摘要
采用四阶谐量傅氏级数表达的室外综合温度函数作为墙体外侧的边界条件,利用墙体热工系统理论分析了拉萨地区节能墙体不同朝向和不同构造对延迟时间与衰减倍数的影响。分析结果表明,墙体的朝向、墙体构造方式、墙材的热物理参数等均对延迟时间和衰减倍数具有显著影响,其中以蓄热系数较大的灰沙砖为主体材料的外保温构造墙体具有最大的衰减倍数和较长的延迟时间。
The 4th-order harmonic Fourier series to express the outdoor sol-air temperature function is adopted as the wall outside boundary conditions,and the theory of wall-body thermal system is used to analyze the effect of different wall orientations and different formation of energy-saving wall bodies in Lhasa area upon time lag and decrement factor.The analytical results indicate that wall orientation,wall body configuration patterns and wall material thermo-physical parameters,etc.can have the obvious effect upon time lag and decrement factor of which the exterior insulation configuration with sand-lime brick masonry with large storage coefficient is of the maximum decrement factor and longer time lag.
出处
《西安理工大学学报》
CAS
北大核心
2011年第2期177-184,共8页
Journal of Xi'an University of Technology
基金
国家自然科学基金重点资助项目(50638040)
关键词
节能构造
室外综合温度
傅氏级数
延迟与衰减
热稳定性
energy-saving formations
outdoor sol-air temperature
Fourier series
time lag and decrement factor
thermal stability
