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STUDY OF SEASONAL GROUND HEAT STORAGE OF SOLAR ENERGY USING A VERTICAL PIPE SYSTEM.

[In Japanese. / En japonais.]

Author(s) : OCHIFUJI K., SUZUKI M., NAKAMURA M.

Type of article: Article

Summary

PART 1: INTRODUCTION, SOIL TEMPERATURE OF SAPPORO, PIPE TEMPERATURE. TWO HEAT RECOVERY SYSTEMS ARE PROPOSED: NATURAL AND MECHANICAL. IN THE FORMER SYSTEM, A SET OF PIPES IN THE SOIL AND A HOUSE BUILT ON TOP OF THEM ARE USED TOGETHER TO FORM THE INDOOR TEMPERATURE. IN THE LATTER SYSTEM, THE HEAT RETAINED IN THE SOIL IS RECOVERED BY USING A HEAT PUMP. PART 2: EXPERIMENT AND SIMULATION OF A SINGLE VERTICAL PIPE. HOT WATER FROM A SOLAR COLLECTOR WAS INJECTED FOR 2 MONTHS TO STORE HEAT IN THE GROUND AND WATER AT ABOUT 286 K (13 DEG C) WAS INJECTED TO RECOVER THE STORED HEAT. UNLESS INSULATION WAS USED ON THE GROUND OVER AND AROUND THE PIPE, THE MAJORITY OF THE HEAT STORED FOR A LONG TIME ESCAPED. AT 286 K, THE HEAT RECOVERY RATE, THE RATIO OF RECOVERED TO INJECTED HEAT, WAS ONLY 3.2%. THE EFFECT UPON THE HEAT RECOVERY RATE WHEN THERMAL INSULATION MATERIALS WERE USED TO PREVENT HEAT DISSIPATION WAS CLARIFIED NUMERICALLY. THE MAXIMUM HEAT D.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1985-2649
  • Languages: Japanese
  • Source: Transaction of the Society of Heating, Air-conditioning and Sanitary Engineers of Japan - n. 27
  • Publication date: 1985
  • Document available for consultation in the library of the IIR headquarters only.

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