Experimental Study on Thermal Efficiency of Parabolic Trough Collector (PTC) Using Al2O3/H2O Nanofluid

E. Siva Reddy; R. Meenakshi Reddy; K. Krishna Reddy

doi:10.4028/www.scientific.net/AMM.787.192

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 787Experimental Study on Thermal Efficiency of...

Experimental Study on Thermal Efficiency of Parabolic Trough Collector (PTC) Using Al₂O₃/H₂O Nanofluid

Abstract:

Dispersing small amounts of solid nano particles into base-fluid has a significant impact on the thermo-physical properties of the base-fluid. These properties are utilized for effective capture and transportation of solar energy. This paper attempts key idea for harvesting solar energy by using alumina nanofluid in concentrating parabolic trough collectors. An experimental study is carried out to investigate the performance of a parabolic trough collector using Al₂O₃-H₂O based nanofluid. Results clearly indicate that at same ambient, inlet temperatures, flow rate, concentration ratio etc. hike in thermal efficiency is around 5-10 % compared to the conventional Parabolic Trough Collector (PTC). Further, the effect of various parameters such as concentration ratio, receiver length, fluid velocity, volume fraction of nano particles has been studied. The different flow rates employed in the experiment are 2 ml/s, 4 ml/s and 6 ml/s. Volumetric concentration of 0.02%, 0.04% and 0.06% has been studied in the experiment. Surfactants are not introduced to avoid bubble formation. Tracking mode of parabolic trough collector is manual. Results also reveal that Al₂O₃-H₂O based nanofluid has higher efficiency at higher flow rates.

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Periodical:

Applied Mechanics and Materials (Volume 787)

Pages:

192-196

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.787.192

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Online since:

August 2015

Authors:

E. Siva Reddy*, R. Meenakshi Reddy, K. Krishna Reddy

Keywords:

Al₂O₃/H₂O Nanofluid, Enhancement of Thermal Conductivity, Flow Rates, Parabolic Trough Collector (PTC), Particle Concentrations, Thermal Efficiency

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