On exergy calculations of seawater with applications in desalination systems
Exergy analysis is a powerful diagnostic tool in thermal systems performance evaluation. The use of such an analysis in seawater desalination processes is of growing importance to determine the sites of the highest irreversible losses. In the literature, exergy analyses of seawater desalination syst...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Elsevier
2016
|
| Online Access: | http://hdl.handle.net/1721.1/101905 https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0003-4777-1286 |
| _version_ | 1826193707074846720 |
|---|---|
| author | Sharqawy, Mostafa H. Zubair, Syed M. Lienhard, John H |
| author2 | Massachusetts Institute of Technology. Abdul Latif Jameel World Water & Food Security Lab |
| author_facet | Massachusetts Institute of Technology. Abdul Latif Jameel World Water & Food Security Lab Sharqawy, Mostafa H. Zubair, Syed M. Lienhard, John H |
| author_sort | Sharqawy, Mostafa H. |
| collection | MIT |
| description | Exergy analysis is a powerful diagnostic tool in thermal systems performance evaluation. The use of such an analysis in seawater desalination processes is of growing importance to determine the sites of the highest irreversible losses. In the literature, exergy analyses of seawater desalination systems have sometimes modeled seawater as sodium chloride solutions of equivalent salt content or salinity; however, such matching does not bring all important properties of the two solutions into agreement. Furthermore, a common model that represents seawater as an ideal mixture of liquid water and solid sodium chloride may have serious shortcomings. Therefore, in this paper, the most up-to-date thermodynamic properties of seawater, as needed to conduct an exergy analysis, are given as correlations and tabulated data. The effect of the system properties as well as the environment dead state on the exergy and flow exergy variation is investigated. In addition, an exergy analysis for a large MSF distillation plant is performed using plant operating data and results previously published using the above-mentioned ideal mixture model. It is demonstrated that this ideal mixture model gives flow exergy values that are far from the correct ones. Moreover, the second law efficiency differs by about 80% for some cases. |
| first_indexed | 2024-09-23T09:43:23Z |
| format | Article |
| id | mit-1721.1/101905 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2025-03-10T08:07:15Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1019052025-02-25T15:29:29Z On exergy calculations of seawater with applications in desalination systems Sharqawy, Mostafa H. Zubair, Syed M. Lienhard, John H Massachusetts Institute of Technology. Abdul Latif Jameel World Water & Food Security Lab Massachusetts Institute of Technology. Department of Mechanical Engineering Sharqawy, Mostafa H. Lienhard, John H. Exergy analysis is a powerful diagnostic tool in thermal systems performance evaluation. The use of such an analysis in seawater desalination processes is of growing importance to determine the sites of the highest irreversible losses. In the literature, exergy analyses of seawater desalination systems have sometimes modeled seawater as sodium chloride solutions of equivalent salt content or salinity; however, such matching does not bring all important properties of the two solutions into agreement. Furthermore, a common model that represents seawater as an ideal mixture of liquid water and solid sodium chloride may have serious shortcomings. Therefore, in this paper, the most up-to-date thermodynamic properties of seawater, as needed to conduct an exergy analysis, are given as correlations and tabulated data. The effect of the system properties as well as the environment dead state on the exergy and flow exergy variation is investigated. In addition, an exergy analysis for a large MSF distillation plant is performed using plant operating data and results previously published using the above-mentioned ideal mixture model. It is demonstrated that this ideal mixture model gives flow exergy values that are far from the correct ones. Moreover, the second law efficiency differs by about 80% for some cases. Center for Clean Water and Clean Energy at MIT and KFUPM 2016-03-29T17:18:56Z 2016-03-29T17:18:56Z 2010-11 2010-09 Article http://purl.org/eprint/type/JournalArticle 12900729 http://hdl.handle.net/1721.1/101905 Sharqawy, Mostafa H., John H. Lienhard V, and Syed M. Zubair. “On Exergy Calculations of Seawater with Applications in Desalination Systems.” International Journal of Thermal Sciences 50, no. 2 (February 2011): 187–196. https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0003-4777-1286 en_US http://dx.doi.org/10.1016/j.ijthermalsci.2010.09.013 International Journal of Thermal Sciences Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Lienhard via Angie Locknar |
| spellingShingle | Sharqawy, Mostafa H. Zubair, Syed M. Lienhard, John H On exergy calculations of seawater with applications in desalination systems |
| title | On exergy calculations of seawater with applications in desalination systems |
| title_full | On exergy calculations of seawater with applications in desalination systems |
| title_fullStr | On exergy calculations of seawater with applications in desalination systems |
| title_full_unstemmed | On exergy calculations of seawater with applications in desalination systems |
| title_short | On exergy calculations of seawater with applications in desalination systems |
| title_sort | on exergy calculations of seawater with applications in desalination systems |
| url | http://hdl.handle.net/1721.1/101905 https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0003-4777-1286 |
| work_keys_str_mv | AT sharqawymostafah onexergycalculationsofseawaterwithapplicationsindesalinationsystems AT zubairsyedm onexergycalculationsofseawaterwithapplicationsindesalinationsystems AT lienhardjohnh onexergycalculationsofseawaterwithapplicationsindesalinationsystems |