风电机舱细颗粒物运动沉积研究

STUDY ON FINE PARTICLE DEPOSITION IN WIND TURBINE CABIN

风电机舱通过加装聚风罩装置,可通过引入外部空气对机舱内发热设备进行通风冷却,降低机舱内的平均温度。但与此同时当冷却空气中夹杂灰尘颗粒时,则会在风电机舱内部发电设备上进行沉积。通过对风电机舱进行简化后建立模型,对风电机舱内含有粉尘颗粒的运动沉积特征进行三维仿真模拟计算,得到风电机舱内部颗粒浓度、温度、运动速度的三维特征变化分布云图。进而得到在含有粉尘颗粒时,冷却空气在三维机舱空间内部流动变化的规律特点。从理论上分析加装聚风导流罩后,风电机舱内夹杂固态颗粒物时对建立起的风电机舱自然循环通风冷却系统的影响特点。以便于在粉尘高温天气时对风电机组的状态监测分析,进而降低夏季高温沙尘天气时风电机组的故障率,提高风力发电公司的经济效益和社会效益。

The wind turbine cabin can be ventilated and cooled by introducing outside air to reduce the average temperature in the cabin by installing a wind collecting device.But at the same time,when the cooling air contains dust particles,it will be deposited on the power generation equipment inside the wind turbine cabin.After simplifying the wind turbine cabin,the model was established,and the three-dimensional simulation calculation of the movement and deposition characteristics of the dust particles in the wind turbine cabin was carried out.And the three-dimensional characteristic change distribution cloud map of the wind turbine cabin particle concentration,temperature,and velocity was obtained.Furthermore,when the dust particles are contained,air flow status inside the cabin also changed accordingly.And then the characteristics of the natural circulation ventilation cooling system are theoretically analyzed when the solid particles are mixed in the wind turbine cabin after the installation of the wind-gathering shroud.In order to facilitate the monitoring and analysis of the state of the wind turbine in dusty and high temperature weather,thereby reducing the failure rate of the wind turbine in high temperature and dusty weather in summer,and then it can improve the economic and social benefits.