Standard Practice for Calculating Thermal Transmission Properties under Steady-State Conditions
|Publication Date:||10 August 1997|
|ICS Code (Heat. Calorimetry):||17.200.10|
1.1 This practice covers requirements and guidelines for the determination of thermal transmission properties based upon steady-state one dimensional heat transfer tests on a thermal insulation material or system for which values of heat flux, surface or air temperatures, and specimen geometry are reported from standard test methods.
1.2 The thermal transmission properties described include: thermal conductance, thermal resistance, apparent thermal conductivity, apparent thermal resistivity, surface conductance, surface resistance, and overall thermal resistance or transmittance.
1.3 This practice is restricted to calculation of thermal transmission properties from heat transfer data generated by standard test methods. These methods include: (1) planar geometries such as those used in Test Methods C 177, C 236, C 518, C 745, C 976, and C 1114, and (2) radial geometries such as those used in Test Methods C 335 and C 1033.
1.4 This practice includes the procedure for development of thermal conductivity as a function of temperature equation from data generated by standard test methods.
1.5 The values stated in SI units are to be regarded as the standard.
1.6 The attached appendixes provide discussions of the thermal properties of thermal insulating materials, the development of the basic relationships used in this practice, and examples of their use.