Finned pipe - Approximate thermal calculator

[mrtangent2]

Hi,

I'm after some short advice here or a decent rule of thumb calculator to approximate the potential to cool about 1.5 te/hr in 1 inch pipe from around 200 to 60 C in finned pipe.

Its a basic oil fluid.

From a quick google search typical HTC id assume would be 500 w/m2 K, but I need a rough area to approximate.

looking for a calculator - doesnt seem like its in aspen / EDR..

thanks in advance

J

 

[pierreick]

HI,
Try this link , there is a spreadsheet at the bottom of the document:

https://cheguide.com/air_cooled_exch.html

Good luck
Pierre

 

[mrtangent2]

thanks, unfortunately it needs fan..

but a nice excel file .

 

[pierreick]

Hi ,
I did some calculation and find a heat transfer coefficient 10 time lower than what you wrote in your post .
Properties of the inside fluid are those for Duratherm LT @ 250C and for the outside those for air @ 10C with a velocity of 5 m/s .
results :
U 53.842 w/m2 K

Q loss 2.37E+05 W
1139.7 w/m
Tout 60.4 C

I believe this is not workable using a finned single pipe .

Good luck
Pierre