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

International Conference on Mechanical Engineering, Automation and Control Systems 2018

Bondar, K.E.^1 ; Suleymanov, D.F.^1 ; Laponov, S.V.^1

Ufa State Petroleum Technological University, Branch in the Sterlitamak, 2, Oktyabrya Avenue, Sterlitamak, Republic of Bashkortostan

453118, Russia^1

关键词: Air flow velocity;    Circulating waters;    Counter current;    Heat and mass transfer;    Pipeline networks;    Relative temperatures;    Small-sized device;    Temperature differences;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/560/1/012055/pdf
DOI  :  10.1088/1757-899X/560/1/012055

来源: IOP

【 摘 要 】

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.