M. A. H., Aizzat and Muhamad Zuhairi, Sulaiman and Enoki, K. and Okawa, T. (2019) Heat transfer coefficient of nucleate boiling in low concentration level of single and hybrid Al2O3-SiO2 water-based nanofluids. In: IOP Conference Series: 1st International Postgraduate Conference on Mechanical Engineering 2018 , 31 October 2018 , UMP Library, Pekan. pp. 1-10., 469 (012109). ISSN 1757-899X
|
Pdf
Heat transfer coefficient of nucleate boiling in low concentration level of single and hybrid.pdf Available under License Creative Commons Attribution. Download (1MB) | Preview |
Abstract
Experiments were conducted to identify the Heat Transfer Coefficient (HTC) in saturated pool boiling of single and hybrid water-based nanofluids. In these experiments, Al2O3 and SiO2 nanoparticles were selected and diluted into two separate single nanofluids, and they were mixed in a different ratio from 0:100, 25:75, 50:50, 75:25 and 100:0 percent to achieve a final total concentration of 0.001 vol. %. Successively, the mixtures were used to obtain the HTC values through experimental works. In the present work, it was found that in the lowest concentration (0.00025 vol.%) of Al2O3 nanofluid, the HTC enhanced considerably but deteriorated for SiO2 nanofluid. Separately, as for the hybrid nanofluids, the HTCs were dramatically enhanced at the initial stage but slowly deteriorated once the time variation increased, especially in a higher ratio of SiO2 nanofluid. The deposition of the nanoparticles onto the surface heater suggested being the main factor, where in the present case, the significant coexisting effect of the deposited hybrid nanoparticles (Al2O3 and SiO2) on the heated surface to the changes of ΔT W due to different nanoparticles properties.
| Item Type: | Conference or Workshop Item (Lecture) |
|---|---|
| Uncontrolled Keywords: | Alumina; Aluminum oxide; Heat transfer coefficients; Nanometals; Nanoparticles |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Faculty/Division: | Faculty of Mechanical Engineering |
| Depositing User: | Mrs. Neng Sury Sulaiman |
| Date Deposited: | 30 Aug 2019 07:48 |
| Last Modified: | 30 Aug 2019 07:48 |
| URI: | http://umpir.ump.edu.my/id/eprint/24548 |
| Download Statistic: | View Download Statistics |
Actions (login required)
 |
View Item |