[Its.an.education.project] Fwd: Energy alternatives (comes from ''Ivan's latest blog entry on OLPC'')

[Chris Leonard]

I should clarify that I think insolation is "sun-light falling", you'll
probably need to adjust for for the conversion efficiency of your
photovoltaics.

If anyone has a membersip in the American Society of Mechanical Engineers or
access to the Journal of Solar Energy Engineering, this article might be of
interest:

Global Surface Solar Energy Anomalies Including El Niño and La Niña Years
http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO000123000003000211000001&idtype=cvips&gifs=yes

Weather anomalies that increase clouds influence the reliability of both
renewable energy and building environmental-control systems. Non-grid solar
power systems may run out of capacity for such items as communications
electronics, flood-warning stream gages, refrigerators, and small village
power systems. This paper provides 1×1-degree resolution global maps that
identify those regions which experienced large abnormal solar energy during
a 10-year period. A source is identified where specific values for maximum
year-to-year variability can be obtained in regions where ground-site
measurements do not exist. The information may aid in the selection of safety
factors for solar power systems.
---------- Forwarded message ----------
From: Chris Leonard <cjlhomeaddress at gmail.com>
Date: Mon, May 19, 2008 at 2:33 AM
Subject: [Its.an.education.project] Energy alternatives (comes from ''Ivan's
latest blog entry on OLPC'')
To: Its.an.education.project at tema.lo-res.org


This site may have useful data on solar potential with finer
granularity/resoultion.

http://www.gaisma.com/en/dir/pe-country.html

They claim to derive their data from here:  http://eosweb.larc.nasa.gov/

The term you need to search on is "insolation" (more-or-less a measure
of solar energy potential). The map linked in the earlier message is found
reused by many solar sites, but has limited utility given it's low rez.

cjl

++++++++++++++++++++++++++++++++++++++++++++

the solar maps that have been indicated just show the "what should be"
situation according to the place that the countries have in the globe.

Peru has a different climate (we should be an almost equatorial country!
full of sun!) due to the Humboldt current and the presence of the 2nd
highest chain of mountains in the word: the Andes Mountain Chain.

Regards,

Javier Rodriguez
Lima, Peru

Edward Cherlin wrote:
>* On Sat, May 17, 2008 at 12:22 AM,  <forster at ozonline.com.au<http://lists.lo-res.org/mailman/listinfo/its.an.education.project>>
wrote:
*>*
*>>>* In Peru, my country, there is rain 5 months by year, totally cloudy,
day
*>>>* after day.  Just 2 or 3 hours with some sun.  So, according to the
*>>>* manufacturers, all solar panels can just provide from 5% to 20% of its
*>>>* normal capacity (normal capacity is got in a full sunny day).
*>>>*
*>>* See http://www.oksolar.com/abctech/solar-radiation.htm
*>>* Peru doesnt look too bad in its worst month
*>>*
*>*
*>* It's suggestive, but we need to see the methodology and the source
*>* data. It's too easy to mislead with pictures of statistics.
*>*
*>*
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tema.lo-res.org<http://lists.lo-res.org/mailman/listinfo/its.an.education.project>
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