Abstract
A practical system for using terrestrial heat in shallow ground has been proposed by the authors' research group to control pavement temperature. This system comprises a water tank and a pavement incorporating a heat exchanger pipe system that was built on the campus of Fukui University.A field experiment has been ongoing since July 1995. Water and ground temperatures have been measured continuously in and around the tank along with the heat carrier fluid flow rates.The heat energy budget of the tank, obtained from the field experiments, confirmed our past result that terrestrial heat across the tank walls is effective in not only melting snow on roads in winter but also suppressing the rise in pavement temperatures in summer.The proposed numerical model was able to reproduce the behavior of the water temperature in the tank including the effects of the inflow of cold water and the return flow to the pavement heat exchanger in winter.
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