TI - Investigating the performance of periwinkle shell (tympanotonos fuscatus) as energy storage material in a passive solar still AU - Akubue, G. AU - Nnaji, C. AU - Abam, F.I. AU - Mbohwa, C. SO - Journal of Thermal Engineering 2026;12:1416-1427. DO - 10.47481/jten.0040