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Oil Reservoir Heat Loss

Oil Reservoir Heat Loss

Oil Reservoir Heat Loss

(OP)
I need to size a heater for a small aluminum oil reservoir.  It will be operated indoors with minimal air circulation.  The shape is roughly square.  I need a rough approximation of heat lost to the air from the tank.  Does anyone have a rule of thumb value for the convection heat transfer coefficient, based on experience?

Thanks.

RE: Oil Reservoir Heat Loss

enirwin, From an old Crane Engineering Data Manual a liquid to gas free convection transfer shows a U value of approx. 1-3 btu/hr/ft^2/deg.F.

Hope this helps.
saxon

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