Journal
FRONTIERS IN ENERGY
Volume 12, Issue 2, Pages 297-304Publisher
HIGHER EDUCATION PRESS
DOI: 10.1007/s11708-017-0478-2
Keywords
reverse osmosis (RO) desalination; tidal energy; model; economic evaluation
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Funding
- Key Laboratory of Ocean Renewable Energy and Sea Water Desalination of Science and Technology Special Project of Zhanjiang City of China [2013A06008]
- Science and Technology Project of Guangdong Province of China [2011B010100033]
- Science and Technology Development Project in Ocean and Fishery of Guangdong Province of China [A201301D01]
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A reverse osmosis (RO) desalination system coupled with tidal energy is proposed. The mechanical energy produced by the tidal energy through hydraulic turbine is directly used to drive the RO unit. The system performances and the water cost of the conventional and tidal energy RO systems are compared. It is found that the proposed tidal energy RO system can save water cost in the range of 31.0%-41.7% in comparison with the conventional RO system. There is an optimum feed pressure that leads to the lowest water cost. The tidal RO system can save more costs at a high feed pressure or a high water recovery rate. The optimum feed pressure of the tidal energy RO system is higher than that of the conventional RO system. The longer lifetime of the tidal energy RO system can save even more water cost. When the site development cost rate is lower than 40%, the water cost of the tidal energy RO system will be lower than that of the conventional RO system. The proposed technology will be an effective alternative desalination method in the future.
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