Measurement of Monochromatic Emittance of Nonconductors at Moderate Temperatures

[+] Author and Article Information
John W. McCulloch, J. Edward Sunderland

Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, N. C.

J. Heat Transfer 92(2), 231-236 (May 01, 1970) (6 pages) doi:10.1115/1.3449654 History: Received July 10, 1969; Revised November 01, 1969; Online August 11, 2010


The measurement of the monochromatic emittance of thermal insulators at temperatures near room temperature is discussed. Results for the spectral emittance of freeze-dried beef are presented. For temperatures between 115 F and 125 deg F, the emittance is between 0.7 and 0.85. These values compare favorably with existing total emittance data. A discussion of the error involved in making such measurements is discussed in detail.

Copyright © 1970 by ASME
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