Heat transfer augmentation of mixture ratio TiO2 to SiO2 in hybrid nanofluid / K.A. Hamid...[et al.]

Hamid, K.A. and Azmi, W.H. and Nabil, M.F. and Mamat, Rizalman (2017) Heat transfer augmentation of mixture ratio TiO2 to SiO2 in hybrid nanofluid / K.A. Hamid...[et al.]. Journal of Mechanical Engineering (JMechE), SI 4 (3). pp. 51-63. ISSN 18235514

Abstract

The efficiency in heat transfer fluid for cooling systems can be improved with the use of hybrid nanofluid. The combination of two or more single nanoparticles in the hybrid nanofluid improve their thermo-physical properties, hence contribute in heat transfer performance. The experimental investigation on forced convection heat transfer of hybrid nanofluid have been carried out on the evaluation of heat transfer coefficient and Nusselt number. The designated working temperature was 30oC, tested for various volume percentage of TiO2 to SiO2. The experiment was conducted in a plain tube under constant heat flux at 7,955W/m2. The hybrid nanofluid was prepared at 1.0% volume concentration at three mixture ratios of TiO2 to SiO2. The range of average enhancement in the heat transfer coefficient and Nusselt number observed were 13.6-29.7% and 9.0-17.8%, respectively. The ratio of TiO2 to SiO2 at 20:80 showed the optimum ratio that can be used to obtain maximum enhancement in heat transfer coefficient and Nusselt number. The pressure drop of the hybrid nanofluid increased about double the base fluid for ratio 50:50. Due to the small increment in friction factor which was 1.03 times, the hybrid nanofluid are appropriate for application of cooling systems. It is recommended to use TiO2- SiO2 nanofluid at ratio 20:80 due to its significant enhancement in heat transfer but least increment in friction factor.

Metadata

Item Type: Article
Creators:
CreatorsEmail / ID. Num
Hamid, K.A.khamisah0301@gmail.com
Azmi, W.H.UNSPECIFIED
Nabil, M.F.UNSPECIFIED
Mamat, RizalmanUNSPECIFIED
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > Heat engines
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
Journal: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 18235514
Volume: SI 4
Number: 3
Page Range: pp. 51-63
Item ID: 39083
Uncontrolled Keywords: forced convection, heat transfer, TiO2-SiO2 hybrid nanofluids, mixture, water-ethylene glycol.
URI: http://ir.uitm.edu.my/id/eprint/39083

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