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Entropy and Thermodynamics in Desalination Systems II

A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Thermodynamics".

Deadline for manuscript submissions: closed (15 August 2021) | Viewed by 2820

Special Issue Editors


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Guest Editor
School of Engineering, College of Engineering and Physical Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
Interests: geothermal energy; solar energy; transport in porous media; heat and mass transfer; waste energy recovery; CFD; design optimization
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Guest Editor
Mechanical Engineering Department, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia
Interests: water desalination; energy and exergy analysis; heat and mass exchangers; solar energy systems; design of thermal systems

Special Issue Information

Dear Colleagues,

Desalination systems consume large amounts of energy to separate pure water from dissolved matter. Whatever the separation method used to desalinate water, there is a large amount of entropy generation due to irreversibility in each process. Reducing entropy generation will decrease the energy consumed in the desalination process. Energy and exergy analyses, as well as entropy generation minimization, are vital thermodynamic tools in the design and analysis of desalination systems. This Special Issue specifically emphasizes research that addresses entropy generation and the thermodynamic analysis of desalination systems, by presenting an analysis of novel desalination processes, improved performance, new techniques, such as fog harvesting, water from thin air, and desalination by freezing. Other disciplines are also welcome, such as salinity gradient energy, energy recovery devices in desalination systems, optimization, and entropy generation minimization.

Prof. Mostafa H. Elsharqawy
Prof. Dr. Mohamed Antar
Guest Editors

Manuscript Submission Information

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Keywords

  • entropy generation in thermal and membrane-based desalination systems
  • entropy generation in renewable desalinaiton systems
  • entropy generation minimization in desalination systems
  • entropy generation mechanisms in desalination
  • energy and exergy analyses of desalination systems
  • optimization, single and multistage, performance assessment

Published Papers (1 paper)

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Research

15 pages, 2292 KiB  
Article
Energy and Entropy Analyses of a Pilot-Scale Dual Heating HDH Desalination System
by Dahiru U. Lawal, Saad Abdul Jawad, Mostafa H. Sharqawy and Mohamed A. Antar
Entropy 2021, 23(10), 1282; https://doi.org/10.3390/e23101282 - 30 Sep 2021
Cited by 2 | Viewed by 2126
Abstract
This study focuses on energy and entropy analysis to theoretically investigate the performance of a pilot scale dual heated humidification-dehumidification (HDH) desalination system. Two cases of HDH systems are considered in the analysis. The first case is a dual heated (DH) cycle consisting [...] Read more.
This study focuses on energy and entropy analysis to theoretically investigate the performance of a pilot scale dual heated humidification-dehumidification (HDH) desalination system. Two cases of HDH systems are considered in the analysis. The first case is a dual heated (DH) cycle consisting of 1.59 kW air heater and 1.42 kW water heater with a heat rate ratio of 0.89 (CAOW-DH-I). Whereas the second case is a dual heated HDH cycle comprising of 1.59 kW air heater and 2.82 kW water heater with a heat rate ratio of 1.77 (CAOW-DH-II). As a first step, mathematical code was developed based on heat and mass transfer and entropy generation within the major components of the system. The code was validated against the experimental data obtained from a pilot scale HDH system and was found to be in a good agreement with the experimental results. Theoretical results revealed that there is an optimal mass flowrate ratio at which GOR is maximized, and entropy generation is minimized. Furthermore, the degree of irreversibility within the humidifier component is low and approaches zero, while the specific entropy generation within other components are relatively high and are of the same order of magnitude. Entropy analysis also showed that the dual heated system with heat rate ratio greater than unity is better than the one with heat rate ratio less than unity. Full article
(This article belongs to the Special Issue Entropy and Thermodynamics in Desalination Systems II)
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