Increasing the power density and reducing the levelized cost of electricity of a reverse electrodialysis stack through blending
We increase the power density of a reverse electrodialysis (RED) stack by blending the low salinity feed with a higher salinity stream before the stack entrance. This lowers the capital cost of the system and the resulting levelized cost of electricity, enhancing the viability of RED renewable energ...
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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/1721.1/103972 https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0002-3808-8824 |
| _version_ | 1826188613643141120 |
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| author | Weiner, Adam Michael McGovern, Ronan Killian Lienhard, John H. |
| author2 | Center for Clean Water for Clean Energy at MIT |
| author_facet | Center for Clean Water for Clean Energy at MIT Weiner, Adam Michael McGovern, Ronan Killian Lienhard, John H. |
| author_sort | Weiner, Adam Michael |
| collection | MIT |
| description | We increase the power density of a reverse electrodialysis (RED) stack by blending the low salinity feed with a higher salinity stream before the stack entrance. This lowers the capital cost of the system and the resulting levelized cost of electricity, enhancing the viability of RED renewable energy generation. Blending increases the power density by decreasing the dominating electrical resistance in the diluate channel as well as the effective resistance caused by concentration polarization, but not without sacrificing some driving potential. To quantify this trade-off and to evaluate the power density improvement blending can provide, a one-dimensional RED stack model is employed and validated with experimental results from the literature. For a typical stack configured with a feed velocity of 1 cm/s, power density improvements of over 20% and levelized cost of energy reductions of over 40% are achievable, provided the salinity of the available river water is below 200 ppm. Additional cost reductions are realized through back-end blending, whereby the diluate exit stream is used as the higher salinity blend stream. Also, improvements from blending increase for higher feed velocities, shorter stack lengths, and larger channel heights. |
| first_indexed | 2024-09-23T08:02:23Z |
| format | Article |
| id | mit-1721.1/103972 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:02:23Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1039722022-09-23T10:28:51Z Increasing the power density and reducing the levelized cost of electricity of a reverse electrodialysis stack through blending Weiner, Adam Michael McGovern, Ronan Killian Lienhard, John H. Center for Clean Water for Clean Energy at MIT Massachusetts Institute of Technology. Department of Mechanical Engineering Weiner, Adam Michael McGovern, Ronan Killian Lienhard, John H. We increase the power density of a reverse electrodialysis (RED) stack by blending the low salinity feed with a higher salinity stream before the stack entrance. This lowers the capital cost of the system and the resulting levelized cost of electricity, enhancing the viability of RED renewable energy generation. Blending increases the power density by decreasing the dominating electrical resistance in the diluate channel as well as the effective resistance caused by concentration polarization, but not without sacrificing some driving potential. To quantify this trade-off and to evaluate the power density improvement blending can provide, a one-dimensional RED stack model is employed and validated with experimental results from the literature. For a typical stack configured with a feed velocity of 1 cm/s, power density improvements of over 20% and levelized cost of energy reductions of over 40% are achievable, provided the salinity of the available river water is below 200 ppm. Additional cost reductions are realized through back-end blending, whereby the diluate exit stream is used as the higher salinity blend stream. Also, improvements from blending increase for higher feed velocities, shorter stack lengths, and larger channel heights. King Fahd University of Petroleum and Minerals (Center for Clean Water and Clean Energy at MIT and KFUPM, project number R15-CW-11) Massachusetts Life Sciences Center (Hugh Hampton Memorial Fellowship) 2016-08-24T20:57:33Z 2016-08-24T20:57:33Z 2015-04 2015-05 Article http://purl.org/eprint/type/JournalArticle 00119164 http://hdl.handle.net/1721.1/103972 Weiner, Adam M., Ronan K. McGovern, and John H. Lienhard V. “Increasing the Power Density and Reducing the Levelized Cost of Electricity of a Reverse Electrodialysis Stack through Blending.” Desalination 369 (August 2015): 140–148. https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0002-3808-8824 en_US http://dx.doi.org/10.1016/j.desal.2015.04.031 Desalination Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Leinhard via Angie Locknar |
| spellingShingle | Weiner, Adam Michael McGovern, Ronan Killian Lienhard, John H. Increasing the power density and reducing the levelized cost of electricity of a reverse electrodialysis stack through blending |
| title | Increasing the power density and reducing the levelized cost of electricity of a reverse electrodialysis stack through blending |
| title_full | Increasing the power density and reducing the levelized cost of electricity of a reverse electrodialysis stack through blending |
| title_fullStr | Increasing the power density and reducing the levelized cost of electricity of a reverse electrodialysis stack through blending |
| title_full_unstemmed | Increasing the power density and reducing the levelized cost of electricity of a reverse electrodialysis stack through blending |
| title_short | Increasing the power density and reducing the levelized cost of electricity of a reverse electrodialysis stack through blending |
| title_sort | increasing the power density and reducing the levelized cost of electricity of a reverse electrodialysis stack through blending |
| url | http://hdl.handle.net/1721.1/103972 https://orcid.org/0000-0002-2901-0638 https://orcid.org/0000-0002-3808-8824 |
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