Development of Simple Solar Water Distiller

  • Nureesan Doloh Songkhla Rajabhat University
  • Wattana Dechana Songkhla Rajabhat University
  • Muranee Daoh Songkhla Rajabhat University
  • Purintorn Chanlert Songkhla Rajabhat University
Keywords: solar water distiller, distillation efficiency, water pH


The objective of this research is to design and build a solar water distiller with high efficiency. The results showed that the maximum water volume is 370.83 ml/hr m2 at the average solar radiation intensity of 506.9 W/m2 with the highest environmental temperature is 35 °C, and the highest average internal temperature of the distiller is 57.8 °C. The minimum water volume is at 175 ml/hr m2 at the maximum average solar radiation intensity of 258.1 W/m2 with the lowest average environmental temperature is 31.4 °C, and the average internal temperature of the distiller is 43.4 °C. The average pH value of distilled water refined from sea water is 6.5 while water distilled from drainage ditch demonstrate the pH value of 7.23 following TIS (Thai Industrial Standard) 19 - 2517 standard where pH of the distilled water must be in the range of 6.5 to 7.5. Our solar water distiller has an average efficiency of 32.96 % compared with the average efficiency of 25 % of condenser-less solar water distiller.