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Theoretical and experimental investigation of a novel multistage evacuated solar still

Abakr, Yousif A. and Ismail, Ahmad Faris (2005) Theoretical and experimental investigation of a novel multistage evacuated solar still. Journal of Solar Energy Engineering, 127 (3). pp. 381-385. ISSN 0199 - 6231

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Abstract

Solar desalination is an ideal source of fresh water for both drinking and agriculture. A lot of research was conducted on solar desalination systems, but most of the available systems have low production, are expensive, and are not reliable for long term use. In this work a new multistage evacuated solar desalination system was proposed and designed.The objective of this work is to increase the productivity and improve the low efficiency of the traditional solar desalination systems. The new system works by virtue of the higher evaporation rate under vacuum condition inside the solar still. A model for the system was developed and used to optimize the system design. The new model was subjected to a Finite Element Analysis (FEA) structural analysis using MSC/NASTRAN™ FEA software. A Computational Fluid Dynamics (CFD) simulation of the evaporation and condensation process inside one stage of the new solar still was conducted using FLUENT™ software. The system prototype was fabricated and tested at the actual outdoor ambient conditions for a period of 3 months. The productivity of this new system was found to be 14.2 kg/m2/day, which is about threefold of the maximum productivity of the basin type solar still. The cost of produced still water is estimated as 0.20 US$/gal. The results show that the multi-stage evacuated solar still might be a good option as a solar desalination system.

Item Type: Article (Journal)
Additional Information: 1743/31490
Uncontrolled Keywords: Solar, Desalination, Evacuated, Multistage, FEA, CFD
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User: Prof Dr Ahmad Faris Ismail
Date Deposited: 23 Sep 2013 15:35
Last Modified: 23 Sep 2013 15:35
URI: http://irep.iium.edu.my/id/eprint/31490

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