Research On Thermal Performance And Energy Consumption Of Daylighting Roof For Office Buildings In Zhengzhou

In order to solve the problem of indoor natural lighting in large and deep architectural space,daylighting roof produces new connotation of function and artistic expression with the development of the times.However,due to its weak thermal performance,the current situation of building cold in winter and hot in summer and prominent energy consumption is increasingly serious,which cannot be ignored.As one of the transparent building envelope,the optimization of thermal performance of daylighting roof has a positive effect on building energy consumption.Supported by the project of "national key research and development plan of the13 th five-year plan",this paper studies the thermal performance and building energy consumption of daylighting roof,combining with the specific scope of zhengzhou area and taking office buildings and atrium space as the carrier,and optimizes the thermal performance of daylighting roof from the technical perspective to reduce building energy consumption.Firstly,through literature study,the framework of the theoretical system of daylighting knowledge was established.Then,by means of survey samples and human body perception,the current situation of indoor thermal environment in daylighting roof was found and summarized,and some phenomena such as vertical temperature stratification in summer,hot roof and insufficient humidity in winter existed in daylighting roof engineering projects.In view of the current situation,this paper analyzes the factors affecting the thermal performance and building energy consumption from the aspects of daylighting roof form,materials,shading and ventilation.In addition,the computer simulation method was used to set up experiments on typical influencing factors,optimize the thermal performance of daylighting roof and the current situation of building energy consumption,and it was concluded that the three-glass two-cavity Low-E insulating glass + adjustable external shading + natural ventilation was the most optimal type from the technical perspective based on the simulation analysis.Finally,the optimized daylighting roof is combined with the engineering project for design practice and simulation verification to build a practical engineering project with beautiful and practical appearance,moderate cost and excellent comprehensive efficiency,which plays a role in the design practice of envelope structure system.