Study on Thermal Performance of Urban Residential buildings in the Zhejiang Region

The aim of the present study is to clarify the energy saving potential for urban residential buildings. In this paper the impact of energy efficiency of Zhejiang urban residential buildings in china is discussed based on simulation analyses. The results show that the air change rate and the U-value (The Heat Transfer Coefficient) of external wall of building have the greater influence on the annual energy saving rate than other factors. The energy saving rate increases clearly with a decrease in the air change rate, and the effective thickness of external wall insulation is between 80 [mm] and 100 [mm] utilizing expanded polystyrene insulation board for the base residential building model.