储能科学与技术 ›› 2025, Vol. 14 ›› Issue (5): 1946-1953.doi: 10.19799/j.cnki.2095-4239.2024.1172

• 储能材料与器件 • 上一篇    下一篇

飞轮储能系统电机定子散热设计研究

王艺斐1,3(), 徐帆1,2, 王亮1,2,3, 戴兴建1,2,3(), 徐玉杰1,2,3, 陈海生1,2,3()   

  1. 1.中国科学院工程热物理研究所，北京 100190
    2.中国科学院大学，北京 100049
    3.长时规模储能重点实验室(中国科学院)，北京 100190
  • 收稿日期:2024-12-12 修回日期:2025-02-15 出版日期:2025-05-28 发布日期:2025-05-21
  • 通讯作者: 戴兴建,陈海生 E-mail:wangyifei@iet.cn;daixingjian@iet.cn;chen_hs@iet.cn
  • 作者简介:王艺斐（1985—），男，博士，助理研究员，主要从事飞轮储能系统热管理、储热研究，E-mail：wangyifei@iet.cn；
  • 基金资助:
    十四五国家重点研发计划(2023YFB2406302)

Analysis and design on stator heat dissipation of motor in flywheel energy storage system

Yifei WANG1,3(), Fan XU1,2, Liang WANG1,2,3, Xingjian DAI1,2,3(), Yujie XU1,2,3, Haisheng CHEN1,2,3()   

  1. 1.Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
    2.University of Chinese Academy of Sciences, Beijing 100049, China
    3.Key Laboratory of Long-Duration and Large-Scale Energy Storage(Chinese Academy of Sciences), Beijing 100190, China
  • Received:2024-12-12 Revised:2025-02-15 Online:2025-05-28 Published:2025-05-21
  • Contact: Xingjian DAI, Haisheng CHEN E-mail:wangyifei@iet.cn;daixingjian@iet.cn;chen_hs@iet.cn

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摘要：

针对飞轮储能系统500 kW电机定子的散热问题，在定子外侧加装螺旋水套进行冷却；通过简化热源和传热模型，建立等效复合换热模型，并完成对电机定子的液冷设计；利用数值模拟方法快速校核设计结果，计算得到了定子内部温度分布和水套摩擦阻力。固定槽高或槽宽，增大槽宽或槽高，造成压降减小，定子的最高温度有一定上升。研究给出了设计水套槽道的尺寸，为满足定子温度要求，在一定的设计温升下，冷却水的进口温度应不超过某一值。提高冷却水设计温升，冷却水最大允许进口温度略有下降。设计方法简单高效，可为飞轮储能系统电机定子冷却设计提供参考。

关键词: 飞轮储能, 电机定子, 散热设计, 水套, 温度, 压损

Abstract:

To address the stator cooling challenges in the 500 kW flywheel energy storage motor, a spiral water jacket was installed on the outside of the stator. By simplifying the heat source and heat transfer model, an equivalent composite heat exchange model was established to optimize the liquid cooling design of the motor stator. Numerical simulations were conducted to validate the design, and the internal temperature distribution of the stator and friction resistance of the water jacket were calculated. When either the channel height or the channel width is fixed, increasing the other dimension increases the channel width or height, resulting in a reduced pressure drop and increased stator temperature. The optimized water channel dimensions establish critical operational limits, requiring the coolant flow rate and temperature to remain below certain values to meet the stator temperature requirements. Increasing the design temperature rise of the cooling water slightly decreased the maximum allowable inlet temperature of the cooling water. This simple and efficient design method provides a reference for the development of stator cooling systems for flywheel energy storage applications.

Key words: flywheel energy storage, motor stator, design of heat dissipation, water jacket, temperature, pressure loss

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