Experimental analysis on the back pressure of the direct air-cooled power generating unit in the upstream of the ambient wind
The direct air-cooled power generating units constructed together in the ambient wind are influenced by the cluster effect of the axial flow fan cluster and the exhaust hot air recirculation simultaneously.The coupling effects lead to complex variations of fan cooling capacity in different areas of the air-cooled condensers(ACCs).For the 2×330MW direct air-cooled units operation under the summer dominant wind,the axial flow fan cluster was divided into nine regions,in which the experiments of the thermal performance of the units on the fan cluster portion operation were carried out and the operating parameters of the power generating unit itself,the axial flow fan speeds,and the environmental parameters were considered.Therefore,the influences of experimental variables on the back pressure of the direct air-cooled power generating unit in the upstream of the ambient wind were obtained quantitatively based on the grey relational analysis approach,and the important influencing experimental variables were selected as the inputs of the least squares support vector machine(LS-SVM)model,which was established for the back pressure prediction with high reliability and effective noise suppression generated by the input parameters.Results showed that the speeds of the different portions of fans on the axial flow fan cluster influenced the back pressure differently.It is found that the portion operation from the outer to center should be carried out on the axial flow fan cluster for the unit optimization,which meant the speeds of the fans on the portions affected by the exhaust hot air recirculation should be reduced appropriately and the speeds of the fans on the portions in the upstream of the ambient wind should be increased appropriately.
Air-cooled condenser (ACC) Axial flow fan cluster Back pressure Portion operation
Lihua LIU Xiaoze DU Yongping YANG Lijun YANG Xinming XI Zelin XU
Key Laboratory of Condition Monitoring and Control for Power Plant Equipment(North China Electric Po Energy and Environmental Research Institute of Guodian Co.,Beijing,China
国际会议
桂林
英文
1-23
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）