Second law analysis of multieffect and multistage flash desalination plants

M. Sh Al-Ahmad, M. A. Darwish

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Although the first law of thermodynamics indicates the overall performance of the desalting plants, it does not show the actual losses from each component (i.e. process) of these plants. These can be revealed by an analysis where the second law of thermodynamics is applied to the multieffect, once through multistage flash, and recirculation multistage flash desalting plants. The exergy losses from the different processes in each plant are determined for each stage or effect. The processes of major exergy losses are the vapor condensation (condenser exergy loss), vapor flashing (flashing exergy loss) and feed heating in the brine heater (heating exergy loss). Finally a comparison between the exergy losses is conducted for the three types of plants and for the same gain ratio. The major specific exergy losses are compared for the three plants. It is found that the multieffect plant is the least exergy wasting plant.

Original languageEnglish
Title of host publicationInstitution of Chemical Engineers Symposium Series
EditorsMiriam Balaban
PublisherPubl by Inst of Chemical Engineers
Pages449
Number of pages1
Volume1
Edition125
Publication statusPublished - 1991
Externally publishedYes
EventProceedings of the Twelfth International Symposium on Desalination and Water Re-use - Malta, Malta
Duration: 15 Apr 199118 Apr 1991

Other

OtherProceedings of the Twelfth International Symposium on Desalination and Water Re-use
CityMalta, Malta
Period15/4/9118/4/91

Fingerprint

Exergy
Desalination
Salt removal
Vapors
Thermodynamics
Heating
Condensation

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Al-Ahmad, M. S., & Darwish, M. A. (1991). Second law analysis of multieffect and multistage flash desalination plants. In M. Balaban (Ed.), Institution of Chemical Engineers Symposium Series (125 ed., Vol. 1, pp. 449). Publ by Inst of Chemical Engineers.

Second law analysis of multieffect and multistage flash desalination plants. / Al-Ahmad, M. Sh; Darwish, M. A.

Institution of Chemical Engineers Symposium Series. ed. / Miriam Balaban. Vol. 1 125. ed. Publ by Inst of Chemical Engineers, 1991. p. 449.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Al-Ahmad, MS & Darwish, MA 1991, Second law analysis of multieffect and multistage flash desalination plants. in M Balaban (ed.), Institution of Chemical Engineers Symposium Series. 125 edn, vol. 1, Publ by Inst of Chemical Engineers, pp. 449, Proceedings of the Twelfth International Symposium on Desalination and Water Re-use, Malta, Malta, 15/4/91.
Al-Ahmad MS, Darwish MA. Second law analysis of multieffect and multistage flash desalination plants. In Balaban M, editor, Institution of Chemical Engineers Symposium Series. 125 ed. Vol. 1. Publ by Inst of Chemical Engineers. 1991. p. 449
Al-Ahmad, M. Sh ; Darwish, M. A. / Second law analysis of multieffect and multistage flash desalination plants. Institution of Chemical Engineers Symposium Series. editor / Miriam Balaban. Vol. 1 125. ed. Publ by Inst of Chemical Engineers, 1991. pp. 449
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