期刊
MATERIALS TODAY-PROCEEDINGS
卷 43, 期 -, 页码 3896-3903出版社
ELSEVIER
DOI: 10.1016/j.matpr.2020.12.1233
关键词
CNT nanofluid; Helical coil; Friction factor; Heat transfer; Mixed surfactant
资金
- FRGS grant by Guru Gobind Singh Indraprastha University, New Delhi, India
This study demonstrates that CNT nanofluids exhibit superior heat transfer characteristics compared to water and surfactant-water solutions. The CNT nanoparticles play a significant role in enhancing the heat transfer rate of the nanofluid.
Nanofluids are gaining attention due to their excellent heat transfer characteristics as compared to conventional basefluids. In this study, CNT nanofluid was prepared using double distilled water (as basefluid) and mixed surfactant (a mixture of surfactant SDBS and GA) keeping the Surfactant/CNT ratio 1. Hydrodynamics as well as heat transfer characteristics of water, surfactant-water solution and CNT nanofluid were investigated in coil tube heat exchanger. Thermo-physical properties of surfactant-water solution and CNT nanofluid were also examined. Results showed no difference in viscosity of surfactant-water solution in comparison to water but a slight increment in density of the surfactant-water solution compared to water. Also, it was found that friction factor was increased with increase in Reynolds number for water, surfactant-water solution and CNT nanofluid. The overall heat transfer coefficient was 62.62% higher for CNT nanofluid at 5000 Reynolds number as compared to water. No enhancement was observed in heat transfer coefficient for surfactant-water solution in comparison to water. These results concluded that CNT nanoparticles play a major role to enhance the heat transfer rate of nanofluid in contrast to water. (c) 2020 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Nanoelectronics, Nanophotonics, Nanomaterials, Nanobioscience & Nanotechnology.
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