Optimizing the performance of hemispheric solar still using nano-ZnO with cooling the glassy cover at a variable water flow rate

Mohammed El Hadi Attia, A.E. Kabeel, S.A. El‐Agouz, El Mir Mabrouk Lassaad, Ravishankar Sathyamurthy, Moataz M. Abdel‐Aziz