@articleGrabo_Acar_Kenig_2021, title=Modeling and improvement of a packed bed latent heat storage filled with non-spherical encapsulated PCM-Elements, volume=173, DOI=10.1016/j.renene.2021.04.022, journal=Renewable Energy, author=Grabo, Matti and Acar, Emre and Kenig, Eugeny, year=2021, pages=1087–1097