M. Kh., Abdolbaqi and N. A. C., Sidik and Azmi, W. H. and R., Mamat (2016) An Experimental Determination of Thermal Conductivity and Electrical Conductivity of Bio Glycol Based Al2O3 Nanofluids and Development of New Correlation. International Communications in Heat and Mass Transfer, 73. pp. 75-83. ISSN 0735-1933. (Published)
|
PDF
fkm-2016-abdolbaqi-Experimental Determination of Thermal Conductivity.pdf Download (126kB) | Preview |
Abstract
Nanofluid, as a kind of new engineered material consisting of nanometer-sized additives and base fluids, has attracted great attention from investigators for its superior thermal properties and many potential applications. In this paper, the thermal conductivity, dispersion stability and electrical conductivity of 100% bioglycol (BG) based nanofluids containing Al2O3 nanoparticles were studied in a temperature range of 30 to 80 °C. Nanofluids with 0.1, 0.3, 0.5, 0.7, and 1% volume concentrations were prepared using the two-step method without using surfactant. The nanofluids demonstrated excellent stability over this temperature range after using long-term sonication. A new correlation has been developed for the thermal conductivity of nanofluids as a function of temperature and particle volume concentration. This study also revealed that the thermal conductivity enhancement of bio glycol (BG), ethylene glycol (EG) and propylene glycol (PG) of 1.0% volume concentration at 30 °C was 17%, 9% and 3.6% respectively. However, the increment in temperature reacts inversely to the thermo-electrical conductivity (TEC) ratio. The maximum value of TEC is 9.5 at 0.5% volume concentrations and temperature of 30 °C.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Nanofluids; Bio glycol; Alumina nanoparticles; Dispersion stability; Thermal conductivity; Electrical conductivity |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Faculty/Division: | Faculty of Mechanical Engineering |
| Depositing User: | Dr. Wan Azmi Wan Hamzah |
| Date Deposited: | 15 Sep 2016 04:53 |
| Last Modified: | 12 Sep 2017 06:44 |
| URI: | http://umpir.ump.edu.my/id/eprint/14377 |
| Download Statistic: | View Download Statistics |
Actions (login required)
 |
View Item |