Modeling and unit-cost optimization of a water-heated humidification-dehumidification (HDH) desalination system were presented in previous work of the authors. The system controlled the saline water flow rate to prevent salts from precipitating at higher water temperatures. It was then realized that this scheme had a negative impact on condensation performance when the controlled flow rate was not sufficiently high. This work builds on the previous system by disconnecting the condenser from the saline water cycle and by introducing a solar air heater to further augment the humidification performance. In addition, improved models for the condenser and the humidifier were used to obtain more accurate productivity estimations. The Heuristic Gradient Projection (HGP) optimization procedure was also refactored to result in reduced number of function evaluations to reach the global optimum compared to Genetic Algorithms (GA’s). A case study which assumes a desalination plant on the Red Sea near the city of Hurghada is presented. The unit-cost of produced fresh water for the new optimum system is $0.5/m3 compared to $5.9/m3 for the HDH system from previous work and less than the reported minimum cost of reverse osmoses systems.
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ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 17–20, 2014
Buffalo, New York, USA
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-4631-5
PROCEEDINGS PAPER
Optimum Solar HDH Desalination for Semi-Isolated Communities Using HGP and GA’s
Khalid M. Abd El-Aziz,
Khalid M. Abd El-Aziz
Cairo University, Cairo, Egypt
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Karim Hamza,
Karim Hamza
University of Michigan, Ann Arbor, MI
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Mohamed El Morsi,
Mohamed El Morsi
American University in Cairo, New Cairo, Egypt
Ain Shams University, Cairo, Egypt
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Ashraf O. Nassef,
Ashraf O. Nassef
American University in Cairo, New Cairo, Egypt
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Sayed M. Metwalli,
Sayed M. Metwalli
Cairo University, Cairo, Egypt
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Kazuhiro Saitou
Kazuhiro Saitou
University of Michigan, Ann Arbor, MI
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Khalid M. Abd El-Aziz
Cairo University, Cairo, Egypt
Karim Hamza
University of Michigan, Ann Arbor, MI
Mohamed El Morsi
American University in Cairo, New Cairo, Egypt
Ain Shams University, Cairo, Egypt
Ashraf O. Nassef
American University in Cairo, New Cairo, Egypt
Sayed M. Metwalli
Cairo University, Cairo, Egypt
Kazuhiro Saitou
University of Michigan, Ann Arbor, MI
Paper No:
DETC2014-34598, V02AT03A020; 11 pages
Published Online:
January 13, 2015
Citation
Abd El-Aziz, KM, Hamza, K, El Morsi, M, Nassef, AO, Metwalli, SM, & Saitou, K. "Optimum Solar HDH Desalination for Semi-Isolated Communities Using HGP and GA’s." Proceedings of the ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 2A: 40th Design Automation Conference. Buffalo, New York, USA. August 17–20, 2014. V02AT03A020. ASME. https://doi.org/10.1115/DETC2014-34598
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