An exergy approach to efficiency evaluation of desalination

Handle URI:
http://hdl.handle.net/10754/623674
Title:
An exergy approach to efficiency evaluation of desalination
Authors:
Ng, Kim Choon ( 0000-0003-3930-4127 ) ; Shahzad, Muhammad Wakil; Son, Hyuk Soo; Hamed, Osman A.
Abstract:
This paper presents an evaluation process efficiency based on the consumption of primary energy for all types of practical desalination methods available hitherto. The conventional performance ratio has, thus far, been defined with respect to the consumption of derived energy, such as the electricity or steam, which are susceptible to the conversion losses of power plants and boilers that burned the input primary fuels. As derived energies are usually expressed by the units, either kWh or Joules, these units cannot differentiate the grade of energy supplied to the processes accurately. In this paper, the specific energy consumption is revisited for the efficacy of all large-scale desalination plants. In today's combined production of electricity and desalinated water, accomplished with advanced cogeneration concept, the input exergy of fuels is utilized optimally and efficiently in a temperature cascaded manner. By discerning the exergy destruction successively in the turbines and desalination processes, the relative contribution of primary energy to the processes can be accurately apportioned to the input primary energy. Although efficiency is not a law of thermodynamics, however, a common platform for expressing the figures of merit explicit to the efficacy of desalination processes can be developed meaningfully that has the thermodynamic rigor up to the ideal or thermodynamic limit of seawater desalination for all scientists and engineers to aspire to.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Ng KC, Shahzad MW, Son HS, Hamed OA (2017) An exergy approach to efficiency evaluation of desalination. Applied Physics Letters 110: 184101. Available: http://dx.doi.org/10.1063/1.4982628.
Publisher:
AIP Publishing
Journal:
Applied Physics Letters
KAUST Grant Number:
FCC/1/1971-03-01
Issue Date:
2-May-2017
DOI:
10.1063/1.4982628
Type:
Article
ISSN:
0003-6951; 1077-3118
Sponsors:
The authors would like to thank the King Abdullah University of Science and Technology (KAUST) (CCF3 Project No: FCC/1/1971-03-01) and Desalination Technology Research Institute (DTRI) of SWCC.
Additional Links:
http://aip.scitation.org/doi/10.1063/1.4982628
Appears in Collections:
Articles; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorNg, Kim Choonen
dc.contributor.authorShahzad, Muhammad Wakilen
dc.contributor.authorSon, Hyuk Sooen
dc.contributor.authorHamed, Osman A.en
dc.date.accessioned2017-05-22T06:58:02Z-
dc.date.available2017-05-22T06:58:02Z-
dc.date.issued2017-05-02en
dc.identifier.citationNg KC, Shahzad MW, Son HS, Hamed OA (2017) An exergy approach to efficiency evaluation of desalination. Applied Physics Letters 110: 184101. Available: http://dx.doi.org/10.1063/1.4982628.en
dc.identifier.issn0003-6951en
dc.identifier.issn1077-3118en
dc.identifier.doi10.1063/1.4982628en
dc.identifier.urihttp://hdl.handle.net/10754/623674-
dc.description.abstractThis paper presents an evaluation process efficiency based on the consumption of primary energy for all types of practical desalination methods available hitherto. The conventional performance ratio has, thus far, been defined with respect to the consumption of derived energy, such as the electricity or steam, which are susceptible to the conversion losses of power plants and boilers that burned the input primary fuels. As derived energies are usually expressed by the units, either kWh or Joules, these units cannot differentiate the grade of energy supplied to the processes accurately. In this paper, the specific energy consumption is revisited for the efficacy of all large-scale desalination plants. In today's combined production of electricity and desalinated water, accomplished with advanced cogeneration concept, the input exergy of fuels is utilized optimally and efficiently in a temperature cascaded manner. By discerning the exergy destruction successively in the turbines and desalination processes, the relative contribution of primary energy to the processes can be accurately apportioned to the input primary energy. Although efficiency is not a law of thermodynamics, however, a common platform for expressing the figures of merit explicit to the efficacy of desalination processes can be developed meaningfully that has the thermodynamic rigor up to the ideal or thermodynamic limit of seawater desalination for all scientists and engineers to aspire to.en
dc.description.sponsorshipThe authors would like to thank the King Abdullah University of Science and Technology (KAUST) (CCF3 Project No: FCC/1/1971-03-01) and Desalination Technology Research Institute (DTRI) of SWCC.en
dc.publisherAIP Publishingen
dc.relation.urlhttp://aip.scitation.org/doi/10.1063/1.4982628en
dc.rightsThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Applied Physics Letters and may be found at http://doi.org/10.1063/1.4982628.en
dc.titleAn exergy approach to efficiency evaluation of desalinationen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalApplied Physics Lettersen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Technology and Research Institute, Saline Water Conversion Corporation, Jubial, 35514-3717, , Saudi Arabiaen
kaust.authorNg, Kim Choonen
kaust.authorShahzad, Muhammad Wakilen
kaust.authorSon, Hyuk Sooen
kaust.grant.numberFCC/1/1971-03-01en
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