Energy Consumption for Brine Solution Recovery in Direct Contact Membrane Distillation

Abstract:

Direct contact membrane distillation (DCMD) process was applied for brine solution recovery. The energy consumption of the process was evaluated as varying feed temperature and cross flow velocity (CFV). The evaporation efficiency and energy consumption were also studied. The experiments was carried out using a hollow fiber PVDF membrane with pore size of 0.1 μm and NaCl 3.5 %wt as feed solution. The operating feed temperature and CFV were in range of 40 °C-70 °C and 0.14-0.42 m/s (laminar and transition flow region), respectively. The temperature and CFV of permeate were fixed at 20 °C and 1.97 m/s respectively. It was found that the flux rate was in function with the temperature, CFV and temperature polarization coefficient (TPC). The best result in terms of energy consumption and evaporation efficiency were obtained at CFV and temperature of 0.28 m/s and 70 °C about 188.6 W and 41.1 %, respectively.

• Periodical: Advanced Materials Research (Volumes 931-932)
• Pages: 256-260
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.931-932.256
• Online since: May 2014
• Authors: Sothyreak Chhun*, Watsa Khongnakorn, Wirote Youravong
• Keywords: Direct Contact Membrane Distillation, Energy Consumption (EC), Evaporation Efficiency, Hollow Fiber Membrane, Temperature Polarization Coefficient

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