Solar collectors - DIY glazing and temp control

YonnyPiscinas

Well-known member
Jan 10, 2020
97
Uruguay - SA
Yes confirmed 60c is the maximum for my pool piping. I cannot turn the water flow off right now.

I'll need to keep the water flowing and keep it on at night to cool the pool down!!
 

YonnyPiscinas

Well-known member
Jan 10, 2020
97
Uruguay - SA
I moved the temp probe to the outside of the glazing. luckily only 46c (quite breezy). As long as the panels have a higher temp. threshold I should be ok.

70c under the glazing but 45c outside the glazing where the piping is routed. Goes to show the glazing is working quite well.

The supplier of the panels is finding out from the manufacturer what the temp threshold is for the plastic material of the panels.
I do not want to damage them due to excessive heat under the glazing.
 
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YonnyPiscinas

Well-known member
Jan 10, 2020
97
Uruguay - SA
You can always uncover you pool at night and just let evaporation help cool it down.

I am getting to the point where it just might make sense to add solar heating to the pool.
Yes I did exactly that last night end enjoyed some late night swimming (few cold beers involved of course but with the hot water and beer I had to visit the restroom more than usual!! LOL).
Lost 3c before midnight. Was a cool breeze that accelerated the cooling process also.
Surprising how fast it loses heat.
A cool 34c at 7am today.

Go for it! I see you're in West Palm Beach also. Ideal location for the solar collectors.

How warm does your pool get without heating in Florida?
 

Katodude

Silver Supporter
Aug 22, 2017
574
West Palm Beach/Florida
The pool is probably around 70 degrees now maybe a little lower its been a little cold here overnight. In the summer it will top out at about 96 degrees which is too hot for me but my wife loves it. Most of the time in the summer it will hover around 88 to 90 degrees. I have a southern facing roof that would be perfect for panels. Really would like to use it to extend the pool season, I would like to start swimming in March and go through November or possibly December which I think the panels would give me.

I could also use it to pre heat the Spa in the winter to help save on the propane bills.
 

YonnyPiscinas

Well-known member
Jan 10, 2020
97
Uruguay - SA
The pool is probably around 70 degrees now maybe a little lower its been a little cold here overnight. In the summer it will top out at about 96 degrees which is too hot for me but my wife loves it. Most of the time in the summer it will hover around 88 to 90 degrees. I have a southern facing roof that would be perfect for panels. Really would like to use it to extend the pool season, I would like to start swimming in March and go through November or possibly December which I think the panels would give me.

I could also use it to pre heat the Spa in the winter to help save on the propane bills.
Wow 90-96 without heating? 90 is a really nice temp. Yes the wives always want it hotter!
But yes to keep that temp going later in the season is where the panels will come in useful.
Luckily our pool is quite small so we can cover it and remove the cover fast and easily. The cover makes a vast difference in heat retention.
 

YonnyPiscinas

Well-known member
Jan 10, 2020
97
Uruguay - SA
Was in the pool at midnight today and to my surprise, a lot of cold water enters the pool through the jets.
Well no it's not flowing but the convection from the underground piping is shocking.

Put your hand around the jets and you can feel cold water convection currents flowing out.
Could do with some plugs for when I want to conserve more of the heat during the colder weeks.
Plus that may just pop out when the pump starts. End of day put them back in.

Update: I believe the cold convection current out of the jets is the water connected to the panels which do not empty at the moment. When the valves are shut off manually this does not occur.
I must get the Vacuum release valve fitted to empty them.
 
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YonnyPiscinas

Well-known member
Jan 10, 2020
97
Uruguay - SA
I'm going to have to start using the panels at nightime to cool the pool a couple of degrees!

My glazing is too efficient during the hot summer months here. Air temp 31c all week this week.

I switched off the flow through the panels today and at 11:30am as the temperature was rising above 75c (167F) under the glazing!!! The blue pool piping is only rated to 60c. I don't want melted pipes again so had to switch on the flow again just to remove the heat.
Currently sitting at 52c under the glazing with half -flow (half being bypassed).

Covers off and jets pointing to the surface.
Pool at 33.8c.
 

YonnyPiscinas

Well-known member
Jan 10, 2020
97
Uruguay - SA
Set up the pump to run through the panels last night until the pool temp fell below 31.5c. Was 35c yesterday
Worked perfectly as the air temp was about 19c.

Cooled the pool down to 31.4c by 5am approx.

Wife put her foot and got the approval. Much nicer temp. But she still hasn't swum today! All for nothing. Lol