ASSESSMENT OF THERMAL POWER OF A DRY BLOCK COOLING TOWER WITH CHECKER AND CORRIDOR ARRANGEMENT OF PIPES IN A BUNDLE
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Abstract (English):
Evaporative cooling towers are the most widely used systems for cooling recycled water in industrial processes. A wet-cooled cooling tower is the largest consumer of water, so technologies and operating strategies are strongly recommended to optimize these devices. Replacing a wet-cooled cooling tower with a hybrid or dry one will reduce water consumption. The authors have developed and patented the design of a hybrid cooling tower. The design of a hybrid cooling tower consisting of several sections represented by heat exchanger tubes of the radiator (dry block) and contact elements in the form of corrugated plates (wet block) is described. The thermal characteristics and performance of the cooling tower are influenced by the type and location of the sprinkler fillers. The purpose of the study is to evaluate and analyze the thermohydrodynamic quantities characterizing heat transfer. The calculated dependences for determining the average heat transfer coefficient are presented. Calculations have been carried out to determine the heat transfer coefficients for different pipe arrangements in the cooling tower sprinkler unit. The thermal power of a cooling tower operating in dry mode is estimated using well-known criterion equations. Correction coefficients for calculating the Nusselt criterion are presented. Numerical modeling was used to verify the adequacy of the application of criteria equations, the influence of the location of pipes in the radiator on the cooling characteristics. It was found that the equations obtained by Mikheev M.A. most accurately describe the studied process of cooling the liquid in the sprinkler unit of a dry cooling tower using a correction factor that takes into account the relative position of the tubes. At the same time, the average deviation of the values of the total heat flow does not exceed 5.1%, and the maximum is no more than 10.2%.

Keywords:
HYBRID COOLING TOWER, HEAT EXCHANGE, TUBE BUNDLE, HEAT TRANSFER COEFFICIENT, HEAT FLOW
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