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Sunn Sceptre
Question:
I’m looking for a schematic for a 1970 Sunn Sceptre. I’ve checked all the obvious sources and although there are plenty of Sceptre schematics out there, they are all the same…. and all of the late ’60s model, which is slightly different. The most notable visual difference in the 1970 model [...]
polyiso vs styrofoam
Question:
I’ve been looking for 1" foil faced polyiso at the usual suspects (Home Despot and Lowes) and do not seem to find it. I do find 1" foil faced styrofoam and thinner polyiso without the foil. Perhaps these are temporary shortages??? It seems that polyiso has about a 40% [...]
Circulators for solar hw
Question:
Hi folks. I have inherited some solar hw panels and am setting them up. Panels are mounted and tank in place, need to run pipe and make the connections next. I have been researching pumps for a while. In my installation I will have 22-23 feet (approx 7m) of static head. This [...]
trickle collector idea.
Question:
>I was thinking fairly thin piece of copper. I was hoping that copper >oxide was a good absorber and poor emitier. I could use a copper >header and footer without a reaction of the other metals. I liked >copper because of heat transfer, but aluminum would probably be just fine. [...]
What Joining "The Green Party For Nuclear Power" Does For You.
Question:
25. Brandon K. Montoya Oct 21, 9:46 pm Yes I agree. I am very disillusioned with the Democratic Party as you have attested to. This is no secret, I never claimed to be a card carrying member of the green party. The green partys national charter says that any candidate [...]
Solar pond and imitation Big Fin water heaters
Question:
>I was told "…your shift is over when tank three hits 40C…" . >Faster flow was NOT better in that case .
A faster fluid velocity always increases the heat transfer rate, since the boundary layer between the fluid and the pipe wall is thinner, with more conductance. That’s [...]
pex vs copper
Question:
What are the thermal properties of PEX compared to copper? I understand that they use PEX in heated floors now, so it must transfer heat relatively well. I want to run the pipe to and from the solar collector through PEX with some insulation around it where it will be exposed [...]
Parabolic concentrators somewhere?
Question:
Dear solar enthusiasts, I am studying solar power and Brayton cycles with a parabolic concentrators. I would like to buy a 2- or 3-meter diameter parabolic dish and start detailing the receiver. Is there anyone who knows where I can get such a dish? I tried Google but there wasn’t able [...]
what coating to use on DIY flat panel collector?
Question:
Commercially available flat panel collectors use a special selective coating to increase their efficiency. I’m looking for suggestions for the best type of coating to apply to a metal panel in order to make a very economical flat panel collector. It’s going to be used to heat water for an outdoor [...]
EarthToys Alternative Energy Emagazine
Question:
We’re supposed to believe that "Earthtoys" is a serious journal? Get real, get a serious name! Tom Willmon near Mountainair, (mid) New Mexico, USA What me worry? – A.E.Newman Net-Tamer V 1.12.0 – Registered
Response:
EarthToys Alternative Energy Resource Library and Emagazine February 2005 Newsletter February Emagazine – Articles about [...]