Heat loss from tank roof
Heat loss from tank roof
(OP)
We have a client who stores coal tar liquids in atmospheric cone roof tanks. Storage temperature is around 175 deg F. While the tanks are mostly insulated, some have had insulation removed from the roof because of external (under insulation) corrosion. We want to estimate the heat loss from the tank roof, with and without insulation. Our problem is as follows. If the tank is half full on average with a liquid temperature of 175 deg F, what temperature would the vapour above the liquid be. This would be the temperature that drives the heat out through the roof. Would it be close to the liquid bulk temperature. Does it depend on the oil vapour pressure. Any ideas would be appreciated.





RE: Heat loss from tank roof
RE: Heat loss from tank roof
RE: Heat loss from tank roof
RE: Heat loss from tank roof
HAZOP at www.curryhydrocarbons.ca
RE: Heat loss from tank roof
RE: Heat loss from tank roof
I actually think this is unlikely, you must have some thick stuff to keep it at 175 F.
2) aspearini1 is right, you need to measure some temperatures. I suggest you get several data loggers & track the inside roof T, outside roof T and ambient T.
On your way up the ladder, check some outside wall T’s, too. There may be a T gradient re 25362’s idea.
Probably, watch the Weather Channel & write down the wind speed hourly.
And, of course, any precipitation.