Karafan Journal

Karafan Journal

Investigation of the Effects of Hybrid Nanofluids Containing Graphene on the Hydrothermal Performance of a Solar Linear Parabolic Collector

Document Type : Original Article

Author
B.Sc. Student, Department of Engineering Sciences, Faculty of Technology and Engineering, Guilan, Iran.
Abstract
The In this research, theoretically and using MATLAB software, the hydrothermal performance of a linear parabolic collector with the use of hybrid nanofluids containing graphene was investigated and compared with mono nanofluids and base fluid. In this study, the fluid flow was assumed to be turbulent, steady and incompressible. Syltherm 800 oil with a volume fraction of 2% and a ratio of 50:50 was selected as the base fluid. To obtain more accurate results, its thermophysical properties were considered dependent on temperature. The results of this study showed that at a temperature of 300 K, the use of mono nanofluids and hybrid nanofluids containing graphene improves energy efficiency on average by respectively 2.2% and 2.92% compared to the base fluid.‌ The improvement percentage of the Nusselt number and convection heat transfer coefficient were 41.30% and 49.95% for mono nanofluids and 109.13% and 121.89% for hybrid nanofluids containing graphene, respectively. The highest and lowest improvement on parameters of energy efficiency, Nusselt number and convection heat transfer coefficient among hybrid nanofluids containing graphene were obtained respectively for graphene -copper-Syltherm800andgraphene-silver-Syltherm800.In addition,‌ theaveragevalue‌ of hydrothermal performance for mono nanofluids and hybrid nanofluids containing graphene was respectively 1.24 and 1.75. These values indicate the usefulness and improvement of heat transfer using hybrid nanofluids containing graphene in the base fluid.
Keywords
Subjects

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Volume 21, Issue 1 - Serial Number 66
Engineering & Technical
Spring 2024
Pages 297-319

  • Receive Date 05 November 2023
  • Revise Date 17 March 2024
  • Accept Date 12 May 2024