Ambient heat transfer coefficent
Ambient heat transfer coefficent
(OP)
I was involved into insulation design and process unit thermal calculation.It is to my knowlege that no clear defined ambient heat transfer coefficent(convective and radiative combined). Several design spec defined equations but their results varied in 10 times. I am wanting to know if there is published code or practice in how to evaluate this value.
I am asking specificlly heat transfer coefficient for ambient exposed insulated tank , vessel and cold box.
Thanks
I am asking specificlly heat transfer coefficient for ambient exposed insulated tank , vessel and cold box.
Thanks
It boils down to simple math.





RE: Ambient heat transfer coefficent
Regards,
athomas236
RE: Ambient heat transfer coefficent
There was a good article in the Petroleum Refiner issue of May 1959 (!) Vol. 38 No. 5 titled Find Heat Losses Graphically by Charle R. Kise. You may find it in a technical library.
RE: Ambient heat transfer coefficent
TTFN
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RE: Ambient heat transfer coefficent
ASTM-C680 has a good coverage of all my questions. Especially it refers back to Frank Incropera 's heat transfer book which I happened to own and which was one of my favorite book. Following this, I may be able to develop a standard MathCAD "black box" for future inputs plugged in.
I tried my techstreet subscription and university library but had no luck either on BS EN ISO 12241 or Petroleum Refiner journal paper.
Thanks again for your help.
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It boils down to simple math.