Investigating the Effect of Design Parameters on Solar Heater Efficiency using OptimizationL. Ganesh Babu, K. Suresh Kumar, S. Kalaiarasan, V. J. Vijayalakshmi, L. Girisha and R. KarthikeyanE3S Web Conf., 648 (2025) 03013DOI: https://doi.org/10.1051/e3sconf/202564803013