Investigation and prediction of Energy consumption at St. Olavs Hospital Kristofersen, by Hans Smedsrud, Kai Xue, Zhirong Yang, Liv-Inger Stenstad, Tor Emil Giske and Guangyu Cao E3S Web Conf., 246 (2021) 04003 Published online: 29 March 2021 DOI: 10.1051/e3sconf/202124604003