EFFECT OF MODULE INCLINATION ANGLE ON AIR GAP MEMBRANE DISTILLATION
Air gap membrane distillation (AGMD) experiments were performed with varied temperature and varied module inclination angles to characterize the effect of module angle on permeate production and thermal performance. While AGMD is potentially one of the most energy efficient membrane distillation con...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
2015
|
| Online Access: | http://hdl.handle.net/1721.1/100241 https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0001-8375-2694 https://orcid.org/0000-0003-3446-1473 |
| _version_ | 1811094767838167040 |
|---|---|
| author | Warsinger, David Elan Martin Swaminathan, Jaichander 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 Warsinger, David Elan Martin Swaminathan, Jaichander Lienhard, John H |
| author_sort | Warsinger, David Elan Martin |
| collection | MIT |
| description | Air gap membrane distillation (AGMD) experiments were performed with varied temperature and varied module inclination angles to characterize the effect of module angle on permeate production and thermal performance. While AGMD is potentially one of the most energy efficient membrane distillation configurations, transport resistances in the air gap typically dominate the thermal performance, resulting in degraded permeate production. Tilting the module away from vertical offers the opportunity to manipulate the condensate layer and its associated thermal resistance. In this study, we report experiments on varying module tilt angle performed with a flat plate AGMD module under fully characterized heat and mass transfer conditions. Numerical modeling is also performed to better understand the experimental results. The tests indicated that the AGMD system behaves as a “permeate gap”, or flooded membrane distillation system for declined and extremely inclined positions. A key finding relevant to all AGMD systems is that at highly negative tilt angles (more than 30 degrees), condensate may fall onto the membrane causing thermal bridging and increased permeate production. Near vertical and positive tilt angles (<15 degrees from vertical) show no significant effect of module tilt on performance, in line with model predictions. |
| first_indexed | 2024-09-23T16:04:47Z |
| format | Article |
| id | mit-1721.1/100241 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:04:47Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | mit-1721.1/1002412023-02-17T02:05:30Z EFFECT OF MODULE INCLINATION ANGLE ON AIR GAP MEMBRANE DISTILLATION Warsinger, David Elan Martin Swaminathan, Jaichander Lienhard, John H Massachusetts Institute of Technology. Abdul Latif Jameel World Water & Food Security Lab Massachusetts Institute of Technology. Department of Mechanical Engineering Warsinger, David Elan Martin Swaminathan, Jaichander Lienhard, John H. Air gap membrane distillation (AGMD) experiments were performed with varied temperature and varied module inclination angles to characterize the effect of module angle on permeate production and thermal performance. While AGMD is potentially one of the most energy efficient membrane distillation configurations, transport resistances in the air gap typically dominate the thermal performance, resulting in degraded permeate production. Tilting the module away from vertical offers the opportunity to manipulate the condensate layer and its associated thermal resistance. In this study, we report experiments on varying module tilt angle performed with a flat plate AGMD module under fully characterized heat and mass transfer conditions. Numerical modeling is also performed to better understand the experimental results. The tests indicated that the AGMD system behaves as a “permeate gap”, or flooded membrane distillation system for declined and extremely inclined positions. A key finding relevant to all AGMD systems is that at highly negative tilt angles (more than 30 degrees), condensate may fall onto the membrane causing thermal bridging and increased permeate production. Near vertical and positive tilt angles (<15 degrees from vertical) show no significant effect of module tilt on performance, in line with model predictions. MIT Masdar Program (02/MI/MI/CP/11/07633/GEN/G/00) 2015-12-14T19:41:06Z 2015-12-14T19:41:06Z 2014-08 Article http://purl.org/eprint/type/ConferencePaper http://hdl.handle.net/1721.1/100241 Warsinger, David E. M., Jaichander Swaminathan, and John H. Lienhard V. "EFFECT OF MODULE INCLINATION ANGLE ON AIR GAP MEMBRANE DISTILLATION." 15th International Heat Transfer Conference (IHTC-15) (August 2014). https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0001-8375-2694 https://orcid.org/0000-0003-3446-1473 en_US http://www.ihtc-15.org/program.shtml Proceedings of the 15th International Heat Transfer Conference (IHTC-15) Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Prof. Lienhard via Angie Locknar |
| spellingShingle | Warsinger, David Elan Martin Swaminathan, Jaichander Lienhard, John H EFFECT OF MODULE INCLINATION ANGLE ON AIR GAP MEMBRANE DISTILLATION |
| title | EFFECT OF MODULE INCLINATION ANGLE ON AIR GAP MEMBRANE DISTILLATION |
| title_full | EFFECT OF MODULE INCLINATION ANGLE ON AIR GAP MEMBRANE DISTILLATION |
| title_fullStr | EFFECT OF MODULE INCLINATION ANGLE ON AIR GAP MEMBRANE DISTILLATION |
| title_full_unstemmed | EFFECT OF MODULE INCLINATION ANGLE ON AIR GAP MEMBRANE DISTILLATION |
| title_short | EFFECT OF MODULE INCLINATION ANGLE ON AIR GAP MEMBRANE DISTILLATION |
| title_sort | effect of module inclination angle on air gap membrane distillation |
| url | http://hdl.handle.net/1721.1/100241 https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0001-8375-2694 https://orcid.org/0000-0003-3446-1473 |
| work_keys_str_mv | AT warsingerdavidelanmartin effectofmoduleinclinationangleonairgapmembranedistillation AT swaminathanjaichander effectofmoduleinclinationangleonairgapmembranedistillation AT lienhardjohnh effectofmoduleinclinationangleonairgapmembranedistillation |