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Design Parameters of a Direct Contact Membrane Distillation and a Case Study of Its Applicability to Low-Grade Waste Energy

Authors
Tewodros, Bitaw NigatuYang, Dae RyookPark, Kiho
Issue Date
Dec-2022
Publisher
MDPI
Keywords
desalination; membrane distillation; DCMD; low-grade energy; hybrid
Citation
MEMBRANES, v.12, no.12
Indexed
SCIE
SCOPUS
Journal Title
MEMBRANES
Volume
12
Number
12
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/175837
DOI
10.3390/membranes12121279
ISSN
2077-0375
2077-0375
Abstract
In the design of membrane distillation systems, the effect of different heat transfer coefficient models on the transmembrane flux seems to have been overlooked thus far. Interestingly, the range of discrepancy in the results of the transmembrane flux is wide, especially in the laminar flow region, where MD is often operated. This can be inferred by studying the design and parameters of the direct contact membrane distillation system. In this study, the physical and physiochemical properties that affect the design of MD are comprehensively reviewed, and based on the reviewed parameters, an MD design algorithm is developed. In addition, a cost analysis of the designed MD process for low-grade-energy fluids is conducted. As a result, a total unit product cost of USD 1.59/m(3), 2.69/m(3), and 15.36/m(3) are obtained for the feed velocities of 0.25, 1 and 2.5 m/s, respectively. Among the design parameters, the membrane thickness and velocity are found to be the most influential.
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