Discussion of heat flow meter apparatus and transfer standards used for error analysis

摘要

The need for thermal resistance measurements on thick specimens (100 to 180 mm) of low-density thermal insulation and subsequent changes in ASTM test standards have increased the need for the evaluation of precision and accuracy attainable with the heat flow meter (HFM) apparatus. Such an evaluation is usually performed with transfer standards established on a guarded hot plate. The Division of Building Research of the National Research Council of Canada (DBR/NRCC) has developed a transfer standard and calibrated specimen bank to be used in verifying HMF test procedures and instrument error evaluation. This paper discusses such calibration and the use of the HFM apparatus and reviews the transfer standards developed at NRCC.