Easy problem with heat transfer from surrounding air to water tank

In summary, the conversation was about measuring heat transfer between a closed water tank and the surrounding air. The area of the tank in contact with the air is 47m2, and the heat transfer is calculated using the formula Q=UA, where U is determined by the values of R1, R2, and R3. The R-values for air to tank transfer and heat transfer in the tank material were given, but the R-value for heat transfer between water and tank material is not easily calculable and can be ignored due to its minimal impact.
  • #1
JonasTj
2
0
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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  • #2
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.
 
  • #3
Thank you very much for your help!
 

1. What is the easy problem with heat transfer from surrounding air to water tank?

The easy problem with heat transfer from surrounding air to water tank is that the temperature difference between the air and the water is usually small, making it easier to transfer heat between the two.

2. How does heat transfer occur between the surrounding air and water tank?

Heat transfer occurs between the surrounding air and water tank through convection, where the warmer air transfers its heat to the cooler water through direct contact.

3. What factors affect heat transfer from surrounding air to water tank?

The factors that affect heat transfer from surrounding air to water tank include the temperature difference between the air and water, the surface area of the tank, and the material of the tank.

4. How can heat transfer from surrounding air to water tank be improved?

Heat transfer from surrounding air to water tank can be improved by increasing the surface area of the tank, using a material with high thermal conductivity, and using fans to increase air movement and convection.

5. What are the practical applications of understanding heat transfer from surrounding air to water tank?

Understanding heat transfer from surrounding air to water tank is important in various industries such as heating and cooling systems, thermal energy storage, and food and beverage processing. It is also relevant for everyday activities like cooking, bathing, and swimming.

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