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Answer
Here are some very important things to consider when installing solar heating to a pool:
1) the industry standard is called passive heating - it is when you run the pool water through a lot of piping and the solar radiation and air temps put the heat into the water... just like when you leave the garden hose out in the sun and turn on the water... the first bit comes out warm. Other methods of converting solar energy into things like electricity - and using the electricity to heat the water are just too inefficient.
2) Solar heating can only put so much heat into the water, so make sure your expectations are right. Solar will only give you what mother nature gives you in the form of a daytime high temp. So, for instance if the daytime high is 80 degrees, your pool water will not get past 77 or 78. The swim season where I live (Arizona) is typically May-September. With solar, you will be swimming approximately March-October. November-February will not support comfortable swimming temps.
3) Keep the pool covered at night, or else you will lose any heat you put into the pool during the day.
4) Do not use landscaping/irrigation hose for your tubing! The pool chemicals will de-laminate the inside of the pipes, and you will have a MESS!
5) If your pool has an in-floor cleaning system, you need to make sure the system will work hydraulically when the solar array is added. If your system is too restricted, the back pressure on the pool pump will cause it to labor unnecessarily, and the heat transfer will not be very efficient because the water is going too fast through the pipe.
6) automatic valving and temperature sensors are recommended - they will capture heat when the conditions are right. If you forget to set the valves to divert water to the panels, you lose opportunity to put heat into the pool.
THAT BEING SAID... You will generally want to match at the very least, 80% of the pool's surface area in solar surface area. Ideally you want to hit 100%. Going way past 100% is not going to get you much more heat after that (remember, you only can put the daytime temp into the pool). I have seen many do-it-yourself solar projects, and most of them are poorly designed/constructed and wind up costing the homeowner more in fixes/damage than if they just went through a solar company. This is one project I would at the very least, purchase the panels and equipment from a solar panel manufacturer to make sure your investment isn't wasted.
Here are some very important things to consider when installing solar heating to a pool:
1) the industry standard is called passive heating - it is when you run the pool water through a lot of piping and the solar radiation and air temps put the heat into the water... just like when you leave the garden hose out in the sun and turn on the water... the first bit comes out warm. Other methods of converting solar energy into things like electricity - and using the electricity to heat the water are just too inefficient.
2) Solar heating can only put so much heat into the water, so make sure your expectations are right. Solar will only give you what mother nature gives you in the form of a daytime high temp. So, for instance if the daytime high is 80 degrees, your pool water will not get past 77 or 78. The swim season where I live (Arizona) is typically May-September. With solar, you will be swimming approximately March-October. November-February will not support comfortable swimming temps.
3) Keep the pool covered at night, or else you will lose any heat you put into the pool during the day.
4) Do not use landscaping/irrigation hose for your tubing! The pool chemicals will de-laminate the inside of the pipes, and you will have a MESS!
5) If your pool has an in-floor cleaning system, you need to make sure the system will work hydraulically when the solar array is added. If your system is too restricted, the back pressure on the pool pump will cause it to labor unnecessarily, and the heat transfer will not be very efficient because the water is going too fast through the pipe.
6) automatic valving and temperature sensors are recommended - they will capture heat when the conditions are right. If you forget to set the valves to divert water to the panels, you lose opportunity to put heat into the pool.
THAT BEING SAID... You will generally want to match at the very least, 80% of the pool's surface area in solar surface area. Ideally you want to hit 100%. Going way past 100% is not going to get you much more heat after that (remember, you only can put the daytime temp into the pool). I have seen many do-it-yourself solar projects, and most of them are poorly designed/constructed and wind up costing the homeowner more in fixes/damage than if they just went through a solar company. This is one project I would at the very least, purchase the panels and equipment from a solar panel manufacturer to make sure your investment isn't wasted.
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