Experimental investigation of optimum thermal performance and pressure drop of water-based Al2O3, TiO2 and ZnO nanofluids flowing inside a circular microchannel

Adnan Topuz, Tahsin Engin, A. Alper Özalp, Beytullah Erdoğan*, Serdar Mert, Alper Yeter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

This paper presents thermal performance and pressure drop characteristics of water-based nanofluids flowing through a horizontal circular microchannel under the constant surface temperature condition, experimentally. Al2O3 (13 nm), TiO2 (10–25 nm) and ZnO (18 nm) nanoparticles with 0.5, 0.7 and 1.0% volume concentrations were used in order to prepare nanofluid. The thermal conductivity and viscosity values needed for the calculations were obtained by measuring separately. For the experiments, the microchannels made by both the different materials (Stainless steel, PEEK) and the different inner diameter (400, 750, 1000 μm) were tested for the different surface temperatures (283, 298, 313 K). In the tests, the nanofluids had the different inlet temperature (323–333 K), the volume flow rates (20, 35, 50 mL min−1) and the concentrations. Heat transfer rate, Nusselt number, pressure drop and friction factor results were calculated. The optimum conditions were determined by using Taguchi approach. The thermal performance and the pressure drop of the fluids were compared. The results showed that the best thermal performance was obtained for Al2O3 nanofluid with 1.0% vol. concentration. A heat transfer enhancement of 15.3% was achieved using nanofluid instead of deionized water as the base fluid. Moreover, it has been seen no considerable pressure drop.

Original languageEnglish
Pages (from-to)2843-2863
Number of pages21
JournalJournal of Thermal Analysis and Calorimetry
Volume131
Issue number3
DOIs
Publication statusPublished - 1 Mar 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017, Akadémiai Kiadó, Budapest, Hungary.

Funding

Acknowledgements This project was supported by ‘‘The Scientific and Technological Research Council Of Turkey’’ (TUBITAK 1505, Project Number 5140013) and Kale Oto Radyatör Sanayi ve Ticaret A.S¸ . The authors gratefully acknowledge the financial supports provided by TUBITAK and Kale Oto Radyatör.

FundersFunder number
TUBITAK
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu5140013

    Keywords

    • Heat transfer rate enhancement
    • Nanofluid
    • Nusselt number
    • Pressure drop
    • Taguchi approach

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