The summer season becomes difficult for chimney-type cooling tower. Due to the hot atmospheric air entering the apparatus, insufficient heat removal occurs, which means undercooling of water. Ultimately, this leads to a decrease in the power of the steam turbine of a thermal power plant. In the summer, an experimental study of the irregularity of the irrigation of the cooled water by the natural cooling tower was carried out. A significant irregularity in the density of irrigation over the cross section of the apparatus was established. The regression dependences of the temperature difference and cooling power are constructed taking into account the irregularity of the irrigation density. The obtained performance characteristics are tested on a laboratory model of the cooling tower. It is established that the nature of the regression models of temperature difference and cooling power from the density of irrigation of the natural cooling tower and its models are of the same nature. Thus, in a laboratory setup, confirmation of the performance of a full-scale cooling tower was obtained. Comparing the nature of the dependences of the laboratory model and the dependences of the cooling tower, it should be noted that the dependences of the temperature difference are expressed parabolic, and the cooling capacity on the density of irrigation cubic equation. The performance characteristics of a full-scale cooling tower allow us to judge its effectiveness by its sections, functioning in conditions of irregular irrigation.

The water flow rate of the cooling system of tower cooling towers is considered as a controlled parameter. Using data on the irregularity of irrigation density over the cross-section, a regression model of the operating characteristic of a tower cooling tower was obtained, which establishes the dependence of the temperature difference on the irrigation density. Based on this characteristic, the existence of an extremum of the cooling capacity of the cooling tower in terms of the flow rate of the flow is established. A mathematical analysis of the circulation flow control using shutoff valves in a single-circuit water supply system is carried out. The equation of the relationship between the flow rate of the circulating flow and the control position of the shutoff valves is given. An energy-saving method for controlling the performance of a circulation pump using frequency regulation is considered. A mathematical model of the hydrodynamics of the circulation circuit is constructed that describes the dependence of the circulation flow on the parameters of the shutoff valves and/or the frequency controller of the pump drive. A system for automatically controlling the vacuum in the condenser of a steam turbine plant is proposed. The circulation flow can serve as an optimizing and controlling parameter of the cooling capacity of the system. The developed mathematical model of a circulating system controlled by a frequency regulator of an electric drive of a circulation pump and/or shutoff valves of heat exchangers is recommended for use in solving the design and control problems of a circulating system. In automated process control systems, it can be used both for calculating the cooling capacity and unit energy consumption and in combination with regulation laws for flow control. This will improve the quality of the transition process, and, consequently, increase the efficiency and safety of production.