*Proceeding Paper* **Thermal Performance Evaluation of a PCM-Integrated Gypsum Plaster Board †**

**Katarzyna Nowak 1,\*, Tomasz Kisilewicz <sup>1</sup> , Umberto Berardi <sup>2</sup> and Anna Zastawna-Rumin <sup>1</sup>**


**Abstract:** In order to design and optimize building materials containing phase changing material (PCM), it is important to accurately characterize the thermal properties of these composites: the enthalpy curve and its hysteresis. This paper presents the initial tests of these properties for a composite panel: gypsum plasterboard with an evenly distributed layer of PCM. Performance testing of the selected material was carried out by means of the dynamic method. This method (dynamic heat flow meter apparatus (DHFMA)) involves the measurement of non-stationary heat flow to determine the stored energy (enthalpy change) as a function of temperature using a stationary heat flow measurement apparatus (HFMA). This method allows for the measurement of the sensible and latent heat capacity of the products containing phase change material. In addition to presenting the obtained results, the study will discuss the practical aspects of this test method, recently introduced in the standard ASTM C 1784-20. The preliminary experiments described in the article were aimed at learning a new research technique, determining the required conditions for conducting research and the capabilities of the possessed apparatus in this regard.

**Keywords:** phase change material; PCM; dynamic thermal properties; differential scanning calorimetry; DSC method; DHFMA method
