永磁直驱风力发电机辅助散热段散热分析  

Thermal analysis on auxiliary cooling sections of a permanent magnet direct-driven wind turbine

作　　者：王丁会 刘广林[2] 杨怀宇 

机构地区：[1]国电联合动力技术有限公司,北京102206 [2]华北电力大学低品位能源多相流与传热北京市重点实验室,北京102206

出　　处：《热力发电》2014年第1期118-121,共4页Thermal Power Generation

基　　金：北京市自然科学基金项目(3122029);中央高校基本科研业务费专项资金资助(12QN20)

摘　　要：以某2.5MW永磁直驱风力发电机热损值为依据,针对100、150、200、250、300mm5种不同管径辅助散热段的散热效果进行了仿真计算。结果表明:阶增加辅助散热段可有效利用风场自然风对发电机进行散热;在单管管径为100mm时,其辅助散热段散热量最高,占总散热量的41.8%,其单位重量热负荷为16.11 W/kg。因此通过增加辅助散热段,可利用风电场优越自然风对发电机进行间接散热,有效减小原有板式换热器占用机舱的空间。On the basis of heat loss of a 2.5 MW permanent magnet direct-driven wind power gen- erator, numerical simulation on heat dissipation effects of the auxiliary cooling sections with tube diameter of 100 ram,150 ram,200 mm,250 mm and 300 mm were performed. The results showed that,the heat dissipation of each auxiliary cooling section was 41%,25.3%,31.3%,23.3% and 19.8% of the total heat dissipation of each plate heat exchanger,respectively. The heat load per u- nit mass of the auxiliary cooling section with tube diameter of 100 rnm was 16. llW/kg. There- fore, by adding auxiliary cooling section, the superior natural wind from wind farm can be used to cool the generator indirectly,thus to effectively attenuate the space that the plate heat exchanger occupied.

关 键 词：风力发电机 辅助散热段 管径 散热量 热负荷 

分 类 号：TK8[动力工程及工程热物理—流体机械及工程] TM614[电气工程—电力系统及自动化]