JP2003307352A - Underground heat exchanger - Google Patents
Underground heat exchangerInfo
- Publication number
- JP2003307352A JP2003307352A JP2002111430A JP2002111430A JP2003307352A JP 2003307352 A JP2003307352 A JP 2003307352A JP 2002111430 A JP2002111430 A JP 2002111430A JP 2002111430 A JP2002111430 A JP 2002111430A JP 2003307352 A JP2003307352 A JP 2003307352A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- heat
- heat exchanger
- underground heat
- heat medium
- 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
Links
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
- F24T10/17—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)
- Road Paving Structures (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】 本発明は、四季を通じて豊
富に存在する地中熱を利用して、空調、給湯、温水プー
ル、植物栽培、動物飼育あるいは融雪等を行うために使
用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、自然界に存在する熱エネル
ギーを利用して空調や給湯等に利用することが考えられ
ている。例えば、地下から熱水を汲み上げて、その熱水
を空調や給湯等に利用することもその一つである。しか
し、熱水を大量に汲み上げると地盤沈下等の大きな環境
問題が発生するため、充分な実用化が進んでいない。
【０００３】また、地中に熱交換器を構成する複数の埋
設管を埋設し、その埋設管に熱媒を送り、その熱媒と地
中熱との間で伝熱面を介して間接的に熱交換させ、地中
熱を採取する手段も考えられている。この手段は、地盤
沈下等の問題を誘発しないものの、火山地帯等を除く通
常の地域では地中熱の温度が高くないので、充分な熱量
を効果的かつ経済的に採取することが難しいといった問
題がある。
【０００４】すなわち、複数の埋設管を近接して埋設す
ると、各埋設管で採取できる熱量が必然的に低下してし
まう。逆に、離隔して埋設すると、各埋設管を連結する
ためのパイプを長く設定したり、多くのポンプを設ける
必要が生じる等、きわめて非経済的となる。
【０００５】
【発明が解決しようとする課題】従って、地盤沈下等の
環境問題を発生させることなく、効率的かつ経済的に地
中熱を採取して、それを空調や給湯等に利用することの
できる機器の出現が望まれる。
【０００６】本発明者は、こうした点に鑑み、独自に熱
交換器を創案し、かつ、その配置や熱媒の流量等につい
て研究を重ねた結果、満足できる結果を得ることができ
た。本発明は、そうした結果を基にしたものであり、効
果的かつ経済的に地中熱を採取することのできる地中熱
交換器を提供する。
【０００７】
【課題を解決するための手段】 図１および図２を参照
して説明する。本発明に係る地中熱交換器は、外径８０
〜１００ｍｍの外管２内に、外径４０〜６０ｍｍの内管
３を同心状に設けた同心二重管１を、複数、地中に垂直
に埋設し、熱媒を内管３の上端部から供給し、その下端
部で反転させて外管２内を上方に向かって通過させる際
に地中熱を採取する熱交換器において、前記複数の同心
二重管１の間隔Ｄを、最短でも５ｍに設定し、かつ、前
記熱媒の流量を毎分２０〜２５リットルに設定してな
る。
【０００８】
【発明の実施の形態】 本発明に係る地中熱交換湖の実
施形態を、図１および図２に示す。この地中熱交換器
は、外径９０ｍｍの硬質ポリエチレン製である外管２内
に、外径５６ｍｍの同じく硬質ポリエチレン製の内管３
を同心状に設けて同心二重管１を形成し、この同心二重
管１を、複数、地中に垂直に埋設している。
【０００９】各同心二重管１では、熱媒を内管３の上端
部から供給し、その下端部で反転させて外管２内を上方
に向かって通過させる際に地中熱を採取する。そして、
複数の同心二重管１の間隔Ｄを５ｍに設定し、かつ、熱
媒の流量を毎分２０リットルに設定している。
【００１０】なお、各同心二重管１にはボールバルブ６
およびエアー抜きバルブ７を設けており、また、その内
管３には熱媒供給管４を連通し、外管２には排出管５を
連通している。複数の同心二重管１同士は供給管４と排
出管５を介して連通し、その供給管４には２基の熱媒供
給ポンプ８を並列して設け、一方を予備としている。ま
た、供給管４と排出管５は、道路面の直下に配置され、
路上の雪を融かす放熱管９に連通している。２６は流量
計である。
【００１１】同心二重管１は、地中に縦孔を掘削して、
その縦穴に挿入した後、その周囲に珪砂１０を充填し、
その上部には断熱材１１を巻き、また、その断熱材１１
をセメントミルク１２で固めている。また、地中には基
礎コンクリート１３を打設し、その上にコンクリート桝
１４を設け、さらにコンクリート桝１４を蓋１５で覆う
と共に、その内壁に点検保守用のタラップ１６を設けて
いる。
【００１２】この地中熱交換器の作用について説明す
る。ポンプ８を駆動すると、熱媒供給管４内の熱媒が各
同心二重管１の内管３に送り込まれ、その内管３の下端
部で折り返して外管２（外管２と内管３との間部分）に
侵入し、そのまま上端部に向かって送られる。この際、
熱交換によって地中熱を採取する。
【００１３】地中熱を採取した熱媒は、排出管５を通っ
て放熱管９に達し、ここで地中熱を放熱した後、再び、
供給管４を通って同心二重管１に送られる。こうした循
環を繰り返し、採熱と放熱を連続的に交互に行う。
【００１４】この地中熱放熱管９においては、外径９０
ｍｍの外管２内に、外径５６ｍｍの内管３を設けて形成
した同心二重管１に熱媒を供給し、かつ、その同心二重
管１の間隔Ｄを５ｍとし、さらに、熱媒の流量を毎分２
０リットルに設定しているので、効果的かつ経済的に地
中熱を採取することができる。
【００１５】ちなみに、同心二重管１の間隔Ｄが５ｍ以
内であると、地中熱の温度が低下して充分な熱量を採取
することができず、また、５ｍを大きく越えると、複数
の同心二重管１を連結する供給管４および排出管５を必
要以上に長く設定する必要がある等して非経済的とな
る。さらに、外管２および内管３の外径をそれより大幅
に大きくして、熱媒の流量を多く設定すると、充分な熱
量を採取することができない。
【００１６】なお、図３に示すように、外径８０〜１０
０ｍｍの管本体１８の中心に隔壁１９を設けて二つの通
路２０を形成したＵ字管１７においても、同様に、その
間隔を最短でも５ｍに設定し、かつ熱媒の流量を毎分２
０〜２５リットルに設定すると良い。
【００１７】なお、ポンプ7は、商用電源の他に、太陽
熱発電装置や内燃機関発電装置によって稼動することが
できる。太陽光発電装置は、図４に示すように、ソーラ
ーパネル２１で太陽光を吸収し、蓄電池ボックス２２内
の蓄電池２４に、充電必要時に作動する制御基板２３を
介して蓄電し、コントローラー２５によって必要量の電
力をポンプ８へ供給する。
【００１８】
【発明の効果】本発明に係る地中熱放熱管９は、外径８
０〜１００ｍｍの外管２内に、外径４０〜６０ｍｍの内
管３を設けて形成した同心二重管１を地中に垂直に埋設
し、その中に熱媒を供給して地中熱を採取するものと
し、かつ、その同心二重管１の間隔Ｄを最短でも５ｍと
し、さらに、熱媒の流量を毎分２０リットルに設定して
いるので、効果的かつ経済的に地中熱を採取することが
できる。
【００１９】従って、この地中熱を利用して、地盤沈下
等の環境問題を誘発することなく、空調、給湯、温水プ
ール、植物栽培、動物飼育あるいは融雪等を行うことが
できる。Description: TECHNICAL FIELD The present invention relates to air conditioning, hot water supply, heated pools, plant cultivation, animal breeding, snow melting, etc., utilizing geothermal heat abundant throughout the four seasons. The present invention relates to an underground heat exchanger used for performing the heat treatment. Conventionally, utilization of heat energy existing in the natural world for air conditioning, hot water supply, and the like has been considered. For example, pumping hot water from underground and using the hot water for air conditioning, hot water supply and the like is one of them. However, if a large amount of hot water is pumped, a serious environmental problem such as land subsidence occurs, so that sufficient practical use has not been advanced. Further, a plurality of buried pipes constituting a heat exchanger are buried in the ground, a heat medium is sent to the buried pipes, and the heat medium is indirectly connected to the ground heat through a heat transfer surface. Means for exchanging heat and collecting geothermal heat are also being considered. Although this method does not induce problems such as land subsidence, it is difficult to collect sufficient heat effectively and economically because the temperature of geothermal heat is not high in ordinary areas except volcanic areas. There is. That is, when a plurality of buried pipes are buried in close proximity, the amount of heat that can be collected by each buried pipe is necessarily reduced. On the other hand, when buried apart from each other, it becomes extremely uneconomical, for example, it is necessary to set a long pipe for connecting the buried pipes or to provide many pumps. [0005] Accordingly, it is necessary to efficiently and economically collect underground heat without causing environmental problems such as land subsidence, and to use it for air conditioning and hot water supply. It is hoped that a device that can do this will appear. In view of these points, the present inventor has independently devised a heat exchanger, and has repeatedly studied the arrangement thereof, the flow rate of the heat medium, and the like, and as a result, was able to obtain satisfactory results. The present invention is based on such a result, and provides an underground heat exchanger capable of effectively and economically extracting underground heat. A description will be given with reference to FIGS. 1 and 2. The underground heat exchanger according to the present invention has an outer diameter of 80.
A plurality of concentric double pipes 1 having concentrically provided inner pipes 3 having an outer diameter of 40 to 60 mm are buried vertically in the ground within an outer pipe 2 of about 100 mm, and a heat medium is supplied to the upper end of the inner pipe 3. In the heat exchanger which collects geothermal heat when passing through the outer pipe 2 by inverting at the lower end thereof and passing through the outer pipe 2 at the lower end thereof, the interval D between the plurality of concentric double pipes 1 is set to be at least as short as possible. 5 m and the flow rate of the heat medium is set to 20 to 25 liters per minute. FIG. 1 and FIG. 2 show an embodiment of a geothermal heat exchange lake according to the present invention. The underground heat exchanger includes an outer tube 2 made of hard polyethylene having an outer diameter of 90 mm and an inner tube 3 made of hard polyethylene having an outer diameter of 56 mm.
Are formed concentrically to form a concentric double pipe 1, and a plurality of the concentric double pipes 1 are buried vertically in the ground. In each of the concentric double pipes 1, a heat medium is supplied from the upper end of the inner pipe 3, and is inverted at the lower end to collect the underground heat when passing through the outer pipe 2 upward. . And
The interval D between the plurality of concentric double tubes 1 is set to 5 m, and the flow rate of the heat medium is set to 20 liters per minute. Each concentric double pipe 1 has a ball valve 6
And an air release valve 7. The inner pipe 3 is connected to a heat medium supply pipe 4, and the outer pipe 2 is connected to a discharge pipe 5. The plurality of concentric double pipes 1 communicate with each other via a supply pipe 4 and a discharge pipe 5, and two heat medium supply pumps 8 are provided in parallel with the supply pipe 4, and one of them is used as a spare. In addition, the supply pipe 4 and the discharge pipe 5 are arranged immediately below the road surface,
It communicates with a radiator tube 9 that melts snow on the road. 26 is a flow meter. [0011] The concentric double pipe 1 excavates a vertical hole in the ground,
After being inserted into the vertical hole, the surroundings are filled with silica sand 10,
The heat insulating material 11 is wound on the upper part, and the heat insulating material 11
Is hardened with cement milk 12. In addition, a foundation concrete 13 is cast in the ground, a concrete tub 14 is provided thereon, and the concrete tub 14 is further covered with a lid 15 and a ramp 16 for inspection and maintenance is provided on the inner wall thereof. The operation of the underground heat exchanger will be described. When the pump 8 is driven, the heat medium in the heat medium supply pipe 4 is sent to the inner pipe 3 of each concentric double pipe 1, and is turned back at the lower end of the inner pipe 3 to form the outer pipe 2 (the outer pipe 2 and the inner pipe 2). 3) and is sent toward the upper end as it is. On this occasion,
Geothermal heat is collected by heat exchange. The heat medium from which the underground heat has been collected reaches the radiating pipe 9 through the discharge pipe 5, where the underground heat is radiated.
It is sent to the concentric double pipe 1 through the supply pipe 4. Such circulation is repeated, and heat collection and heat radiation are continuously and alternately performed. The underground heat radiation pipe 9 has an outer diameter 90.
A heating medium is supplied to a concentric double pipe 1 formed by providing an inner pipe 3 having an outer diameter of 56 mm inside an outer pipe 2 mm, and a distance D between the concentric double pipes 1 is set to 5 m. Medium flow rate 2 min
Since it is set to 0 liters, it is possible to effectively and economically collect geothermal heat. By the way, if the interval D between the concentric double tubes 1 is less than 5 m, the temperature of the underground heat decreases and it is not possible to collect a sufficient amount of heat. This is uneconomical because the supply pipe 4 and the discharge pipe 5 connecting the concentric double pipe 1 need to be set longer than necessary. Furthermore, if the outer diameters of the outer pipe 2 and the inner pipe 3 are made much larger than that and the flow rate of the heat medium is set large, a sufficient amount of heat cannot be collected. Incidentally, as shown in FIG.
Similarly, in the U-shaped tube 17 in which two partitions 20 are formed by providing the partition wall 19 at the center of the tube main body 18 of 0 mm, the interval is set to at least 5 m, and the flow rate of the heat medium is set to 2 / min.
It is good to set to 0-25 liters. The pump 7 can be operated by a solar thermal power generator or an internal combustion engine power generator in addition to a commercial power supply. As shown in FIG. 4, the solar power generation device absorbs sunlight with a solar panel 21, stores electricity in a storage battery 24 in a storage battery box 22 via a control board 23 that operates when charging is necessary, and requires a controller 25. An amount of power is supplied to the pump 8. The underground heat radiation pipe 9 according to the present invention has an outer diameter 8.
A concentric double pipe 1 formed by providing an inner pipe 3 having an outer diameter of 40 to 60 mm inside an outer pipe 2 having a diameter of 0 to 100 mm is buried vertically in the ground, and a heat medium is supplied therein to heat the ground. And the interval D between the concentric double tubes 1 is set to at least 5 m, and the flow rate of the heat medium is set to 20 liters per minute, so that the geothermal heat can be effectively and economically obtained. Can be collected. Therefore, air-conditioning, hot-water supply, hot-water pool, plant cultivation, animal breeding, snow melting and the like can be performed without inducing environmental problems such as land subsidence by using this underground heat.
【図面の簡単な説明】
【図１】 本発明に係る地中熱交換器の実施形態を示す
構成図である。
【図２】 図１に示す実施形態における同心二重管およ
びその周囲を示す正面断面図である（同心二重管のみを
拡大図示）。
【図３】 本発明に係る地中熱交換器の他の実施形態を
示す正面断面図である。
【図４】 本発明に係る地中熱利用放熱管装置のポンプ
を稼動する太陽熱発電装置のフローチャートである。
【符号の説明】
１ 同心二重管
２ 外管
３ 内管
４ 供給管
５ 排出管
６ ボールバルブ
７ エアー抜きバルブ
８ ポンプ
９ 放熱管
１０ 珪砂
１１ 断熱材
１２ セメントミルク
１３ 基礎コンクリート
１４ コンクリート桝
１５ 蓋
１６ タラップ
１７ Ｕ字管
１８ 管本体
１９ 隔壁
２０ 通路
２１ ソーラーパネル
２２ 蓄電池ボックス
２３ 制御基板
２４ 蓄電池
２５ コントローラー
２６ 流量計
Ｄ 間隔BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing an embodiment of an underground heat exchanger according to the present invention. FIG. 2 is a front sectional view showing a concentric double tube and its periphery in the embodiment shown in FIG. 1 (only the concentric double tube is enlarged). FIG. 3 is a front sectional view showing another embodiment of the underground heat exchanger according to the present invention. FIG. 4 is a flowchart of a solar thermal power generation device that operates a pump of the underground heat utilization heat radiation pipe device according to the present invention. [Description of Signs] 1 Concentric double pipe 2 Outer pipe 3 Inner pipe 4 Supply pipe 5 Drain pipe 6 Ball valve 7 Air release valve 8 Pump 9 Radiation pipe 10 Silica sand 11 Insulation material 12 Cement milk 13 Foundation concrete 14 Concrete basin 15 Lid 16 Trap 17 U-shaped tube 18 Tube main body 19 Partition wall 20 Passage 21 Solar panel 22 Battery box 23 Control board 24 Battery 25 Controller 26 Flow meter D Interval
【手続補正書】
【提出日】平成１５年２月２４日（２００３．２．２
４）
【手続補正１】
【補正対象書類名】明細書
【補正対象項目名】００１７
【補正方法】変更
【補正内容】
【００１７】なお、ポンプ８は、商用電源の他に、太陽
熱発電装置や内燃機関発電装置によって稼動することが
できる。太陽光発電装置は、図４に示すように、ソーラ
ーパネル２１で太陽光を吸収し、蓄電池ボックス２２内
の蓄電池２４に、充電必要時に作動する制御基板２３を
介して蓄電し、コントローラー２５によって必要量の電
力をポンプ８へ供給する。
【手続補正２】
【補正対象書類名】明細書
【補正対象項目名】図４
【補正方法】変更
【補正内容】
【図４】 本発明に係る地中熱交換器のポンプを稼動す
る太陽熱発電装置のフローチャートである。[Procedure amendment] [Date of submission] February 24, 2003 (2003.2.2
4) [Amendment 1] [corrected document name] specification [correction target item name] 0017 [correction method] change [correction content] [0017] In addition, the pump 8, in addition to the commercial power supply, Ya solar thermal power generation device It can be operated by an internal combustion engine power generator. As shown in FIG. 4, the solar power generation device absorbs sunlight with a solar panel 21, stores electricity in a storage battery 24 in a storage battery box 22 via a control board 23 that operates when charging is necessary, and requires a controller 25. An amount of power is supplied to the pump 8. [Procedure amendment 2] [Document name to be amended] Description [Item name to be amended] Fig. 4 [Correction method] Change [Content of amendment] [Fig. 4] Solar thermal power generation that operates the pump of the underground heat exchanger according to the present invention It is a flowchart of an apparatus.
Claims (1)
に、外径４０〜６０ｍｍの内管（３）を同心状に設けた
同心二重管（１）を、複数、地中に垂直に埋設し、熱媒
を内管（３）の上端部から供給し、その下端部で反転さ
せて外管（２）内を上方に向かって通過させる際に地中
熱を採取する熱交換器において、 前記複数の同心二重管（１）の間隔（Ｄ）を、最短でも
５ｍに設定し、かつ、前記熱媒の流量を毎分２０〜２５
リットルに設定してなる地中熱交換器。1. A concentric double pipe (1) having an inner pipe (3) concentrically provided with an outer diameter of 40 to 60 mm inside an outer pipe (2) having an outer diameter of 80 to 100 mm. , A plurality of them are buried vertically in the ground, the heat medium is supplied from the upper end of the inner pipe (3), and the heat medium is inverted at the lower end to pass upward through the outer pipe (2). In the heat exchanger for collecting heat, the interval (D) between the plurality of concentric double tubes (1) is set to at least 5 m, and the flow rate of the heat medium is 20 to 25 per minute.
Underground heat exchanger set to liter.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002111430A JP2003307352A (en) | 2002-04-15 | 2002-04-15 | Underground heat exchanger |
| CNB031207278A CN1238668C (en) | 2002-04-15 | 2003-03-18 | Geothermal heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002111430A JP2003307352A (en) | 2002-04-15 | 2002-04-15 | Underground heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003307352A true JP2003307352A (en) | 2003-10-31 |
Family
ID=29243272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002111430A Pending JP2003307352A (en) | 2002-04-15 | 2002-04-15 | Underground heat exchanger |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2003307352A (en) |
| CN (1) | CN1238668C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007321383A (en) * | 2006-05-31 | 2007-12-13 | Tekken Constr Co Ltd | Heat-exchange excavated pile and snow-melting equipment utilizing geothermal heat |
| JP2008002770A (en) * | 2006-06-23 | 2008-01-10 | Nippon Aaku Kaihatsu Kk | Device for planar air-conditioning |
| JP2011149690A (en) * | 2011-02-18 | 2011-08-04 | Nakamura Bussan Kk | Underground heat exchanger burying structure |
-
2002
- 2002-04-15 JP JP2002111430A patent/JP2003307352A/en active Pending
-
2003
- 2003-03-18 CN CNB031207278A patent/CN1238668C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007321383A (en) * | 2006-05-31 | 2007-12-13 | Tekken Constr Co Ltd | Heat-exchange excavated pile and snow-melting equipment utilizing geothermal heat |
| JP2008002770A (en) * | 2006-06-23 | 2008-01-10 | Nippon Aaku Kaihatsu Kk | Device for planar air-conditioning |
| JP2011149690A (en) * | 2011-02-18 | 2011-08-04 | Nakamura Bussan Kk | Underground heat exchanger burying structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1451928A (en) | 2003-10-29 |
| CN1238668C (en) | 2006-01-25 |
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