@leandrojwfolha This fresnel lens is from an old large screen 60" projection TV. People get rid of those old TV's when they break since they're so large and heavy, but you can scrounge the lenses from them for all kinds of solar projects.
Very good work. Could You check my videos for the tracking solar accumulator ?
As you know, solar tracking is the next step for your solar powered stirling engine.
The accumulator videos show how you can do it on equatorial mount
"Model: Fresnel lens on equatorial mount. Burning leaves" is one of them and another useful one is "Model solar concentrator. It works without the focus moving."
Once a stirling entusiast makes one of these, solar powered stirling will become common.
@gaiatechnician I'd say the one difficulty with your system is that it's best to heat all sides of a Stirling engine heater head equally and the only way I can see that happening is by tracking the engine as well. Uneven heating lowers efficiency and power and can weaken the material. What I did in this video was just a test, not the ideal situation. Any suggestions?
@approtechie Thanks for the quick reply. Maybe if it is a metal ball as the heat collector with a flat "hotplate" at one end and the Stirling head goes against the hotplate? The heat will even out as it goes through the metal.
I found the idea (dual parabolic dish solar or one dish and counterweight) by accident. I think it applies to Fresnel too. And I think a fresnel and counterweight is easier to design than the half parabolic dish method.
Yes, the hot end of your engine does seem to be just black metal. I learned that you need a selective coating, that means one that absorbs normal light well and is bad at emmiting infrared light.
These can be bought as a spray.
Black painted metal absorbs normal light well, but emits infrared light because it heats up. If it would be heated up enough, it would glow and even emit normal light that humans can see.
I wonder if you manufacture this lens? which material! I am also interested in having one of these.
leandrojwfolha 2 months ago
@leandrojwfolha This fresnel lens is from an old large screen 60" projection TV. People get rid of those old TV's when they break since they're so large and heavy, but you can scrounge the lenses from them for all kinds of solar projects.
approtechie 2 months ago
@leandrojwfolha they can be made from plexiglass...
revolt81 1 week ago
use motor oil to spread the heat
nazifdaniel 3 months ago
wooooooooow
good job
MegaMalek95 3 months ago
Use a 10 foot diameter satellite dish to get heat focused on all sides
c5ea 4 months ago
Very good work. Could You check my videos for the tracking solar accumulator ?
As you know, solar tracking is the next step for your solar powered stirling engine.
The accumulator videos show how you can do it on equatorial mount
"Model: Fresnel lens on equatorial mount. Burning leaves" is one of them and another useful one is "Model solar concentrator. It works without the focus moving."
Once a stirling entusiast makes one of these, solar powered stirling will become common.
gaiatechnician 10 months ago
@gaiatechnician I'd say the one difficulty with your system is that it's best to heat all sides of a Stirling engine heater head equally and the only way I can see that happening is by tracking the engine as well. Uneven heating lowers efficiency and power and can weaken the material. What I did in this video was just a test, not the ideal situation. Any suggestions?
approtechie 10 months ago
@approtechie Thanks for the quick reply. Maybe if it is a metal ball as the heat collector with a flat "hotplate" at one end and the Stirling head goes against the hotplate? The heat will even out as it goes through the metal.
I found the idea (dual parabolic dish solar or one dish and counterweight) by accident. I think it applies to Fresnel too. And I think a fresnel and counterweight is easier to design than the half parabolic dish method.
gaiatechnician 10 months ago
@approtechie
Yes, the hot end of your engine does seem to be just black metal. I learned that you need a selective coating, that means one that absorbs normal light well and is bad at emmiting infrared light.
These can be bought as a spray.
Black painted metal absorbs normal light well, but emits infrared light because it heats up. If it would be heated up enough, it would glow and even emit normal light that humans can see.
Rasta8889 2 months ago
Awesome. Sell the plans. Would love to see this on a larger scale running a 12 volt alternator.
TheGrayman1234 1 year ago
Simply amazing!
yellowmetalcyborg 1 year ago
Yep, it is awesome!
specallez 1 year ago
This is awesome! Totally renewable!
-Alan
pianoman210 1 year ago
Thats awesome :)
cena33333333333 1 year ago