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Estimation of reclaimable thermal energy in winter and inside space temperature in summer of the Sapporo subway system.

[In Japanese. / En japonais.]

Author(s) : YOSHIDA H., ITAMI K., TERAI T., OKUMURA J., KUBOTA K., KISHI M.

Type of article: Article

Summary

About 25 to 35% of thermal energy, that is discarded to the atmosphere in usual subway systems, can be reclaimed by an air-source heat pump. The amount of thermal energy can be increased 10% more by reversing the direction of ventilation air flow in tunnels. The capacity of the heat pump should be about 60% of the maximum reclaimable thermal energy per hour. By the equipment 90% of waste energy can be reclaimed throughout a winter, that is, in total 290-330 megawatts-hour of thermal energy from a standard subway block, which means a station and tunnels in both sides.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1997-2443
  • Languages: Japanese
  • Source: Transaction of the Society of Heating, Air-conditioning and Sanitary Engineers of Japan - n. 61
  • Publication date: 1996/04
  • Document available for consultation in the library of the IIR headquarters only.

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