냉각탑 토출구 인덕션 시스템의 백연 저감에 관한 수치해석

To date, the demand for plume reduction at the outlet of cooling tower has been continuously increased to overcome the air pollution and visual discomfort. The main objective of present study is to investigate the plume reduction for different induction systems by using a commercial CFD code (FLUENT V.16.1). The three-dimensional geometry data and industrial operating conditions were supported by KIMCO to calculate thermo-fluid flows. The user-defined function was programmed to simulate the heat and mass transfer in the filler region of cooling tower. From the numerical results, it was found that the outlet gas mixing rate with ambient air increased with the contact area of cylinder. In particular, the grid number density having relative humidity over 100% decreased at the outlet surface due to mixing with the additionally induced ambient air. Moreover, the venture effect on induction system enhanced the vertical momentum of outlet air to prevent the recirculation problem. Finally, these CFD results would be useful in designing the induction system for plume reduction.