Abstract
Ground source heat exchangers are a growing technology in the area of building air conditioning, and it is therefore important to evaluate soil thermophysical properties at the installation location. We have undertaken such an evaluation at the College of Engineering, Nihon University (Koriyama, Fukushima) using a Thermal Response Test (TRT). The effective thermal conductivity of soil and the thermal resistance of the ground heat exchanger were approximately 2.0 W/(m・K) and 0.086 (m・K)/W respectively. The main component of the soil is sand gravel, and the measured effective thermal conductivity was found to be in agreement with literature values.
