In this thesis, the dynamic modeling of a compact HVAC unit is presented. The unit integrates heating, ventilation, and domestic hot water preparation into a single system. The aim of the research was to develop a mathematical and numerical model that, based on dynamic modeling, enables the calculation of hourly heat flux values and the monitoring of the device’s energy performance throughout the entire year of operation. The model was developed using meteorological input data from the Slovenian Environment Agency (ARSO) and a dynamic model of a test building created in the ESBO software, which provided hourly heat flux values. Based on these data, physical and numerical models of the individual components of the device were developed. Using the obtained results, energy balance calculations of the device were performed for various operating conditions, and the total annual energy consumption was evaluated. The developed computational tool enables the assessment of a building’s energy efficiency equipped with an integrated compact unit, thereby contributing to the optimization of technical building systems and the reduction of energy consumption.
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