چكيده به لاتين
In this research, whith the purpose of finding a solution for providing desalinated water in places near the southern waters of country and far from the big cities, two approaches of desalination of sea water by using liquid-gas ejector and solar energy are proposed. Persian Gulf countires provide most of their water needs by thermal desalination processes, however, most these plants have to be built near the power plants to receive energy. As a result, these approaches are not quit economically justified for low populated places that are far from big cities. In this research, with the purpose of emiting the need for power plants and steam, using the solar energy and liquid-gas ejector in Bandar-Abas city as a case study, has been suggested. The feed water temperature would be rised in the solar collectors and then the evaporation process would begin. Using liquid-gas ejector would reduce the evaporation chamber’s pressure, therby reducing the boiling temperature of water. An algorithm has been developed to relate evaporation chamber and the ejector, using mathematical modelling. Then this model has been used in both desalination approaches. Finaly, the both cyceles have been optimized from both thechnically and economically aspects. In the first cycle, the flashing process will generate vapor and the vapor will be condensed by the condensor. However, in the second cycle, the vapor will be completey extracted by ejector. At the end, the results of optimizations have been compared for both cycles and upsides and downsides of each other have been stated. Results reveal that the total cost of first cycle is lower than the second one.
Keywords: Liquid-Gas Ejector, Sea Water Desalination, Solar Energy,Thechno-Economical Optimization
