I just dropped the price of
the permaculture playing cards
for a wee bit.

 

 

uses include:
- infecting brains with permaculture
- convincing folks that you are not crazy
- gift giving obligations
- stocking stuffer
- gambling distraction
- an hour or two of reading
- find the needle
- find the 26 hidden names

clickity-click-click

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solar heater + RMH style bench?? possible idea use for husp friendly cooking?  RSS feed

 
kadence blevins
Posts: 602
Location: SE Ohio
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So i am not so tech-savvy and prefer simple and non-wiring stuff so this neat solar heater idea caught my eye a few years ago. You build basically a shallow box, fill it with rows of empty soda cans (hole stabbed through the bottom), leave some room top and bottom, paint the whole thing black inside, top it with plexiglass. Theres a hole in the bottom corner for cool air intake and a hole at the top opposite corner for hot air to go out. ((Example pic: http://i.kinja-img.com/gawker-media/image/upload/s--ehiTwkdH--/c_fit,fl_progressive,q_80,w_320/18ixw6yrvd8wojpg.jpg ))
Now what i most always see it used for was house heating. Pulls the air from outside, pulls it in and thru the cans and heats it, thru a pipe into the house.
Of course heating the air isnt that efficient... plus "gick"y heated paint air coming from the box. Not so nice. Although i am sure someone with more knowhow in this space has ideas for the same thing but less "gick".

But my idea i got the other day is to take this idea, using the recycled soda cans and all, but you take the hot air pipe and put it through the wall into a RMH style bench. Then the air doesnt pipe into the house, its in the pipe in the bench, thus heating the bench without bringing the gick in for you to breath. Then the pipe goes through the bench and instead of venting it outside you pipe it back into the solar box at the bottom cold air intake hole. The air heating and cooling should, in my theory, keep the air circulating.

And like they did at the lab with the RMH and installing the guillatine (sp??) At the intake where the hot air goes into the bench. So when you dont want it to heat up more or not have the air flow and possibly lose mass heat you just close the guillatine.

I have a doodle i penciled up that i can try to post but i hope someone can tell me if this is plausably a good idea or not. And maybe this will catch the interest of someone with sometime on their hands and knows how to do that computer graphic draw thing... ya i dunno what its called but the blueprint pic kind of thing. Lol i said i am not so tech savvy!

I was thinking if this was plausable then someone could mess with ideas of how to turn it into a husp friendly heating idea. For heating home or cooking. I can see how having several boxes piped to some sort of oven would be super cool for cooking!

Cant wait for some feedback (:
 
Julia Winter
steward
Posts: 2142
Location: Moved from south central WI to Portland, OR
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What if you blackened the cans by holding them over a sooty fire? It would rub off, so you'd have to be clever to load them into the glass box without losing their coating.
 
kadence blevins
Posts: 602
Location: SE Ohio
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books goat hugelkultur rabbit tiny house wofati
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Hmm.. perhaps something like charcoals + pine tar or bone sauce? Carefully painted on it? I dont know how that would hold up to being heated though. I cant find an average temp for how high it would get inside it but read people gettin 300+ *F out of it so pretty hot. Plus different sized ones would be different temps i would guess.
 
Connor Macreno
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I remember seeing a blog post comparing solar heater designs. Screen type heaters outperformed can and pipe types. Just a box with a glazed front, black back, and several layers of black screen stapled to the sides and spaced out enough not to touch each other.

For a thermosiphon to work well you will need the collector to be lower than the thermal mass you're heating.
 
Connor Macreno
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Add something like this to the system and you can store some off the energy from midday and release it at night. Just needs the pellets, a mister, and a path for water to drain out of the system.
 
Connor Macreno
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Disappearing link...

I had put in a link to an article about zeolite heat storage.
 
The glass is neither half full or half empty. It is too big. But this tiny ad is just right:
Permaculture Playing Cards by Paul Wheaton and Alexander Ojeda
https://permies.com/wiki/57503/digital-market/digital-market/Permaculture-Playing-Cards-Paul-Wheaton
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