半地下試験家屋の敷地内における土壌の熱的禅院に関する実測

概要

論文の詳細を見る
Since several years ago, we had conducted measurements of thermal performance for a semi-underground room as well as computersimulations. It is very important for comparing measurement results with computational results to make detail thermal model of the soil around the test house. To obtain fundamental information for the modelling, the following measurements and analysis for the soil thermal properties were done: 1) Measurement of the properties for soil test pieces sampled from the site, 2) Long-term on-site measurement of thermal conductivity and voluminal heat capacity, 3) Long-term measurement of soil temperatures and their spectral analysis by techniques of a maximum entropy method, 4) Estimation of average thermal diffusivity from the data obtained by the spectral analysis. As the result, the average diffusivity was estimated as 039×10^<-6>m^2 but it was also found that the actual diffusivity depended on time and distributed along depth from ground surface. Additionally, a simple calculation model for soil temperature having constant thermal diffusivity was compared with the temperature measurement and the prediction error was illustrated.
1994-08-30