Proposal for using underground mine and geothermal resources for sustainable communities

Y. Koizumi, Masami Nakagawa

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

It has become more important for communities to utilize locally available renewable energy sources. The use of renewable energy can reduce environmental impacts and potentially provide long-term cost savings for communities. In this paper, the authors propose a system that could cool buildings in summer and melt snow on the pedestrian sidewalks in winter using an abandoned underground mine and a hot spring in Idaho Springs, Colorado. In the proposed system, an underground mine would be used as cold thermal energy storage, and the heat of geothermal hot fluid transported from the hot spring would be re-used to melt snow in the historic downtown. To assess the feasibility of the proposed system, we conducted a series of temperature measurements at the Edgar Mine (Colorado School of Mines' Experimental Mine) and heat transfer analyses of the geothermal hot fluid flowing through pipes that will be buried in the ground under the city. The temperature measurements proved that the temperature of the underground mine was low so that we could store cold groundwater for use in summer. Furthermore, the temperature profiles of two different tunnels in the Edgar Mine were discussed to determine the most appropriate place to store cold groundwater for summer use. In the heat transfer analyses, the heat loss of the geothermal hot fluid during its transportation was calculated, and then the heat requirement for snow melting and heat supply from the geothermal hot fluid were compared. It was concluded that the heat supply in the present situation was not sufficient enough to melt snow in the whole area of the historic downtown. However, the result indicated that the proposed snow melting system could be realizable if the snow melting area is limited or additional geothermal wells are drilled. We hope this case study will serve as an example of the concept of "local consumption of locally available energy". Many communities in the world do not fully utilize thermal resources in the ground. If such communities start utilizing them in a socially and environmentally responsible manner, it will contribute more to globally sustainable development for mankind.

本文言語英語
ホスト出版物のタイトルISRM International Symposium - 8th Asian Rock Mechanics Symposium, ARMS 2014
出版社International Society for Rock Mechanics
ページ2616-2625
ページ数10
ISBN(電子版)9784907430030
出版ステータス出版済み - 1月 1 2014
外部発表はい
イベント8th Asian Rock Mechanics Symposium, ARMS 2014 - Sapporo, 日本
継続期間: 10月 14 201410月 16 2014

その他

その他8th Asian Rock Mechanics Symposium, ARMS 2014
国/地域日本
CitySapporo
Period10/14/1410/16/14

!!!All Science Journal Classification (ASJC) codes

  • 地球物理学
  • 地球化学および岩石学

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