボーリング孔10を形成する。次に
、このボーリング孔10の先端に穿孔ガン(Perfo
rating gun )を吊り下ろし、第1図(bl
に示すように、ボーリング孔10先端の内壁部分に多数
の小孔または亀裂11・・・を形成する。
"Example" In carrying out the present invention, a borehole 10 is first formed in a high-temperature rock body 7 as shown in FIG.
(rating gun) and lower the
As shown in FIG. 2, a large number of small holes or cracks 11 are formed in the inner wall portion of the tip of the borehole 10.

なお、この時使用する穿孔ガンは、外周に多数の小孔が
穿設された肉厚禦管中に爆薬が充填されてなるもので、
このkmを爆発させることにより周囲に多数の小孔また
は亀裂を形成できる器具である。このようにして、ボー
リング孔10先端の内壁部分に多数の小孔または亀裂1
1・・・を形成したら、第1図(C1に示すように、こ
のボーリング孔1゜先端内に酸中和剤入りの水12を注
入する。この時の水量は後述のビートサイフオンの受熱
部が充分浸漬する程度必要である。また、酸中和剤量は
高温岩体7から発生するSOl等の酸物質層に対応して
適宜決定する。水12の注入が完了したら、第1図(d
lに示すように、フィン付のヒートサイフオン13を上
記ボーリング孔10内に設置する。
The perforation gun used at this time consists of a thick walled tube with many small holes drilled around its outer periphery and filled with explosives.
It is a device that can create many small holes or cracks in the surrounding area by detonating this km. In this way, a large number of small holes or cracks 1 are formed in the inner wall portion at the tip of the borehole 10.
1... is formed, as shown in Figure 1 (C1), water 12 containing an acid neutralizer is injected into the 1° tip of this borehole. In addition, the amount of acid neutralizing agent is determined appropriately depending on the layer of acidic substances such as SOl generated from the high-temperature rock body 7.After the injection of water 12 is completed, as shown in FIG. (d
As shown in FIG. 1, a heat siphon 13 with fins is installed in the borehole 10.

この設置にあたっては、その受熱部13aが上記注入水
12中に浸漬するように行ない、その放熱部13bは地
表の所要位置に設置する。なお、このヒートサイフオン
13は、前記した従来提案の真空断熱層を形成したヒー
トサイフオンを採用した方が好ましいが、図に示すよう
に単に断熱材14を巻きつけたものでもよい。
In this installation, the heat receiving part 13a is immersed in the injection water 12, and the heat radiating part 13b is installed at a desired position on the ground surface. It is preferable that the heat siphon 13 is the heat siphon formed with the previously proposed vacuum heat insulating layer, but it may also be one in which a heat insulating material 14 is simply wrapped around the heat siphon 13 as shown in the figure.

しかして、上記方法によれば、高温岩体7の熱は、小孔
または亀裂により大きな接触面積で水12に伝えられ、
熱損失がたいへん少ない状態でヒートサイフオン13の
受熱部13aに供給される。従って、ヒートサイフオン
13の放熱部13bに冷風または冷水等を接触させるこ
とによりたいへん効率的な熱の取出しく従来の数百倍)
が可能となる。また、この時、水12の中には高温岩体
7から発生するSOl等の酸物質を中和するに光分なm
の酸中和剤が添加されているので、ヒートサイフオン1
3’に従来多用されているアル”ミニラム。
According to the above method, the heat of the high-temperature rock body 7 is transferred to the water 12 through a large contact area through the small holes or cracks,
The heat is supplied to the heat receiving section 13a of the heat siphon 13 with very little heat loss. Therefore, by bringing cold air, cold water, etc. into contact with the heat dissipation part 13b of the heat siphon 13, heat can be extracted very efficiently (several hundred times that of the conventional method).
becomes possible. Also, at this time, there is enough light in the water 12 to neutralize acid substances such as SOl generated from the high-temperature rock body 7.
Since the acid neutralizer is added, heat siphon 1
Al” minilam, which is commonly used for 3’.

銅、鉄、ステンレス等の材料から構成しても劣化される
ことがなく、ヒートサイフオン13の長寿6j化を図る
ことができる。
Even when made of materials such as copper, iron, and stainless steel, the heat siphon 13 will not deteriorate, and the lifespan 6j of the heat siphon 13 can be extended.

なお、上記酸中和剤としてNaU)J等の渭缶剤を用い
て注入後の水のpHを11程度にして、水12中に溶出
してくるシリカ分の処理を行なうことが望ましい。この
ようにすれば、水12中のシリカ分は下記式のようにケ
イ酸ナトリウムにかわり、水12中で安定となり、スケ
ールとしてヒートサイフオン13の受熱N15aに付着
することがなくなる。また、膏体7の熱によって水12
が濃縮されてしまう場合は、適宜ブローしてシリカIA
度の上昇を防止することが大切となる。
Note that it is desirable to use a neutralizing agent such as NaU)J as the acid neutralizer to adjust the pH of the water after injection to about 11 to treat the silica eluted into the water 12. In this way, the silica content in the water 12 changes to sodium silicate as shown in the following formula, becomes stable in the water 12, and does not adhere to the heat receiving N 15a of the heat siphon 13 as scale. In addition, water 12 is heated by the heat of the plaster 7.
If the silica is concentrated, blow it appropriately and remove the silica IA.
It is important to prevent the temperature from rising.

HISIOI + 2Na(JH→Na、8+U、+2
H,。
HISIOI + 2Na (JH→Na, 8+U, +2
H.

「発明の効果」 以上説明したように、本発明方法によれば、高温岩体の
熱放出間を小孔または亀裂形成に伴う合体内&廓分の表
面積増加により増大させることができ、この熱を注入水
により熱損失を低下させた状態でヒートサイフオンの受
熱部へ輸送することができ、しかも産生和剤により高温
岩体から発生するSOl等の酸物質を中和することがで
き、その結果、高い収率で地熱エネルギーを取出すこと
ができ、しかもヒートサイフオンの痔命向上も図ること
ができる。
"Effects of the Invention" As explained above, according to the method of the present invention, it is possible to increase the heat release period of high-temperature rock bodies by increasing the surface area of coalescence and distal portions due to the formation of small holes or cracks, and this can be transported to the heat-receiving part of the heat siphon with the heat loss reduced by injected water, and the produced additive can neutralize acid substances such as SOl generated from high-temperature rock bodies. As a result, it is possible to extract geothermal energy with high yield, and it is also possible to improve the hemorrhoid life of the heat siphon.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図(al〜(d)は、それぞれ本発明方法の一実施
例な示す工桿説明図、第2図は従来方法の一例を詩、明
するための構成図である。 7・・・・・・高温岩体、10・・・・・・ボーリング
孔、11・・・・・・小孔または亀裂、12・・・・・
・酸中和剤入りの水。 13・・・・・・ヒートサイフオン、13a・・山・受
熱部、13b・・・・・・放熱部。
Figures 1 (al to d) are explanatory diagrams showing one embodiment of the method of the present invention, and Figure 2 is a block diagram to explain an example of the conventional method.7... ...High temperature rock body, 10...Borehole, 11...Small hole or crack, 12...
・Water containing acid neutralizer. 13...Heat siphon, 13a...Mountain/heat receiving part, 13b...Heat radiation part.

Claims (1)

【特許請求の範囲】[Claims] 熱水発生のない高温岩体が持つ地熱エネルギーをヒート
サイフオンを使つて取出すヒートサイフオンによる地熱
エネルギーの取出し方法において、高温岩体に施こした
ボーリング孔先端内壁に穿孔ガンにより小孔または亀裂
を生じさせ、その後、このボーリング孔内に酸中和剤含
有水を所定量注入するとともに、このボーリング孔にヒ
ートサイフオンをその受熱部が前記注入水中に位置する
ように設置して熱の取出しを行なうことを特徴とするヒ
ートサイフオンによる地熱エネルギーの取出し方法。
A heat siphon is used to extract the geothermal energy possessed by a high-temperature rock body that does not generate hydrothermal water.In the method of extracting geothermal energy using a heat siphon, a small hole or crack is drilled into the inner wall of the tip of a borehole made in a high-temperature rock body using a drilling gun. After that, a predetermined amount of water containing an acid neutralizer is injected into this borehole, and a heat siphon is installed in this borehole so that its heat receiving part is located in the injected water to extract heat. A method for extracting geothermal energy using a heat siphon, which is characterized by performing the following.
JP60175161A 1985-08-09 1985-08-09 Taking geothermal energy out of earth through heat siphon Granted JPS6237646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60175161A JPS6237646A (en) 1985-08-09 1985-08-09 Taking geothermal energy out of earth through heat siphon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60175161A JPS6237646A (en) 1985-08-09 1985-08-09 Taking geothermal energy out of earth through heat siphon

Publications (2)

Publication Number Publication Date
JPS6237646A true JPS6237646A (en) 1987-02-18
JPH0536698B2 JPH0536698B2 (en) 1993-05-31

Family

ID=15991326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60175161A Granted JPS6237646A (en) 1985-08-09 1985-08-09 Taking geothermal energy out of earth through heat siphon

Country Status (1)

Country Link
JP (1) JPS6237646A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006307873A (en) * 2005-04-26 2006-11-09 Ashimori Ind Co Ltd Belt tightening tool

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56115495A (en) * 1979-12-28 1981-09-10 Inst Francais Du Petrole Method of producing terrestrial heat energy
JPS56127143A (en) * 1980-03-10 1981-10-05 Kawasaki Heavy Ind Ltd Heat pipe type subterranean heat pickup apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56115495A (en) * 1979-12-28 1981-09-10 Inst Francais Du Petrole Method of producing terrestrial heat energy
JPS56127143A (en) * 1980-03-10 1981-10-05 Kawasaki Heavy Ind Ltd Heat pipe type subterranean heat pickup apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006307873A (en) * 2005-04-26 2006-11-09 Ashimori Ind Co Ltd Belt tightening tool

Also Published As

Publication number Publication date
JPH0536698B2 (en) 1993-05-31

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