Nov
15
FRESNEL LENS Flat Mirror 250 Ft Target REDIRECTING SUNLIGHT for SOLAR HEATING
By
This 12 inch flat mirror can redirect sunlight 250 feet – 500 feet to a Fresnel Lens Receiver that can then concentrate sunlight to a target for solar heating and solar cooking. This shows the incredible power of traditional flat mirrors.
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25 Comments
November 15th, 2010 at 4:54 pm
Hey I was wondering if this might work to generate heating air . I envision some kind of drum with a vent, then having the lens heat that, and run a hose into the porch of my house in the winter. I would have a small electric far on the hose end on my porch sucking the hot air in. Your thoughts. trying to get cheap heat.
November 15th, 2010 at 5:35 pm
i did this at home my brother held the mirror and i got the lens in front of the mirror but couldentvideo tape it but have one on how to coook go look at my video on youtube
November 15th, 2010 at 5:40 pm
hello
November 15th, 2010 at 5:51 pm
@red7media The sun will be around for another 5 Billion years or something or did you mean when the sunsets? That wont be a problem as it would be very easy to have backup batteries that are also being charged during the day.
November 15th, 2010 at 6:12 pm
Dan, that is somewhat misleading saying ‘optically good mirror’. First of all, I assume that’s a second surface mirror. Saying ‘optically’ generally means it can be used as a secondary flat mirror, such as in a Newtonian. I would be will to bet a few bucks that mirror is no where near being 1/4 wavelength correct.
November 15th, 2010 at 7:12 pm
@Theskidmark61 Thank you:-)
November 15th, 2010 at 7:51 pm
Great educational piece of work!
November 15th, 2010 at 8:29 pm
Only problem is we loose the sun it’s over.
November 15th, 2010 at 9:00 pm
Hey Dan,
Try this, try heating a tin of water using this process…
November 15th, 2010 at 9:24 pm
What mirror? I did not see a mirror?
The trick of tracking the sun with a mirror to keep it aimed is not expensive?
Otherwise this would seem like a great way of redirecting energy.
November 15th, 2010 at 10:17 pm
Cool experiment!
November 15th, 2010 at 10:40 pm
@C24B9 sure no problemo
November 15th, 2010 at 11:12 pm
@343HFD Thanks for posting that. Need more of that sort of peace-keeping in this world. And, yeah, there’s nothing wrong with being a tree-huggin, rock-lickin, dirt-worshippin’ eco-weenie, is there? (And don’t worry…I’ve been called worse than that!)
Peace, Love & Eternal Grooviness
November 15th, 2010 at 11:43 pm
Nice. But not sure how you could use this. The Sun is continually moving in relation to the Earth. You’d need a tracking mechanism on the mirror mount to continually adjust its angle if you wanted to apply this in any useful way for more than a couple of minutes at a time. Tracking mechanisms require power, and electronic sophistication beyond the average DIYer, so the whole thing starts to get much less simple …
November 16th, 2010 at 12:35 am
We should not be surprised that the sunlight is still effective 250ft from a mirror, after all it has just travelled over 90 million miles before it hit the mirror. That said it is still worthwhile looking at this as it shows how even shaded areas can receive sunlight for solar panels etc. Excellent demonstration.
November 16th, 2010 at 12:42 am
Why not redirect the concentrated light after it hits the Fresnel Lens? So it would act more like a lazer pointer. Burn baby Burn.
November 16th, 2010 at 1:35 am
can you use optic fibres with a fresnel lense to take heat into the house?
November 16th, 2010 at 1:47 am
I really like your new closing music. Much better than the old one!
November 16th, 2010 at 2:24 am
Loved the slow mo of the fly almost getting zapped. “holy sh*t, my ass is on fire..move, move…..”
November 16th, 2010 at 2:37 am
so what happens when u concentrate 5 of those things on one spot
November 16th, 2010 at 3:12 am
@AlexGrim, hey bud srry I was in a bad mood when I posted that. I am accually all for this kinda research because sooner or later we ARE going to need it! Sorry again!!
:)
Be safe
Kp
November 16th, 2010 at 3:37 am
Why would you want to profile Dan Rojas?
November 16th, 2010 at 4:30 am
@343HFD Dan is working with the concepts that can make plenty of fresh water for everybody and end our energy problems. Not run of the mill tree hugger stuff about solar panels and windmills. He covers the standard stuff too, but he goes beyond that. If you had any experience with this stuff, you’d realise how stupid you are for labelling him a simple tree hugger.
November 16th, 2010 at 5:14 am
I hope people understand why you demonstrated this using reflected sunlight. Show how good it works off a solartube next. If ya can? They ain’t cheap.
November 16th, 2010 at 5:46 am
This reminds me of Arcemedies death ray. but on the other hand this is awesome thinking outside the box. You need funding for these projects. You could change the world.