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

Cited 2 time in webofscience Cited 0 time in scopus
  • Hit : 163
  • Download : 0
It 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.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2018-07
Language
English
Article Type
Article
Keywords

SOLAR THERMAL-ENERGY; CONVECTIVE HEAT-TRANSFER; OPTICAL-CONSTANTS; TRANSMITTANCE MEASUREMENTS; OBLIQUE-INCIDENCE; FILMS; CONDUCTIVITY; COLLECTORS; ENHANCEMENT; CONVERSION

Citation

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, v.213, pp.107 - 112

ISSN
0022-4073
DOI
10.1016/j.jqsrt.2018.04.018
URI
http://hdl.handle.net/10203/242521
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 2 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0