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Re: Trombe wall efficiency



In article <3s67bb$ffa@vu-vlsi.ee.vill.edu>, nick@vu-vlsi.ee.vill.edu
(Nick Pine) wrote:

> Nick Pine <nick@vu-vlsi.ee.vill.edu> wrote:
> 
> Here's a small picture, a view from the East, say:
> 
> ---------------       ^
> 132F <=O= <|   |      up        32F                    311 Btu/hr/ft^2
>        |  <| ^ |                                 < --- Sun
>    |   | ^<|   |<-Polycarbonate plastic
>    |   |  <| ^ |
>  house | ^<|<--|--80% shadecloth
>   16'  z   z   z i                          South
>        |  <| ^ |
>    |   |<--|---|--Original house wall                  (clear enough? :-)
>        | _<| ^ |
>  68F ==I====>  |
> -------------------------------------------
>        |  3"   |
>  
> Nick

Wouldn't black painted metal be better than shadecloth at absorbing heat
and radiating the heat absorbed?

I've built a unit several years ago with painted beverage cans with mild
success.  I think that a large heat sink (made from scrap sheet metal)
would be most effective.

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