Calculate water tank volume from temperature rise, flow time and energy

[FarabiBinImran]

Hi,
I want to calculate volume of a tank ,

1. Tank contains water and it leaves tank at 7 degree celsius and comes back at 11 degree celsius. So ∇T= 4°C.
2. Time required to complately empty 20 Minutes
3. Energy absorbed in raise from 7ºC to 11ºC = 25 KW
I need to calculate the volume of the Tank which contains water! how much water i need.

Thanks

 

[Bystander]

Which volume? At 7 C, or at 11 C?

 

[FarabiBinImran]

Which volume? At 7 C, or at 11 C?

At temperature difference 4 degree Celsius!

 

[NascentOxygen]

Start by calculating how many kg of water are involved. Try wikipedia to refresh your memory of what is meant by the Specific Heat of a substance.

 

[PeterDonis]

At temperature difference 4 degree Celsius!

This doesn't make sense. The water is never at this temperature; it's just a difference in temperatures, not an actual temperature.

To see this clearly, ask yourself what temperature you would be interested in if we were using Kelvin instead of Celsius: the water is changing temperature from 280 K to 284 K. Would you still want its volume at 4 K?

 

[NascentOxygen]

3. Energy absorbed in raise from 7ºC to 11ºC = 25 KW

Energy is measured in kJ. Power is measured in kW. So you need to make a correction to your statement in 3.