Experimental investigation of enhanced heat transfer of a car radiator using ZnO nanoparticles in H2O–ethylene glycol mixture

The present study examines the augmentation in heat transfer and friction in a flow through solar air heater duct with discretized broken V-rib roughness. The experimental outcomes pertaining to Reynolds number from 3000 to 17,000, relative gap position (s′/s) from 0.2 to 0.8, relative staggered rib position (p′/p) from 0.2 to 0.8 have been presented and discussed. Discretized broken V-rib roughness brought out considerable enhancement in heat transfer rates over V-rib roughness and smooth duct. Effective efficiency of discretized broken V-rib roughened solar air heater is estimated and geometrical parameters of roughness are optimized with regard to temperature rise parameter and insolation.

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Experimental investigation on convective heat transfer coefficient of water/ethylene glycol-carbon nanotube nanofluids

International Journal of Ambient Energy ◽

10.1080/01430750.2018.1472649 ◽

2018 ◽

Vol 41 (4) ◽

pp. 428-430 ◽

Cited By ~ 1

Author(s):

S. P. Venkatesan ◽

J. Hemanandh

Keyword(s):

Heat Transfer ◽

Experimental Investigation ◽

Heat Transfer Coefficient ◽

Carbon Nanotube ◽

Ethylene Glycol ◽

Transfer Coefficient ◽

Convective Heat Transfer ◽

Convective Heat ◽

Convective Heat Transfer Coefficient

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Experimental investigation into honeycomb heat sinks incorporating varying size slots for enhanced heat transfer

2010 12th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems ◽

10.1109/itherm.2010.5501381 ◽

2010 ◽

Author(s):

Domhnaill Hernon

Keyword(s):

Heat Transfer ◽

Experimental Investigation ◽

Heat Sinks ◽

Enhanced Heat Transfer

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Experimental investigation on enhanced heat transfer of vertical condensers with trisection helical baffles

Energy Conversion and Management ◽

10.1016/j.enconman.2015.11.044 ◽

2016 ◽

Vol 109 ◽

pp. 51-62 ◽

Cited By ~ 13

Author(s):

Jiafeng Wu ◽

Jiahao Zhou ◽

Yaping Chen ◽

Mingchao Wang ◽

Cong Dong ◽

...

Keyword(s):

Heat Transfer ◽

Experimental Investigation ◽

Enhanced Heat Transfer

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An Attempt to Uncouple the Effect of Coriolis and Buoyancy Forces Experimentally on Heat Transfer in Smooth Circular Tubes That Rotate in the Orthogonal Mode

Journal of Turbomachinery ◽

10.1115/1.2928039 ◽

1992 ◽

Vol 114 (4) ◽

pp. 858-864 ◽

Cited By ~ 12

Author(s):

W. D. Morris ◽

R. Salemi

Keyword(s):

Heat Transfer ◽

Thermal Conductivity ◽

Experimental Investigation ◽

Circular Tube ◽

Leading Edge ◽

Combined Effect ◽

Enhanced Heat Transfer ◽

Coriolis Forces ◽

Circular Tubes ◽

Buoyancy Forces

This paper reports the results of an experimental investigation of the combined effect of Coriolis and buoyancy forces enforced convection in a circular tube that rotates about an axis orthogonal to its centerline. The experiment has been deliberately designed to minimize the effect of circumferential conduction in the tube walls by using material of relatively low thermal conductivity. A new correlating parameter for uncoupling the effect of Coriolis forces from centripetal buoyancy is proposed for the trailing and leading edges of the tube. It is demonstrated that enhanced heat transfer on the trailing edge occurs as a result of rotation. On the leading edge significant reductions in heat transfer compared to the zero rotation case can occur, but with possible recovery at high rotational speeds.

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Heat Transfer Performance of Titanium Oxide in Ethylene Glycol Based Nanofluids under Transition Flow

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.660.684 ◽

2014 ◽

Vol 660 ◽

pp. 684-688 ◽

Cited By ~ 5

Author(s):

Khamisah Abdul Hamid ◽

Wan Hamzah Azmi ◽

Rizalman Mamat ◽

Nur Ashikin Usri

Keyword(s):

Heat Transfer ◽

Experimental Investigation ◽

Reynolds Number ◽

Ethylene Glycol ◽

Titanium Oxide ◽

Transition Region ◽

Constant Heat Flux ◽

Transition Flow ◽

Enhancement Of Heat Transfer ◽

Number Range

The needs to improve the efficiency of coolants undeniably become one of the concerns in cooling systems technologies nowadays. Nanofluid as coolant is invented and studied where it can provide better option for users due to augmentation in properties. This study provides experimental investigation on Titanium Oxide dispersed in water and ethylene glycol mixture under transition region with Reynolds number range of 2000 < Re <10000. Three volume concentrations are used which are 0.5 %, 1.0 % and 1.5 % for heat transfer experimental investigation under working temperature of 30 °C at constant heat flux of 600 W. The Nusselt number of the nanofluid increase with the increasing of Reynolds number at 1.5 % concentration, slightly higher than based fluid. The finding on the heat transfer coefficient shows enhancement of 2.1 % achieved by Titanium Oxide nanofluid at 1.5 % volume concentration. For 0.5 % and 1.0 % concentration, no enhancement of heat transfer achieved for the fluid flow under transition region at temperature of 30 °C.

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