Estimating Transient Heat Flows and Measuring Surface Temperatures of a Built-Up Roof
Special rept. Sep 1980-Jun 1981
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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Transient heat flow through a multilayered building component can be estimated using the transfer function method presented in the ASHRAE 1977 Handbook of Fundamentals. Sol-air temperature is one parameter recommended for use in this method, but surface temperatures were shown to be a reasonable substitute. Although the magnitude of the heat flow as calculated with the transfer function appears to be reasonable, more testing should be carried out to determine its accuracy. An infrared camera can measure roof surface temperatures fairly accurately the most accurate measurements were made at night.
- Air Conditioning, Heating, Lighting and Ventilating