I don't know about the killing bugs part, but you can't achieve low humidity with a standard cooling dehumidifier. You're limited in dew point by the temperature of the dehumidifier, which can't be below freezing otherwise you'd have a block of ice on the condenser. Lower than that requires a desiccant dehumidifier.
Self-filling bottle converts humid air into drinkable water
- Thread starter Plazma Inferno!
- Start date
All I can say is that the Canadian device was said to dry the air in an unsealed house enough to damage human skin after sufficient exposure, so I figured it would be interesting to see how reliably it could kill bugs over a week or a month in a fully sealed environment.
Waiter_2001
Registered Senior Member
Please do not post nonsense to the Science subforums.
The article writes "H2O." I thought it was 1H2o4. If there are three molecules, EVERY combination is 3^3
i.e.:
123
132
213
231
312
321
...18 of them; 3*3*3. 4 would be 4*4*4*4.
i.e.:
123
132
213
231
312
321
...18 of them; 3*3*3. 4 would be 4*4*4*4.
Fraggle Rocker
Staff member
I read about something similar four or five years ago. It was called (in English) a "solar still." It was designed for people in the Third World who have very little reliable access to clean water but are surrounded by dirty water (open sewers, polluted streams, etc.) AND have high ambient temperatures.
You fill the bottom section with any kind of water (even urine or other waste) and let it sit. The sun causes evaporation, and the water vapor is pushed into a second section (which of course needs to be cleaned regularly) where it is collected. It was advertised as able to collect one liter of drinkable water per day in the average Third World climate zone.
It could be manufactured at the cost of $5, and probably cheaper as production ramped up. Add the cost of shipping, and still some billionaire philanthropist like Bill Gates or George Soros could deliver one to every human being in the world's poverty belt. I'm surprised that this isn't already happening. I suppose the despotic leaders of the Third World countries block all efforts to raise the living standards of their population, because then the next thing you know they'd be going to school and learn how to overthrow a despot.
There's a similar success story for vision problems. Road accidents are the leading cause of death in many Third World countries because nobody can afford to buy eyeglasses. A new technology creates lenses that are filled with oil. The space inside can be re-shaped to provide the correction each person needs. It comes with instructions (obviously someone in the community has to be able to read
) for turning the knobs and determining if a turn makes the patient's vision better or worse. Within about 15 minutes, most patients will have correction that brings them very close to 20:20. These cost about $15 to manufacture and shipping costs will be even lower than the much bulkier solar still. Again, I don't understand why they haven't caught on.
Oh wait, there's that phrase "despotic governments" again. It's a whole lot easier to run roughshod over a population if they can't read.
You fill the bottom section with any kind of water (even urine or other waste) and let it sit. The sun causes evaporation, and the water vapor is pushed into a second section (which of course needs to be cleaned regularly) where it is collected. It was advertised as able to collect one liter of drinkable water per day in the average Third World climate zone.
It could be manufactured at the cost of $5, and probably cheaper as production ramped up. Add the cost of shipping, and still some billionaire philanthropist like Bill Gates or George Soros could deliver one to every human being in the world's poverty belt. I'm surprised that this isn't already happening. I suppose the despotic leaders of the Third World countries block all efforts to raise the living standards of their population, because then the next thing you know they'd be going to school and learn how to overthrow a despot.
There's a similar success story for vision problems. Road accidents are the leading cause of death in many Third World countries because nobody can afford to buy eyeglasses. A new technology creates lenses that are filled with oil. The space inside can be re-shaped to provide the correction each person needs. It comes with instructions (obviously someone in the community has to be able to read
) for turning the knobs and determining if a turn makes the patient's vision better or worse. Within about 15 minutes, most patients will have correction that brings them very close to 20:20. These cost about $15 to manufacture and shipping costs will be even lower than the much bulkier solar still. Again, I don't understand why they haven't caught on.Oh wait, there's that phrase "despotic governments" again. It's a whole lot easier to run roughshod over a population if they can't read.
I'd be interested to see how it actually works, if you have a link.
I'm not sure if someone made a commercial product out of it, but the classic solar still is just a plastic sheet, a rock and a can to collect the water in:
http://www.desertusa.com/desert-people/water-solar-still.html
Waiter_2001
Registered Senior Member
Out of BOTH HYDROGEN AND OXYGEN I would choose ONLY ONE since they BOTH exist in the natural world as a natural gas...
Given that this is true I would select EITHER.
Given that this is true I would select EITHER.
