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

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Özet

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.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)2843-2863
Sayfa sayısı21
DergiJournal of Thermal Analysis and Calorimetry
Hacim131
Basın numarası3
DOI'lar
Yayın durumuYayınlandı - 1 Mar 2018
Harici olarak yayınlandıEvet

Bibliyografik not

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

Finansman

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.

FinansörlerFinansör numarası
TUBITAK
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu5140013

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