Electronic equipment cooling. 3

[lyletk]

I have an electronic device that runs off of 400 Hz power and dissipates 350 watts of heat. It has<br>
a thermostatically controlled fan that kicks in to provide cooling. The problem is that the 400 Hz<br>
fan is extremely loud. My plan is to duct refrigerated air into the intake opening in the side of the<br>
unit in an attempt to prevent the 400 Hz fan from every kicking on. My experience with cooling<br>
systems is very limited and I require the appropriate equations to calculate the cooling of the<br>
proposed system.<br>
<br>
q=h(Tout-Tin) doesn't really tell me straight out that a 600 cfm air flow at 55 degrees F is<br>
sufficient. My guess is that it will work but I would like some confirmation please.

 

[TedT]

q=1.08xCFMxDeltaT (BTU/Hr)<br>
(0.24 Btu/LbAirx60sec/minx0.075Lb/ft3=1.08)<br>
therefore: q=1.08x600x(75-55)/3.413 BTU/Watt = 3800W<br>
Keep in mind that you've got about a ton of cooling to cool 3 lightbulbs! If your delta T is higher then you even have more!<br>