Ahmed, Waqar and Zhang, Hongtao and Zhou, Xueling and Mehmood, Shahid and Nawaz, Noman and Kazi, S. N. and Zhan, Yiqiang (2023) ZnO intercalated into graphene oxide based 2-D binary composite for improved thermal properties using as a potential nanofluid. Journal of Molecular Liquids, 391 (B). ISSN 0167-7322, DOI https://doi.org/10.1016/j.molliq.2023.123426.
Full text not available from this repository.Abstract
Nanofluids have expanded a substantial approbation in the renewable and sustainable energy field. A small number of solid nanoparticles with higher thermal conductivity added into conventional fluid could develop a bigger improvement in heat transfer. The current study is focused on the preparation of metal oxide (ZnO) and Graphene oxide (GO) based composite nanofluids to achieve the higher thermal properties of composite as a potential nanofluid. The advanced hummer method and sonochemical techniques were used to synthesize ZnO, GO, and ZnO@GO composites. Further 2-step preparation methods were used to prepare ZnO@GO/DW based stable nanofluids at changing 0.1, 0.075, 0.05, and 0.025 wt% concentrations. All the materials were confirmed by different characterizations like XRD, RAMAN, FESEM, EDX, and UV-Vis analysis. At 0.1 wt% all the nano-fluids showed a higher thermal conductivity, viscosity, and density which is 0.821 W/m.K, 2.85 kg.m(-1)s(-1), and 1.0018 g/cm(3). All the wt.% were tested for stability analysis using the sedimentation photograph method and found remarkable stability up to 5 weeks after the day of preparation without using any surfactant. Similarly, all the nanofluids were tested for hydrodynamic characteristics like friction coefficient (ff), pressure drop(Delta P), and pumping power (PP) where a notable value of friction was 0.057, a 12000 m. Pa pressure drop and 1.45 MPa pumping power were achieved at 0.1 wt% against the higher value of Reynold numbers (5849 to 24544). Finally, the greater development in average heat transfer/Nusselt numbers was achieved which is 3010/70 W/m(2).K, 2490/42 W/m(2).K, 2133/32 W/m(2).K 2000/29 W/m(2).K and 1000/W/m(2).K for all wt.% and base fluid (DW) at a higher rate of Reynold Number. This all happened due to the use of ZnO and GO composite together.
| Item Type: | Article |
|---|---|
| Funders: | National Key Research & Development Program of China (2022YFE0137400) |
| Uncontrolled Keywords: | Composite; Nanofluids; Heat transfer; Nusselt numbers; Thermal conductivity |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 09 Sep 2025 02:50 |
| Last Modified: | 09 Sep 2025 02:50 |
| URI: | http://eprints.um.edu.my/id/eprint/50598 |
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