B-67 Assessment of a Ground Source Heat Pump System in Soen Campus of Sapporo City University : Part-1 Outline of the ground source heat pump system and assessment of operation during cooling period

Abstract

A ground source heat pump (GSHP) system has been installed into a new building in the Soen campus of Sapporo City University. The ground thermal energy is extracted through the ground heat exchanger, steel foundation piles and boreholes and utilized in the ventilation system for heating and cooling of fresh air. The extracted heat is increased through the heat pump in the heating period. On the other hand, the cold energy from the ground is directly utilized for free cooling without the heat pump in the first year's operation in 2006. This paper describes the system flow and the result of the free cooling operation during summer. It is predicted that changes of operating conditions of the circulating pumps will lead to increase the system COP to around 3.0.