On Mon, 10 Sep 2007 23:47:13 -0700, "
wrote:

On Sep 10, 6:23 pm, Larry wrote:
" wrote groups.com:

but if capturing the BTUs is the most important
issue then why use an inefficient desalination system like steam
distilling?

Because boiling seawater into steam from the waste heat off an engine is
about as simple a thing to do as you can get. To make an RO run off waste
heat, you have to convert it to PRESSURE, probably to electricity to run
the RO's pump and computer, right? I want to simply boil seawater into
steam in heat exchangers running off hot exhaust gasses and engine
coolant....making distilled water for NOTHING in fuel and very little in
maintenance. ...


Simple is good. I wish you well with it.

Just so you know, RO doesn't need electricity any more than steam
does. You just need to push water through a membrane. My Spectra
system has only one electrical component and that's an off the shelf
pressure water pump. It has no electronics.

The lifeboat model has a hand pump. It is a filter and that is all it
is.

They used to sell stills that use engine heat, but I guess RO killed
them off.

Casady