Simple Heat Transfer to Electronics Enclosure
Simple Heat Transfer to Electronics Enclosure
(OP)
I need to find out what the final temperature inside an electronics enclosure. I know solar loading in watts, the power output of the electronics internal to the box in watts, and the ambient temperature external to the box. Can someone help me with the formula for finding the final temperature internal to the box? Also, how do I convert watts to joules?
Thanks for your help
Thanks for your help





RE: Simple Heat Transfer to Electronics Enclosure
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RE: Simple Heat Transfer to Electronics Enclosure
RE: Simple Heat Transfer to Electronics Enclosure
RE: Simple Heat Transfer to Electronics Enclosure
Conservation of energy, etc.? http://en.wikipedia.org/wiki/Heat_transfer
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RE: Simple Heat Transfer to Electronics Enclosure
The system is in equilibrium. I know that Q(in) = Q(ex) right?
I have heat dissipation of the electronics internal (Q(in)).
I have ambient temperature T(ex). I have external Q's (Q(solar load), Q(rad), and Q(convection).
I can know the formula for Q(cond) through the wall.
I just need help with setting up the relations to work the problem.
RE: Simple Heat Transfer to Electronics Enclosure
Qin = Qelectronics + Qsolar + Qrad_in
Qout = Qconvective + Qrad_out
You can either use a solver or manual iteration to solve for Tinside, Tsurface_inside, Tsurface_outside
A free heat transfer book: http://web.mit.edu/lienhard/www/ahtt.html
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RE: Simple Heat Transfer to Electronics Enclosure
You might find some of these earlier threads helpful: thread391-287363: Electronics cooling; thread391-290195: Temperature rise in an alum enclosure; thread391-253415: maximum internal temp of computer enclosure; thread391-300762: How to calculate solar heat load on a roof?; thread391-297199: Imitating Solar Load in a Temperature Chamber.
They all deal with heating up of spaces.
However, if they don't address your problem, you might try using the grey search button (next to the green forum button) and doing a search yourself (I only looked in this forum, and not accross the site, for example).
Patricia Lougheed
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RE: Simple Heat Transfer to Electronics Enclosure
RE: Simple Heat Transfer to Electronics Enclosure