I just stumbled across this: http://austin.craigslist.org/rvs/3352847731.html
Video here for future reference when that ad expires: http://www.youtube.com/watch?v=38jKyn9jo7c (note the smaller model running off of two solar panels)
More options here: http://www.ebay.com/sch/i.html?_nkw=atmospheric+water+generator&_frs=1
This might make it possible to never again have to refill our Rialta's tiny fresh water tanks. Most claim to produce 5-7 gallons of water/day!
Tynan, what's the status on your propane water heater?
Whoa... this is possibly a revolution for showering. I never installed the propane water heater, but I still have it.
After looking at this some more after we talked about it, I'm kinda "meh" on it. The video's kind of goofy, calling it 'revolutionary' - it's just a dehumidifier with a UV and charcoal water filter bolted on. For $800!
Just buy a normal, large dehumidifier, another of the 3-stage water filters we're already using, and another cheap sump pump; have the sump pump push water through the filter every time the reservoir gets above some line and run the filter line straight into the fresh tank. I bet you could do all that for like $300, and it's a trivial installation.
The bigger problem is, that's a lot of electricity. My situation is a bit tricky right now because in Seattle, the time of year when humidity is an issue is also the time the days are short and dark.
Right now there are days, multiple days in a row where I get maybe 12ah total back in the batteries during the day - we may only have ~6 hours of what you could call "light" and the panels are running at basically 4% of max wattage. Yeah, it gets really really gray here. That's 5% of my batteries refilling, and even trying to be extremely conservative I use ~20% a day, just running the fridge and vent fan to keep the humidity from decimating me.
You noted there's a ~80W version of this you found that does 1 gal a day, but that's 160ah a day at 12V, which is 62% of my battery capacity (258ah total) every day. And a gallon of water a day is already a relatively spartan shower. If I ran it for 25% of that time I'd get a quart of water a day (or a bit less since it takes a while to get going) for 16% of my battery capacity daily, which I still can't afford right now, not even close.
I think this may make a lot of sense if you have shore power. But that's a big 'if' - if I had shore power essentially all my constraints would vanish.
And even then, it's still just a dehumidifier run through a Brita filter... you can do this for cheap, and much more compact.
Pretty gnarly - do they have packets of 'minerals' you can put into water? I haven't looked into this much at all but I hear here and there that if you drink enough distilled water that it's bad for you as it doesn't contain the trace minerals the body needs. Maybe a small pinch of himilayan sea salt would do it?
First, a couple blog notes. I haven't been posting as much because my free time has been filled with writing my new book. More info and the cover are in the forums. Also, lots of people have been linking to me recently. I really appreciate it!
For those who don't know, waterboarding is a controversial subject these days. It's an torture method which is used to interrogate suspects and designed to simulate drowning. Supposedly it's so bad that the average marine can only handle it for 15 seconds.
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