MECHANISM OF STORED COLD WATER IN UNDERGROUND SPACE BENEATH THE OYA AREA, UTSUNOMIYA CITY

DOI Web Site 10 References
  • TOMIGASHI Akira
    国立研究開発法人産業技術総合研究所 再生可能エネルギー研究センター
  • SHMOYAMA Shun
    八千代エンジニヤリング株式会社 事業開発本部第一開発室
  • FUJIWARA Morimitsu
    川崎地質株式会社 宇都宮事務所
  • SATO Daichi
    宇都宮市 経済部都市魅力創造課
  • SATO Rei
    八千代エンジニヤリング株式会社 事業開発本部第一開発室
  • UCHIDA Youhei
    国立研究開発法人産業技術総合研究所 再生可能エネルギー研究センター

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Other Title
  • 宇都宮市大谷地域における地下空間貯留水の低温化メカニズム

Abstract

<p> There is cold water stored in the underground space of the Oya area (the site of the Oya stone quarry) in Utsunomiya City. In this study, monitoring and model experiments were carried out in order to clarify the distribution and the mechanism on how the water was stored in the space underground. As a result of the investigation, the stored water partially filled the underground space and was in low temperature (under 10 deg.C), but many of these underground spaces were completely submerged (83% of the whole). The mechanism of the water being cold is considered to be a combination of a sensible heat process in which air from outside is being cooled in the winter in which flows into the underground space and becomes a cooling source and latent heat process in which water temperature lowers by evaporation of the stored water. From the result of the model experiments it showed that if the humidity of the air flowing into the underground space is low, then the temperature of the water decreases (correlation coefficient : R = 0.69 - 0.75).</p>

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