The modelling of reverse defrosting cycles of air-to-water heat pumps with TRNSYS Matteo Dongellini, Agostino Piazzi, Filippo De Biagi and Gian Luca Morini E3S Web Conf., 111 (2019) 01063 Published online: 13 August 2019 DOI: 10.1051/e3sconf/201911101063