Tank bottoms heat loss
Tank bottoms heat loss
(OP)
Does anyone have the theory, derivation and/or expressions for the heat loss through the bottom of a heated storage tank sitting on the ground.
For example, a heated storage tank holding molten bitumen at 150-170degC, sitting on a layer of sand say 300mm thick followed by a semi infinite depth of wet earth.
Thanks in advance.
For example, a heated storage tank holding molten bitumen at 150-170degC, sitting on a layer of sand say 300mm thick followed by a semi infinite depth of wet earth.
Thanks in advance.





RE: Tank bottoms heat loss
TTFN (ta ta for now)
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RE: Tank bottoms heat loss
Am hoping someone out there might have something more exact.
RE: Tank bottoms heat loss
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Tank bottoms heat loss
RE: Tank bottoms heat loss
This is where the problem is. "half the total drop" means that 75C or 100C is measurable on an interior or external surface; this means HIGH heat transfer, e.g., 75C against 25C wet soil is a huge heat loss. Likewise, 100C on the inside wall of the tank means a huge heat loss. Only when the temperature delta is fully dropped across the wall, liner, and insulation, AND you have a low heat transfer coefficient do you have optimal insulation.
Another example, your hot water heater with warm to the touch outside is losing measurable heat. When sufficient insulation is added, the outside wall will feel exactly like the external ambient and little heat is lost.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Tank bottoms heat loss
There may also be a significant film resistance due to natural convection on the inside of the tank that would need to be accounted for also.
Thanks folks