The influence of flow modification on air and PCM temperatures in an accumulative heat exchanger Marcin Borcuch, Michał Musiał, Karol Sztekler, Wojciech Kalawa, Stanisław Gumuła and Sebastian Stefański EPJ Web Conf., 180 (2018) 02011 Published online: 04 June 2018 DOI: 10.1051/epjconf/201818002011