Paper 13132-45
Paper 13132-45
Evaluation of the thermal efficiency of ethylene glycol/magnetite nanofluids for use in direct absorption solar collectors
19 August 2024 • 5:30 PM - 7:00 PM PDT | Conv. Ctr. Exhibit Hall A
Abstract
This research evaluates the efficiency of working fluids in direct adsorption solar collectors by incorporating magnetite nanoparticles. Samples with Fe3O4 concentrations ranging from 0 to 1% were evaluated under direct solar exposure conditions. It was determined that the nanofluids exhibit higher thermal efficiency than pure ethylene glycol, indicating that magnetite enhances solar radiation absorption. However, higher nanoparticle concentration was observed to decrease the specific absorption rate (SAR), likely due to lower radiation penetration. These results suggest that SAR could be a useful selection criterion for formulating nanofluids in DASC collector applications.
Presenter
Juan Jose Alcalde-Castro
Univ. Nacional de Colombia Sede Medellín (Colombia)
Juan Jose Alcalde Castro, graduated from the Mechanical Engineering program at the National University of Colombia and is currently a Master student in Mechanical Engineering with a focus on research. Experienced in modeling, rendering and computer-aided three-dimensional mechanical simulation; development of parts for 3D printing by FDM and SLA; analysis of birefringent elements using polarized light techniques. Director and co-director of the UNToy Lab, an undergraduate hotbed for the development of devices for teaching and learning science. Currently working on the energetic analysis of nanofluids applied to direct absorption solar collectors.