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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, Skolan för industriell teknik och management (ITM), Energiteknik.
KTH, Skolan för industriell teknik och management (ITM), Energiteknik.ORCID-id: 0000-0002-3661-7016
2017 (engelsk)Inngår i: Desalination and Water Treatment, ISSN 1944-3994, E-ISSN 1944-3986, Vol. 84, s. 123-134Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
Elsevier BV , 2017. Vol. 84, s. 123-134
Emneord [en]
AGMD, Factorial design, Response surface methodology, ANOVA, Solar membrane distillation
HSV kategori
Identifikatorer
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
Forskningsfinansiär
StandUp
Merknad

QC 20171122

Tilgjengelig fra: 2017-11-22 Laget: 2017-11-22 Sist oppdatert: 2026-05-29bibliografisk kontrollert
Inngår i avhandling
1. Integration of Membrane Distillation and Solar Thermal Systems for Coproduction of Purified Water and Heat
Åpne denne publikasjonen i ny fane eller vindu >>Integration of Membrane Distillation and Solar Thermal Systems for Coproduction of Purified Water and Heat
2017 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

In the Middle East and North Africa region fresh water resources are very scarce and theexisting sources are depleting rapidly. Desalination is the method to fulfill increasing waterdemand, and people depend mostly upon bottled water for drinking purposes. Bottledwater is resource and energy demanding, hence there is a need for supplying drinkablewater in a sustainable way. The main objective of this research is to develop solutions forproviding potable water to urban communities through integrating membrane distillationwater purification units with solar driven hot water installations. A single-cassette Air GapMembrane Distillation (AGMD) unit was tested on laboratory scale to investigate theinfluence of various operating parameters on the distillate production. Particular attentionwas given for identifying process conditions relevant to the design of solar energyintegrated systems. In parallel, a simplified empirical model using response surfacemethods was developed and validated against bench scale experimental results. Thedeveloped model for performance indicators was later employed in dynamic simulations ofa solar thermal integrated membrane distillation system. A pilot plant was designed andinstalled at RAK Research and Innovation Center in UAE. Experimental investigations wereconducted on this integrated system for co-production of pure water (around 15-25 l/day)along with hot water production equivalent to the needs of a family of five. A dynamicsimulation model was developed in TRNSYS to analyze optimum operating conditions ofthe system. Economic analysis showed an impressive payback period and savings for theintegrated system as compared with standalone counterparts. A second pilot facility using alarger multi-cassette AGMD module and absorption cooler was designed and installed.Performance of this solar co-production system for heat, cooling, and pure water is analyzedfor various integration modes.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2017. s. 100
Serie
TRITA-KRV ; 17-10
Emneord
Solar Membrane Distillation, polygeneration, TRNSYS, Integrated systems
HSV kategori
Forskningsprogram
Energiteknik
Identifikatorer
urn:nbn:se:kth:diva-232854 (URN)978-91-7729-581-5 (ISBN)
Disputas
2017-12-12, Kollegiesalen, Brinellvägen 8, KTH Royal Institute of Technology, Stockholm, 13:00 (engelsk)
Opponent
Veileder
Merknad

QC 20180806

Tilgjengelig fra: 2018-08-06 Laget: 2018-08-05 Sist oppdatert: 2022-06-26bibliografisk kontrollert

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