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An Experimental Investigation of the Effects of Using Hexagonal BN–Water Nanofluids on the Thermal Performance and Pressure Drop of a Concentric Tube Heat Exchanger

Author

Listed:
  • Nese Budak Ziyadanogullari

    (Department of Mechanical Engineering, University of Batman, 72100 Batman, Turkey)

  • Suleyman Percin

    (Department of Mechanical Engineering, University of Batman, 72100 Batman, Turkey)

Abstract

The thermal conductivity of recently produced hexagonal boron nitride (hBN)-containing nanofluids is comparatively higher than their viscosity, indicating that these materials belong to a relatively novel class. In this study, hBN–water nanofluids in stable and dispersed concentrations were used in parallel and counterflow experiments at volumes of 0.01%, 0.1%, and 1%, as well as at various flow rates and Reynolds numbers. When employing hBN–water nanofluid in a counter-flow heat exchanger instead of distilled water, the results showed a 16.7% increase in the overall heat transfer coefficient. The findings also showed that, in comparison to a counter-flow heat exchanger, employing hBN nanofluid as the cold fluid in a parallel-flow heat exchanger produced superior results in terms of an increase in heat transfer. The effects of nanofluid concentration on pressure drops were investigated through experiments conducted in both parallel- and counter-flow conditions.

Suggested Citation

  • Nese Budak Ziyadanogullari & Suleyman Percin, 2024. "An Experimental Investigation of the Effects of Using Hexagonal BN–Water Nanofluids on the Thermal Performance and Pressure Drop of a Concentric Tube Heat Exchanger," Energies, MDPI, vol. 17(6), pages 1-14, March.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:6:p:1269-:d:1352590
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