Nanofluids-based and porous media-based solar evaporation: A comparative study

Aimen Zeiny, Dongsheng Wen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Water vaporization through direct volumetric solar collectors has recently attracted a significant attention of the scientific research community. Many studies suggested plasmonic nanoparticles, such as gold nanoparticles, to produce solar clean water effectively. However, there is a lack of studies comparing the feasibility of using gold nanoparticles for solar applications with other cheap materials at the same operating conditions. In this study, well-controlled experiments were performed to clarify the mechanism of the solar evaporation process using gold nanofluids and micro-sized porous medium. The results show that gold nanofluids are not feasible for solar evaporation applications especially solar still technologies. This infeasibility is mainly due to the high cost and the low absorbance of gold nanofluids comparing to the porous medium. High nanofluid concentration is needed to trap the solar energy in a thin layer at the liquid-gaseous interface. Using carbon-based, micro-sized thin porous medium produces solar water vapour at higher rates than that produced by gold nanofluids. Also, increasing the solar intensity enhances the evaporation rates, but unavoidably reduces the efficiency due to the increase in the heat losses related to the accompanied high temperatures.

Original languageEnglish
Title of host publicationTechnologies and Materials for Renewable Energy, Environment and Sustainability, TMREES 2019
EditorsChafic-Touma Salame, Auday Hattem Shaban, Panagiotis Papageorgas, Michel Aillerie
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735418639
DOIs
StatePublished - 17 Jul 2019
Externally publishedYes
EventInternational Conference on Technologies and Materials for Renewable Energy, Environment and Sustainability 2019, TMREES 2019 - Beirut, Lebanon
Duration: 10 Apr 201912 Apr 2019

Publication series

NameAIP Conference Proceedings
Volume2123
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceInternational Conference on Technologies and Materials for Renewable Energy, Environment and Sustainability 2019, TMREES 2019
Country/TerritoryLebanon
CityBeirut
Period10/04/1912/04/19

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