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Background: Deterioration of cooling abilities of cooling towers leads to a decrease in the efficiency of the technological and production equipment. Cooling capacity reserve is especially important in summer when the inflowing air is hot. According to the published data, the problem of insufficient water cooling in cooling towers has been the subject of a wide range of studies aimed at improving design and operation parameters. However, there is still not enough data about the effect of water flow distribution on the water cooling efficiency in the apparatus. Evaporative cooling towers as large installations are characterized by uneven phase distribution, which makes it necessary to determine the value of unevenness of spraying density distribution over the cross section of the cooling tower and the unevenness influence on the water cooling efficiency in the apparatus, as well as to plot the cooling tower performance curve in order to determine its efficiency taking into account the unevenness. Materials and methods: We suggest accounting for the unevenness of the spraying density distribution in a cooling tower by using the static distribution function. «Вестник ИГЭУ» Вып. 6 2016 г. ФГБОУВО «Ивановский государственный энергетический университет имени В.И. Ленина» 16 Results: It has been experimentally determined that there is significant unevenness of spraying density distribution over the cooling tower cross section. A statistical method has been developed for estimating the influence of the unevenness on the overall mass transfer coefficient of the evaporation process. Based on the statistical method of assessing the unevenness impact on the process intensity, it has been found that the higher is the value of spraying density distribution unevenness, the slower is the mass transfer. A performance curve has been plotted taking into account the spraying unevenness that can be used to determine the cooling capacity of the cooling tower. A method has been suggested to determine the performance of a cooling tower based on spraying density uneven distribution over cross sections. Conclusion: When designing and operating cooling towers, it is essential to know the law of spraying density distribution – to make calculations more precise – and performance – to assess its efficiency. Elimination of spraying density unevenness is a reserve for increasing the apparatus efficiency.

Experimental study of water cooling irregularity in the natural draft cooling tower