Abstract
<jats:p>The subject of the study is the process of organizing and designing cooling systems for power machines that operate on the basis of the conversion of various types of energy and are part of gas turbine and steam turbine power plants. The relevance of the work is attributed to the existence of a large number of cooling methods, ventilation schemes, and scientific and technical solutions for removing excess heat from a power machine, yet, the systematization and generalization of these approaches have not been carried out specifically for turbogenerators of steam and gas turbine power plants. A comprehensive theoretical study and analysis of methods and approaches to organizing the cooling system will allow improvements in the thermal state of the power machine, extending its service life and increasing the competitiveness of the power plant as a whole. The purpose of the work is to formulate guidelines for the effective organization of excess heat removal from a power machine, using the example of a turbogenerator, based on the systematization and generalization of scientific and technical experience in designing and constructing turbogenerator cooling systems. The paper considers existing ventilation schemes for turbogenerators in the power range of 2.5 to 1200 MW, presents a general classification of cooling systems, and reviews turbogenerators types in terms of cooling methods and their power class. Additionally, mathematical models for the approximate calculation of thermo-physical properties are provided for solving practical problems in the engineering development and design of cooling system functional units for high-power machines. These models are recommended for determining coolant parameters when selecting ventilation duct geometry, assessing the thermal state at the inlet and outlet of the heat exchanger, and approximating coolant characteristics when calculating the geometry of the turbogenerators cooling fan. The scientific novelty lies in the formulation of recommendations for organizing effective turbogenerator cooling system and in the systematization and generalization of existing ventilation schemes for modern power machines. The practical value of the work lies in the provided mathematical expressions for calculating coolant operating parameters, which enable the accurate determination of the turbogenerator thermal state.</jats:p>