Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/35709
Title: The exergetic efficiency as a performance evaluation tool in reverse osmosis desalination plants in operation
Authors: Blanco-Marigorta, A. M. 
Lozano-Medina, A. 
Marcos, J. D.
UNESCO Clasification: 250811 Calidad de las aguas
330811 Control de la contaminación del agua
Keywords: Desalination
Reverse osmosis
Exergy
Exergetic efficiency
Issue Date: 2017
Journal: Desalination (Amsterdam) 
Abstract: Exergetic efficiency characterizes the performance of a system or a system component from the second-law of Thermodynamics viewpoint. Although this parameter can be used in the comparison of the operation of similar components working under similar conditions, there are not many articles in the literature dealing with this purpose. In this paper, a desalination plant located in Gran Canaria (Canary Islands, Spain) is considered. Different configurations are possible in the ten reverse osmosis production lines of the plant, depending on the procedure used for the energy recovery, the number of reverse osmosis stages, the technologies applied to the intake and filtration processes, or the components involved in feed water pressurization. Using real data, the exergetic efficiency is assessed as a performance evaluation tool. Through the comparison of the exergetic efficiency of similar devices, though different production lines, the components with operation defects that should be repaired are identified: the most inefficient pelton turbines, intake pumps, high pressure pumps, booster pumps, reverse osmosis membrane modules, and pressure exchanger modules. This way, exergetic efficiency can be successfully used to control and to improve the operation of the plant.
URI: http://hdl.handle.net/10553/35709
ISSN: 0011-9164
DOI: 10.1016/j.desal.2017.03.007
Source: Desalination[ISSN 0011-9164],v. 413, p. 19-28
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