Experiment And Simulation Of Sedum Lineare Green Roof In Guangzhou Area

In recent years,the application of extensive green roof is more and more widespread.Especially in the hot summer and warm winter area,based on the high temperature and high humidity climate environment,the extensive green roof is very suitable for use in the hot summer and warm winter area.However,in the hot summer and warm winter area,there is no experimental and simulation research for extensive green roofs,especially the lack of thermal parameters for extensive green roof substrates.Based on this,this paper studies the following aspects of the extensive green roof and its substrates experiment and simulation:First of all,by establishing comparative laboratory room and long-term experimental observation,the author studied and analyzed the energy saving performance of extensive green roof in Guangzhou area in summer and transitional season,and the thermal insulation performance in winter.In this process,through long-term observation and measurement of thermal parameters of substrate,the author initially understand the dynamic change trend of thermal parameters of substrate,and provide help for future dynamic simulation of extensive green roof.Secondly,the thermal parameters of the three kinds of green roof matrix layer used in Guangzhou area were measured in laboratory,and the thermal parameters in the dry and saturated state of Guangzhou were obtained.In this process,the author preliminarily understand the variation trend of the thermal parameters of the selected substrates with the moisture content,and provide the basic thermal parameters for the next simulation study.Then,the author first validated the applicability of EnergyPlus and its green roof model(Material:RoofVegetation)in Guangzhou area,providing the basis for reliability analysis for the next simulation study.The author then compared the EnergyPlus green roof model(Material:RoofVegetation)with the additional thermal resistance.The author thinks that the additional thermal resistance should be a dynamic change value,and put forward the concept of recommended additional thermal resistance.Finally,fitting the variation curve of the recommended additional thermal resistance with the roof heat transfer coefficient.Finally,based on EnergyPlus and its green roof model(Material:RoofVegetation),the author used orthogonal experimental method to analyze the sensitivity of 16 kinds of thermal parameters used in the greening roof simulation,and finally,K(roof structure layer heat transfer coefficient),ST(soil layer thickness),CDS(dry soil thermal conductivity)and LAI(leaf area index)were determined to be the most significant thermal parameters affecting the thermal performance of greening roofs.