Abstract
Water and energy are essential for human life and inextricably linked to each other. Water is used in the processes of energy generation and transportation and energy is also used in the processes of water exploitation and transportation. In a utility plant, water is used as working fluid for power generation and heat carrier. Large amount of fresh water is required in the utility system to compensate for the water loss due to boiler blowdown, cooling tower blowdown, cooling tower water evaporation, and process hot utility utilization. Since the requirement of boiler feed water is strict, the water treatment in the industrial utility plant is quite energy intensive. Thus, the simultaneous design and optimization of water desalination process and energy generation process is significant. In this paper, a novel superstructure of water desalination and energy generation system is proposed. Thermal membrane distillation unit is applied for water desalination together with reverse osmosis unit. A mathematical model is formulated for the thermodynamic analysis and optimization of the novel system. Two objective functions are used to evaluate the design scheme. A case study is elaborated to test the proposed system and developed model.
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