A PCM based cooling system for office buildings: a state of the art review Evdoxia Paroutoglou, Alireza Afshari, Niels Chr. Bergsøe, Peter Fojan and Göran Hultmark E3S Web Conf., 111 (2019) 01026 Published online: 13 August 2019 DOI: 10.1051/e3sconf/201911101026