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Easy problem with heat transfer from surrounding air to water tank 
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#1
Nov2712, 04:42 AM

P: 2

Hi!
Im doing some measures on a closed water tank with the water temperature 14C and surrounding air with temperature of 20C. I want to know how much heat transfer there is between the surrounding air and the tank. A= 47m2 (area of tank in contact with the surrounding air) Q=UA U=1/(R1+R2+R3) R1= air to tank transfer = 0.12 (i found this value) R2= heat transfer in the tank material = d/λ. d=0.1 λ=1 R3= heat transfer between water and tank material. How do i calculate this? Best regards / Jonas 


#2
Nov2712, 05:38 AM

Mentor
P: 22,239

Welcome to PF!
Unfortunately, heat transfer is not an easy thing to calculate. Fortunately, the heat transfer between water and tank is so good, the Rvalue is near zero so you can ignore it. 


#3
Nov2712, 05:54 AM

P: 2

Thank you very much for your help!



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