Energy Consumption and Running Cost Evaluation of Building Individual Air-Conditioning System

In this paper. a simulation model for energy and cost calculations of building individual air-conditioning system is constructed for the purpose of developing energy diagnostic tools for energy saving, and the model is applied to case studies on comparison between EHP(Electric Heat Pump system) and GHP(Gas Heat Pump system) energy/cost performances in an engineering research and education building in a new campus of Kyushu University, which is under planning and constructing as the first stage. As the results. it is verified that EHP is superior to GHP on energy saving because the secondary energy consumption rate of EHP is about twenty five percent of GHP and the primary energy consumption rate of EHP is about fifty seven percent of GHP. On the other hand. the annual running cost of EHP is about ten percent higher than one of GHP