Evaluation of the thermal efficiency of ethylene glycol/magnetite nanofluids for use in direct absorption solar collectors

J. Jose Alcalde; Laura Álvarez-Gil; Alejandro Restrepo-Martínez

doi:10.1117/12.3028098

1 October 2024 Evaluation of the thermal efficiency of ethylene glycol/magnetite nanofluids for use in direct absorption solar collectors

J. Jose Alcalde, Laura Álvarez-Gil, Alejandro Restrepo-Martínez

Author Affiliations +

Proceedings Volume 13132, Nonimaging Optics: Efficient Design for Illumination and Concentration XIX; 131320H (2024) https://doi.org/10.1117/12.3028098
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Conference Poster

Abstract

This research evaluates the efficiency of working fluids in direct adsorption solar collectors by incorporating magnetite (Fe₃O⁴) 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.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

J. Jose Alcalde, Laura Álvarez-Gil, and Alejandro Restrepo-Martínez "Evaluation of the thermal efficiency of ethylene glycol/magnetite nanofluids for use in direct absorption solar collectors", Proc. SPIE 13132, Nonimaging Optics: Efficient Design for Illumination and Concentration XIX, 131320H (1 October 2024); https://doi.org/10.1117/12.3028098

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE