Research On Building Energy Audit Based On Building Energy Gene Theory

Building energy consumption is an important part of the total energy consumption in the world, which accounts for 42% to 45% in industrialized countries, and 27% in China. Therefore, with the high density of energy consumption and rapidly developed speed, the public buildings lead the augment of power consumption rapidly. So there is no time to delay of public building energy consumption. In conclusions, it is very important to realize the actuality of energy consumption and analyze the characters of public building energy consumption. At last, we should find means and ways to cut energy consumption.According to the actual investigation, this paper summarized the status quo and development trend of energy consumption about Chongqing's public buildings, focusing on analysis of the energy consumption and management situation of the department store buildings, and collects the necessary data for the audit of the department store buildings.This paper uses DeST software to analyze the department store building's cooling load characteristics detailedly, including the hourly load characteristics, the partial load characteristics and the load composition characteristics; by the method of orthogonal experiment ,this paper uses DOE-2,CTM softwares to analyze the primary and secondary of various factors,which can influence the cooling load of the department store buildings,points out that the air-conditioning setting temperature,air change rate and strength of internal heat source are the main factors of influence the cooling load; And the shading coefficient is more significantly than other architectural essential factors.This paper uses DeST,DOE-2 and CTM to carry through the energy audit to the department store buildings detailedly, including energy consumption research audit and energy consumption simulated audit. Through the energy consumption research audit, the author analyzes the department store building's situation and level of energy consumption. Also analyzes the main reasons of difference between energy consumption's simulation result and actual result. On this basis, the author have fitted every software's corresponding air-conditioning period cooling consumption index's calculation formulas by using multiple linear regression's math method,and according to every fitting formulas, quantificationally analyzes indoor air-conditioning setting temperature,air change rate and strength of internal heat source's effect to the cooling comsumption index of department store buildings.This research provides necessary theoretical basis for energy audit and energy saving retrofit of the department store buildings.