Air-Heating Solar Collectors for Humidification-Dehumidification Desalination Systems
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Lienhard_Air-heating solar.pdf
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308.16 KB
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Adobe PDF
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Author(s)
Summers, Edward K.
Zubair, Syed M.
Lienhard, John H
Date Issued
February 2011
Journal
Journal of Solar Energy Engineering
Publisher
ASME International
Citation
Summers, Edward K., John H. Lienhard, and Syed M. Zubair. “Air-Heating Solar Collectors for Humidification-Dehumidification Desalination Systems.” J. Sol. Energy Eng. 133, no. 1 (2011): 011016. © 2011 ASME
Version
Final published version
Abstract
Relative to solar water heaters, solar air heaters have received relatively little investigation and have resulted in few commercial products. However, in the context of a humidification-dehumidification (HDH) desalination cycle, air heating accounts for advantages in cycle performance. Solar collectors can be over 40% of an air-heated HDH system’s cost; thus, design optimization is crucial. Best design practices and sensitivity to material properties for solar air heaters are investigated, and absorber solar absorptivity and glazing transmissivity are found to have the strongest effect on performance. Wind speed is also found to have an impact on performance. Additionally a well designed, and likely low cost, collector includes a double glazing and roughened absorber plates for superior heat transfer to the airstream. A collector in this configuration performs better than current collectors with an efficiency of 58% at a normalized gain of 0.06 Km[superscript 2]/W.
MIT Department
Massachusetts Institute of Technology. Abdul Latif Jameel World Water & Food Security Lab
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1115/1.4003295
