Abstract
In recent years, various heat supply systems for private houses have been developed for the purpose of reduction of energy consumption and greenhouse gas emission. Among them, heat supply system using heat pump is most typical and in practical use. It is quite important to evaluate the thermal efficiencies of these heat supply systems. The simulation models have been developed for these systems and the evaluation of thermal efficiencies was carried out for the typical thermal and electricity consumption patterns in private houses. The effects of various parameters of the seytem on thermal efficiencies are analysed. The simulation result indicated that heat pump system is effective in reduction of energy consumption compared with gas engine cogeneration system
