Investigations of prototype ejection refrigeration system driven by low grade heat Dariusz Butrymowicz, Jerzy Gagan, Kamil Śmierciew, Michał Łukaszuk, Adam Dudar, Andrzej Pawluczuk, Adam Łapiński and Adam Kuryłowicz E3S Web Conf., 70 (2018) 03002 Published online: 03 December 2018 DOI: 10.1051/e3sconf/20187003002