摘要
分析了飞轮储能系统能量、功率参数特性。飞轮储能系统单机可实现储能0.5~100kW·h、功率2~3000kW。提出了储能100kW·h级飞轮的方案,采用中低转速合金钢飞轮转子,储能密度13~18W·h/kg,计算许用应力为800MPa。尺寸为米级的飞轮转子整体锻造难度较高,可采用多圆盘轴向联接的结构设计。采用3层或4层纤维缠绕复合材料高速飞轮转子结构,分别进行了径向等应力结构设计,计算表明9000r/min三层纤维缠绕复合材料飞轮和15000r/min四层纤维缠绕复合材料飞轮均能够满足工作转速下的结构强度要求,储能密度50~70W·h/kg。
In this paper, the energy and power characteristics of a flywheel energy storage system are analyzed. Current flywheel energy storage systems could store approximately 0.5-100 kW.h energy and discharge at a rate of 2-3000 kW. Here a design of a 100kW.h flywheel is proposed. By using a low speed steel flywheel rotor with a stress limit of 800 MPa, the energy density could reach 13-18W.h/kg. With such a stress level, however, the size of the flywheel could reach the meter scale, making it difficult to manufacture. To overcome such a challenge, a multi-disc axial connection structure design was proposed. The high-speed composite flywheel rotor was designed with 3 or 4 thin cylinders made from winding fiber reinforced composite considering the radial stress optimization. Stress analyses indicated that both the 3-layer flywheel at a speed of 9000 r/min and the 4-layer flywheel at a speed of 15000 r/min would meet the structural strength requirements with an energy density at 50-70 W.h/kg.
作者
皮振宏
戴兴建
魏殿举
徐旸
PI Zhenhong;DAI Xingjian;WEI Dianju;XU Yang(Department of Engineering Physics, Tsinghua University, Beijing 100084, China;INOPE Zhongyuan Petroleum Engineering Co Ltd., Puyang 457001, Henan, China)
出处
《储能科学与技术》
CAS
CSCD
2019年第4期778-783,共6页
Energy Storage Science and Technology
基金
国家重点研发计划项目(2018YFB0905500)
关键词
飞轮储能
储能量
充放电功率
复合材料飞轮
flywheel energy storage
energy storage capacity
charging/discharging power
composite flywheel
