Hybrid Mechanical Vapor Compression and Membrane Distillation System: Concept and Analysis
The concept of integrating mechanical vapor compression (MVC) with direct contact membrane distillation (DCMD) is presented and analyzed. The hybrid system utilizes the DCMD to harvest the thermal energy of the MVC reject brine to preheat a portion of the seawater intake and simultaneously produce a...
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MDPI AG
2025-02-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/15/3/69 |
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| author | Emad Ali Jamel Orfi Salim Mokraoui |
| author_facet | Emad Ali Jamel Orfi Salim Mokraoui |
| author_sort | Emad Ali |
| collection | DOAJ |
| description | The concept of integrating mechanical vapor compression (MVC) with direct contact membrane distillation (DCMD) is presented and analyzed. The hybrid system utilizes the DCMD to harvest the thermal energy of the MVC reject brine to preheat a portion of the seawater intake and simultaneously produce additional fresh water. Based on the operating temperature, the hybrid system requires specific energy consumption between 9.6 to 24.3 kWh/m<sup>3</sup>, which is equivalent to 25 to 37% less than the standalone MVC. Similarly, the freshwater production of the hybrid system can range between 1.03 and 1.1 kg/h, which is equivalent to a 3% and 10% increase relative to the standalone MVC when operating at brine temperatures of 50 and 90 °C, respectively. However, this enhancement is achieved at the expense of an average of 60% larger total surface area. This is partially due to the incorporation of the surface area of the MD modules and mostly to reduced temperature differences. Altering the permeate-to-feed ratio of the DCMD module led to a marginal change in the overall production without any enhancement in the compression power consumption. Increasing the MD module length by 50% resulted in a 3% enlargement in the overall production rate and a 10% reduction in power consumption. A modified hybrid structure that additionally utilizes the distillate heat is sought. A 5% increase in water production at the expense of a 45% rise in the specific compression energy of the modified structure over the original hybrid system is obtained. |
| format | Article |
| id | doaj-art-1c37e1fb72af43fc9e0d91c9b53c047a |
| institution | OA Journals |
| issn | 2077-0375 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
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| series | Membranes |
| spelling | doaj-art-1c37e1fb72af43fc9e0d91c9b53c047a2025-08-20T01:48:41ZengMDPI AGMembranes2077-03752025-02-011536910.3390/membranes15030069Hybrid Mechanical Vapor Compression and Membrane Distillation System: Concept and AnalysisEmad Ali0Jamel Orfi1Salim Mokraoui2Chemical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi ArabiaMechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi ArabiaChemical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi ArabiaThe concept of integrating mechanical vapor compression (MVC) with direct contact membrane distillation (DCMD) is presented and analyzed. The hybrid system utilizes the DCMD to harvest the thermal energy of the MVC reject brine to preheat a portion of the seawater intake and simultaneously produce additional fresh water. Based on the operating temperature, the hybrid system requires specific energy consumption between 9.6 to 24.3 kWh/m<sup>3</sup>, which is equivalent to 25 to 37% less than the standalone MVC. Similarly, the freshwater production of the hybrid system can range between 1.03 and 1.1 kg/h, which is equivalent to a 3% and 10% increase relative to the standalone MVC when operating at brine temperatures of 50 and 90 °C, respectively. However, this enhancement is achieved at the expense of an average of 60% larger total surface area. This is partially due to the incorporation of the surface area of the MD modules and mostly to reduced temperature differences. Altering the permeate-to-feed ratio of the DCMD module led to a marginal change in the overall production without any enhancement in the compression power consumption. Increasing the MD module length by 50% resulted in a 3% enlargement in the overall production rate and a 10% reduction in power consumption. A modified hybrid structure that additionally utilizes the distillate heat is sought. A 5% increase in water production at the expense of a 45% rise in the specific compression energy of the modified structure over the original hybrid system is obtained.https://www.mdpi.com/2077-0375/15/3/69water desalinationmechanical vapor compressionmembrane distillationhybridelectrical energy consumption |
| spellingShingle | Emad Ali Jamel Orfi Salim Mokraoui Hybrid Mechanical Vapor Compression and Membrane Distillation System: Concept and Analysis Membranes water desalination mechanical vapor compression membrane distillation hybrid electrical energy consumption |
| title | Hybrid Mechanical Vapor Compression and Membrane Distillation System: Concept and Analysis |
| title_full | Hybrid Mechanical Vapor Compression and Membrane Distillation System: Concept and Analysis |
| title_fullStr | Hybrid Mechanical Vapor Compression and Membrane Distillation System: Concept and Analysis |
| title_full_unstemmed | Hybrid Mechanical Vapor Compression and Membrane Distillation System: Concept and Analysis |
| title_short | Hybrid Mechanical Vapor Compression and Membrane Distillation System: Concept and Analysis |
| title_sort | hybrid mechanical vapor compression and membrane distillation system concept and analysis |
| topic | water desalination mechanical vapor compression membrane distillation hybrid electrical energy consumption |
| url | https://www.mdpi.com/2077-0375/15/3/69 |
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