In the introduction of the thesis, the overview of different heat storages and their applications is made. Moreover, the connection and implementation of the two directives, EPBD (Energy Performance Building Directive) and EED (Energy Efficiency Directive) are shown. Based on the measured data, collected in LOSK (Laboratory for Heating, Sanitary, Solar and Air Conditioning Engineering), the validation of the model is made. The model is then used to calculate heat transfer in PCM (Phase Change Material). The model was developed by the researchers from BUT Brno. The simulations were run with TRNSYS program and the model, which was created by the said researchers. The heat gains during the cooling season were simulated and compared to the gains of using a heat storage and a recuperator for a predetermined work office.
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