Simulation on Heat and Mass Transfer of an Evaporator as Evaporation Chamber In Natural Vacuum Solar Desalination System

Natural Vacuum Solar Desalination technology was designed and built for one of solutions for water scarcity issues right now. An evaporator as the main part of this system should be analyzed to achieve a good result (fresh water productivity). The evaporator is used as an evaporation chamber to evaporate seawater which will be condensed to water storage. The commercial code CFD ANSYS Fluent 16.1 has been used to simulated and analyzed of heat and mass transfer inside the evaporator. There is no laminar model was used in this work with the temperature of heating coil was 70°C and the operation pressure was under atmospherical pressure. In this work, the results of simulation and experimental will be compared to be a validation. The highest temperature 72°C was in heating coil and the lowest temperature 38°C was in a body of evaporator based on the simulation result. The temperature of heating coil was increasing during evaporation processes. From these comparisons, shows there's a little discrepancy with a magnitude of error between 0,02% to 33%. It also shows the method has been used is right for analyzed and simulated about evaporation-condensation processes.