Heating & Cooling of Water

  • Thread starter MrDieselT
  • Start date
  • #1
12
2
Ok so my question is about hot water in a home
Lets say that I take a shower a shower and i use 20 gallons of water at 105* F
If the hot water in my tank is at 140*F
and my cold water comes in at 50*F

how much of hot (140*F) water did i use?
How much cold (50*F) Water did i use?

Now this might be on the same formula but

lets take the volume of 140*F hot water that I used in my shower out of the hot water tank and replace it with the same volume of 50*F Cold water to refill the tank, what will the temperature in the tank be now if its a 80 Gal Tank? (don't worry about the burner bring it up to temp)
 

Answers and Replies

  • #2
741
0
This is a HW type problems and so will be moved from here.
 
  • #3
12
2
I thought it was a thermo problem. Its not a HW type problem if that what your thinking, I own a company that sells solar products (PV & Thermal) and of all the pros and books out there i cant find much on this topic.

I wanted to develop a program that would be able to calculate how much hot water a house uses based on the number of showers, people and other items in a house that use hot water. by finding what the temperature in the tank falls to I can then calculate the BTU's and thus collectors needed to bring the thank back up to temperature.
 
Last edited:

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