Posted by frigitar on March 27, 2009, 8:33 am
Wow this is a very nice application of renewables that I'd not heard
of. Its good to know of efficient 12V heating systems... again I have
no idea about these.
As for how many batteries you need, well, I guess you should first
calculate the amount of light/heat/ventil you need per day on average
(even a rough figure)
Your choice of panel might well be based on the outcome of these
calculations (cost, power reqd. etc)
And yeah go for solar electric heating..... you can always install a
gas system but wheres the fun in that? :D
Posted by Eeyore on March 27, 2009, 8:22 pm
That would be nuts. Solar *thermal* is FAR more effective.
Posted by frigitar on March 28, 2009, 12:04 pm
Sorry to disappoint you but solar thermal wont work in the cold
climates that are in question. And apart from the temperature, the
irradiation profile is not suitable either. Thermal needs lots of beam
radiation but these northern parts of the world see primarily diffused
Also in your earlier posts you talk about large scale solar thermal...
surely you must see how that is of absolutely no use to him where he
has a "small" chicken coup and one which keeps travelling around!
He needs to power his shed not his country.
Posted by Eeyore on March 28, 2009, 6:21 pm
Use the vacuum insulated variety. Which climates are you talking of anyway
Where do you get that idea from ? Incident light energy is energy,
whatever form you care to call it.
I suggest you see what Spain is doing with solar thermal for power
Even so "The energy produced by this plant is three times more expensive
than that produced by coal and gas power plants, which seems like a
bargain to me." Yes, only 'treehuggers could think a price increase of 3
times is a bargain.
That's why direct solar thermal heating of water comes out better.
Posted by Randy on March 28, 2009, 8:14 pm
Maybe a system like this only scaled down?
Just a suggestion
Randy from Nebraska