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| Chisco1389 |
 Posted: Sat Nov 24, 2007 2:34 pm Post subject: My Solar genarator design |
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Forum Freshman
Joined: 16 Aug 2007
Posts: 10
Location: Texas
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This is my solar generator design. it works off of steam and solar energy. The process all starts at when (A) light from the sun reflects off of a parabolic dish towards its focal point (B) where it reflects on a second parabolic dish. reflecting the light downwards at the angle at which it hit the first dish. (C) it further continues down through a series of Magnifying lenses essentially making a laser. which (D) heats oil in a heating chamber. (E) which causes water in a surrounding chamber to also heat up and evaporate. (F) it is forced to go through a funneling chamber by the shear pressure caused by a lack of space. (G) Once the steam is focused within a safe amount it hits the fans of the turbine. Generating electricity. (H) Once the vapor passes through the fan it keeps rising until it reaches the condensation chamber. It condenses and becomes water. (I) it then flows down a small tube back into the evaporation chamber and the process starts all over again.
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J.F.M.V
Y si alguno prevaleciere contra uno, dos le resistirán; y cordón de tres dobleces no se rompe pronto. |
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| Harold14370 |
| Posted: Sat Nov 24, 2007 4:36 pm Post subject: |
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Forum Professor
Joined: 13 Apr 2007
Posts: 1244
Location: Pennsylvania
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| I see several problems. (1) Your parabolic collector does not track the sun across the sky, so it only works with the sun straight overhead. (2) The second parabola - I don't quite see how it is supposed to work. A parabola directs parallel rays (as from a point souce far away) that strike the mirror onto a collector at the focus of the parabola. But the rays striking the second parabola are not parallel. (3) I really think you need a condenser for your turbine. You'll get a little bit of condensation just due to loss of heat to ambient, but I don't think it will be nearly enough to drive your turbine. |
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| Chisco1389 |
| Posted: Sat Nov 24, 2007 11:21 pm Post subject: |
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Forum Freshman
Joined: 16 Aug 2007
Posts: 10
Location: Texas
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well if the whole top halve of the machine could move much like the weight in a grandfather clock then it could be programmed to track the sun. I thought but now am unsure that if the ray comes down at a 90 degree angle and reflected to a 45 in order to hit the focal point it would reflect back to a 45 when it hit the second. i will ask my math teacher though... i too am not sure about whether it will be enough force to turn the turbine. I think if the water evaporates fast enough and with a condenser which i had not thought to put on there it will work. of course i wont really know unless i build it...
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J.F.M.V
Y si alguno prevaleciere contra uno, dos le resistirán; y cordón de tres dobleces no se rompe pronto. |
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| Guest |
| Posted: Sun Nov 25, 2007 5:55 am Post subject: |
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Your second mirror is the wrong shape it should be convex not concave. The theory is sort of OK it is the same as that used in some high gain radar or radio astronomy telescopes. The magnifying glasses will do no more than reduce the amount of energy passing each one by a few percent. If you have 1KW of energy going down your tube no amount of glasses will increase it. Such glasses only alter the 'energy density per unit area'. "Essentially making a laser"? no, a Laser is something else..
As for the rest of it I think you need to find a material that most efficiently converts light to heat before you think about water oil etc. Look around the internet for a 'solar furnace' and study it then start again.  but well done for trying now go and build a prototype. http://en.wikipedia.org/wiki/Solar_furnace |
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| Pumblechook |
| Posted: Wed Dec 05, 2007 12:38 pm Post subject: |
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Forum Freshman
Joined: 05 Dec 2007
Posts: 31
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You need a 'cassagrain' feed. The small secondary reflector is hyperbolic ....
http://www.radio-electronics.com/info/antennas/parabolic/parabolic_reflector.php
The Sun is never at 90 deg in the UK. You need to track azimuth and elevation. The Sun is lower in the sky wrt to midday.
There are systems like this around the world including California. The snag with a system like this is that an expensive generator set will be idle a lot of the time.....at night obviously and when the Sun is too low in the sky. |
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