The Numerical Study on Air-side Flow and Heat Transfer Characteristics for Direct Air-cooled Condenser
|School||North China Electric Power University (Hebei)|
|Course||Power Machinery and Engineering|
|Keywords||direct air-cooled condenser heat exchanger element enhanced heat transfer varying condition performance|
The basic principle and related heat transfer theory for the direct air-cooled condenser was analyzed. Three-dimensional physical models have been established to represent the two basic forms of heat transfer components of air-cooled condenser in current power plants. Numerical simulation has been carried out, by using the software FLUENT, to study the air-side flow and heat transfer characteristics under different wind speed and temperature conditions. Fin surface temperature field, inter-fin velocity field and static pressure field were analyzed. Besides, to strengthen the fin heat transfer, the flow and heat transfer characteristics with and without interrupted holes were analyzed, and the comprehensive analysis and comparison was performed between simulation data and experimental data. The correlation function was gained on a certain condition. Meanwhile, this paper analyzed the varying condition performance of air-cooled condenser by using the method ofη-NTU, which is based on numerical result. This work will not only have the theoretical significance, but also the applicable value for engineering.