M
[email protected]
- Jan 1, 1970
- 0
I'm looking for some advise on heat rise. If I have a chassis (10 x 17
x 19) and I mount two components that dissipate 385W and 256W
respectively, and then have a power supply that supplies those
components power to operate, then I'm assuming (if the power supply is
80% efficient) that my total heat load is somewhere in the 1400W range
(641W + 770W (supply input pwr)). First off, is that a correct
assumption of the heat loading or am I making this way too simple?
Next, based on this heat load, the heat rise is a function of the total
surface area of the chassis (calculated to be about 9.5 sqft). Based
on that, the Watts/square ft = 147W/sqft (1400/9.5 = 147). Curves show
that the heat rise will be off the charts since the charts only go up
to 20W/sqft for something close to 80F temp difference (heat rise as a
function of the ambient air temp)
Does anyone see errors in my calculations or is this the expected heat
rise for this scenario?
x 19) and I mount two components that dissipate 385W and 256W
respectively, and then have a power supply that supplies those
components power to operate, then I'm assuming (if the power supply is
80% efficient) that my total heat load is somewhere in the 1400W range
(641W + 770W (supply input pwr)). First off, is that a correct
assumption of the heat loading or am I making this way too simple?
Next, based on this heat load, the heat rise is a function of the total
surface area of the chassis (calculated to be about 9.5 sqft). Based
on that, the Watts/square ft = 147W/sqft (1400/9.5 = 147). Curves show
that the heat rise will be off the charts since the charts only go up
to 20W/sqft for something close to 80F temp difference (heat rise as a
function of the ambient air temp)
Does anyone see errors in my calculations or is this the expected heat
rise for this scenario?