I posted in another thread about how to keep my water temp from dropping below a certain level, but then I wondered if that was even logical. I brought my temp up from opening temp of about 50 degrees to 80 degrees so we could swim on a few nice days. My thought was that now I should keep my pool from dropping to low (say not less than 70) just so I don't have to heat it up again. I wasn't thinking so much about the time involved as the cost to keep heating from a cold temp. That way for the spring when we only get a few days at a time of swimming weather, I could reheat for less money (and certainly less time).
Then I wondered, does it even matter? Would it be less expensive (use less gas) to keep it warm and bring it to swimming temp from a mid range temperature or would it be the same as letting it go down to whatever and just reheat the hole thing. I'm kind of thinking that it would be the same It seems like either way I'd be replacing the heat lost. So it would either be a few dollars every day or a bunch of dollars the day before we swim.
What are your thoughts. Any thermodynamic engineers here?
Then I wondered, does it even matter? Would it be less expensive (use less gas) to keep it warm and bring it to swimming temp from a mid range temperature or would it be the same as letting it go down to whatever and just reheat the hole thing. I'm kind of thinking that it would be the same It seems like either way I'd be replacing the heat lost. So it would either be a few dollars every day or a bunch of dollars the day before we swim.
What are your thoughts. Any thermodynamic engineers here?