Experimental & modeling studies on novel scraped surface falling film crystallizer for freeze desalination
Freeze Desalination (FD) is a low-temperature thermal desalination technique that utilizes the freezing process to form and harvest ice crystals from saline water for production of fresh water. FD consumes seven times less energy than evaporation-based desalination processes in addition to lesser co...
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| Language: | English |
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Elsevier
2025-01-01
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| Series: | Desalination and Water Treatment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398624204379 |
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| author | Mayank Soni Saurabh A. Raha A.Shriniwas Rao A.K. Adak |
| author_facet | Mayank Soni Saurabh A. Raha A.Shriniwas Rao A.K. Adak |
| author_sort | Mayank Soni |
| collection | DOAJ |
| description | Freeze Desalination (FD) is a low-temperature thermal desalination technique that utilizes the freezing process to form and harvest ice crystals from saline water for production of fresh water. FD consumes seven times less energy than evaporation-based desalination processes in addition to lesser corrosion and scaling issues. However, its commercial implementation is limited by issues like incomplete salt removal and scaling of heat transfer surfaces due to formation of ice layer. Recently, the availability of 'cold energy' at −162 °C during regasification of Liquified Natural Gas (LNG) has increased the potential for application of FD at LNG terminals, particularly in coastal areas facing water scarcity. This paper introduces a new equipment. the Scraped Surface Falling Film Crystallizer (SSFFC), specifically developed for the FD process. The SSFFC uses falling film freeze crystallization and an in-situ mechanism for harvesting ice crystal through scraping and filtration. Experiments were conducted using brackish water to evaluate the performance of the SSFFC unit, focusing on ice production and salt rejection across various feed salinities and coolant temperatures. The unit achieved ice production rates of 2.7 kg/h and 3.9 kg/h with coolant temperatures of −9 °C and −12 °C, respectively, for a feed salinity of 10,000 ppm. A mathematical model of the SSFFC unit was developed, validated with experimental results and used in parametric studies to explore the effect of varying operating conditions on its performance. |
| format | Article |
| id | doaj-art-c013bd9c88084cbfa64d0d41c73db620 |
| institution | DOAJ |
| issn | 1944-3986 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Desalination and Water Treatment |
| spelling | doaj-art-c013bd9c88084cbfa64d0d41c73db6202025-08-20T02:45:50ZengElsevierDesalination and Water Treatment1944-39862025-01-0132110092710.1016/j.dwt.2024.100927Experimental & modeling studies on novel scraped surface falling film crystallizer for freeze desalinationMayank Soni0 Saurabh1A. Raha2A.Shriniwas Rao3A.K. Adak4Desalination & Membrane Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, IndiaDesalination & Membrane Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, IndiaDesalination & Membrane Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India; Corresponding author.Chemical Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, IndiaDesalination & Membrane Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, IndiaFreeze Desalination (FD) is a low-temperature thermal desalination technique that utilizes the freezing process to form and harvest ice crystals from saline water for production of fresh water. FD consumes seven times less energy than evaporation-based desalination processes in addition to lesser corrosion and scaling issues. However, its commercial implementation is limited by issues like incomplete salt removal and scaling of heat transfer surfaces due to formation of ice layer. Recently, the availability of 'cold energy' at −162 °C during regasification of Liquified Natural Gas (LNG) has increased the potential for application of FD at LNG terminals, particularly in coastal areas facing water scarcity. This paper introduces a new equipment. the Scraped Surface Falling Film Crystallizer (SSFFC), specifically developed for the FD process. The SSFFC uses falling film freeze crystallization and an in-situ mechanism for harvesting ice crystal through scraping and filtration. Experiments were conducted using brackish water to evaluate the performance of the SSFFC unit, focusing on ice production and salt rejection across various feed salinities and coolant temperatures. The unit achieved ice production rates of 2.7 kg/h and 3.9 kg/h with coolant temperatures of −9 °C and −12 °C, respectively, for a feed salinity of 10,000 ppm. A mathematical model of the SSFFC unit was developed, validated with experimental results and used in parametric studies to explore the effect of varying operating conditions on its performance.http://www.sciencedirect.com/science/article/pii/S1944398624204379Freeze Desalination (FD)Liquefied Natural Gas (LNG)Scraped Surface Falling Film Crystallizer (SSFFC) |
| spellingShingle | Mayank Soni Saurabh A. Raha A.Shriniwas Rao A.K. Adak Experimental & modeling studies on novel scraped surface falling film crystallizer for freeze desalination Desalination and Water Treatment Freeze Desalination (FD) Liquefied Natural Gas (LNG) Scraped Surface Falling Film Crystallizer (SSFFC) |
| title | Experimental & modeling studies on novel scraped surface falling film crystallizer for freeze desalination |
| title_full | Experimental & modeling studies on novel scraped surface falling film crystallizer for freeze desalination |
| title_fullStr | Experimental & modeling studies on novel scraped surface falling film crystallizer for freeze desalination |
| title_full_unstemmed | Experimental & modeling studies on novel scraped surface falling film crystallizer for freeze desalination |
| title_short | Experimental & modeling studies on novel scraped surface falling film crystallizer for freeze desalination |
| title_sort | experimental amp modeling studies on novel scraped surface falling film crystallizer for freeze desalination |
| topic | Freeze Desalination (FD) Liquefied Natural Gas (LNG) Scraped Surface Falling Film Crystallizer (SSFFC) |
| url | http://www.sciencedirect.com/science/article/pii/S1944398624204379 |
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