Total views : 192
Convective Heat Transfer and Stability of Oil –Based Nanofluid
Objectives: Design and building a dedicated device (test rig) for measuring the convective heat transfer coefficient for an oil – based nanofluid under a laminar flow regime and a uniform heat flux. Preparing a stable oil – based nanofluid. Measuring experiment the stability of oil – based on nanofluid. Methods/Statistical Analysis: The nanofluid was prepared via two steps method, with three different mixing processes. Lubricating oil was used as a host liquid with aluminum oxide (Al2O3) as nanoparticles, with two particle sizes of 80 nm and 30 nm and different concentrations of (0.2, 0.6, 1 and 2) %wt. In order to study the effect of nanofluids on heat transfer coefficient, a dedicated test rig designed and built consisting of horizontal copper pipe, oil gear pump, nanofluid tank, heater and heat exchanger as a major components of the rig in addition of the accessory components and measuring devices.The stability of the nanofluid measured experimentally with Zeta Potential Analyzer. Findings: The heat transfer coefficient increased with increasing of the particle loading and decrease the particle size, the maximum enhancement in heat transfer coefficient at 2% wt was (7.83% and 16.75%) for 80 nm and 30 nm particle sizes, respectively. The best stability was found to be with 30 nm particle size at lower particle loading of (0.2% wt) and this concentration was recommended to use due to the excellent stability, lower cost and almost unnoticeable increasing in pressure drop. The nanofluid stability decreases with increasing both the particle size and particle loading. Application/Improvements: The base fluid of the used nanofluids is lubricating oil of automobile engine and the study showed an enhancement in the heat transfer coefficient with small penalty in pressure drop especially for the samples of low concentration and smallest particle size.
Convective Heat Transfer, Nanofluid, Nusselt Number, Oil-Based Nanofluid, Pressure Drop, Stability.
- Zhang Z, Zenyu Z, Simionesie S, Dorin D, Schaschke S, Carl C. Graphite and Hybrid Nanomaterials as Lubricant Additives, Lubricants. 2014; 2:44–65.
- Dorinson A, Ludema KC. Mechanics and Chemistry in Lubrication. Elsevier: Amsterdam, The Netherlands, 1985.
- Choi SU. Nanofluid Technology - Current Status and Future Research. Argonne, IL 60439, 1998.
- Bianco V, Manca O, Nardini S, Vafai K. Heat Transfer Enhancement with Nanofluids. Taylor and Francis Group, LLC. 2015.
- Milligan CA. An Investigation of Heat Transfer Enhancement in Nanofluids Containing Core and shell Nanoparticles. University of Louisville, 2014.
- Liu K. Heat Transfer Measurement in oil – Based Nanofluid. University of Louisville, 2011.
- Pirhayati M, Akhavan-Behabadi MA, Khayat M. Convective Heat Transfer of Oil Based Nanofluid Flow Inside a Circular Tube, International Journal of Engineering. IJE Transactions B : Applications. 2014 Feb; 27(2):341–48.
- Al-Saady NS. Investigation of Heat Transfer Enhancement with Nanofluid and Twisted Tape Inserts in a Circular Tube. University of Technology, Baghdad, Iraq. 2014.
- Sultan KF. An Investigation into Heat Transfer and Flow of Nanofluids in Circular Tube. University of Technology, Baghdad, Iraq. 2012.
- Holman JP. Heat Transfer. McGraw – Hill Companies, Inc., Tenth Edition. 2010.
- Holman JP. Experimental Methods for Engineers. McGraw – Hill Companies, Inc., Eighth Edition, 2012.
- Asker AH. The Effect of Magnetic Field with Nanofluid on Heat Transfer in a Horizontal Pipe. University of Technology, Baghdad, Iraq. 2016.
- Francisco e la Cruz E, Zheng Y, Torres E, Li W, Song W, Burugapalli K. Zeta Potential of Modified Multi-Walled Carbon Nanotubes in Presence of Poly (Vinyl Alcohol) Hydrogel, International Journal of Electrochemical Science. 2012; 7:3577–90.
- Colloidal Dynamics, Electroacoustics Tutorial, The Zeta Potential. 1999.
- Xu Y. Tutorial: Capillary Electrophoresis. Cleveland State University, Springer – verlay New York, Inc.1996.
- Zeta Potential: An Introduction in 30 minute, Zetasizernano Series Technical Note, Malvern Instrument.
- Zeta Potential Analysis of Nanoparticles, Nano Composix. September 2012; 11.
- Júnior JA, Baldo JB. The Behavior of Zeta Potential of Silica Suspensions, New Journal of Glass and Ceramics. 2014; 4:29–37.
- Thome JR. Engineering Data Book III. Faculty of Engineering Science and Technology, Swiss Federal Institute of Technology Lousanne (EPFL) CH – 1015 Lousanne, Switzerland, 2010, Wolverine Tube, Inc.
- Sharma, Pandey KM. Numerical Investigation of Heat Transfer Characteristics in Triangular Channel in Light Water Nuclear Reactor by using CuO-Water based Nanofluids, Indian Journal of Science and Technology. 2016 Apr; 9(16):1−6.
- Singh RN, Rajat P, Lav I, Pandey PK. Experimental Studies of Nanofluid TiO2/CuO in a Heat Exchanger (Double Pipe), Indian Journal of Science and Technology. 2016 Aug; 9(31):1−6.
- Bakar NNA, Bachok N, Arifin N. Boundary Layer Flow and Heat Transfer in Nanofluid over a Stretching Sheet using Buongiorno Model and Thermophysical Properties of Nanoliquids, Indian Journal of Science and Technology. 2016 Aug; 9(31):1−9.
- Kajla S, Sehgal SS. Computational Analysis on the Effects of CuO-Water based Nanofluids on the Performance of Flat Plate Solar Collector, Indian Journal of Science and Technology. 2016 Sep; 9(36):1−10.
This work is licensed under a Creative Commons Attribution 3.0 License.