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围护结构传热系数的修正系数(εi)是建筑能耗计算过程中的重要参数。然而,目前的εi值对地区气候差异、围护结构类型的考虑都很粗略,特别是对太阳能富集地区。该文在分析的基础上得到了西藏自治区4个典型城市准确的εi值。计算过程中考虑了气候状况、外窗框材、玻璃层数及墙体面层材料等因素的影响。结果表明,西藏自治区的εi值与采暖期室外平均温度相近的地区有很大的差别。因此,该文的结果不仅可使该地区围护结构传热计算更加准确,同时也为窗户类型、墙体表面材料及遮阳措施的合理选用提供了依据。
The correction coefficient (εi) of the heat transfer coefficient of the envelope is an important parameter in the calculation of building energy consumption. However, the current εi values are very rough for regional climate differences and types of envelope structures, especially for solar-enriched areas. Based on the analysis, this paper obtains the accurate εi values of four typical cities in the Tibet Autonomous Region. The calculation process takes into account factors such as climate conditions, outer window frames, glass layers and wall coverings. The results show that the εi values in the Tibet Autonomous Region are quite different from those of the outdoor average temperature in the heating period. Therefore, the result of this paper can not only make the heat transfer calculation of the envelope in the area more accurate, but also provide the basis for the reasonable selection of window type, wall surface material and sunshade measures.