Comparative analysis of flat heat pipe heat exchanger with conventional heat recovery systems in steel industryM. Shanmugam, S. Sundararaj, S. Krithick, S. Mowleeswaran, K. Visva and S. Yoga PrasathE3S Web Conf., 619 (2025) 03008DOI: https://doi.org/10.1051/e3sconf/202561903008