Experimental study on utilization of heat pipe heat exchanger for improving efficiency of clean room air system in hospitalsImansyah Ibnu Hakim, Nandy Putra, Adam Prihananda Marda, Muhammad Alvin Alvaro and Adi WinartaE3S Web Conf., 67 (2018) 02056DOI: https://doi.org/10.1051/e3sconf/20186702056