Enhanced Performance of Membrane Distillation Using Surface Heating Process
Membrane distillation (MD) is a thermally driven desalination process that has excellent application prospects in seawater desalination or hypersaline wastewater treatment, while severe temperature polarization (TP) and the resulting relatively high energy consumption have become principal challenge...
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MDPI AG
2021
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oai:doaj.org-article:c52f9db725d14001ae5d2515facc969b2021-11-25T18:19:55ZEnhanced Performance of Membrane Distillation Using Surface Heating Process10.3390/membranes111108662077-0375https://doaj.org/article/c52f9db725d14001ae5d2515facc969b2021-11-01T00:00:00Zhttps://www.mdpi.com/2077-0375/11/11/866https://doaj.org/toc/2077-0375Membrane distillation (MD) is a thermally driven desalination process that has excellent application prospects in seawater desalination or hypersaline wastewater treatment, while severe temperature polarization (TP) and the resulting relatively high energy consumption have become principal challenges limiting the commercial application of MD. Therefore, the design of novel systems to overcome the shortage of conventional MD requires urgent attention. Here, we developed three surface heating vacuum membrane distillation systems, namely, SHVMD-1, SHVMD-2, and SHVMD-3, according to the different positions of the thermal conducting layer in the cell. The distillate flux, TP, and energy performance of these systems under different operating conditions were investigated. All three systems showed stable performance, with a salt rejection >99.98% for 35 g/L NaCl, and the highest flux was close to 9 L/m<sup>2</sup>·h. The temperature polarization coefficients were higher than unity in SHVMD-2 and SHVMD-3 systems, and the SHVMD-2 system produced the lowest specific energy consumption and the highest thermal efficiency. In addition, we tested the intermittent surface heating process, which can further improve energy performance through reducing specific electrical energy consumption in vacuum membrane distillation. This paper provides a simple and efficient membrane system for the desalination of brines.Fei HanShuxun LiuKang WangXiaoyuan ZhangMDPI AGarticlemembrane distillationsurface heatinghypersaline water treatmenttemperature polarizationthermal efficiencyspecific energy consumptionChemical technologyTP1-1185Chemical engineeringTP155-156ENMembranes, Vol 11, Iss 866, p 866 (2021) |
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DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
membrane distillation surface heating hypersaline water treatment temperature polarization thermal efficiency specific energy consumption Chemical technology TP1-1185 Chemical engineering TP155-156 |
| spellingShingle |
membrane distillation surface heating hypersaline water treatment temperature polarization thermal efficiency specific energy consumption Chemical technology TP1-1185 Chemical engineering TP155-156 Fei Han Shuxun Liu Kang Wang Xiaoyuan Zhang Enhanced Performance of Membrane Distillation Using Surface Heating Process |
| description |
Membrane distillation (MD) is a thermally driven desalination process that has excellent application prospects in seawater desalination or hypersaline wastewater treatment, while severe temperature polarization (TP) and the resulting relatively high energy consumption have become principal challenges limiting the commercial application of MD. Therefore, the design of novel systems to overcome the shortage of conventional MD requires urgent attention. Here, we developed three surface heating vacuum membrane distillation systems, namely, SHVMD-1, SHVMD-2, and SHVMD-3, according to the different positions of the thermal conducting layer in the cell. The distillate flux, TP, and energy performance of these systems under different operating conditions were investigated. All three systems showed stable performance, with a salt rejection >99.98% for 35 g/L NaCl, and the highest flux was close to 9 L/m<sup>2</sup>·h. The temperature polarization coefficients were higher than unity in SHVMD-2 and SHVMD-3 systems, and the SHVMD-2 system produced the lowest specific energy consumption and the highest thermal efficiency. In addition, we tested the intermittent surface heating process, which can further improve energy performance through reducing specific electrical energy consumption in vacuum membrane distillation. This paper provides a simple and efficient membrane system for the desalination of brines. |
| format |
article |
| author |
Fei Han Shuxun Liu Kang Wang Xiaoyuan Zhang |
| author_facet |
Fei Han Shuxun Liu Kang Wang Xiaoyuan Zhang |
| author_sort |
Fei Han |
| title |
Enhanced Performance of Membrane Distillation Using Surface Heating Process |
| title_short |
Enhanced Performance of Membrane Distillation Using Surface Heating Process |
| title_full |
Enhanced Performance of Membrane Distillation Using Surface Heating Process |
| title_fullStr |
Enhanced Performance of Membrane Distillation Using Surface Heating Process |
| title_full_unstemmed |
Enhanced Performance of Membrane Distillation Using Surface Heating Process |
| title_sort |
enhanced performance of membrane distillation using surface heating process |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/c52f9db725d14001ae5d2515facc969b |
| work_keys_str_mv |
AT feihan enhancedperformanceofmembranedistillationusingsurfaceheatingprocess AT shuxunliu enhancedperformanceofmembranedistillationusingsurfaceheatingprocess AT kangwang enhancedperformanceofmembranedistillationusingsurfaceheatingprocess AT xiaoyuanzhang enhancedperformanceofmembranedistillationusingsurfaceheatingprocess |
| _version_ |
1718411345391517696 |