Determination of absorption coefficient of nanofluids with unknown refractive index from reflection and transmission spectra

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dc.contributor.authorKim, Joongbaeko
dc.contributor.authorLee, Seungyoonko
dc.contributor.authorLee, Kyungeunko
dc.contributor.authorLee, Ikjinko
dc.contributor.authorLee, Bong Jaeko
dc.date.accessioned2018-06-16T07:36:22Z-
dc.date.available2018-06-16T07:36:22Z-
dc.date.created2018-06-09-
dc.date.created2018-06-09-
dc.date.created2018-06-09-
dc.date.issued2018-07-
dc.identifier.citationJOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, v.213, pp.107 - 112-
dc.identifier.issn0022-4073-
dc.identifier.urihttp://hdl.handle.net/10203/242521-
dc.description.abstractIt has been shown that the absorption coefficient of a nanofluid can be actively tuned by changing material, size, shape, and concentration of the nanoparticle suspension. In applications of engineered nanofluids for the direct absorption of solar radiation, it is important to experimentally characterize the absorption coefficient of nanofluids in the solar spectrum. If the refractive index of the base fluid (i.e., the solution without nanoparticles) is known a priori, the absorption coefficient of nanofluids can be easily determined from the transmission spectrum. However, if the refractive index of the base fluid is not known, it is not straightforward to extract the absorption coefficient solely from the transmission spectrum. The present work aims to develop an analytical method of determining the absorption coefficient of nanofluids with unknown refractive index by measuring both reflection and transmission spectra. The proposed method will be validated with deionized water, and the effect of measurement uncertainty will be carefully examined. Finally, the general applicability of the proposed method will also be demonstrated for Therminol VP-1 as well as the Therminol VP-1 - graphite nanofluid.-
dc.languageEnglish-
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD-
dc.subjectSOLAR THERMAL-ENERGY-
dc.subjectCONVECTIVE HEAT-TRANSFER-
dc.subjectOPTICAL-CONSTANTS-
dc.subjectTRANSMITTANCE MEASUREMENTS-
dc.subjectOBLIQUE-INCIDENCE-
dc.subjectFILMS-
dc.subjectCONDUCTIVITY-
dc.subjectCOLLECTORS-
dc.subjectENHANCEMENT-
dc.subjectCONVERSION-
dc.titleDetermination of absorption coefficient of nanofluids with unknown refractive index from reflection and transmission spectra-
dc.typeArticle-
dc.identifier.wosid000434001400011-
dc.identifier.scopusid2-s2.0-85046011753-
dc.type.rimsART-
dc.citation.volume213-
dc.citation.beginningpage107-
dc.citation.endingpage112-
dc.citation.publicationnameJOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER-
dc.identifier.doi10.1016/j.jqsrt.2018.04.018-
dc.contributor.localauthorLee, Ikjin-
dc.contributor.localauthorLee, Bong Jae-
dc.contributor.nonIdAuthorLee, Seungyoon-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorAbsorption coefficient-
dc.subject.keywordAuthorNanofluids-
dc.subject.keywordAuthorReflection/transmission spectra-
dc.subject.keywordPlusSOLAR THERMAL-ENERGY-
dc.subject.keywordPlusCONVECTIVE HEAT-TRANSFER-
dc.subject.keywordPlusOPTICAL-CONSTANTS-
dc.subject.keywordPlusTRANSMITTANCE MEASUREMENTS-
dc.subject.keywordPlusOBLIQUE-INCIDENCE-
dc.subject.keywordPlusFILMS-
dc.subject.keywordPlusCONDUCTIVITY-
dc.subject.keywordPlusCOLLECTORS-
dc.subject.keywordPlusENHANCEMENT-
dc.subject.keywordPlusCONVERSION-
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