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References

[1] Pak B, Cho Y. Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide
particles. Experimental Heat Transfer 1998; 11: 151170.

[2] Lee S, Choi S, Li S, Eastman JA. Measuring thermal conductivity of fluids containing oxide nanoparticles. ASME Journal Heat Transfer 1999; 121:280–289.
[3] Wang X, Xu X, Choi S. Thermal conductivity of nanoparticle – fluid mixt-ure. Journal of Thermophysics and Heat Transfer 1999; 13: 474–480.
[4] Xuan Y, Li Q. Heat transfer enhancement of nanofluids. International Journal of Heat and Fluid Flow 2000; 21: 58–64.
[5] Xuan Y, Roetzel W. Conceptions for heat transfer correlation of nanofluids. International Journal of Heat and Mass Transfer 2000; 43: 3701–3707.
[6] Das SK, Putra N, Thiesen P, Roetzel W. Temperature dependence of thermal conductivity enhancement for nanofl-uids. ASME Journal of Heat Transfer 2003; 125: 567–574.
[7] Yang Y, Zhang ZG, Grukle AK, Anderson WB, Wu G. Heat transfer properties of nanoparticle-in-fluid disper-sions (nanofluids) in laminar flow. International Journal of Heat and Mass Transfer 2005; 48: 1107–1116.

Tikrit Journal of Engineering Sciences (2017) 24(3) 52- 63

Experimental Analysis of Heat Transfer Enhancement and Flow with Cu, TiO2 Ethylene Glycol Distilled Water Nanofluid in Spiral Coil Heat 

Khalid Faisal Sultan
Electromechanical Eng. Dept., University of Technology, Iraq

Abstract

This experimental investigation was performed to improve heat transfer in the heat exchanger (tube of shell and helically coiled (using nanoparticles for turbulent parallel flow and counter flow of distilled water (Dw) and ethylene glycol (EG) fluids. Six types of nanofluids have been used namely: copper-distilled water, copper – distilled water and ethylene glycol, copper – ethylene glycol, titanium oxide – distilled water, titanium oxide – distilled water and ethylene glycol, titanium oxide – ethylene glycol with 0.5%,1%,2%,3% and 5% volume concentration as well as the range of Reynolds number are 4000 – 15000. The experimental results reveal that an increase in coefficient of heat transfer of 50.2 % to Cu – Dw, 41.5% to Cu – ( EG + Dw ), 32.12 % for Cu – EG , 36.5% for TiO2 – Dw, 30.2 % to TiO2 – ( EG + Dw) and 25.5%, to TiO2 – EG . The strong nanoconvection currents and good mixing caused by the presence of Cu and TiO2 nanoparticles. The metal nanofluids give more improvement than oxide nanofluids. The shear stress of nanofluids increases with concentration of nanoparticles in the case of parallel and counter flow. The effect of flow direction is insignificant on coefficient of overall heat transfer and the nanofluids behave as the Newtonian fluid for 0.5%,1%,2%,3% and 5%. Good assent between the practical data and analytical prediction to nanofluids friction factor which means the nanofluid endure pump power with no penalty. This study reveals that the thermal performance from nanofluid Cu – Dw is higher than Cu – (EG + Dw) and Cu – EG due to higher thermal conductivity for the copper and distilled water compared with ethylene glycol.

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Keywords: Nanofluid, ethylene glycol, enhancement, metallic, nano metallic.

How to cite

TJES: Sultan KF. Experimental analysis of heat transfer enhancement and flow with Cu, TiO2 ethylene glycol distilled water nanofluid in spiral coil heat. Tikrit Journal of Engineering Sciences 2017; 24(3): 52-63.

APA: Sultan,  K. F. (2017). Experimental analysis of heat transfer enhancement and flow with Cu, TiO2 ethylene glycol distilled water nanofluid in spiral coil heat. Tikrit Journal of Engineering Sciences, 24(3): 52-63.