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Performance, energy and economic investigation of airgap membrane distillation system: An experimental and numerical investigation

Gopi, G. and Vasanthkumar, M. and Arthanareeswaran, G. and Ismail, A. F. and Thuyavan, Y. Lukka and Goh, P. S. and Matsuura, T. (2023) Performance, energy and economic investigation of airgap membrane distillation system: An experimental and numerical investigation. Desalination, 551 (NA). NA-NA. ISSN 0011-9164

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Official URL: http://dx.doi.org/10.1016/j.desal.2023.116400

Abstract

Airgap membrane distillation (AGMD) is an efficient configuration employed widely for the solar membrane distillation desalination process. In the present work, 1-D Knudsen and molecular transport (KMT) model has been developed to investigate the performance of the flat sheet PVDF membrane. A new solution algorithm for the co-current and counter-current flow regime has been designed to solve the heat and mass transfer equations iteratively for a single-stage AGMD module. The feed temperature, feed flow rate, airgap size, salinity, membrane porosity and module length were varied and compared with experimental results. The increase in feed temperature from 40 °C to 80 °C resulted in 10.38 times increase in flux for co-current flow and 11.05 times for counter-current flow. The maximum permeate flux at 80 °C was 8.668 kg/m2h and 8.871 kg/m2h for the co-current and counter-current processes, respectively. Optimizing the feed temperature, flow rate, and membrane length using RSM suggests 80 °C, 1.528 LPM and 10 m as the optimum operating condition. An AGMD module of size 0.8 m width and 10 m length under the optimum operating condition exhibited a freshwater yield of 8.73 kg/h by consuming 24.98 kWh/m3 of specific energy, and the water production cost would be around $2.25/m3.

Item Type:Article
Uncontrolled Keywords:Airgap membrane distillation, Co-current process flow regime, Counter-current process, KMT model, PVDF membrane, Response surface method
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:106557
Deposited By: Widya Wahid
Deposited On:09 Jul 2024 06:55
Last Modified:09 Jul 2024 06:55

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