The design of the small-sized apparatus of cooling circulating water

Abstract

The article reviews the information on cooling the circulating water in tower coolers. It is shown that is the use of local re-cooling systems is the most relevant (small-sized devices) as they do not demand any expensive operation of extended pipeline networks, minimize emissions in the atmosphere. The designs of small-sized coolers and contact devices are also presented in this article. Currently, the used counterflow coolers have some drawbacks. The article proposes a cooling tower with a mixed current. A part of the air goes along the screw, and a part goes up helping to increase heat and mass transfer. Experiments were conducted and a comparative graph of the ratio of relative change in temperature of return water of the air flow rate was made to design the minicooler with a screw air flow in comparison with counterflow coolers. For the studied small-sized coolers in the range of ascending air flow rates up to 0.7 m/s, the relative temperature drop of the water is kept approximately in the same ratio. In the range of air flow velocities from 0.8 to 2.4 m/s, the increase in the value of the relative temperature drop of the water is more intense in the minicooler with a screw airflow. For example, at an air velocity of 1.4 m/s, the temperature difference for a minicooler with a screw air flow is 0.27. At the same time, in the specified value of the air flow velocity, the relative temperature of the water in the countercurrent minicooler is 0.24.