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THEORETICAL ANALYSIS OF HEAT CONDUCTION OF LONG TERM HEAT STORAGE AND EXTRACTION BY BURIED VERTICAL PIPE SYSTEMS.

[In Japanese. / En japonais.]

Author(s) : OCHIFUJI K., KIM N. C.

Type of article: Article

Summary

THE STUDY WAS UNDERTAKEN FOR A BETTER UNDERSTANDING OF VERTICAL PIPE SYSTEMS WHICH USE THE GROUND ITSELF AS STORAGE MATERIAL. A THEORETICAL ANALYSIS EMPLOYING THE LAPLACE TRANSFORM HAS BEEN DEVELOPED. TWO BOUNDARY CONDITIONS OF TEMPERATURE AND HEAT FLUX ARE GIVEN. IN THE ANALYSIS, FLOW RATE INSIDE THE PIPE, CONVECTION HEAT TRANSFER COEFFICIENT BY FLOW, AND OVERALL HEAT TRANSFER COEFFICIENT ON THE PIPE ARE CONSIDERED. THE EFFECTS OF THE ABOVE MENTIONED PARAMETERS FOR THE THERMAL CHARACTERISTICS ARE DISCUSSED. THESE PARAMETERS SIGNIFICANTLY AFFECT: A) THE NET HEAT RATE OF FLUID, WHEN BOUNDARY CONDITION OF TEMPERATURE IS GIVEN ; B) THE INLET TEMPERATURE OF FLUID, WHEN BOUNDARY CONDITION OF HEAT FLUX IS GIVEN. BOTH IN THE CASE OF LAMINAR FLOW AND HIGH THERMAL RESISTANCE PIPE SUCH AS PLASTICS, IT IS NECESSARY TO CONSIDER THE PARAMETERS OF FLOW RATE AND THERMAL RESISTANCE. IN THE CASE OF STEEL PIPE WITH TURBULENT FLOW, THE HEAT RSLAW'S MODEL FOR BOUNDARY CONDITION OF TEMPERATURE.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1989-0313
  • Languages: Japanese
  • Source: Transaction of the Society of Heating, Air-conditioning and Sanitary Engineers of Japan - n. 36
  • Publication date: 1988
  • Document available for consultation in the library of the IIR headquarters only.

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