标准摘要
[中文适用范围]： ISO 9869 的这一部分描述了用于测量飞机建筑部件热传输特性的热流计方法，该部件主要由垂直于热流且没有明显横向热流的不透明层组成。 可测量的特性有： a) 从表面到表面的热阻 R 和热导 Λ； b) 总热阻 RT 和环境间的透射率 U（如果两个环境的环境温度均已明确定义）。 热流计测量方法也适用于由垂直于热流的准均匀层组成的组件，前提是靠近热流计（HFM）的任何不均匀层的尺寸远小于其横向尺寸并且不可以通过红外热成像技术检测到的热桥（见 6.1.1）。 ISO 9869的这一部分描述了要使用的设备、设备的校准程序、安装和测量程序、数据分析，包括系统误差的校正和报告格式。 注 1：它并不是一种替代实验室仪器（如 ISO 8990:1994 中规定的热箱）的高精度方法。 注 2：对于其他部件，可以使用热量计或通过对多个热流计测量结果进行平均来获得平均热传导率。 注3：在热容量较大的建筑中，部件的平均热透射率可以通过长时间测量获得，或者部件的表观透射率可以通过其热吸收响应的动态分析来估计（见附录B） 。 [外文原描述]： ISO 9869-1:2014 describes the heat flow meter method for the measurement of the thermal transmission properties of plane building components, primarily consisting of opaque layers perpendicular to the heat flow and having no significant lateral heat flow. The properties which can be measured are: a) the thermal resistance, R , and thermal conductance, Λ , from surface to surface; b) the total thermal resistance, R T, and transmittance from environment to environment, U , if the environmental temperatures of both environments are well defined. The heat flow meter measurement method is also suitable for components consisting of quasi homogeneous layers perpendicular to the heat flow, provided that the dimensions of any inhomogeneity in close proximity to the heat flow meter (HFM) is much smaller than its lateral dimensions and are not thermal bridges which can be detected by infrared thermography. ISO 9869-1:2014 describes the apparatus to be used, the calibration procedure for the apparatus, the installation and the measurement procedures, the analysis of the data, including the correction of systematic errors and the reporting format.
英文名称Thermal insulation — Building elements — In-situ measurement of thermal resistance and thermal transmittance — Part 1: Heat flow meter method