Subject:
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Re: Solar Cell Output in Direct Sunlight
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Newsgroups:
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lugnet.robotics, lugnet.dacta
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Date:
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Sun, 25 Mar 2001 06:58:28 GMT
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Reply-To:
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micahx@kih.=NoMoreSpam=net
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Viewed:
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7956 times
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Matthias Jetleb wrote:
>
> I'd suggest that you try this again mid-summer. The solar radiation
> angle is still fairly low at this time of year with much of the energy
> being scattered by the atmosphere as well as being spread over a
> larger surface area of the earth. I have observed a significant
> difference in the charge time of my solar-powered car as the seasons
> pass. The peak charge will come in mid-June. Let us know what the
> output of the cell is when the radiation angle is at it's maximum (or
> close to it - June 20)
>
> Matthias Jetleb
> VA3-MWJ
Well, I could certainly create an artificial environment which would
increase the solar cell's output without the need for scheduling another
test on the summer solstice, if you were merely curious as to its
maximum output based on the cell's physical properties. The vernal
equinox was a couple days ago, which makes my test fairly indicative of
an average performance level for the solar cell in direct sunlight. My
latitude is also fairly average, at about 36.5 degrees north. The
measurement was taken about 3:00 PM local time. Yes, I could take more
measurements this summer, but the data wouldn't be very useful except
for people living around 36 degrees north in June; there's simply too
many variables when dealing with sunlight. I was just trying to give
some idea as to what you can expect from the solar cell.
Here's some more useful information: the solar cell ceases to power a
5225 (71427) 9V motor under *no* load at about 1' from a 100W
incandescent lightbulb, a light source available to anyone with
electricity. At this distance, the solar cell puts out about 3.4V, 10mA.
--
Regards
Micah J. Mabelitini - LUGNET #918
accutron@kih.net
BrickDreams - http://www.users.kih.net/~micahx/brickdreams/
RCXbug - http://www.users.kih.net/~micahx/rcxbug/
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Message has 2 Replies:
 | | Re: Solar Cell Output in Direct Sunlight
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| (...) I agree - and another factor is the angle of the panel to the incident light. The amount of light varies as the cosine of the angle of the sun to a line thats perpendicular to the panel. Building some kind of a mechanism that tilts the panel (...) (23 years ago, 25-Mar-01, to lugnet.robotics)
| | | Re: Solar Cell Output in Direct Sunlight
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| I have a Halogen uplight lighting a room and my solar cell will power a motor, with no load up to a distance of around '6 (3' work height) from the light pole. This will fluctuate according to the reflectance's of the ceiling, walls, etc. Rose (...) (23 years ago, 6-Apr-01, to lugnet.robotics, lugnet.dacta)
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Message is in Reply To:
| | Re: Solar Cell Output in Direct Sunlight
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| (...) I'd suggest that you try this again mid-summer. The solar radiation angle is still fairly low at this time of year with much of the energy being scattered by the atmosphere as well as being spread over a larger surface area of the earth. I (...) (23 years ago, 25-Mar-01, to lugnet.robotics, lugnet.dacta)
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