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Phase change materials (PCMs) can be integrated into envelopes of buildings to reduce peak loads. However, this integration requires mathematical modeling of PCMs and whole buildings, which is essential for the optimal design and material selection. There are currently few tools of building performance simulation (BPS) with comprehensively verified and validated PCM models. This study presents the procedure of verification and validation of PCM models developed in Modelica using the approach interpreted in ASHRAE Standard 140. Among the proposed models, the arctangent function model behaved accurately against the empirical data. The model was also analytically and comparatively tested. The preliminary results showed that an accurate analysis is required when integrating PCMs into buildings because the thermal performance of the buildings depends on different parameters such as location and properties of PCMs.

Development and Validation of PCM Models Integrated Into the High Order Building Model of Modelica Library – Aixlib