Statistical analysis of residential building energy consumption in Tianjin

To analyze the effect of energy conservation policies on energy consumption of residential buildings, the characteristics of energy consumption and indoor thermal comfort were investigated in detail in Tianjin, China, based on official statistical yearbook and field survey data. A comprehensive survey of 305 households indicates that the mean electricity consumption per household is 3215?kWh/a, in which annual cooling electricity consumption is 344?kWh/a, and the mean natural gas consumption for cooking is 103.2?m³/a. Analysis of 3966 households data shows that space heating average intensity of residential buildings designed before 1996 is 133.7?kWh/(m²·a), that of buildings designed between 1996 and 2004 is 117.2?kWh/(m²·a), and that of buildings designed after 2004 is 105.0?kWh/(m²·a). Apparently, enhancing the performance of envelops is effective in reducing space heating intensity. Furthermore, the results of questionnaires show that 18% of the residents feel slightly warm and hot respectively, while 3% feel slightly cold in winter. Therefore, the electricity consumption in summer will rise for meeting indoor thermal comfort.