RT Journal Article
T1 Experimental methodology to determine thermal conductivity of nanofluids by using a commercial transient hot-wire device
A1 Iglesias Prado, José Ignacio
A1 Calviño Barreiro, Uxía
A1 Lugo Latas, Luis
K1 2213.02 Física de la Transmisión del Calor
K1 2204 Física de Fluidos
K1 2213 Termodinámica
AB The lack of a standard experimental procedure to determine thermal conductivity of fluids is noticeable in heat transfer processes from practical and fundamental perspectives. Since a wide variety of techniques have been used, reported literature data have huge discrepancies. A common practice is using manufactured thermal conductivity meters for nanofluids, which can standardize the measurements but are also somewhat inaccurate. In this study, a new methodology to perform reliable measurements with a recent commercial transient hot-wire device is introduced. Accordingly, some extensively studied fluids in the literature (water, ethylene glycol, ethylene glycol:water mixture 50:50 vol%, propylene glycol, and n-tetradecane) covering the range 0.100 to 0.700 W m−1 K−1 were used to check the device in the temperature range 283.15 to 333.15 K. Deviations between the collected data and the theoretical model, and repeatabilities and deviations between reported and literature values, were analyzed. Systematic deviations in raw data were found, and a correction factor depending on the mean thermal conductivity was proposed to operate with nanofluids. Considering all tested effects, the expanded (k = 2) uncertainty of the device was set as 5%. This proposed methodology was also checked with n-hexadecane and magnesium-oxide-based n-tetradecane nanofluids.
PB Applied Sciences
SN 20763417
YR 2021
FD 2021-12-30
LK http://hdl.handle.net/11093/2952
UL http://hdl.handle.net/11093/2952
LA eng
NO Applied Sciences, 12(1): 329 (2021)
NO Ministerio de Ciencia e Innovación | Ref. PID2020-112846RB-C21
DS Investigo
RD 04-dic-2024