You use an IR-thermometer that uses an assumed emissivity value of 0.95. What temperature will it show if a rooms ambient temperature is 20°C and you measure a surface temperature of 80°C and the true emissivity value is: a) 0.98 b) 0.92 c) 0.15

You use an IR-thermometer that uses an assumed emissivity value of 0.95. What temperature will it show if a rooms ambient temperature is 20°C and you measure a surface temperature of 80°C and the true emissivity value is: a) 0.98 b) 0.92 c) 0.15

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter42: Heat Gains And Heat Losses In Structures

Section: Chapter Questions

Problem 7RQ: The typical indoor design temperature used for heat loss calculations is A. 65F. B. 70F. C. 75F. D....

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Question

You use an IR-thermometer that uses an
assumed emissivity value of 0.95. What
temperature will it show if a rooms ambient
temperature is 20°C and you measure a
surface temperature of 80°C and the true
emissivity value is:
a) 0.98
b) 0.92
c) 0.15

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