[Greenbuilding] [BULK] Solar thermal with sand storage

[Speireag Alden]

On 2008, Jan 28, at 12:40, Morgan McDonald wrote:

> Thanks for the idea, Speireag.
>
> Only problem is that we don't want moisture in the warm sand  
> because it
> may lead to bacteria growth (stinky and possibly unhealthy for  
> humans).

     Understood, but I'm not advocating a slow drip out of a line.   
The supply of water would be finite, and the bottles would be  
designed not to leak.  Since the sand would pretty much always be  
warmer than the ambient temperature, and sometimes considerably  
warmer, I would not be worried about bacteria.

     I was just pointing out that in the event of a bottle failure,  
the system would not fail catastrophically.  In fact, the operator  
would probably never be aware that the bottle was leaking.

     I think I'd set the bottles cap-upward, since the most likely  
failure point is probably where the cap seals to the neck of the bottle.

-Speireag.