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Heat transfer coefficients and yield analysis of a double-slope solar still hybrid with rubber scrapers: an experimental and theoretical study


Citation

Al-Sulttani, Ali Omran Muhsin and Ahsan, Amimul and Rahman, Ataur and Nik Daud, Nik Norsyahariati and Idrus, Syazwani (2017) Heat transfer coefficients and yield analysis of a double-slope solar still hybrid with rubber scrapers: an experimental and theoretical study. Desalination and Water Treatment, 407. 61 - 74. ISSN 1944-3994; ESSN: 1944-3986

Abstract / Synopsis

In this study, a new double-slope solar still hybrid with rubber scrapers (DSSSHS) and a double-slope solar still (DSSS) were designed, manufactured and tested. The proposed design of DSSSHS makes use of the advantages of using a small slope of the condensing cover of the still that allows higher solar radiation to enter into the still. Disadvantages resulting from using the small slope are overcome by using the rubber scrapers. No researcher has yet used the scrapers in solar still. Experimental measurements and results were used to calculate the theoretical values of convective and evaporative heat transfer coefficients, in addition to the theoretical values of the yields. Results of the two models were compared to evaluate the advantages of using rubber scrapers in the new model. Using rubber scrapers in DSSSHS model enhanced the total internal heat transfer coefficient (h1) as well as the productivity. The maximum recorded value of the total internal heat transfer coefficient for the DSSSHS is found as 38.754 W/m2 °C and the daily yield as 4.24 L/m2 day with productivity improvement of 63%, for the case when the inclination angle of the glass cover is quite small (about 3.0°).


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Institute of Advanced Technology
DOI Number: https://doi.org/10.1016/j.desal.2016.12.017
Publisher: Taylor & Francis
Keywords: Double-slope; Rubber scrapers; Hybrid solar still; Heat transfer coefficient; Yields
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 18 Mar 2019 10:11
Last Modified: 18 Mar 2019 10:11
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi10.1016/j.desal.2016.12.017
URI: http://psasir.upm.edu.my/id/eprint/62015
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