地中熱リファレンスマップの開発

(土壌の熱物性の測定)

抄録

This paper describes measurement of soil thermophysical property of the Reference Map for designing GSHP System. We measured thermal properties of 57 boring core samples in wet condition. They were collected in Okinawa, Fukushima and Kochi. 61% of all samples fell within the range of heat capacity 1.9 to 2.7 MJ/(m³K) and thermal conductivity 1.7 to 3.2 W/(mK). In the sample of the same classification, the heat capacity difference was 0.9 to 1.4 MJ/(m³K) and the thermal conductivity difference was 0.7 to 1.5 W/(mK). It is necessary to put numerical values in the map that consideration of safety factor by increasing the number of samples.