Analysis on present situation and energy saving potential of heating energy consumption of residential buildings in Chinese northern cities

Taking the residential buildings in Tianjin as research objects, based on the actual heating energy consumption data, investigates the present situation of heating energy consumption in actual operation and analyses the related reasons resulting in high heating energy consumption. The result shows that heating energy consumption can be saved by 22% if reasonable indoor temperature control measures are adopted. Compares Chinese and German residential building energy saving standards in two aspects, namely design heat demand and actual heating energy consumption, and finds that there are 17% and 35% of energy saving potential from building envelope compared Chinese third-step energy efficiency standard with German EnEv 2002 and EnEv 2009, respectively. The actual operation heating energy consumption of the residential building satisfied Chinese third-step energy efficiency standard is 73.2% higher than the one satisfied German EnEv 2002.