Analysis of the Working Characteristics of the Natural Draft Cooling Tower on the Laboratory Model

Author Name(s): Ayrat . Badriev, Vilen N. Sharifullin, Andrew V. Sharifullin
Author Email: aibadriev@gmail.com

Abstract

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.

Introduction

For the cooling towers, the summer season becomes a difficult period [1, 2]. Due to the heating of the atmospheric air entering the apparatus, which is the refrigerant of the evaporation process, the temperature of the cooled water increases. Therefore, in order to achieve the required final water temperature, manufacturers resort to lower hydraulic loads. Presumably, the reason for the decline in cooling efficiency may be uneven distribution of irrigation in the cooling tower. Therefore, it was decided to conduct an experimental study of the operating characteristics of the cooling tower taking into account the uneven distribution of water irrigation over the cross section of the apparatus.

Conclusions

The operating characteristics of the cooling tower, taking into account the irregularity of the irrigation density, make it possible to evaluate the efficiency of the tower-cooling tower by actual parameters and introduce corrections when planning the hydraulic load at thermal power plants

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