Heat transfer performance and exergy analyses of MgO and ZnO nanofluids using water/ethylene glycol mixture as base fluid

2021 ◽  
pp. 1-20
Author(s):  
M. Gamal ◽  
M. S. Radwan ◽  
I. G. Elgizawy ◽  
M. H. Shedid
Keyword(s):  
Heat Transfer ◽  
Ethylene Glycol ◽  
Base Fluid ◽  
Heat Transfer Performance ◽  
Transfer Performance ◽  
Zno Nanofluids ◽  
Exergy Analyses

Comparative Study of Cooling Performance of Automobile Radiator Using Al2O3-Water and Carbon Nanotube-Water Nanofluid

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Sandesh S. Chougule ◽  
S. K. Sahu
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Base Fluid ◽  
Heat Transfer Performance ◽  
Pure Water ◽  
Transfer Performance ◽  
Nanoparticle Concentration ◽  
Cooling Performance ◽  
Forced Convective Heat Transfer ◽  
Better Than

In the present study, the forced convective heat transfer performance of two different nanofluids, namely, Al2O3-water and CNT-water has been studied experimentally in an automobile radiator. Four different concentrations of nanofluid in the range of 0.15–1 vol. % were prepared by the additions nanoparticles into the water as base fluid. The coolant flow rate is varied in the range of 2 l/min–5 l/min. Nanocoolants exhibit enormous change in the heat transfer compared with the pure water. The heat transfer performance of CNT-water nanofluid was found to be better than Al2O3-water nanocoolant. Furthermore, the Nusselt number is found to increase with the increase in the nanoparticle concentration and nanofluid velocity.

Investigation of Heat Transfer Performances of Nanofluids Flow through a Circular Minichannel Heat Sink for Cooling of Electronics

2013 ◽  
Vol 832 ◽  
pp. 166-171
Author(s):  
M.R. Sohel ◽  
Saidur Rahman ◽  
Mohd Faizul Mohd Sabri ◽  
M.M. Elias ◽  
S.S. Khaleduzzaman
Keyword(s):  
Heat Transfer ◽  
Heat Sink ◽  
Base Fluid ◽  
Heat Transfer Performance ◽  
Volume Fraction ◽  
Transfer Performance ◽  
Block Dimension ◽  
Electronic Heat ◽  
Flow Through ◽  
Cooling Of Electronics

Nanofluid is the suspension of nanoparticle in a base fluid. In this paper, the heat transfer performances of the nanofluids flow through a circular shaped copper minichannel heat sink are discussed analytically. Al2O3-water, CuO-water, Cu-water and Ag-water nanofluids were used in this analysis to make comparative study of their thermal performances. The hydraulic diameter of the minichannel is 500 μm and total block dimension is 50mm× 50mm× 4mm. The analysis is done at different volume fractions of the nanoparticle ranging from 0.5 vol.% to 4 vol.%. The results showed that the heat transfer performance increases significantly by the increasing of volume fraction of nanoparticle. Ag-water nanofluid shows the highest performance compared to the other nanofluids. So, this nanofluid can be recommended as a coolant flow through a circular minichannel for cooling of electronic heat sink.

Effective Viscosity Measurement of CuO and ZnO Nanofluids

2009 ◽  
Author(s):  
Dale A. McCants ◽  
M. Yakut Ali ◽  
Jamil Khan
Keyword(s):  
Heat Transfer ◽  
Effective Viscosity ◽  
Heat Transfer Performance ◽  
Volume Concentration ◽  
Theoretical Models ◽  
Experimental Results ◽  
Transfer Performance ◽  
Increase With Increase ◽  
Zno Nanofluids ◽  
Thermo Physical Properties

Nanofluid has the promising potential for enhancing the heat transfer performance of conventional fluids. Several experimental and numerical attempts have been made earlier to investigate its important thermo physical properties like thermal conductivity and viscosity. The findings and results are quite disperse instead of reaching a definitive agreement. This paper presents effective viscosity measurements of CuO and ZnO nanofluids experimentally. A Brookfield viscometer model DV-I Prime with a CPE 40 cone has been used to determine the effective viscosity of nanofluids. The measurements have included the effect of volume concentration of nanoparticles and temperature. The experimental results are compared with several experimental and theoretical models available in the existing literature. From the obtained experimental results it can be concluded that the viscosity values of the above mentioned nanofluids has a tendency to increase with increase of nanoparticle concentration and follows a decreasing trend with an increase in temperature. Presented results can be used to define the above mentioned nanofluids within the experimental volume concentration range in CFD software package and hence to predict overall heat transfer performance using these nanofluids.

Toward improved heat transfer performance of annular heat exchangers with water/ethylene glycol-based nanofluids containing graphene nanoplatelets

2016 ◽  
Vol 126 (3) ◽  
pp. 1427-1436 ◽  
Author(s):  
Hamed Khajeh Arzani ◽  
Ahmad Amiri ◽  
Hamid Khajeh Arzani ◽  
Shaifulazuar Bin Rozali ◽  
S. N. Kazi ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Ethylene Glycol ◽  
Heat Exchangers ◽  
Heat Transfer Performance ◽  
Graphene Nanoplatelets ◽  
Transfer Performance

Fluid Flow and Heat Transfer Characteristics of Ethylene Glycol and Water in Copper-Based Microchannel Devices

2009 ◽  
Author(s):  
Fanghua Mei ◽  
B. Lu ◽  
W. J. Meng ◽  
S. Guo
Keyword(s):  
Heat Transfer ◽  
Ethylene Glycol ◽  
High Performance ◽  
Heat Transfer Performance ◽  
Pure Water ◽  
High Heat Flux ◽  
Transfer Performance ◽  
Fluid Medium ◽  
Flow And Heat Transfer ◽  
Transfer Testing

Metal-based microchannel heat exchangers (MHEs) offer potential solutions to applications demanding high heat flux removal, such as cooling of high-performance microelectronic and energy-efficient lighting modules. Efficient fabrication of metal-based MHEs and quantitative flow and heat transfer measurements on them are critical for establishing the economic and technical feasibility of such devices. Adopting metal-based MHEs in many applications demands quantification of flow and heat transfer performance with application-relevant coolants, e.g. ethylene glycol (EG)/water mixtures rather than pure water. As a first step in this direction, we report here fabrication and assembly of all-Cu MHE prototypes, as well as results of flow and heat transfer testing using pure EG and pure water as the fluid medium. Results of heat transfer testing indicate sensitivity of overall heat transfer performance to entrance length effects, which in the case of pure EG, is significantly influenced by its physical properties under the testing condition.

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