home made pool heater

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duraleigh
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home made pool heater

Postby duraleigh » Wed 25 Aug, 2010 19:23

.I can assure you I'd have ZERO leaks.
Then you should give it a go. I think you'll need to make it a little larger to make it effective but there's no technical reason why what you have in mind wouldn't work.


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jjboods
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home made pool heater

Postby jjboods » Thu 26 Aug, 2010 07:54

Do you/does anyone have any input on the setup. Individual lines vs coils? The size of the poly I'm using? I'm actually thinking I'd use 1" instead of 1.5" due to cost.
duraleigh
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home made pool heater

Postby duraleigh » Thu 26 Aug, 2010 10:17

With a 1.5 hp pump, you would probably be happier staying with the 1.5" pipes. 1" pipes restrict the flow and will result in a noticeably higher pressure in the system. With just about any solar heater, a large flow volume is helpful.

I'm not sure what you mean about "individual lines vs coils".
24x52 DIY concrete block and liner
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jjboods
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home made pool heater

Postby jjboods » Thu 26 Aug, 2010 10:26

I figured the 1.5" is a better option for pressure and circulating more water through the heater. I wonder if black PVC is cheaper than poly. Then I can glue the fittings and have less of a chance of leaks and better vacuum creation to help flow.

Running individual 8' sections from top to bottom instead of mounting one continuous coil of poly.
duraleigh
Swimming Pool Wizard
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Joined: Sat 07 Aug, 2010 23:26
My Pool: 24X52 DIY Concrete and liner
Location: Raleigh NC

home made pool heater

Postby duraleigh » Thu 26 Aug, 2010 10:33

PVC won't be cheaper but it is probably the best. Multiple 8' runs will be far better than trying to run a single coil.
24x52 DIY concrete block and liner
1.5HP pump 925lb sand filter
http://www.tftestkits.net
jjboods
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home made pool heater

Postby jjboods » Thu 26 Aug, 2010 10:44

I did some research. Fafco uses 1/4 pipes in their collectors. Isn't that a large strain on a pump and not as efficient for heating than larger diameter? I know the water is in the pipe longer, but you get lower turnover.
duraleigh
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Joined: Sat 07 Aug, 2010 23:26
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home made pool heater

Postby duraleigh » Thu 26 Aug, 2010 11:39

The 1/4 inch "pipes" they use are spaced about every 1/2" so a 4' wide section will contain somewhere around 96 or so "pipes". The water from the manifold does not go up and down through one pipe at a time but, rather is fed simultaneously into all the "pipes" from the bottom manifold or larger pipe.

As 4' sections are added, the water still flows simultaneously through all the "pipes".
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jjboods
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Postby jjboods » Thu 26 Aug, 2010 13:38

The site I saw claims they have 200 1/4 pipes. If I do the math....a 4' section can fit 192 snuggly. So the site was probably rounding up.

That is the same setup I am considering. Indivudually plumbed/connected 8' lengths...water going through them all simultaneously.

Would I still need 1.5" pipe or would my pump not be able to produce the volume for the system?

And would that setup eliminate the significant increase in PSI at the filter?
duraleigh
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Posts: 82
Joined: Sat 07 Aug, 2010 23:26
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Location: Raleigh NC

home made pool heater

Postby duraleigh » Thu 26 Aug, 2010 14:29

Would I still need 1.5" pipe or would my pump not be able to produce the volume for the system?

And would that setup eliminate the significant increase in PSI at the filter?
Both questions are related to resistence. The 1.5" pipe has far less resistance than the 1" and will allow for more flow and less psi.

The more the water comes in contact with any pipe, the greater the resistance. You will have a lot of water in contact with all those tiny pipes so that increases resistance and reduces flow.

The pump has plenty of power to produce adequate volume through the system. Nevertheless, you will have an increase in psi because of the resistance from all the extra pipe surface.
24x52 DIY concrete block and liner
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http://www.tftestkits.net
jjboods
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home made pool heater

Postby jjboods » Thu 26 Aug, 2010 14:39

Either way, I have to think I'd get better flow and less impact on PSI than the Fafco setup.

Correct?

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