Title: Performance Evaluation of Solar Air Heater with Hexagonal Ribbed Absorber Plate. Dr. Nilesh Shinde completed his Ph.D. at Medicaps Vidyapeeth, Indore, under the guidance of Dr. Himanshu Borade. His research focused on improving heat transfer and efficiency in solar air heaters using hexagonal ribs. The findings have significant implications for advancing solar energy technology and sustainable applications.