Preparation of Co3O4-H2O nanofluid and application to CR-60 concentrating solar collector
by T.V.R. Sekhar; Ravi Prakash; Gopal Nandan; M. Muthuraman
Progress in Industrial Ecology, An International Journal (PIE), Vol. 11, No. 3, 2017

Abstract: Co3O4-H2O solution along with surfactant is subjected to magnetic stirring and ultra-sonication at 60°C. The obtained homogenous dispersant was divided into four samples of varying volume fractions 0.1vol% to 0.4vol%.Each sample was filled in a metered tank and recirculated in a closed loop solar thermal collector. The setup was subjected to incident solar flux with an average value of 650 W/m2.At a constant fluid flow of 4LPM, the heat transfer coefficient was evaluated for different volume fractions of nanofluid. The obtained values are compared with the values for water as the working fluid. It was observed that at 0.4vol% of nanofluid and 60°C fluid temperature, the heat transfer coefficient increased by 8% when compared to the values for water.

Online publication date: Wed, 18-Apr-2018

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