Thermodynamic balancing of a fixed-size two-stage humidification dehumidification desalination system
Humidification dehumidification (HDH) is a desalination technology that has shown promise in small scale, decentralized applications. Previous studies on the multi-staging of HDH have used fixed-effectiveness models which do not explicitly account for transport processes in the components. However,...
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| Format: | Article |
| Language: | en_US |
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Elsevier
2016
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| Online Access: | http://hdl.handle.net/1721.1/102490 https://orcid.org/0000-0003-3559-9167 https://orcid.org/0000-0002-2901-0638 |
| _version_ | 1826195446061596672 |
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| author | Narayan, G. Prakash Zubair, Syed M. Chehayeb, Karim Malek 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 Narayan, G. Prakash Zubair, Syed M. Chehayeb, Karim Malek Lienhard, John H |
| author_sort | Narayan, G. Prakash |
| collection | MIT |
| description | Humidification dehumidification (HDH) is a desalination technology that has shown promise in small scale, decentralized applications. Previous studies on the multi-staging of HDH have used fixed-effectiveness models which do not explicitly account for transport processes in the components. However, to fully understand the effect of the variation of the mass flow rate ratio, it is necessary to implement heat and mass transfer models of the HDH system. In this paper, we model an HDH system consisting of a packed-bed humidifier and a multi-tray bubble column dehumidifier. We study the effect of the mass flow rate ratio on the performance of a fixed-size system, and we consider its effect on the entropy generation and the driving forces for heat and mass transfer. In addition, we define a generalized energy effectiveness for heat and mass exchangers. We also implement an air extraction/injection and simulate a wide range of operating conditions. We define criteria for the best system performance, and we study the effect of the distribution of available area between separate stages. We also present a thorough explanation of why the direction of extraction should always be from the humidifier to the dehumidifier. |
| first_indexed | 2024-09-23T10:12:49Z |
| format | Article |
| id | mit-1721.1/102490 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:12:49Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1024902023-02-17T02:05:37Z Thermodynamic balancing of a fixed-size two-stage humidification dehumidification desalination system Narayan, G. Prakash Zubair, Syed M. Chehayeb, Karim Malek Lienhard, John H Massachusetts Institute of Technology. Abdul Latif Jameel World Water & Food Security Lab Massachusetts Institute of Technology. Department of Mechanical Engineering Lienhard, John H. Chehayeb, Karim Malek Lienhard, John H. Humidification dehumidification (HDH) is a desalination technology that has shown promise in small scale, decentralized applications. Previous studies on the multi-staging of HDH have used fixed-effectiveness models which do not explicitly account for transport processes in the components. However, to fully understand the effect of the variation of the mass flow rate ratio, it is necessary to implement heat and mass transfer models of the HDH system. In this paper, we model an HDH system consisting of a packed-bed humidifier and a multi-tray bubble column dehumidifier. We study the effect of the mass flow rate ratio on the performance of a fixed-size system, and we consider its effect on the entropy generation and the driving forces for heat and mass transfer. In addition, we define a generalized energy effectiveness for heat and mass exchangers. We also implement an air extraction/injection and simulate a wide range of operating conditions. We define criteria for the best system performance, and we study the effect of the distribution of available area between separate stages. We also present a thorough explanation of why the direction of extraction should always be from the humidifier to the dehumidifier. Center for Clean Water and Clean Energy at MIT and KFUPM (Project R4-CW-08) 2016-05-13T19:25:02Z 2016-05-13T19:25:02Z 2015-05 2015-04 Article http://purl.org/eprint/type/JournalArticle 00119164 http://hdl.handle.net/1721.1/102490 Chehayeb, Karim M., G. Prakash Narayan, Syed M. Zubair, and John H. Lienhard. “Thermodynamic Balancing of a Fixed-Size Two-Stage Humidification Dehumidification Desalination System.” Desalination 369 (August 2015): 125–139. https://orcid.org/0000-0003-3559-9167 https://orcid.org/0000-0002-2901-0638 en_US http://dx.doi.org/10.1016/j.desal.2015.04.021 Desalination Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Elsevier Prof. Lienhard via Angie Locknar |
| spellingShingle | Narayan, G. Prakash Zubair, Syed M. Chehayeb, Karim Malek Lienhard, John H Thermodynamic balancing of a fixed-size two-stage humidification dehumidification desalination system |
| title | Thermodynamic balancing of a fixed-size two-stage humidification dehumidification desalination system |
| title_full | Thermodynamic balancing of a fixed-size two-stage humidification dehumidification desalination system |
| title_fullStr | Thermodynamic balancing of a fixed-size two-stage humidification dehumidification desalination system |
| title_full_unstemmed | Thermodynamic balancing of a fixed-size two-stage humidification dehumidification desalination system |
| title_short | Thermodynamic balancing of a fixed-size two-stage humidification dehumidification desalination system |
| title_sort | thermodynamic balancing of a fixed size two stage humidification dehumidification desalination system |
| url | http://hdl.handle.net/1721.1/102490 https://orcid.org/0000-0003-3559-9167 https://orcid.org/0000-0002-2901-0638 |
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