Analytical Modeling of a Bubble Column Dehumidifier
Bubble column dehumidifiers are a compact, inexpensive alternative to conventional fin-tube dehumidifiers for humidification-dehumidification (HDH) desalination, a technology that has promising applications in small-scale desalination and industrial water remediation. In this paper, algebraic equati...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
ASME International
2014
|
| Online Access: | http://hdl.handle.net/1721.1/86322 https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0002-0606-713X |
| _version_ | 1826192322183823360 |
|---|---|
| author | Tow, Emily W. Lienhard, John H. |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Tow, Emily W. Lienhard, John H. |
| author_sort | Tow, Emily W. |
| collection | MIT |
| description | Bubble column dehumidifiers are a compact, inexpensive alternative to conventional fin-tube dehumidifiers for humidification-dehumidification (HDH) desalination, a technology that has promising applications in small-scale desalination and industrial water remediation. In this paper, algebraic equations for relevant mean heat and mass transfer driving forces are developed for improved modeling of bubble column dehumidifiers. Because mixing in the column ensures a uniform liquid temperature, the bubble column can be modeled as two single stream heat exchangers in contact with the column liquid: the seawater side, for which a log-mean temperature difference is appropriate, and the gas side, which has a varying heat capacity and mass exchange. Under typical conditions, a log-mean mass fraction difference is shown to drive latent heat transfer, and an expression for the mean temperature difference of the moist gas stream is presented. These expressions will facilitate modeling of bubble column heat and mass exchangers. |
| first_indexed | 2024-09-23T09:09:42Z |
| format | Article |
| id | mit-1721.1/86322 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:09:42Z |
| publishDate | 2014 |
| publisher | ASME International |
| record_format | dspace |
| spelling | mit-1721.1/863222022-09-30T13:52:16Z Analytical Modeling of a Bubble Column Dehumidifier Tow, Emily W. Lienhard, John H. Massachusetts Institute of Technology. Department of Mechanical Engineering Tow, Emily W. Lienhard, John H. Bubble column dehumidifiers are a compact, inexpensive alternative to conventional fin-tube dehumidifiers for humidification-dehumidification (HDH) desalination, a technology that has promising applications in small-scale desalination and industrial water remediation. In this paper, algebraic equations for relevant mean heat and mass transfer driving forces are developed for improved modeling of bubble column dehumidifiers. Because mixing in the column ensures a uniform liquid temperature, the bubble column can be modeled as two single stream heat exchangers in contact with the column liquid: the seawater side, for which a log-mean temperature difference is appropriate, and the gas side, which has a varying heat capacity and mass exchange. Under typical conditions, a log-mean mass fraction difference is shown to drive latent heat transfer, and an expression for the mean temperature difference of the moist gas stream is presented. These expressions will facilitate modeling of bubble column heat and mass exchangers. National Science Foundation (U.S.) Flowers Family Fellowship MIT Department of Physics Pappalardo Program (Fellowship) Center for Clean Water and Clean Energy at MIT and KFUPM 2014-05-01T14:55:39Z 2014-05-01T14:55:39Z 2013-07 Article http://purl.org/eprint/type/ConferencePaper 978-0-7918-5549-2 http://hdl.handle.net/1721.1/86322 Tow, Emily W., and John H. Lienhard. “Analytical Modeling of a Bubble Column Dehumidifier.” Volume 3: Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat Transfer in Electronic Equipment; Symposium in Honor of Professor Richard Goldstein; Symposium in Honor of Prof. Spalding; Symposium in Honor of Prof. Arthur E. Bergles (July 14, 2013). https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0002-0606-713X en_US http://dx.doi.org/10.1115/HT2013-17763 Volume 3: Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat Transfer in Electronic Equipment; Symposium in Honor of Professor Richard Goldstein; Symposium in Honor of Prof. Spalding; Symposium in Honor of Prof. Arthur E. Bergles Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf ASME International Prof. Lienhard via Angie Locknar |
| spellingShingle | Tow, Emily W. Lienhard, John H. Analytical Modeling of a Bubble Column Dehumidifier |
| title | Analytical Modeling of a Bubble Column Dehumidifier |
| title_full | Analytical Modeling of a Bubble Column Dehumidifier |
| title_fullStr | Analytical Modeling of a Bubble Column Dehumidifier |
| title_full_unstemmed | Analytical Modeling of a Bubble Column Dehumidifier |
| title_short | Analytical Modeling of a Bubble Column Dehumidifier |
| title_sort | analytical modeling of a bubble column dehumidifier |
| url | http://hdl.handle.net/1721.1/86322 https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0002-0606-713X |
| work_keys_str_mv | AT towemilyw analyticalmodelingofabubblecolumndehumidifier AT lienhardjohnh analyticalmodelingofabubblecolumndehumidifier |