Cyclic melting and freezing of phase change material in open-cell micro-foam were studied using numerical simulations. Effects of melting/freezing strengths and durations were investigated by comparing volume-averaged one- and two-temperature models to more accurate structure-based direct simulations. The volume-averaged simulations with proper thermo-physical parameters agree well with the average temperature and volume fraction of melted phase change material from direct simulation studies. However, they were found not to accurately predict the temperature difference between micro-foam and phase change material and underestimate the top-wall heat flux.