This video show how a Fresnel Lens can be used to generate heat in water for a pool. It also illustrates the inability to heat water only. and the need for a dark target. The heat sink used in this video falls short of being a true dark object but the green color looked cool.
Duration : 0:6:21
Primary purpose is to help keep your pool water warm.
Fits on top of your pool water locking down the heat.
SmartPool SunHeater for Above Ground Pools
The SmartPool SunHeater solar pool heating system will raise pool temperature by 10 degrees or more.
For more product information , click here!
December 13th, 2009 at 5:17 am
what about heating …
what about heating up poision leeching plastics to swim in
December 13th, 2009 at 5:17 am
What if you put …
What if you put like a dark food coloring to the water. Would that work?
December 13th, 2009 at 5:17 am
RAINBOW POWER!
RAINBOW POWER!
December 13th, 2009 at 5:17 am
Just admit you …
Just admit you Failed to boil that water… you Failed.
December 13th, 2009 at 5:17 am
if you want a warm …
if you want a warm pool, paint it black or use a black liner.
December 13th, 2009 at 5:17 am
Is it possible to …
Is it possible to set something like that up so it’s not too dangerous to keep on? The lens & area between it and the pot are caged off – say running along the top of a high wall in a walled garden. Even if there’s a tap trickling water into the pot all of the time, so hot water trickles out over fill level to a metal pipe, I suppose you can’t rely on the tap not spilling out for any unexpected reason. Is there a material for this pot? If it’s spilling without touching, the pipe could be O.K.
December 13th, 2009 at 5:17 am
I’m guessing that …
I’m guessing that Fresnel lenses must present a great opportunity for heating swimming pools – by the “boil water in a pot” method that Greenp.s. shows in a video.
I mean a highly organised method, with a pump, a secure pot (that’s not going to disintegrate or burn if the system breaks down) dispelling hot water through a pipe every minute or so & taking in new water. Would the lens size requirement for winter (for the same size pot) be too big home pool, say New York?
December 13th, 2009 at 5:17 am
The Fresnel lens …
The Fresnel lens would have to be significantly larger than the pool to warm the pool. A lens doesn’t increase the amount of heat, it concentrates it from a large area to a small area, so to heat a pool more than the open sun, you would need to increase the amount of sun hitting it, not concentrate a smaller amount of sunlight. If a pool has 10k square inch surface a 200 square inch Fresnel lens hitting it isn’t going to do squat.
December 13th, 2009 at 5:17 am
Yes, Archimedes …
Yes, Archimedes used mirrors to torch units (so the story goes) he also died in that battle, and his side lost. It would be great for torture though. (See articles about the Spanish Inquisition)
December 13th, 2009 at 5:17 am
Archimedes did it.. …
Archimedes did it…. Greeks are millenia in front…
December 13th, 2009 at 5:17 am
Lasers are the …
Lasers are the closest thing. Lenses or dishes with the sun would basically be impossible as all a target would have to do is either be mirrored, reflective white, or stay out of the focal point.
December 13th, 2009 at 5:17 am
God I hope they …
God I hope they don’t use light as weapons that would be painful.
December 13th, 2009 at 5:17 am
Awesome! I love …
Awesome! I love science videos! We will probably be dependent on the sun someday or geothermal, but all energy sources have their pros and cons. 5/5
December 13th, 2009 at 5:17 am
It’s so… PRETTY!!!
It’s so… PRETTY!!!
December 13th, 2009 at 5:17 am
iv been telling …
iv been telling people this for years with the black matts at the bottom of the pool im glade people are starting to wake up and realise..
December 13th, 2009 at 5:17 am
you made a video of …
you made a video of boiling water. why is it featured?
December 13th, 2009 at 5:17 am
When using …
When using parabolic shapes to create a focal point, instead of going to the trouble of lining it with the mylar plastic, why not just paint the outside of it with regular mirror paint? Save time and effort.
December 13th, 2009 at 5:17 am
Very good idea. It …
Very good idea. It could be coupled or added to this concept.
watch?v=tE3QnqlnVOY
Thank you for the comment.
December 13th, 2009 at 5:17 am
hey ive been …
hey ive been checking ure vids for awhile and thanks man they are inspiriing. so anyway how bout put the fresnel oto an a-coil or flat radiator panel (copper) and circulate a tube with another radiator into the water. add a solarpower pump to circulate the heated water and voila right? thats the idea thatsbeen in my headfor awhile
December 13th, 2009 at 5:17 am
put some bleu ink …
put some bleu ink in it .. beleave me works good.. something to absorb the light
and radiation.
December 13th, 2009 at 5:17 am
you do not …
you do not understand the concept of conservation of energy/matter
December 13th, 2009 at 5:17 am
The only way this …
The only way this will work is to gather sunlight from another area outside of the pool perimeter, and add that to what is already hitting the pool. Concentrating the light that would hit the pool anyway will not raise the temperature. You need additional photons from somewhere else. The answer lies in the pool’s ability to absorb the energy from the light which is why the black mats Dan showed at the bottom of the pool are the least expensive and most efficient way to heat it.
December 13th, 2009 at 5:17 am
You could you place …
You could you place a large piece of black builders plastic used in waterproofing concrete slabs. Very cheap, and lite to remove, attach a couple of pull ropes.
December 13th, 2009 at 5:17 am
The same number of …
The same number of photons that normally hit the pool surface will not change because you put a fresnel lens over it. In fact, since a fresnel lens will dis-allow some of those photons to make it to the surface of the pool, there will be a net loss of energy to the pool. The frame of the lens, and the lens itself will either reflect light back out, or absorb it and release it to the air. The aquarium gained additional heat because the lens was larger, and the heat sink collected it.
December 13th, 2009 at 5:17 am
For alanaldapierce- …
For alanaldapierce- It would seem that the sun is still going to hit the rest of your pool like it normally does, but with a concentrated area of heat in one spot generating additional heat. I don’t believe you need a lense larger than your pool to have this work.