Effectiveness of CFD simulation for the performance prediction of phase change building boards in the thermal environment control of indoor spaces

► Use of CFD to simulate phase change and air movement is depicted. ► Validation errors deviate by a mean 1 °C from experimental data. ► Effects of different night ventilation configurations are explored. ► Effectiveness of PCM board is characterised via liquid fraction. ► Results offer detailed areas of improvements for design with PCM boards.