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dc.contributor.authorChen, Zhonghua
dc.contributor.authorNguyen, Quang Hong
dc.contributor.authorBoström, Tobias
dc.date.accessioned2018-06-06T16:09:30Z
dc.date.available2018-06-06T16:09:30Z
dc.date.issued2015
dc.description.abstractThe use of multi-walled carbon nanotubes (MWCNTs) as spectrally selective solar thermal absorbers (SSA) in solar thermal collectors is presented in this paper. CNT layers were coated by electrophoretic deposition (EPD) on aluminum substrates. Stable aqueous CNT suspensions consisted of multi-walled CNTs, DI water and surfactant was used for EPD. The deposited samples were heat treated in a tube oven before any analysis. Various thicknesses and compositions of homogenous CNT coatings were prepared by tuning the electrophoretic parameters, such as voltage, inter-electrode spacing and deposition time. EPD proved to be a simple, feasible and environment-friendly process of fabricating SSA and has low chemical consumption. In order to achieve homogenous and good quality CNT films an EPD voltage of at least 15V has to be used. The effect of thickness and heat treatment of CNT coatings on the solar absorptance and thermal emittance was investigated. With thicker CNT coating, the absorption of SSA increased in both visible and IR spectral range. The results have indicated CNTs as a promising material for SSA. Different peak temperatures and the dwell time at the peak temperature during the heat treatment were applied to understand the effect. Higher heat treatment peak temperatures resulted in a lower thermal emittance without decreasing the solar absorptance; hence the spectral selectivity of CNT absorbers was improved. The same effect has been seen for longer dwell time at the heat treatment peak temperature.en_US
dc.description.sponsorshipThis work was supported by Nano2021 program of the research council of Norway and the company ASV Solar AS.en_US
dc.descriptionLink to publisher's version: <a href=http://proceedings.ises.org/?doi=eurosun.2014.03.05>Proceedings Eurosun 2014</a> <p> Open Access policy: <a href=http://proceedings.ises.org/>ISES Conference Proceedings publishing information</a>en_US
dc.identifier.citationChen Z, Nguyen QH, Boström TK. Carbon Nanotube Spectrally Selective Solar Absorbers. Proceedings of the ISES EuroSun 2014 Conference; 2015, p.806-13en_US
dc.identifier.cristinIDFRIDAID 1288091
dc.identifier.doi10.18086/eurosun.2014.03.05
dc.identifier.issn1015-9800
dc.identifier.urihttps://hdl.handle.net/10037/12842
dc.language.isoengen_US
dc.publisherInternational Solar Energy Society (ISES)en_US
dc.relation.journalEurosun
dc.relation.projectIDNorges forskningsråd: 219161en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Teknologi: 500::Miljøteknologi: 610en_US
dc.subjectVDP::Technology: 500::Environmental engineering: 610en_US
dc.subjectSolar energy technologyen_US
dc.titleCarbon Nanotube Spectrally Selective Solar Absorbersen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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