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Unformatted text preview: distillation units. Electrical energy is also used to run auxiliary equipment, such as pumps, fans, and control devices, and to provide the site with electricity. Solar-driven desalination plants are unsteady-state systems. Solar energy can be stored as: sensible heat in water tanks, in phase change material, and in batteries as electrical energy to smooth operation during night and/or cloudy days. Some challenges related to transport processes in solar driven energy include the fact that it is an unsteady-state system. This is mainly caused by the environment factor. This unknown factor causes problems and unexpected events. Predicting the amount of energy that will be given in any output instance is unpredictable. In conclusion, there is a lack of exact mathematics expression for the unsteady-state process because of the differential item in the universal energy balance equation....
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- Spring '09