Calculating Heat Loss
Calculating Heat Loss
(OP)
I am calculating for the heat loss in valves. Is it possible to use the "equivalent lenght" of a valve used in pressure drop calculations to compute for the total heat loss?
Heat loss in un-insulated valve:
Fluid = Steam
Temp = 340F
Pipe Size = 24"
Valve Size = 24"
Pipe and Valve material = Steel
Ambient Temp = 80F
Wind Velocity = 10kph
Thanks.
Heat loss in un-insulated valve:
Fluid = Steam
Temp = 340F
Pipe Size = 24"
Valve Size = 24"
Pipe and Valve material = Steel
Ambient Temp = 80F
Wind Velocity = 10kph
Thanks.





RE: Calculating Heat Loss
RE: Calculating Heat Loss
Best to you,
Goober Dave
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RE: Calculating Heat Loss
There is an ASTM standard (specifically C1129) which deals with the estimation of heat losses from valves. As pointed out above by DRWeig it has to do with the surface area of the valve and with the steady-state heat transfer theory as per practice C680.
There should be something useful at the link below:
http://www.pipeinsulation.org/pages_v4/details.htm...
There you’ll find a downloadable software that allows to compute heat losses from pipes and fittings.
RE: Calculating Heat Loss
RE: Calculating Heat Loss