Sealed Enclosure Temperature Rise
Sealed Enclosure Temperature Rise
(OP)
Hey Guys,
I have an outdoor equipment enclosure with varios switches and computers that is sealed and normally has AC cooling. I am looking for a way to calculate the rise in temperature per min if the AC were to shut off so that I can establish the time to service for our operations crew.
Can anybody help me with a calculation? Or better yet, a calculator where I can plug in parameters to get the answer?
Thanks in advance for any help.
-Brian
I have an outdoor equipment enclosure with varios switches and computers that is sealed and normally has AC cooling. I am looking for a way to calculate the rise in temperature per min if the AC were to shut off so that I can establish the time to service for our operations crew.
Can anybody help me with a calculation? Or better yet, a calculator where I can plug in parameters to get the answer?
Thanks in advance for any help.
-Brian





RE: Sealed Enclosure Temperature Rise
Probably easier to add a small fan powered by the same back-up power supply as powers the gear. Add a sensor and comm system to call for help.
RE: Sealed Enclosure Temperature Rise
thread248-133761
RE: Sealed Enclosure Temperature Rise
"Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more." Nikola Tesla
Member, P3
wintland (Computer)
(OP)
I anticipated such a response. Nothing is ever easy is it :)
ko99 (Mechanical)
Wintland, your problem is much more complicated than the ohter thread.
jraef (Electrical)
Actually I think using emperical data is going to be the only really valid method anyway.
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RE: Sealed Enclosure Temperature Rise
itsmoked I did read that entire thread, its actually how I stumbled upon this forum but I wasnt sure it applied to my situation as it was attempting to measure surface temperatures of an enclosure (transformer) inside another enclosure. I was hoping my problem would be much more simplistic.
Oh well, I guess we will just have to do some experimentation to figure it out.
Thanks very much for the help, at least now I can stop searching the net for a nifty little calculator.
-Brian
RE: Sealed Enclosure Temperature Rise
For your test: Keep in mind the temperature that matters is the die temperature. The case temperature will rise at a slower rate than the die, perhaps much slower, depending on the mass of the case and the thermal resistance from die to case.
ko (www.ecooling.biz)
RE: Sealed Enclosure Temperature Rise
"Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more." Nikola Tesla
Member, P3
itsmoked (Electrical)
wintland; It would be a relatively straight forward study for you, especially if this stuff is installed and in existence. Just put a couple of sensors in the cabinet next to points of interest and kill the cooling. You should then have a very accurate time/temp curve.
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RE: Sealed Enclosure Temperature Rise
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