Passive Energy-saving Design Strategy Of High-rise Residential Buildings In Hot Summer And Cold Winter Area

With the increasingly serious energy problems in the world,energy conservation and emission reduction has become a major concern of all countries.According to the data,China's building energy consumption accounts for one third of the national energy consumption,and the potential of building energy conservation is huge.China's urbanization is in a period of high-speed development,a large number of people flow into the city,accelerating the construction of high-rise residential buildings,new high-rise residential buildings accounted for more than 40% of new buildings,in today's energy shortage,high-rise residential energy-saving design is particularly important.Although the existing research results and relevant energy-saving standards are helpful to the residential energy-saving design,there are still many disadvantages in the applicability of high-rise residential energy-saving.Starting from the passive design factors that affect building energy efficiency,this paper selects Wuhan,a typical city in hot summer and cold winter climate zone,analyzes its high-rise residential buildings,discusses the impact of different passive factors on building energy consumption,and then provides feasible ideas and references for passive energy-saving design of high-rise residential buildings.First of all,investigated and analyzed the existing typical high-rise residential buildings in Wuhan,and then summarized and analyzed the plane layout of high-rise residential buildings in Wuhan.The research object is determined to be two plane types of high-rise residential buildings,plate type and tower type,discussed and analyzed the impact of the plane form not used on energy conservation.Secondly,according to the climate characteristics of the hot summer and cold winter climate zone in Wuhan area,the impact of climate characteristics on building energy saving is analyzed.Based on this study,the main passive parameters affecting passive energy saving of high-rise residential buildings in Wuhan area are determined as the heat transfer coefficient of the external wall,the ratio of windows to walls and the building direction.The energy saving potential and the mutual influence relationship of each passive design parameter are discussed.Then it is the main part of the paper.Aiming at the three passive design parameters of the external wall heat transfer coefficient,the window wall ratio and thebuilding orientation,through the building energy consumption simulation and analysis software,the paper calculates the building energy consumption of each passive design parameter in the range of its change threshold,studies the impact of each passive design parameter on the energy saving rate,and constructs the relationship between energy consumption and each passive design parameter This paper analyzes the different influence of the same passive design parameter between the slab high-rise building and the tower high-rise building.Based on the influence of three passive design parameters on building energy consumption,which are the heat transfer coefficient of external wall,the ratio of windows to walls and the orientation of building,the relationship among the three passive design parameters is studied by orthogonal test,and the maximum passive design factors affecting the energy consumption of high-rise residential buildings in Wuhan area are determined.Finally,according to the two passive design variables,the heat transfer coefficient of the external wall and the ratio of the window to the wall,the multi-objective optimization analysis is adopted to analyze the passive energy-saving design strategy.