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Getting more from solar PV on Cloudy days?

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Posted by spaco on January 4, 2008, 8:54 pm
 
Two questions:

This link takes you to patent info on a device used along with a 2 axis
tracking system that lays the panel horizontal when it is cloudy.  They
claim one can get 30% to 80% more energy on a cloudy day.   Knowing how
little I get on a cloudy day, 30 to 80 % of just a little is still "just
a little more", but am I missing an important point?

1.   Does anyone know if there's anything to this or not?


http://www.freepatentsonline.com/20070084502.html

If you take this link, scroll down to the 2nd paragraph of "Summary of
Invention".  That's where they explain what the claim to have done in,
more or less, understandable terms.

2. They mostly talk about using solar PV for hydrogen generation.   I'm
sure I can generate  a little hyrdrogen, even more using some high tech
pulsed DC, but:

Are there any practical ways to store it at home?

   Seems to me that you'd have to have either some HUGE storage tanks
and low pressure compressor (about 250 psi) or you'd have to have some
REAL HIGH pressure tanks (like 5000 psi) and a compressor to match.  I
have heard of metal hydride storage, etc, but I don't think its here
yet, at least not for the homeowner.

Pete Stanaitis
--------------------------------------------

Posted by wmbjkREMOVE on January 5, 2008, 12:47 am
 
wrote:


A typical light-sensitive controller seems to do this automatically.
On cloudy days I've occasionally seen my 2-axis tracker near
horizontal.


It's not practical for the average person to generate it or store it.
Not impossible though, here are some posts from somebody doing it, but
he's about as far from average as you can get.  :-)
http://tech.groups.yahoo.com/group/awea-wind-home/message/4406
http://tech.groups.yahoo.com/group/awea-wind-home/message/4455
http://tech.groups.yahoo.com/group/awea-wind-home/message/4418
http://tech.groups.yahoo.com/group/awea-wind-home/message/4410

And here's a post which describes why we won't be hearing any more
about the project
http://tech.groups.yahoo.com/group/awea-wind-home/message/4425 . Note
the term "geninus in residence".

Wayne

Posted by spaco on January 5, 2008, 6:07 am
 Thank you for taking the time to respond.  The links were very
interesting.   I can understand the writer's unhappiness about getting
"flamed" for his ideas.    I guy on this group just called me stupid for
not rushing out to buy a 2 axis tracking system for my 45 watt panel.

The link about his Taylorcraft sure makes me wonder how he stores enough
low pressure hydrogen to stay airborne for long.

Pete Stanaitis
---------------------

wmbjkREMOVE@citlink.net wrote:


Posted by Solar Flare on January 5, 2008, 10:33 pm
 You just thanked the guy that calls everybody stupid for
anything....LOL

Just watch.



Posted by wmbjkREMOVE on January 6, 2008, 1:55 pm
 wrote:


There'd be a lot more good info on Usenet if the can't-do types would
find something useful to do with their time.


He pressurizes it. Quote from the 4455 post -

*************
"The hydrogen is (can be made) portable. I have NOT
discussed, in any detail, the process of compressing
Hydrogen to extreemly high pressures for use in land
and air vehicles. This is not because the information
is secret, this is because a mistake could blow one to
kingdom come - along with all the loved ones, and a
large percentage of one's property.

I do this work at my own risk. I have been doing it
for twelve years. I know what I am doing - and I am
careful. The up side is: I don't buy gasoline any
more. (and I won't need gasoline in any future crisis)
I will show close friends how to do it, But I'm not
going to publish (on the net) a recipe for
catastrophic self destruction by the un-initated &
technically challanged."
*************

Wayne


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