Numerical simulation of heat exchanger inside the single solar still with PTC

Water is necessary for human survival, individuals consume 20 to 50 liters of safe drinking water each day drinking, cooking, and other household activities. Contaminated not only unsanitary, but also dangerous one's health. The main aim this study improve the productivity solar desalination by selecting best still design. design single selected a simulation was made in COMSOL 5.5 program use two designs heat exchanger, one which winding evaporater (absorber plate pipes). As well as productivity. Using exchanger inside second type we will get highest temperatures from exchanger. temperature about 92.53⁰C inner glass surface 79.651⁰C at 2:00pm, higher than 86.78⁰C 72.472⁰C, respectively. Also, distilled when using first reaching 5.35017 Kg/m2 hr during day. While an 4.5 hr.