The open source Modelica package for a specific type of phase change material (PCM) ventilation unit is developed. The model is built of components from Modelica Standard Library (MSL) and IBPSA library as a part of Termonet library aiming at opensource models for household owners and utility companies to help to integrate sustainable technologies into district energy networks. The PCM heat exchanger model instantiating IBPSA library fluid components are compared to MSL PCM implementation with no fluid components and the Matlab-inspired textual Modelica model. MSL-based and textual models are shown to produce identical results, whereas account of fluid properties leads only to a slight deviation. This can motivate the use of the MSL and IBPSAbased models as a control and emulator models in Model Predictive Control. Essential fluid models from IBPSA library can be compiled and simulated using OpenModelica with minimal tuning, which shows the potential of the IBPSA library as a fully opensource building performance simulation tool.
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