Development of an Optimized Ground Coupled Heat Pump System in Fukuoka City, Southwestern Japan

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  • FUKUOKA Koichiro
    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University (currently West Japan Engineering Consultants Inc.)
  • EHARA Sachio
    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University
  • KURODA Takashi
    Graduate School of Engineering, Kyushu University(currently SNK Co., Ltd.)
  • SAKEMI kotaro
    Graduate School of Engineering, Kyushu University(currently Mitsubishi Heavy Industry Co., Ltd.)
  • TAKESHITA Hiroto
    Graduate School of Engineering, Kyushu University (currently West Japan Engineering Consultants Inc.)
  • MORITA Koji
    Institute of Advanced Industrial Science and Technology

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Other Title
  • 福岡市における地中熱利用冷暖房システムの開発事例
  • フクオカシ ニ オケル チチュウ ネツ リヨウ レイダンボウ システム ノ カイハツ ジレイ

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Abstract

Authors developed a new Ground Coupled Heat Pump (GCHP) system in Fukuoka city, southwestern Japan. The system was installed in the brick-made experiment house and it had experienced two years operation. The system was designed through the use of the geophysical prospecting method and the numerical heat transfer simulation. Its performance had been observed during the operation, and its high efficiency was confirmed. The system achieved a system COP (coefficient of performance) at a value of 5.0 throughout the cooling operation in 2007. The assessment on subsurface thermal environment caused by the newly developed system was also conducted. The result showed that the system affects the subsurface temperature field quite slightly during twenty years operation

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