Study on concentric tube heat exchanger heat transfer performance using Al2O3 – water based nanofluids

In the present study, the heat transfer characteristics of Al2O3 – water nanofluids as a coolant used in concentric tube heat exchanger are presented. The heat exchanger is fabricated from copper concentric inner tube with a length of 1000mm. The nanofluids are the mixture of water as base fluid and...

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Bibliographic Details
Published in:International communications in heat and mass transfer 2013-12, Vol.49, p.60-68
Main Authors: Sonawane, Shriram S., Khedkar, Rohit S., Wasewar, Kailas L.
Format: Article
Language:English
Subjects:
Applied sciences
Chemistry
Colloidal state and disperse state
Concentric tube heat exchanger
Condensed matter: structure, mechanical and thermal properties
Convective heat transfer
Devices using thermal energy
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fluid dynamics
Fluid flow
Fluids
General and physical chemistry
Heat exchangers (included heat transformers, condensers, cooling towers)
Heat transfer
Nanocomposites
Nanofluids
Nanomaterials
Nanostructure
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Physics
Thermal properties of condensed matter
Thermal properties of small particles, nanocrystals, nanotubes
Tube heat exchangers
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Summary:In the present study, the heat transfer characteristics of Al2O3 – water nanofluids as a coolant used in concentric tube heat exchanger are presented. The heat exchanger is fabricated from copper concentric inner tube with a length of 1000mm. The nanofluids are the mixture of water as base fluid and Al2O3 particles in nanorange. The results obtained from the nanofluids cooling in concentric tube heat exchanger are compared with those from base fluids. The effects of inlet flow rate of hot fluids, Reynold's number and composition of nanofluids on concentric tube heat exchanger are considered. It is observed that average heat transfer rates for nanofluids as cooling media are higher than those for the water as cooling media, and this increases with concentration of nanofluids' composition. The results of this study have technological importance for the efficient design of concentric tube heat exchanger to enhance cooling performance at low heat flux cooling systems. •Heat transfer study on concentric tube heat exchanger•Performance evaluation of heat transfer for nanofluids as one of the coolants•Comparison of thermal performance of concentric tube heat exchanger with nanofluids and water as base fluids
ISSN:0735-1933
1879-0178
DOI:10.1016/j.icheatmasstransfer.2013.10.001