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The potential of solar-driven humidification-dehumidification desalination for small-scale decentralized water production

Author(s)
Narayan, G. Prakash; El Sharqawy, Mostafa Hamed Ahm; Summers, Edward K.; Lienhard, John H.; Zubair, Syed M.; Antar, Mohamed Abdelkerim; ... Show more Show less
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Abstract
World-wide water scarcity, especially in the developing world, indicates a pressing need to develop inexpensive, decentralized small-scale desalination technologies which use renewable resources of energy. This paper provides a comprehensive review of the stateof- the-art in one of the most promising of these technologies, solar-driven humidification-dehumidification (HDH) desalination. Previous studies have investigated many different variations on the HDH cycle. In this paper, performance parameters which enable comparison of the various versions of the HDH cycle have been defined and evaluated. To better compare these cycles, each has been represented in psychometric coordinates. The principal components of the HDH system are also reviewed and compared, including the humidifier, solar heaters, and dehumidifiers. Particular attention is given to solar air heaters, for which design data is limited; and direct air heating is compared to direct water heating in the cycle assessments. Alternative processes based on the HDH concept are also reviewed and compared. Further, novel proposals for improvement of the HDH cycle are outlined. It is concluded that HDH technology has great promise for decentralized small-scale water production applications, although additional research and development is needed for improving system efficiency and reducing capital cost.
Date issued
2009-12
URI
http://hdl.handle.net/1721.1/52624
Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Renewable and Sustainable Energy Reviews (Online)
Publisher
Elsevier
Citation
Narayan, G. Prakash et al. “The potential of solar-driven humidification-dehumidification desalination for small-scale decentralized water production.” Renewable and Sustainable Energy Reviews 14.4 (2010): 1187-1201.
Version: Author's final manuscript
Keywords
humidification, dehumidification, desalination, decentralized water production, solar power, small-scale water production

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