Jerry's Blog  1.4.310
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Solar Panel Page
Web page for solar panel
Mon June 6 2022  8:07pmMisc.

Have been implementing the ideas in the previous article. That is to say, have built a 'girasol' support for the solar panel so that it can face the sun at various times of day and seasons of the year, for greater efficiency.

Rather than detailing this in a lengthy blog article, the girasol's development has its own web page . That web page lacks reader feedback, so reader comments can be posted to this blog article (if your browser allows javascript).

 
Solar Panel Efficiency
Optimizing the output of my solar panel
Sat December 18 2021  7:26pmMisc.


sine = efficiency
You remember, of course, all the trigonometry you learned in school, and its practical applications to daily life. Well, here's another example:

The solar panel is at its peak efficiency when directly facing the sun: that is, when the panel is perpendicular to the rays from the sun. This corresponds to the sine value of 1.0 for a 90° angle, as the graph illustrates. When the panel is parallel to the rays of the sun (0°), or away from the sun, the efficiency drops off to practically nothing. At angles between these two extremes, the maximum relative efficiency changes as a sine function of the angle. For example, sin(65)=.9063, so at an angle of 65° the maximum potential efficiency of the panel will be a bit more than 90%.

The practical importance is that I can expect to harvest more of the sun's light if I can keep my panel facing the sun, like a sunflower. It needn't be exactly 90°; anything close to the top curvature in the graph will be fine. The aforementioned 65° sounds like a reasonable goal. If my panel never strays more than 25° in any direction from the sun, that gives me 50 total degrees of tolerance for inexactitude, while still attaining 90% efficiency or better.

Now, this is fun math, but only as an approximation or a hypothetical ideal. Even on a sunny cloudless day, earth's atmosphere diffuses a certain percentage of the sun's light, so that light is coming from all directions, not just from the point of the sun. Were it not so, our sky would be completely black, as in outer space. So the efficiency is not 100% at 90°, and is not zero at 0°. On overcast or rainy days (LOTS of those in Nicaragua), the diffusion is even greater and the efficiency curve much flatter. Nevertheless, this seems to be an idea worth pursuing. I hope to follow with another blog article or two, in trying to implement the above to improve my solar panel system.

 
Solar Panel
Harvesting the sun for my house
Sat January 30 2021  11:43amMisc.


solar panel

Have recently purchased and installed a solar panel with its various components. Not motivated primarily by ecological nor economic concerns. The grid for large areas of Nicaragua gets its power from a well engineered and environmentally friendly hydroelectric dam just north of Jinotega. My monthly light bill is typically between $U10 and 15 for around 80 to 100 kilowatt hours of energy consumption. But Disnorte is poorly administered and unreliable. Besides, I like the idea of being a bit more independent. Call it a learning experience, if nothing else, and a possible hedge against future needs.

This initial modest experiment isn't (read article)

  2 comments
rev. Feb 12 2021  8:31pm
 
DePyper
Honoring the name my father gave me
Thu October 24 2019  4:33pmMisc.

Am planning some small website changes soon, but first want to publicly clarify another matter that is of great personal import and may also have a slight impact on the planned website changes.

My family name is DePyper, a compound, two-part surname of Belgian origin. Am not sure of the etymology; it may originally have meant something like 'the piper', as in the village flute player, or, more likely, 'of (the town of) Pyper'. Either way, 'Pyper' was the important part, and 'De' (or 'de') merely the prefix.

I grew up learning to write my family name as DePyper, but also to recognize and accept De Pyper and de Pyper (read article)

  1 comment
rev. Nov 26 2019  6:40pm
 
Unrest in Nicaragua
The crisis in Nicaragua: A foreigner's viewpoint
Wed July 4 2018  3:23pmMisc.

It started out in April as a peaceful protest of Daniel Ortega's proposal to cut social security benefits, and of his tyrannical repression of dissent. So say the news reports. But from the beginning it has involved looting, burning, and extracting 'donations' from motorists who want to pass through. And when Ortega quickly renounced his social security proposals, the protests only intensified. For a couple months now these 'peaceful' demonstrations have been occupying marketplaces and interfering with transportation (including transportation to and from the hospital). Many of the youth manning the roadblocks are recognized as local thieves and loafers, no job, no schooling, still living (read article)

  7 comments
rev. Dec 4 2018  10:48am
I have not failed, I've just found 10,000 ways that won't work
- Thomas Edison

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6/6/22Solar Panel Page
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10/24/19DePyper 1
7/4/18Unrest in Nicaragua 7
Copyright (c) 2017-2022 Gerald DePyper - Jinotega, Nicaragua, C.A.
rev. 2022.01.26