摘要
在综合两相流、传热传质理论并结合实际运行过程的基础上,建立具有实用意义的喷雾增湿三维数学模型。结合热力学理论,计算出使进入空冷单元的空气达到饱和状态时理论上所需的临界水量,合理地选用喷嘴个数;分别将喷嘴双排纵向平行对称布置在空冷单元内,形成4种不同的喷雾增湿方案;利用CFD软件对某电厂600MW机组直接空冷单元内4种不同的喷雾增湿方案进行了三维数值模拟,得出增湿效果最佳方案。
Based on an analysis of the theory and practical operations of two-phase flow and heat and mass transfer,a 3D mathematical model of spray humidification system is established.By combining the thermodynamic theory,the theoretical critical water flow for saturating the air entering the air-unit is calculated,based on which the optimal number of nozzles is obtained.Through arrangement of the nozzles in the direct air-unit in longitudinal double rows,four different spray humidification schemes are obtained.By using the CFD software,a 3D numerical simulation was performed on the four different spray humidification schemes for the direct air-unit of a 600 MW unit and the optimum spray humidification scheme was obtained.
出处
《电力建设》
2010年第9期98-101,共4页
Electric Power Construction
关键词
空冷单元
喷雾增湿
数值模拟
气体流场
喷嘴位置
纵向双排布置
air-cooling unit
spray humidification
numerical simulation
air flow field
nozzle position
longitudinal double-row arrangement
