Application of PEG-Fe3O4 nanofluid in flat-plate solar collector: An experimental investigation
Document Type
Article
Publication Date
12-1-2023
Abstract
In the present study, novel in-situ oxidation precipitation of ferrous hydroxide method is used to synthesized Fe3O4 nanoparticles and Polyethylene glycol 200 is used for covalent functionalization. Various characterizations tests (FESEM, EDX, XRD, FTIR, HRTEM) were performed, and the Polyethylene glycol treated Iron oxides functionalization was confirmed. Thermal conductivity, density, specific heat, and viscosity were experimentally assessed and validated using the correlations that were available. The corresponding improvements in thermophysical characteristics were 13.35%, 0.06%, 0.37%, and 20.9% at 0.1 wt% and 35 degrees C. UV-vis spectroscopy and Zeta protentional was used to check the stability of nanofluids and found that nanofluid was stable for 30 days. A flat plate solar collector was experimentally installed, and the thermal performance of collector was calculated using ferrofluid under ASHRAE standard 93-2003 at different heat flux intensities (597,775,988 W/m(2)), mass flow rates ((0.0133, 0.0200, 0.0266 kg/s), inlet fluid temperature (30-50 degrees C) and weight concentrations (0.025,0.05,0.075,0.1%). The highest thermal efficiency enhancement of 13.83% was noticed. Moreover, the ANSYS-CFD model was used for the numerical analysis of the thermal performance of flat plate collector at the same environmental conditions, and a maximum difference of 8.33% at 0.1 wt% was noticed in comparison with experimental data.
Keywords
Thermophysical properties, heat transfer, Nanofluids, Solar collector, Computational fluid dynamics modelling
Divisions
AcademyofMalayStudies,mechanical
Funders
None
Publication Title
Solar Energy Materials and Solar Cells
Volume
263
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS