Energy from a two-pipe, earth-to-air heat exchanger

M Bojić, G Papadakis and S Kyritsis

Energy, 1999, vol. 24, issue 6, 519-523

Abstract: Solar energy accumulated in the soil may be utilized with an air-to-earth heat exchanger (ATEHE) which has two pipes buried in the soil, one made of PVC and one of steel. During the winter, air is heated; during the summer, it is cooled and then used in an air-conditioning device. To obtain the mathematical model of the ATEHE, we divided the soil and pipes into elementary volumes, used steady-state energy equations, and applied a time-marching method. We determined how the season, soil thermal conductivity and pipe spacing influence energy transfer from the soil to the ATEHE and also the steel-pipe contribution to this energy transfer.

Date: 1999
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Citations: View citations in EconPapers (11)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:24:y:1999:i:6:p:519-523

DOI: 10.1016/S0360-5442(99)00012-2

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