Operating Experience with Ground-Source Heat Pump Systems

We have been working on the research and development of the ground-source heat pump which is designed to provide a constant heating capacity, even in the coldest climates. In this R & D, we evaluated the thermal properties of the ground and the characteristics of the ground-source heat pump system. From the results of the operating test, we could confirm its viability for cold districts. Furthermore, by means of the development of an effective boring machine, for ground of N-values < 30 we have achieved a big reduction in the installation costs of the system compared with ordinary boring method.