Should radiation be included in our Heat sink calculations?

MWz · May 11, 2010, 08:09

We have an outdoor enclosure with an external finned heat that uses a sun shade and natural convention. Should we use the "include radiation" option that is avalible on most heat sink performance calculators?

Jade M · May 11, 2010, 14:24

Estimate the radiative heat transfer using differences between the quantities epsilon*sigma*temperature^4 where epsilon is the emissivity and sigma is the Stefan-Boltzman constant. Compare this result with the characteristic heat transfer due to natural convection. Decide whether ths contribution from radiation is small enough to neglect.

May 11, 2010, 08:09	Should radiation be included in our Heat sink calculations?	#1
MWz New Member Mark Join Date: May 2010 Posts: 1 Rep Power: 0	We have an outdoor enclosure with an external finned heat that uses a sun shade and natural convention. Should we use the "include radiation" option that is avalible on most heat sink performance calculators?

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May 11, 2010, 14:24		#2
Jade M Senior Member Join Date: Feb 2010 Posts: 148 Rep Power: 17	Estimate the radiative heat transfer using differences between the quantities epsilonsigmatemperature^4 where epsilon is the emissivity and sigma is the Stefan-Boltzman constant. Compare this result with the characteristic heat transfer due to natural convection. Decide whether ths contribution from radiation is small enough to neglect.