Easy problem with heat transfer from surrounding air to water tank

AI Thread Summary
The discussion focuses on calculating heat transfer from surrounding air to a closed water tank, with specific temperatures provided for both the water and air. The area of the tank in contact with the air is given as 47m2, and the user outlines the formula Q=UA, where U is derived from thermal resistances R1, R2, and R3. R1 is known, while R2 is calculated based on the tank material's thickness and thermal conductivity. It is noted that the heat transfer between the water and the tank material is negligible due to a very low R-value, allowing it to be ignored in calculations. The conversation emphasizes the complexities of heat transfer calculations while providing a simplified approach for this scenario.
JonasTj
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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
 
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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 R-value is near zero so you can ignore it.
 
Thank you very much for your help!
 

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