机车用350kW燃料电池热管理系统设计

Design of 350 kW Fuel Cell Thermal Control System for Locomotive

针对机车平台整体功率高、工作温度跨度大、运用环境恶劣等特点,设计了匹配350kW燃料电池系统的热管理系统。根据机车空间布局与燃料电池系统功能划分进行热管理系统结构搭建,并针对电堆冷却循环、电力电子冷却循环、低温冷启动循环等3个主要功能循环的换热需求进行了分析计算,最终根据换热需求和匹配的部件特性给出不同工况的运行模式与控制策略。通过集成化、模块设计、策略优化的系统设计,满足了有限车体空间内大功率散热需求,并能够实现零度以下低温冷启动,拓宽了既有轨道交通车辆燃料电池热管系统的功率等级和工作温度范围。

According to the characteristics of locomotive platform,such as high overall power,large working temperature span and bad operating environment,a thermal management system matching 350 kW fuel cell system was designed.According to the space layout of locomotive and the functional division of fuel cell system,the structure of thermal management system was built,and the heat exchange requirements of three main functional cycles,including stack cooling cycle,power electronics cooling cycle and low temperature cold start cycle,were analyzed and calculated.Finally,according to the heat exchange demand and the characteristics of matching parts,the operation mode and control strategy of different working conditions were given.Through the integrated,modular design and strategy optimization system design,the system could meet the high-power heat dissipation requirements in the limited vehicle space,and could realize the cold start at low temperature below zero,and broaden the power level and working temperature range of the fuel cell heat pipe system of the existing rail transit vehicles.