812 ガイアエネルギーシステムに関する研究

概要

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The temperature of earth is almost constant (about 16 degree) at 100m below the ground surface through a year and the thermal conductivity of the earth soil is small. These facts show that the earth is suitable as a heat sink and/or heat source. In summertime, the heat absorbed by an air conditioner is transmitted into the earth soil and the heat ia stored until winter. In wintertime the heat is used for heating a building through the heat exchanging system. We call such a system Gaia (goddess of the earth) Energy System. In this paper the authors studied the behavior of the Gaia Energy System by computating the amount of heat transmission. A shortage of this system is poor heat emission into soil. It is because of low thermal conductivity of soil. To overcome this shortage, the authors examined the effect of fins fitted on a heat exchanger pipe, experimentally as well as numerically.
社団法人日本機械学会の論文
2003-03-13