Nekrashevych O. Automated diagnostics of the efficiency of the heat pump unit based on the criteria of exergy analysis

The thesis proposes further development of the approach to diagnosing the efficiency of the components of a heat and power system using the criteria of exergy analysis and taking into account dynamic operating modes. The scientific novelty of the obtained results of the dissertation work is: the proven possibility and expediency of using the methodology of exergy analysis in the tasks of diagnosing changes in the operational characteristics of system components and assessing the impact of this change on the efficiency of the system as a whole; further development of mathematical modeling of dynamic processes of a heat pump unit, which consists in taking into account energy losses during compression of the working fluid in the compressor and applying the criterion of exergy analysis (change in the endogenous part of exergy destruction). The obtained results of the dissertation work have also practical significance, which consists in increasing the efficiency of the heat pump unit, reducing the cost of its maintenance and the time of unscheduled and scheduled repairs, which is achieved by implementing the developed information and advisory system for automated diagnosis of the heat pump unit using the model for diagnosing the condition of components. Along with this, the results of the work are used in the educational process of the Department of Energy Process Automation of the National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute". This is confirmed by a duly executed act. In the future, the proposed criterion of exergy analysis (change in the endogenous part of exergy destruction) will be used as a key performance indicator for solving energy management problems, if it is approved by international experts and members of Technical Committee 185 "Industrial Automation".