Is it possible to build a vacuum water distillation system. how?
Water boils at 100°C (212°F) at sea level, and drops several degrees at 2000 (6000 ft) meters elevation. As the air pressure drops, boiling point gets lower and lower. At 0.25 psi (1/60 of a bar), water boils at room temp. This is easy for a vacuum pump to do, but the water vapor (gas) goes through the pump, so it needs to be clean and corrosion resistant. Once the water vapor goes through the pump back to atmospheric pressure, the water vapor condenses back to water again. You could make any capacity you want, unfortunately, this is a fairly expensive and inefficient way to make water. The principle is commonly used to dry water from inside pipelines, but I don’t know of any other use for it.
