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Experimental modeling of an air-gap membrane distillation module and simulation of a solar thermal integrated system for water purification
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.ORCID iD: 0000-0002-3661-7016
2017 (English)In: Desalination and Water Treatment, ISSN 1944-3994, E-ISSN 1944-3986, Vol. 84, p. 123-134Article in journal (Refereed) Published
Abstract [en]

Membrane distillation is a novel process that could be adapted effectively for many water purification applications. In recent years, several bench, pilot and commercial scale membrane distillation systems with production capacities ranging from 20 L/d to 50 m(3)/d were developed and tested. In this work, a single cassette air-gap membrane distillation (AGMD) module was characterized to identify the effect of process parameters on distillate flux and thermal efficiency. Favorable conditions to obtain distillate flow rate of 1.5-3 kg/h were determined on a bench scale experimental setup. Factorial design of experiments was conducted and response surface methodology (RSM) was applied to develop an empirical regression model relating operating parameters with AGMD system performance indicators. Operating parameters including hot feed inlet temperature (T-Hin), cold feed inlet temperature (T-Cin), feed flow rate (V-f) and feed conductivity (C-f) were considered. Distillate flux (J(d)) and specific performance ratio (SPR) were selected as the performance indicators for the modeling. The developed regression model using RSM was tested by analysis of variance. Regression analysis showed agreement with the experimental data fitted with second-order polynomial model having determination coefficient (R-2) values of 0.996 and 0.941 for J(d) and SPR, respectively. Numerical optimization has been carried out to identify optimal set of operating conditions for achieving desired operation. Also, dynamic simulation of the membrane distillation module integrated solar thermal system has been reported along with validation of the system model by comparing with the experimental data obtained from a pilot scale setup located in UAE.

Place, publisher, year, edition, pages
DESALINATION PUBL , 2017. Vol. 84, p. 123-134
Keyword [en]
AGMD, Factorial design, Response surface methodology, ANOVA, Solar membrane distillation
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-217068DOI: 10.5004/dwt.2017.21201ISI: 000412880600013Scopus ID: 2-s2.0-85031296454OAI: oai:DiVA.org:kth-217068DiVA, id: diva2:1159392
Note

QC 20171122

Available from: 2017-11-22 Created: 2017-11-22 Last updated: 2018-03-12Bibliographically approved

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Kumar, Nutakki Tirumala UdayMartin, Andrew R.

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