Authors: E.Yu. Temnikova, A.R. Bogomolov, V.A. Taraimovich, O.A. Cherginets

Title of the article: Evaluation of the efficiency of cooling towers of the CHP

Year: 2023, Issue: 6, Pages: 21-30

Branch of knowledge: 2.5.9. Methods and devices for monitoring and diagnosing materials, products, substances and the natural environment

Index UDK: 66.045.53

DOI: 10.26730/1999-4125-2023-6-21-30

Abstract: Water-circulation cooling systems, including cooling towers, are one of the important components of rational water use of stations. Since the efficiency of evaporative cooling towers, especially during high atmospheric temperatures, has a huge impact on the ability of the station to operate with installed capacity without restrictions, on the rational use of fuel and water resources, on the amount of emissions of harmful substances into the atmosphere, etc.. The purpose of the work is an experimental study of the operation of two tower cooling towers of a thermal power plant having various sprinklers, drop traps, the area of the air inlet windows with all other parameters being equal and determining their efficiency by the cooling depth of the unit volume consumption per unit time. A methodology for conducting research and measurements has been developed, measuring instruments have been used and full-scale tests of the efficiency of cooling towers in the summer period have been carried out. Based on the measured flow and temperature parameters of water and air, as well as its humidity characteristics, the values of hydraulic load, specific air flow, thermal power of the mass exchange process of evaporative cooling, the amount of evaporated water, etc. are calculated. It is shown that the thermal power (cooling of the amount of water per degree) of the cooling tower No. 6 is higher than No. 4. At the same time, the temperature difference of the water t was greater at the cooling tower. No. 4. Cooling tower No. 6 has a large hydraulic load per unit of air flow. The heat and mass transfer process in cooling tower No. 6 is carried out efficiently. The amount of evaporated water calculated by two methods: by changing the parameters of the air in the evaporation process and by the direct thermal balance of the water temperature changes are practically the same. The comparison method showed that the amount of evaporated water in cooling tower No. 6 is greater than in cooling tower No. 4. The thermal efficiency according to the method of limiting water cooling based on reaching the theoretical air temperature of a wet thermometer was obtained higher for cooling tower No. 4 (Berman et al.). Another technique, reflecting the most characteristic assessment of the efficiency of the evaporative cooling tower, based on the coefficient of thermal efficiency in terms of enthalpy change or air moisture content, showed that the process in cooling tower No. 6 is more efficient, which is consistent with the amount of evaporated water and the thermal capacity of the evaporation plant.

Key words: cooling tower cooling water of the water cycle evaporative cooling cooling tower efficiency

Receiving date: 29.11.2023

Approval date: 10.12.2023

Publication date: 21.12.2023

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