标准摘要
[中文适用范围]： 本国际标准给出了以下方面的简化计算方法： a) 建筑构件或建筑元件的内表面温度，在给定内部温度和相对湿度的情况下，低于该温度可能会出现霉菌生长。 该方法还可用于评估其他内表面冷凝问题的风险。 b) 评估由于水蒸气扩散而导致间隙凝结的风险。 所使用的方法没有考虑许多重要的物理现象，包括： ——材料特性随水分含量的变化； ——材料内的毛细管吸力和液体水分转移； ——空气从建筑物内部通过间隙或空气空间进入组件； ——材料的吸湿吸湿能力。 c) 因此，该方法仅适用于这些现象的影响可以忽略不计的情况。 两个高防汽层之间的层中任何来源的水干燥所需的时间，以及在干燥过程中组件其他地方发生间隙冷凝的风险。 [外文原描述]： ISO 13788:2012 gives simplified calculation methods for: The internal surface temperature of a building component or building element below which mould growth is likely, given the internal temperature and relative humidity. The method can also be used to assess the risk of other internal surface condensation problems. The assessment of the risk of interstitial condensation due to water vapour diffusion. The method used does not take account of a number of important physical phenomena including the variation of material properties with moisture content; capillary suction and liquid moisture transfer within materials; air movement from within the building into the component through gaps or within air spaces; the hygroscopic moisture capacity of materials. The time taken for water, from any source, in a layer between two high vapour resistance layers to dry out and the risk of interstitial condensation occurring elsewhere in the component during the drying process.
英文名称Hygrothermal performance of building components and building elements — Internal surface temperature to avoid critical surface humidity and interstitial condensation — Calculation methods