Experimental Investigation of Flow Rate and Concentration Effects of Graphene-Water Nanofluid and Finding the Optimal Conditions Using Taguchi Method

Document Type : Research Article

Authors

Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

In this paper, graphene nanoplate was stabilized in a water-based fluid by sodium dodecyl sulfate as a surfactant. The prepared nanofluid in weight percentages of 0.01 -0.145 was placed in a gasket plate heat exchanger in the presence of cold fluid (deionized water). All experiments were performed for laminar flow in the range of Reynolds numbers of 500-1500. The effect of flow rate and concentration of nanofluid was investigated on the overall coefficient of heat transfer and pressure drop. The concentration increase causes both to increase at the same time. As a result, heat exchange efficiency and thermal effectiveness of the nanofluid were also analyzed. The highest thermal effectiveness (89%) and efficiency (1.244) occur at a minimum flow rate (2 liters per minute) and maximum weight percentage (0.145) Taguchi method was used to find the optimal conditions and confirm the validity of the experiments. It was also found that the decrease in the flow rate (98.56%) has a greater effect on the results of thermal effectiveness than the increase in concentration (0.404%). The error rate was 0.018%, which shows the accuracy of the results.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 54, Issue 3
June 2022
Pages 629-648

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