HEAT LOSS IN AN AGITATED TANK

[chemwizaard]

Dear Sir,

I am looking to calculate heat required to maintain a cylindrical insulated tank with heavy oil @160 F. The oil is heavy oil like a sludge. The heating medium will be a condensing steam at 130 psig and 355 F using steam templates in tank.

The tank will also be in circulation and constantly oil is added and fed to a tower at the same time a liquid hold up is there.

Tank dimensions are dia 12' height 30' and the liqd level hold up 15 ft.

The question is how do i calculate the heat required to keep the tank at the temp of 160. the ambient temp is 85F.

Kindly reply

 

[IRstuff]

How do you find the transfer coefficient of the tank?

What class is this for?

TTFN

 

[MJCronin]

Chemwizard (?)

An excellent lesson on practical heat transfer and the selection, design and maintenance of steam systems is by Spirax Sarco.

http://www.spiraxsarco.com.

Within these modules are "rules of thumb" containing heat transfer coefficients for tanks in your situation.

Use 0.4 BTU/ft2 degree F for an average coefficient of an insulated tank in this temperature range. Calulate the steam required.

My opinion only

-MJC