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Improvement of thermal performance of air-source heat pumps for road heating using stored heat in subway structures.

[In Japanese. / En japonais.]

Author(s) : NAKAHARA T., YAMANAKA T., KOJIMA S., TAKEUCHI S., TANIGUCHI H., KUDO K.

Type of article: Article

Summary

The paper evaluates the quantity of heat recovered from underground structures during the subway service out time. From the measured temperature data, the following items are clarified: 1) thermal energy stored in the structures of subway in summer and that radiated in winter; 2) temperature conductivity; 3) heat pump inlet air-temperature rise (this temperature rise gives a COP increase of 0.14 and a power output increase of 7%.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1994-0522
  • Languages: Japanese
  • Source: SHASE - n. 52
  • Publication date: 1993/06
  • Document available for consultation in the library of the IIR headquarters only.

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