Using the Hardware-in-the-Loop concept for energetic evaluation of heat generators Martin Knorr, Joachim Seifert, Lars Schinke, Maximilian Beyer, Philipp Mehrfeld and Markus Nürenberg E3S Web Conf., 111 (2019) 01062 Published online: 13 August 2019 DOI: 10.1051/e3sconf/201911101062