Patent ID: 7501046

Claim:
In a solar distillation loop apparatus comprising an evaporation section, solar powered fans, and a condensation section, the evaporation section having a first pipe section disposed on a ground surface, the first pipe section including a substantially straight portion and elevated portions on each end of the substantially straight portion, an impure water inflow coupling at one end of the straight portion and an impure water outflow coupling at the other end of the straight portion, the solar powered fans disposed in each of the elevated portions of the first pipe section, and the condensation section having a second pipe section disposed under the ground surface beneath the first pipe, section and two substantially vertical pipe sections that connect respective ends of the second pipe section to respective ends of the first pipe section, wherein solar energy heats the substantially straight portion to evaporate impure water therein, the improvement comprising: a sleeve having a tubular shape with open ends and a diameter less than a diameter of the first pipe section, disposed within the first pipe section between the solar powered fans and rotationally attached to the first pipe section, for increasing an evaporation surface area of the evaporation section.