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, gas engine cogeneration system and heat pump system are 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 simulation result indicated that heat pump system is effective in reduction of energy consumption compared with gas engine cogeneration system
