1 reply to this topic

[RichardKim06]

Dear all,
 
I want to calculate the amount of time it takes to reduce the temperature of a stainless steel cylinder (D=2", L=20") which is filled with water from 80°C to 60°C at an ambient temperature of 24°C.
 
I'm struggling with Newton's Cooling Law and the natural convection correlations. I calculate the convection coefficient to be h = 2390 W/m2K. When I use this in newton's cooling law my result is that the delta T of 20 degrees is achieved within 0+ seconds. What am I missing or doing wrong?
 
Thanks already for your help!

Edited by RichardKim06, 15 January 2015 - 01:19 PM.

[breizh]

Hi Richard,

 

 

http://www.nzifst.or...httrtheory4.htm

 

Take a look at this link or to other heat transfer text book .

 

Good luck.

 

Breizh

Edited by breizh, 18 January 2015 - 06:08 AM.