Energy Demand Reduction by PCM Based Plasterboard Application for Passive House in Polish Climatic Condition
Abstract
The presented theoretical considerations refer to performance of energy storage unit consisting of phase change material. Integrated to internal wall PCM based plasterboard absorbs solar radiation during daytime and releases the heat at night. The thermal characteristics of the storage unit are described. Analytic model for room, with two nodes consisting of PCM plaster board and internal air, was developed. The basic conservation equations of energy for the storage unit and internal air were provided and analytically solved. The analytical model can be a tool for PCM selection, determination of its amount, and preliminary storage unit performance evaluation. The performance study has been carried out for commercially available PCM added to internal walls and ceiling plasterboards of passive house, functioning in Polish climatic conditions. The PCM also stabilizes the level of internal air temperature during the daytime in summer months reducing cooling demand and improving room comfort both in summer and winter. The examples of PCM based plasterboards were made and experimentally tested during successive charging and discharging processes.