摘要：this study presents theoretical considerations and results of a portable shell and tube heat exchanger in a solar water distiller system. the device is composed of a glass heat exchanger, which served as a condenser for vapor condensing which were produced in black paint.s.lar absorber. It was also composed of a tank for water source and a tank for produced distilled water. shell and tube was designed and simulated using an implicit numerical scheme. simulation results showed that accumulated mass water greatly depended on the inlet vapor temperature and volume, heat exchanger material, coolant water temperature and volume. thus, changing the material from stainless steel to glass in the same condition (vapor temperature, vapor volume, coolant temperature and coolant volume). these inexpensive shell and tube heat exchangers permitted to produce 40 litre/day, distilled water from vapor with 378 K inlet temperature in atmosphere pressure. If inlet pressure increases, vapor temperature will decline and thereupon, heat exchanger’s efficiency tangibility will increase.