Background. The efficiency of heat engineering systems is determined by both their structure and operating modes. Any heat engineering system is subject to structural and parametric optimization throughout its entire life cycle (from synthesis, including operation, to disposal). Analysis of existing data shows that by now experience has been accumulated to improve the structure of systems at the stages of creation and reconstruction. The foundations have been laid for the structural perfection of non-stationary systems, as well as taking into account the different localization of individual elements of the system based on pinch technology. On the other hand, methods are known for optimizing the operating parameters of systems based on enthalpy and exergy indicators. These methods as a rule consider the system as a whole, without decomposing it into individual subsystems. It is due to the fact that the perfection of an individual system element does not always additively or multiplicatively determine the overall perfection of the system as a whole. Thus, it is a possibility in principle to use low-efficiency devices to develop perfect systems.
Materials and methods. The methods of structural and parametric optimization used today allow us to synthesize systems and search for optimal operating parameters taking into account thermo-economic indicators, such as the cost of a unit of heat, exergy and other types of energy and material resources.
Results. A method for complex optimization of heat engineering systems has been developed, allowing for complex parametric optimization of structurally differentiated systems. Using the example of the gas piston cogeneration JMS 612 GS-B.L unit, the optimal control parameters of its operation have been determined.
Conclusions. The proposed method for complex parametric optimization of structurally differentiated systems can be used both at the stage of synthesis of heat engineering systems and in the process of reconstruction. The optimal parameters of the operation of the JMS 612 GS-B.L unit determined during the study can be used during its operation.