Patent ID: 7597785

Claim:
The method of replenishing a body of fresh water with distillate of water vapor derived from a body of source water to be purified, comprising: spraying source water from the body of source water into a first chamber elevated above the body of source water and connected by a first conduit, filled with water, extending from the bottom of the first chamber into the body of source water to maintain a subatmospheric pressure in the first chamber to vaporize the source water spray; feeding the resulting vapor into a second chamber elevated above the body of fresh water and connected by a second conduit, filled with water, extending from the bottom of the second chamber into the body of fresh water to maintain a subatmospheric pressure in the second chamber; and spraying fresh water from the body of fresh water into the second chamber to condense the fed vapor so that the condensed vapor flows through the second conduit to the body of fresh water.