▎ 摘　　要

NOVELTY - Fresh water production is increased by phase change material (PCM) with oil heat exchanger. Important factors which effect the distilled water production are water depth, wind intensity, solar radiation, mass flow rate, difference between water and glass temperature, glass cover inclination. Using flake graphite nonoparticles, PCM and film cooling, productivity can be increased and fresh water production can be increase by increasing flow rate of mass of 0.001-0.01 kg/second. Copper oxide, titanium dioxide and graphene oxide are the nanoparticles and can be used with phase change materials to enhance the pure water productivity and daily productivity has been enhanced by 56% with the use of phase change materials. USE - Used as fresh water production. ADVANTAGE - The water production: utilizes flake graphite nonoparticles, PCM and film cooling, which increased productivity; can be increase by increasing flow rate of mass of 0.001-0.01 kg/second; utilizes double-basin single-slope cascade solar which is still an appropriate and cost-effective design for household use.