Model Study And Energy Consumption Analysis Of "Passive House" In Cold Area

Buildings are the natural remedy to climate, and the research on building energy system which can collect,store and transport solar energy by integrated the building has become the main development direction. This study discussed the Chinese passive house in cold regions, and it also analyzed the indoor thermal environment and energy consumption. Finally, there are six chapters to discuss the details, which key points as follows:Chapter1 describes passive house proposed by the European and other developed countries, and reviews the energy analysis method of passive house and the current situation of thermal performance research.Passive house originates from the European countries. The technical measures are mainly aimed at climatic features and geographical features of these regions, and China's national conditions determine that these passive techniques used in Europe, such as thick thermal insulation system of building envelope, are difficult to be promoted in large area. The main direction of passive house's development is its diversification.According to China's national conditions, chapter 2 explores one mode of passive house in cold regions in North China at the present stage, and the main characteristic is shown as the following: 1) 80～120mm thick insulation envelope; 2) double hollow glass windows; 3) installing WSAC on the south wall collecting solar energy; 4) reserving energy by using of indoor thermal mass constructed by concrete structure. The results of technical and economic analysis show that effects of energy-saving and emission reduction of WSAC residential are remarkable, and the energy efficiency rate is 58%, and the savings caused by coal during building lifetime is up to 130,000 yuan or 60 yuan/m~2.In chapter 3, aiming at deficiency of the integration between architecture design process and energy-saving technology in China at present, chapter 3 advances building integrated design strategy that the use of solar and other renewable energy should be full considered at the stage of architecture design, and explores architecture design processes and building types suited for WSAC residential.In chapter 4, heat transfer calculation model is built suited for WSAC residential, and a simulation program is compiled with the help of Matlab, and the accuracy of the model is verified by the experimental data.In chapter 5, the impact of heat charge and discharge characteristics of thermal mass on room temperature fluctuations and energy consumption is analyzed by this model, obtained adequate design guidelines of thermal mass. Besides that, the regulation of floor to indoor thermal environment is discussed. The result of floor peak time lag is 2 hours, and the decay factor is 0.84. In addition, according to the results of theoretical computation, the prediction formula of indoor max temperature of WSAC residential in Dalian is advanced.Chapter 6 analyzed the annual energy consumptions of WSAC residential with different thermal parameters of its enclose in different climate conditions. With the good thermal insulation performance and high air tightness, collector mode will do a greater contribution to reducing energy consumption.We find the annual energy consumption of the WSAC residential have decreased more or less,thereby,in some degree,it has engineering universal.