垂直轴风力机在不同运动状态下的电加热融冰策略研究  

Study on electric heating ice-melting strategy of vertical axis wind turbine under different motion states

作　　者：张汉文 罗日成[1] 刘志勇 Zhang Hanwen;Luo Richeng;Liu Zhiyong(College of Electrical and Information Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410114

出　　处：《可再生能源》2021年第11期1495-1501,共7页Renewable Energy Resources

基　　金：湖南省教育厅资助科研项目(15C0031)。

摘　　要：当存在气流时,垂直轴风力机中各叶片附近的空气流场存在差异,各叶片表面不同的对流散热损耗将导致各叶片的电热融冰速度不一。针对上述特点,文章以升力型三叶片垂直轴风力机为研究对象,结合流体力学和传热学相关理论,建立了风力机电加热融冰二维数值仿真模型,提出了基于垂直轴风力机不同运动状态的电加热融冰策略。在该融冰策略中,当风力机处于静止时,控制系统根据风力机中各叶片的攻角来调整各叶片的电加热功率,并根据叶片表面的融冰状况来调节叶片两侧电热元件的功率分配;当风力机处于旋转时,控制系统通过跟踪风力机中各叶片的攻角来动态调节各叶片两侧电热元件的功率分配。相比恒定功率融冰,文章所提出的融冰策略能够在一定程度上提升风力机的融冰速度,减少电能损失。In the presence of airflow,the air flow field near each blade of the vertical axis wind turbine(VAWT)is different,different convection heat loss on each blade surface will lead to different electric heating ice-melting velocity of each blade.To explore the better de-icing effect,the electric heating ice-melting strategy based on the state of motion of the VAWT is proposed.Based on the three-blade Darrieus-type VAWT,the 2-D electric heating ice-melting model is established according to the theory of fluid mechanics and heat transfer.In the de-icing strategy,when the VAWT is stationary,the control system adjusts the electric heating power of each blade according to the attack angle of each blade of the VAWT,and adjusts the power distribution of the electric heating elements on both sides of the blade according to the ice-melting condition on the blade surface;When the VAWT is rotating,the control system dynamically adjusts the power distribution of the electric heating elements on both sides of each blade by tracking the attack angle of each blade of the VAWT.Compared with the constant power electric heating ice-melting strategy,the electric heating ice-melting strategy proposed in the paper can improve the ice-melting speed of the VAWT and reduce the power loss to a certain extent.

关 键 词：垂直轴风力机 电加热融冰 数值模拟 气流 运动状态 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]