News Column

New Findings from Hanyang University Update Understanding of Desalination

May 13, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Research findings on Desalination are discussed in a new report. According to news originating from Gyeonggi Do, South Korea, by VerticalNews correspondents, research stated, "The productivity and specific heat energy consumption of vacuum membrane distillation (VMD) can be enhanced by the appropriate module length because conductive heat transfer through the membrane is negligible. Therefore, this paper suggests the use of a multi-stage vacuum membrane distillation (MVMD) system."

Our news journalists obtained a quote from the research from Hanyang University, "The suggested stages in the MVMD system can be arranged in series or in parallel and/or mixed. The MVMD system is simulated using a one dimensional in-house code with energy and momentum balance and heat and mass transfer equations. The capital cost, maintenance cost, spares cost, and operation cost are considered to evaluate the water product cost. Comprehensive analysis of productivity, the water product cost, and the membrane wetting problem is carried out to find the best configuration in the systems studied. As a result, the mixed MVMD system (which has 20 stages) has the highest productivity (3.79 m(3)/day), lowest water product cost ($1.16/m(3)), and lowest maximum transmembrane pressure difference (93.8 kPa) in the studied configuration. If the MVMD system uses the waste heat source, the water product cost can be reduced to $0.52/m(3)."

According to the news editors, the research concluded: "This value shows the feasibility of using the MVMD system compared with the standard water product cost of $0.63/m(3) for reverse osmosis."

For more information on this research see: Numerical study on multi-stage vacuum membrane distillation with economic evaluation. Desalination, 2014;339():54-67. Desalination can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Desalination -

The news correspondents report that additional information may be obtained from J.G. Lee, Hanyang University, Dept. of Mech Engn, Ansan 426791, Gyeonggi Do, South Korea.

Keywords for this news article include: Asia, Gyeonggi Do, South Korea, Desalination

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Source: Journal of Technology

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