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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

HYBRID SOLAR ENERGY/DESALINATION USING SPECTRALLY SELECTIVE MEMBRANE DISTILLATION

Get access (open in a dialog) DOI: 10.1615/IHTC16.nee.023330
pages 7643-7650

要約

In recent years, direct contact membrane distillation (DCMD) has been shown to be more effective for desalination of high-salinity feed streams compared to the more conventional reverse osmosis process. DCMD works by utilizing the vapor pressure difference between a heated feed stream and a colder permeate stream to drive water vapor from the feed side to the permeate side. A noted way of increasing the temperature gradient between the two sides and/or adding heat to the feed side is to directly expose the membrane to solar flux. One approach for absorbing energy within the membrane is through the addition of solar absorbing nanoparticles. While bulk solar absorption can be achieved easily with carbon or graphite, it is also possible to add nanoparticles that selectively absorb limited portions of the solar spectrum. By combining a selective nanoparticle membrane in conjunction with a photovoltaic (PV) cell, it is possible to hybridize water desalination and electrical energy production. The nanoparticles absorb photons below the PV bandgap, decreasing the PV operating temperature, while still permitting power generation. In this paper a hybrid PV-DCMD system is simulated. Results indicate that such a system can supply significant amounts of water flux although increases in water flux must be balanced with decreases in electric energy production.