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Ground heat extraction with a heat pump by circulating a glycol solution in a vertical ground pipe.

[In Japanese. / En japonais.]

Author(s) : OCHIFUJI K., NISHIOKA J., NAGANO K., NAKAMURA M.

Type of article: Article

Summary

Experiments were conducted on long-term ground heat extraction and storage using a vertical concentric steel pipe of 20 meters long and 60 mm in diameter. Seasonal changes in the amount of heat stored and extracted, and the soil temperature were measured using a glycol solution kept at a specific temperature of either 0 or 30 deg C. Results indicate that thermal storage in summer increased the heat extraction rate by 25 to about 30%.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1994-1197
  • Languages: Japanese
  • Source: Transaction of the Society of Heating, Air-conditioning and Sanitary Engineers of Japan - n. 51
  • Publication date: 1993/02
  • Document available for consultation in the library of the IIR headquarters only.

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