Thermo-economic analysis of a combined solar organic Rankine cycle-reverse osmosis desalination process with different energy recovery configurations

Thermo-economy is a useful and powerful tool that combines thermodynamics and economics. It can evaluate how irreversibility and costs of any process affect the exergoeconomic cost of the product. In this work, a number of comparisons for solar thermal-powered different recovery units for reverse os...

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Bibliographic Details
Published in:Desalination 2010-10, Vol.261 (1), p.138-147
Main Authors: Nafey, A.S., Sharaf, M.A., García-Rodríguez, Lourdes
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Costs
Desalination
Drinking water and swimming-pool water. Desalination
Economics
Exact sciences and technology
Exchange
Maintenance costs
MatLab/SimuLink
Membrane separation (reverse osmosis, dialysis...)
Osmosis
Pollution
Reverse osmosis (RO)
Solar Rankine cycle
Thermo-economic
Turbines
Water treatment and pollution
Wheels
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Summary:Thermo-economy is a useful and powerful tool that combines thermodynamics and economics. It can evaluate how irreversibility and costs of any process affect the exergoeconomic cost of the product. In this work, a number of comparisons for solar thermal-powered different recovery units for reverse osmosis desalination system are performed using thermo-economic analysis. Three different configurations are used for this comparison (Basic, Pelton Wheel Turbine, and the Pressure Exchanger) with Sharm El-Shiekh RO desalination plant for a total productivity about 145.8 m 3/h (40.5 kg/s). As a result of this analysis, the unit product cost of Pelton Wheel Turbine (PWT) and Pressure Exchanger (PEX) configurations are 24% and 24.2% respectively less than that of the basic configuration. Thermo-economic analysis shows that the minimum investment and operating & maintenance costs are obtained by PEX configuration. Also, it achieves minimum exergy destruction against the two other configurations (Pelton Wheel and Basic systems). Therefore, the final conclusion of this work is that the PEX configuration is more economical than either stand alone or PWT configurations.
ISSN:0011-9164
1873-4464
DOI:10.1016/j.desal.2010.05.017