TY  - JOUR
AV  - none
N1  - cited By 15
SP  - 311
TI  - Characterization and stability analysis of oil-based copper oxide nanofluids for medium temperature solar collectors Charakterisierung und Stabilitätsanalyse von ölbasierten Kupferoxid-Nanofluiden für Mitteltemperatursonnenkollektoren
PB  - Wiley-VCH Verlag
SN  - 09335137
EP  - 319
N2  - Thermal oils are widely used as heat transfer fluids in medium temperature applications. Addition of small amounts of nanoparticles in such fluids can significantly improve their thermophysical properties. This paper presents experimental investigation of an oil-based nanofluids prepared by dispersing different concentrations (0.25 wtâ??1.0 wt) of copper oxide nanoparticles in Therminol-55 oil using two-step method. Shear mixing and ultrasonication were used for uniform distribution and de-agglomeration of nanoparticles to enhance the stability of the suspensions. The effect of nanoparticles concentrations on thermophysical properties of the nanofluids was analysed by measuring thermal conductivity, dynamic viscosity, effective density and specific heat capacity at different temperatures (25 °Câ??130 °C). Thermal conductivity exhibited increasing trend with rising temperature and increase in nanoparticles loading. A significant decrease in dynamic viscosity and effective density against increasing temperature makes it suitable for medium temperature applications. Nano-oils with improved thermal properties are expected to increase the efficiency of concentrating solar thermal collectors. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
IS  - 3
ID  - scholars11729
KW  - Agglomeration; Collector efficiency; Convergence of numerical methods; Copper oxides; Heat transfer; Nanofluidics; Nanoparticles; Specific heat; Viscosity
KW  -  Copper oxide nanofluids; Copper oxide nanoparticles; Experimental investigations; Increasing temperatures; Nano-oil; Rising temperatures; Ultra-sonication; Uniform distribution
KW  -  Thermal conductivity of liquids
Y1  - 2019///
JF  - Materialwissenschaft und Werkstofftechnik
A1  - Akhter, J.
A1  - Gilani, S.I.
A1  - Al-kayiem, H.H.
A1  - Ali, M.
A1  - Masood, F.
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062663290&doi=10.1002%2fmawe.201800220&partnerID=40&md5=d25350028e8653f6cb19c46c6a483641
VL  - 50
ER  -