A WIDE ANGLE HEAT FLUX METER

S. OSUWAN

Summary: A heat flux meter, which measures directly the flux of radiant energy and the flux of total energy integrated throughout a hemisphere, is described. The instrument is suitable for the measurement of the intensity of thermal energy in the range 200-20,000 BTU/h ft². It produces an e.m.f. directly proportional to intensity and has a very low time constant. The instrument is especially suitable for heat flux measurements in furnaces or high temperature systems. It may also be made to measure the radiant energy from the sun. Equations are derived to predict its performance, and the results are compared with experimental values.

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Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.

Received 18 November 1976