This paper evaluates the potential of building envelope to save energy associated with the total electricity consumed. It summarizes the simulation analysis to determine the effectiveness of envelope construction in r...This paper evaluates the potential of building envelope to save energy associated with the total electricity consumed. It summarizes the simulation analysis to determine the effectiveness of envelope construction in reducing total electrical consumption for residential buildings in Egypt. This paper studied the effect of the building envelope construction, orientation, window opening area as a ratio of wall area, and the glazing type for Cairo and Alexandria. It was determined that for most residential buildings in Egypt with SHGC values above 0.61, increases the total electrical consumption by 25%. Roof and wall insulation provides significant energy savings, 40% for the roofs and 12% for walls.展开更多
Globally,the building sector is responsible for 40%of energy use and 30%of GHG emissions.The greatest portion of the energy is used during the operational phase(use stage)of buildings.The building envelope,especially ...Globally,the building sector is responsible for 40%of energy use and 30%of GHG emissions.The greatest portion of the energy is used during the operational phase(use stage)of buildings.The building envelope,especially the glazed components,plays an important role in determining the energy requirement of buildings.These glazed parts of the building envelope exposed to direct solar radiation are most vulnerable to heat loss and gain.Heat loss and gain through the glazing material depend on glazing properties(U-value,SHGC,VT)and building energy use changes according to the properties of the glazing system.A variety of glazing types has been developed over recent decades that use the properties of the glass as a means of responding to environmental conditions.This study is carried out to identify the optimum glazing property for conserving energy in cooling dominant regions using an early design energy modeling tool.It was found that a low SHGC is the most important glazing property for reducing cooling energy consumption.SHGC of less than 0.3 is found useful.This study would help building industry professionals evaluate the best glazing property while selecting the glazing type.展开更多
该文提出了1种半透明光伏窗太阳得热系数(Solar heat gain coefficient,SHGC)的简易室外测试方法。首先通过室外实验研究了不同运行状态下半透明光伏窗的SHGC,实验结果表明,光伏窗开路(Open circuit,OC)状态下的SHGC显著高于最大功率点(...该文提出了1种半透明光伏窗太阳得热系数(Solar heat gain coefficient,SHGC)的简易室外测试方法。首先通过室外实验研究了不同运行状态下半透明光伏窗的SHGC,实验结果表明,光伏窗开路(Open circuit,OC)状态下的SHGC显著高于最大功率点(Maximum power point,MPP)状态下的SHGC,两者的SHGC差异最高可达11.5%;其次,通过理论分析研究了电池覆盖率对不同运行状态下光伏窗SHGC的影响,同时探究了不同类型光伏窗在上述2种运行状态下的SHGC差异。该文的分析结果将为更准确地评价光伏窗的热工性能和空调负荷计算提供指导,并推动光伏建筑一体化技术发展。展开更多
文摘This paper evaluates the potential of building envelope to save energy associated with the total electricity consumed. It summarizes the simulation analysis to determine the effectiveness of envelope construction in reducing total electrical consumption for residential buildings in Egypt. This paper studied the effect of the building envelope construction, orientation, window opening area as a ratio of wall area, and the glazing type for Cairo and Alexandria. It was determined that for most residential buildings in Egypt with SHGC values above 0.61, increases the total electrical consumption by 25%. Roof and wall insulation provides significant energy savings, 40% for the roofs and 12% for walls.
文摘Globally,the building sector is responsible for 40%of energy use and 30%of GHG emissions.The greatest portion of the energy is used during the operational phase(use stage)of buildings.The building envelope,especially the glazed components,plays an important role in determining the energy requirement of buildings.These glazed parts of the building envelope exposed to direct solar radiation are most vulnerable to heat loss and gain.Heat loss and gain through the glazing material depend on glazing properties(U-value,SHGC,VT)and building energy use changes according to the properties of the glazing system.A variety of glazing types has been developed over recent decades that use the properties of the glass as a means of responding to environmental conditions.This study is carried out to identify the optimum glazing property for conserving energy in cooling dominant regions using an early design energy modeling tool.It was found that a low SHGC is the most important glazing property for reducing cooling energy consumption.SHGC of less than 0.3 is found useful.This study would help building industry professionals evaluate the best glazing property while selecting the glazing type.
文摘该文提出了1种半透明光伏窗太阳得热系数(Solar heat gain coefficient,SHGC)的简易室外测试方法。首先通过室外实验研究了不同运行状态下半透明光伏窗的SHGC,实验结果表明,光伏窗开路(Open circuit,OC)状态下的SHGC显著高于最大功率点(Maximum power point,MPP)状态下的SHGC,两者的SHGC差异最高可达11.5%;其次,通过理论分析研究了电池覆盖率对不同运行状态下光伏窗SHGC的影响,同时探究了不同类型光伏窗在上述2种运行状态下的SHGC差异。该文的分析结果将为更准确地评价光伏窗的热工性能和空调负荷计算提供指导,并推动光伏建筑一体化技术发展。
