Novel Methods for Measuring Heat Flux in Industrial Furnaces

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Title Novel Methods for Measuring Heat Flux in Industrial Furnaces
Creator Lam, C.S.; Ramadan, O.B.; Hughes, P.M.; Wong, J.; Lycett, R.
Date 2012-09-06
Abstract Heat flux measurements were conducted in a pilot-scale furnace using an infrared (IR) camera and a non-water-cooled, total heat flux gauge (THFG). The IR camera detected radiation reflected and emitted by the surfaces being viewed, while the THFG was designed such that the heat incident on the sensing surface flowed through the gauge primarily in one dimension, allowing use of a one-dimensional conduction analysis to estimate the total incident heat flux. In the present tests, the IR camera was aimed at the sensing surface of the THFG and the heat flux results from both measurement methods compared. The heat flux levels estimated using the THFG and IR camera generally agreed to within 5%. Factors that may have contributed to differences between the results included (1) convective heat flux, which would have influenced the response of the THFG but not the IR camera, (2) re-emission of only part of the heat flux incident on the THFG from the gauge back to the IR camera, and (3) attenuation and emission of radiation by the combustion gases (especially CO2) and atmosphere between the THFG and IR camera. With the last factor mitigated by the presence of an appropriate filter in front of the IR camera, the other factors did not appear to significantly affect the measured heat flux levels, based on the overall agreement of the results from the THFG and IR camera.
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ARK ark:/87278/s62n54xb
Setname uu_afrc
Date Created 2013-02-12
Date Modified 2021-05-06
ID 14330
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