Al-Amiri, R.Y. and Al-Akaishi , A.S. 2025. Evaluating the Thermal Performance of Solar Water Heating System Used Polypropylene Glycol with Al2O3 Nanoparticles in Different Concentrations as a Thermal Medium. Samarra Journal of Engineering Science and Research. 2, 4 (Jan. 2025), 78–94. DOI:https://doi.org/10.65115/41mw6a19.