Shinde, N. and Borade, D.H. 2025. Enhancing Solar Air Heater Heat Transfer Performance: The Impact of Hexagonal 90° and 120° Inline Ribs with Varying Blockage Ratios in Trapezoidal Ducts. Asian Journal For Convergence In Technology (AJCT) ISSN -2350-1146. 11, 3 (Dec. 2025), 27-36. DOI:https://doi.org/10.33130/AJCT.2025v1103.004.