Performance optimisation of upward spray flash desalination using Ocean Thermal Energy
This study presents a theoretical analysis of the upward spray flash desalination systems (SFDS). The design and optimisation of the upward SFDS are analysed by the method of steepest descent. The ratio of power consumption to the amount of freshwater per unit time is used as the objective function...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Desalination and Water Treatment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398625003297 |
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| Summary: | This study presents a theoretical analysis of the upward spray flash desalination systems (SFDS). The design and optimisation of the upward SFDS are analysed by the method of steepest descent. The ratio of power consumption to the amount of freshwater per unit time is used as the objective function (γD). Numerical results are reported for the desalination rate of 1000 tons per day using a plate-type heat exchanger. The seawater temperature profiles of Ocean Thermal Energy Conversion (OTEC) potential sites in Malaysia are used in the design conditions. The relationship between the SFDS γD and the inlet temperature difference of warm and cold seawater is established. The results indicate that the value of the minimum γD decreases as the inlet temperature difference between the warm seawater and cold seawater increases. Furthermore, improved and optimised designs of the SFDS are observed when the seawater temperature differences are greater. Specifically, a more compact size of the desalination condenser and with only a slight but negligible increase in flash chamber size. The findings presented in this study provide a detailed evaluation of the design and optimisation of upward SFDS for effective desalination. |
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| ISSN: | 1944-3986 |