Hello everyone,
I am trying to model domestic water heaters and need to estimate entering water temperature. Is there any database or procedure that I can use to estimate this value? I am doing spreadsheet calcs using hourly output. I would appreciate your suggestions and advice.
Thanks
Ana
It would depend on what your city water source was. If the water is coming
out of the ground, as in a well, it's usually somewhere around 50F. If it
comes from a reservoir it might be colder or warmer. I bet your city water
department could give you some info. Or, there's always Google....
Good Luck,
Carol
Ana:
Best reference I've ever come across (with example calcs) which mimics the
approach of E+ as I understand it can be found here:
http://apps1.eere.energy.gov/buildings/publications/pdfs/building_america/44
816.pdf
See page 22 (of 49) for the inlet mains equation, alonog with a plot of
Chicago IL TMY2 results so you can Q/A your implementation of Equation 4
(correct placement of parenthesis in this makes a BIG difference)
All the Best,
_Chris
Chris,
Thank you for attaching this reference. This is a realy good source of information. Thanks to all of you for your help and suggestions.
Ana