著者

福田 道博 牛島 恵輔 中垣 長睦 El-Qady GAD Jose Salvador Handal CANDRAY Omar Gilberto Flores BELTETON Edi SUHANTO Barrack Peter OUMA Corona Ruiz MARTIN Jesda WONGSAVASDI Siriporn SOONGPANKHAO Musa BURCAK Ke Hu

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.22, no.3, pp.187-209, 2000-07-25 (Released:2010-02-05)

著者

鴇田 洋行 ロバト エンリケ リマ 糸井 龍一 本山 達也

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.28, no.1, pp.77-93, 2006

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The mass flow rate of steam transported into a turbine for geothermal power plant is controlled by the discharge characteristics of production wells and their wellhead pressures, which are, in turn, influenced by not only reservoir properties, but also pressure loss occurred along pipelines during transportation. In order to calculate the pressure loss in the pipeline network a fluid-gathering pipeline simulator named TPGS (Two-Phase Gathering System), which treats the pipeline network, has been developed. In addition, a simulation method to individually couple a wellbore simulator and a fluid-gathering pipeline simulator to a reservoir simulator has been constructed to predict the generating power output. TOUGH2, MULFEWS, and TPGS are the reservoir, wellbore, and fluid-gathering pipelinesimulators, respectively, used for the coupled simulation. This method was applied to predict changes of power output of the Hatchobaru power plant, Japan, overtime. The simulation includes a total length of 4.7km pipeline networks. Predicted changes of power output gave good agreement with the actual power decline trend, meaning the successful coupling of three simulators. Furthermore, the decrease in wellhead pressures and discharge rates of some production wells due to reservoir cooling was predicted. On the other hand, both simulated pressures at wellheads of production wells and at interconnection pipelines were predicted to besmaller by 20% than the actual pressures. This shows that the pressure losses atpipelines calculated by TPGS are underestimated. It is concluded, therefore, that values of surface roughness of the pipelines and correction factors for calculating pressure losses at fittings of pipelines requires some modification to increase the accuracy for TPGS.

著者

リー テジョン ソン ユンホ

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.34, no.4, pp.207-213, 2012

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韓国での地熱利用は最近の10 年間に著しい成長をとげた。中でも地中熱ヒートポンプ(GHP)が際立っており,それは主として,さまざまな補助金制度,研究開発への支出,新エネルギー・再生可能エネルギー利用を公的機関に義務づける法令,電力料金定額制度等を含む,強力な政府支援によるものである。深部地熱資源に関しては,韓国は火山性の高エンタルピー地熱資源を持たないものの,地下深部には莫大な量の地熱資源がある;例えばEGS 技術を用いれば6.5 km までの深度に19.6 GWeの地熱発電ポテンシャルがあると評価されている。EGS による地熱発電のための最初の概念実証プロジェクトは,ポハンで2010 年12 月に開始された。EGS による地熱発電が5 年間のうちに実現する予定である。国家地熱技術ロードマップ(TRM)は,2030 年までに200 MWe の設備容量導入を達成する目標を定めている。国家地熱TRM に基づいた研究開発プログラムは,全国的なGHP システムとEGS システムの普及に対しその技術的な側面を支援していく。政府による助成金制度が続けられる限り,少なくともこの先5 年間は,急速なGHP の導入が続くと予想される。

著者

リー テジョン ソン ユンホ

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.34, no.4, pp.207-213, 2012-10-25 (Released:2013-05-10)

参考文献数

8

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韓国での地熱利用は最近の10 年間に著しい成長をとげた。中でも地中熱ヒートポンプ(GHP)が際立っており,それは主として,さまざまな補助金制度,研究開発への支出,新エネルギー・再生可能エネルギー利用を公的機関に義務づける法令,電力料金定額制度等を含む,強力な政府支援によるものである。深部地熱資源に関しては,韓国は火山性の高エンタルピー地熱資源を持たないものの,地下深部には莫大な量の地熱資源がある;例えばEGS 技術を用いれば6.5 km までの深度に19.6 GWeの地熱発電ポテンシャルがあると評価されている。EGS による地熱発電のための最初の概念実証プロジェクトは,ポハンで2010 年12 月に開始された。EGS による地熱発電が5 年間のうちに実現する予定である。国家地熱技術ロードマップ(TRM)は,2030 年までに200 MWe の設備容量導入を達成する目標を定めている。国家地熱TRM に基づいた研究開発プログラムは,全国的なGHP システムとEGS システムの普及に対しその技術的な側面を支援していく。政府による助成金制度が続けられる限り,少なくともこの先5 年間は,急速なGHP の導入が続くと予想される。

著者

渡辺 秀文

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.22, no.Supplement, pp.S01, 2000 (Released:2009-08-07)

著者

野田 徹郎

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.9, no.2, pp.133-141, 1987-04-25 (Released:2009-08-07)

参考文献数

7

被引用文献数

1

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An anion index, AI, is proposed as an indicator to estimate the proximity to the center of geothermal activity. AI, defined as following, is calculated from major anion composition of a hot spring water.AI=0.5×(SO4/Cl+SO4+Cl+SO4/Cl+SO4+HCO3) (unit: equivalents) AI is unity at the steaming ground where geothermal activity is highest. It gradually decreases with increasing a distance from the center of activity, with the appearance of Cl type thermal water, and with mixing of HC03 type water. AI is recommended as a practical qualitative indicator presenting degree of closeness to the center of geothermal activity, but should not be applied to thermal water from deeper wells, to volcanic fumaroles emitting HCl, or to springs originated from sea water.

著者

大沢 信二 由佐 悠紀 大上 和敏

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.20, no.4, pp.289-292, 1998-10-25 (Released:2009-08-07)

参考文献数

8

著者

盛田 耕二 藤田 勉 杉本 静哉 山田 恭暉 向井 良一

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.14, no.1, pp.29-45, 1992-01-25 (Released:2010-02-05)

参考文献数

3

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The purpose of this study was to clarify the level of thermal output per DCHE at which power generation using a downhole coaxial heat exchanger (DCHE) becomes economical. Another goal was to clarify the geothermal resources favourable for this system. The following conclusions are drawn in this paper: (1) When heat is transferred only by conduction in the formation as in Hot Dry Rock, the power generation sytem appears to be uneconomical. On the other hand, in the case of Hot Wet Rock where the convective heat transfer mechanism is dominant, there appears to be a greater possibility of the realization of this system. (2) In the case in which the estimated net thermal output after one year of operation was 10.4 MWt/DCHE, the adjusted mean power generation cost for 15 years of plant operation under the current subsidy system was estimated to be 16.4 Yen/kWh. In this case, the power generation system might become economical in the near future. Hence, under conditions similar to those assumed in this study, 10 MWt/DCHE of the net thermal output is though to be a good criterion for judging whether the system is practical or not. In order to investigate the possibility of the realization of this system and to clarify the favourable characteristics of the formation in further detail, it is essential to accumulate in-situ data carrying out heat extraction experiments in high temperature and permeable formation.

著者

ロバト エンリケ リマ 日本地熱学会国際交流委員会

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.35, no.1, pp.41-44, 2013-01-25

参考文献数

4

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総合的な地熱コンサルタントの視点からは,市場規模のみならず市場安定性を維持し改善するためにも,実行可能な地熱開発戦略が必要である。そういった戦略は,先端技術に基づくアドバイスおよびその市場の状況についての詳細な知識を提供することによって,開発事業者や金融関係者の間に信頼感を生じさせ,管理可能なリスクのレベルで地熱資源を開発するように導くことを目指したものでなければならない。リスクは,開発に至るまでの過程でいくつかの形態で現れるものだが,リードタイムの無用な長期化を避けるために,必要なタイミングで適切に扱われるべきである。地熱エネルギーは国が所有する資源であるが,その開発が公共で行われるべきか民間で行われるべきかに関しては,常に公共と民間とのシナジーが必要である。我々の経験によれば,当事者間の相互理解を深めると共に,お互いの役割を認識すべく障壁を特定することを目的とした戦略により,地熱資源開発をスムーズに成功に導くことができ,その結果として強固で安定した市場環境がもたらされる。

著者

伊藤 芳朗 斎藤 輝夫 関岡 満 湯原 浩三

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.5, no.1, pp.39-54, 1983-02-20 (Released:2009-08-07)

参考文献数

15

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An observation of telluric current was carried out on 27 November 1978 in the Kurobe Sennindani hot dry rock, utilizing the Kurobe Jobu railway tunnel known as a hot tunnel penetrating through the hot dry rock. The results obtained are as follows: (1) Observed variations of telluric current do not show any characteristics of natural origins but of artificial electric noises or stray current originating probably from some electric power plants within 1.5 km distance and DC-electric cars operating at about 4 km away. (2) Variations with frequency of 4.4 Hz in earth current were found at a low temperature zone (about 15°C), but it disappeared at hot a rock zone (about 70°C). It may follow that earth current of 4.4 Hz-frequency is unable to penetrate into the hot rock zone due to skin effect. Taking 300 to 500 m for the depth of the hot rock zone below the ground, 2 Ω-m of low resistivity of the hot rock zone is obtained by Cag niard equation. The result was discussed, referring to rock characteristics of the high temperature zone. (3) Irregular variations of earth current were in opposite directions at the low and high temperature zones. (4) Long period currents by streaming potential were observed at the hot rock zone. It is estimated that streaming potential was induced by warm and humid wind forming from hot rock walls and fumaroles.

著者

金子 正彦

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.34, no.3, pp.123-137, 2012-07-25 (Released:2013-05-10)

参考文献数

30

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“Geothermal energy laws” that govern the procedures of geothermal resource development and stipulate the rights and duties of geothermal resource developers in major countries were surveyed. The survey was carried out by collecting relevant laws and papers through the Internet. Each county has its own “geothermal energy law”. These laws were compared from the view points such as the objective of the law, the ownership of the resources, the types of licenses, the licenser, the licensee, the setting of licensed area, etc. Geothermal energy laws in other countries may be great reference when Japan considers enhancing its own legal framework to promote geothermal energy development.

著者

野本 卓也 藤井 光 内田 洋平 利部 慎 嶋田 純

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.34, no.4, pp.185-197, 2012-10-25 (Released:2013-05-10)

参考文献数

25

被引用文献数

1

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Today, it is important to expand the use of untapped energies for tackling the climate change issues. The energy in the shallow ground is one of the most promising untapped energy sources. However, a geothermal heat pump (GHP) system is not well utilized in Japan, especially in the warm areas. In order to investigate the possibility to introduce the GHP systems in the warm areas of Japan, a comprehensive research was carried out choosing the Kumamoto Area, Kyushu, Japan, as the target area. In this study, a suitability map of GHP systems was developed applying a single ground heat exchanger model at several locations of the plain. The suitability map showed that the center of Kumamoto City, Suizenji, and Kikuyo Town were the good candidates of high performance of GHP systems. Moreover, the amount of CO2 reduction with the application of GHP systems was evaluated on the basis of the performance of the system predicted by the numerical model. From this result, the effect of about 80,000-ton CO2 reduction in a year was shown by introduction of GHP systems in Kumamoto area.

著者

及川 寧己 当舎 利行

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.23, no.4, pp.275-282, 2001-10-25 (Released:2009-08-07)

参考文献数

12

被引用文献数

1

著者

二子石 正雄

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.21, no.3, pp.225-235, 1999-07-25 (Released:2009-08-07)

参考文献数

5

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The area in which the Uenotai geothermal power station is located was surveyed originally by owa Mining Co., Ltd. (DOWA) in 1971. Akita Geothermal Energy Co., Ltd. (AGECO), an affiliate company of DOWA, was established in 1981, and all of the technical information and data on the Uenotai field were transferred to AGECO. In this report, I cover the following three categories;1. A summary of the 23 years of investigation and development in the Uenotai area.2. The operation conditions during the four and half years since this power station commenced its operations.3. The problems to be settled in the future.

著者

浅井 明久

出版者

THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.21, no.3, pp.257-265, 1999-07-25 (Released:2009-08-07)

参考文献数

4

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Kyushu Electric Power Co., Inc. operates six units at five geothermal power stations. Their total capacity is 207.5 MW, accounting for 39% of the installed geothermal power plants in Japan. Hatchoubaru Power Station started operation about 21 years ago with the first unit. Now stable operation on the output of 110 MW (55 MW×2) goes on. On the way to stable operation, we confronted output decline due to reservoir interference by reinjected hot water. In order to recover the output, both steam producing system and power generating system were checked up as a consequent system. The idea is based on our company's fundamental strategy for geothermal development: “consistent development” from upstream to downstream. We carried out optimum reservoir management with more accurate reservoir monitoring data. Also we improved the generation facilities such as turbine and two-phase flow line (NISOURYUUTAIRENRAKUKAN), to utilize existing wells. As a result, these efforts recovered the output successfully and reduced generation costs. We learned that reservoir management is essential to keep stable output of the Hatchoubaru Power Station. We shall make continuous efforts to keep economically stable output by advanced reservoir management, applying the newest simulation technology to balance reinjection with production.