Abstract
Thermal storages that use phase-change materials are increasingly applied in heating systems with renewable energy sources. Their main advantage is storing energy of a high density while keeping the storage at lower temperatures. To exploit the full potential, optimal control is applied, which requires an appropriately designed model of the heating system. This paper proposes a model of the latent stratified storage in a mixed logical dynamical form. The proposed model is developed and verified on a real heating pilot system with a latent heat storage. Thermodynamic behaviour of this system is simulated, both by using mixed logical dynamical model and a non-linear thermodynamical model. Obtained results show high accuracy of the models.
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