标准编号：ISO 9869-1:2014
中文名称：保温,建筑元素 英制测量热阻和热透射率 第1部分：热流计法
英文名称：Thermal insulation — Building elements — In-situ measurement of thermal resistance and thermal transmittance — Part 1: Heat flow meter method
发布日期：2014-08
标准范围
This part of ISO 9869 describes the heat flow meter method for the measurement of the thermaltransmission properties of plane building components, primarily consisting of opaque layersperpendicular 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, RT, and transmittance from environment to environment, U, if theenvironmental temperatures of both environments are well defined.The heat flow meter measurement method is also suitable for components consisting of quasihomogeneous layers perpendicular to the heat flow, provided that the dimensions of any inhomogeneityin close proximity to the heat flow meter (HFM) is much smaller than its lateral dimensions and are notthermal bridges which can be detected by infrared thermography (see 6.1.1).This part of ISO 9869 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 ofsystematic errors and the reporting format.NOTE 1 It is not intended as a high precision method replacing the laboratory instruments such as hot boxesthat are specified in ISO 8990:1994.NOTE 2 For other components, an average thermal transmittance may be obtained using a calorimeter or byaveraging the results of several heat flow meter measurements.NOTE 3 In building with large heat capacities, the average thermal transmittance of a component can beobtained by measurement over an extended period, or the apparent transmittance of the part can be estimatedby a dynamic analysis of its thermal absorption response (see Annex B).
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