[Shop-talk] pool cooler

[shochschild at att.net]

Wow, so if I piped a radiator into the system and pumped through it at 
night, it would cool?  Great, this is just the kind of thing I would 
like to try. 

Givens:  Say it is 100 during the day, and drops to 80 at night.  My 
pool is about 92 right now and getting warmer daily.  If I could get it 
down to 85 it would be well worth it.

I have at least two car radiators in the junk pile, rather, I meant to 
say, in inventory.
How much radiator surface?  Would 4 be twice as effective as 2?  Should 
I spray them black?
Do I need to run a fan through them; in other words how important is air 
flow to the heat transfer?

If I pipe them into the return from the filter system, then I wouldn't 
have to even worry about a pump -- is there a cheap and easy 
thermostatic control to switch a valve whenever ambient < pool temp?

I envision a simple array of car radiators on a frame with radiator 
tubing connecting them in parallel, set up as a separate loop back under 
the trees where the filter, pump, and chlorinator are.

If this works, it will be a very popular Instructable.  Everyone wants 
their pool cooler around here...

Thanks!

P.S. For the OP, yes, a simple pool cover will make your pool warm enuff 
for anyone.  They are a pain unless you get an automatic as recommended, 
or even just a spool that you turn the crank on manually. 



> Solar pool heater, run when the sun isn't shining.  Radiative cooling
> works as well as radiative heating.  (Better, some times.  The night
> sky is a lot colder than the day time sky is warm.)