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

大久保 泰邦 秋田 藤夫 田中 明子

出版者

日本地熱学会

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.20, no.1, pp.15-29, 1998-01-25

参考文献数

25

被引用文献数

8

著者

安川 香澄 内田 利弘 小関 武宏 最首 花恵 福田 大輔 松田 鉱二 柳澤 教雄 藤光 康宏 椋平 祐輔 糸井 龍一 岡部 高志 鈴木 杏奈 海江田 秀志 花野 峰行 石戸 経士 石橋 琢也 佐藤 真丈 山田 茂登

出版者

日本地熱学会

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.37, no.4, pp.153-176, 2015-10-25 (Released:2016-04-25)

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.

著者

最首 花恵 小坂 拓也 土屋 範芳 渡邉 則昭

出版者

日本地熱学会

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.39, no.1, pp.15-24, 2017-01-25 (Released:2017-07-25)

参考文献数

19

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Hydrogen produced by the water-splitting reaction is one of the alternate sources derived from fossil fuels. However, the present systems for the hydrogen production still require the extra energy or processes such as heating, milling and adding the chemical agent. The hot springs in Japan are naturally in high temperature and in wide range of pH. We investigated the combination of hot spring water and waste aluminum that are appropriate for hydrogen production without extra energy. Here, we used waste aluminum for reducer of water-splitting reactor. The hydrogen production system in Onsen (hot spring) area has a potential to promote not only the environmental and energy problems but also the activation of the local community as the system of “local production for local consumption”. In this study, the effects of the characters of hot springs and the conditions of the hydrogen generator system were revealed by the laboratory experiments. The water-splitting reaction was enhanced by using the hot spring water of (1) lower pH (< 2), (2) higher temperature, and (3) higher ratio of HCl/H2SO4. The concentration of cations in the fluid is not related to the reaction rate of hydrogen production. The prototype of the hydrogen generator for the water splitting reaction by using the acidic hot spring water and waste aluminum was developed and used in two type systems: batch and flow-through. The laboratory experiment by using the original generator revealed that hydrogen production was more efficient in the flow-through system because of constant pH value of fluid.

著者

安川 香澄 花野 峰行 相馬 宣和 窪田 ひろみ 最首 花恵 長縄 成実 椋平 祐輔 浅沼 宏 石橋 琢也 海江田 秀志 松田 鉱二 谷口 聡子 藤井 光 小助川 洋幸 桂木 聖彦 内田 洋平

出版者

日本地熱学会

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.37, no.3, pp.101-117, 2015-07-25 (Released:2016-01-25)

著者

太田 一也

出版者

日本地熱学会

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.28, no.4, pp.337-346, 2006-10-25 (Released:2009-08-07)

参考文献数

28

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Many hot springs are gushing from the inside of the Unzen Graben which traverses the central part of Unzen Volcano in east-west direction. Their geochemical characteristics are of salt type at the western foot, of sulfur type at the central mountain area and of bicarbonate type at the eastern foot of the volcano. They are hot in the west and warm in the east. A hydrothermal system at Unzen Volcano was presented by Ohta (1972) that the original magmatic emanations are supplying from a magma reservoir which lies beneath the Tachibana Bay assuming Chijiwa Caldera located at western side of volcano, and also that magmatic emanations have been ascending obliquely toward the east generating each type of thermal waters corresponding to the degree of differentiation. But this hydrothermal system was not accepted widely. Unzen Volcano began to erupt in November 1990 after 198 years dormancy. The forgoing earthquake swarm occurred beneath the Tachibana Bay in November 1989, and the foci migrated toward the summit of the volcano repeatedly for One year. They are arranged in semicircle at the southern part of Tachibana Bay and in a parallel two lines which run from the bay to the summit as if indicating the caldera rim and the conduit, respectively. Deformation of ground during the eruptions also showed that pressure sources were underlain beneath the inside of the parallel foci lines, and final pressure source was detected beneath the Tachibana Bay (Matsushima et al., 2003, 2005). So, the hydorothermal system presented by Ohta (1972) may be proved to be true because of these new facts. Based on these, modified supplying model of magmatic emanations were proposed here.

著者

Zaher Mohamed Abdel 江原 幸雄

出版者

日本地熱学会

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.31, no.3, pp.155-166, 2009-07

著者

Sofyan Yayan 江原 幸雄 Daud Yunus

出版者

日本地熱学会

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.31, no.3, pp.167-176, 2009-07