The paper describes a method to determine the so-called design value of the thermal conductivity of insulation materials. The procedure involves determination of moisture conversion factors to convert between the so-called declared values, which are obtained directly or indirectly from measurements, and the design values that are characteristic of the in-use conditions of the products. The declared and design values of thermal conductivity, as well as the moisture conversion factor are introduced in the international standard EN ISO 10456, but it is left open how to determine the design values for materials at the conditions under which they are typically used in building constructions. The paper presents a proposal, using numerical prediction of the hygrothermal conditions of the materials, of how to estimate the design value.
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机译：本文描述了一种确定绝缘材料导热率的所谓设计值的方法。该过程涉及测定水分转换因子，以在所谓的声明值之间转换，该值直接或间接地从测量中获得，以及具有产品中使用条件的特征的设计值。在国际标准EN ISO 10456中引入了导热率的声明和设计值，以及湿度转换因子，但它留下了如何确定在通常用于建筑物的条件下材料的设计值建筑。本文提出了一个提案，使用了材料的湿热条件的数值预测，如何估计设计价值。
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