质子交换膜燃料电池(PEMFC)发动机循环水管理模型

MODEL FOR MANAGEMENT OF CYCLING WATER OF A PROTONEX CHANGE MEMBRANE FUEL CELL (PEMFC) ENGINE

首先测试了北京飞驰绿能电池技术有限公司设计制造的 18kWPEMFC电堆 ,得到了输出电流、电压、反应气体流量、加湿温度、电池堆上循环水入口和出口温度、以及电堆尺寸、质量等一系列参数。为了优化循环水管理 ,建立了循环水管理物理模型 ,该模型仅依赖于电堆输入和输出等宏观参数 ,不必考虑诸如质子交换膜的水迁移系数和冷却板、双极板上流场结构等微观参数。该模型在优化循环水系统配置、简化控制系统参数等方面具有一定优势。模型分析指出 ,在该发动机散热机制中 ,可以忽略热辐射以及反应物质流入流出对电池堆温度影响 ,循环水散热量占 97%。 18kWPEMFC发动机对散热器部分有较高要求 ,现阶段尚缺少燃料电池专用设备 ,采用中档轿车用散热器在经济和技术上都比较合适。为了达到快速启动目的 ,PEMFC电动汽车必须配备功率较大的二次电池 ,二次电池功率依启动时间而定。

A series of parameters such as output voltage,current,flow rate of reactant gases,humidifying temperature,temperature of the stack etc.were obtained from the measurement of a 18kW proton exchange membrane fuel cell(PEMFC) stack designed and built by the Beijing Feichi Lüneng Battery Technology Co.,Ltd.Based on the measurement a physical model was built which only depends on the parameters listed above,not on the micro-parameters such as net water-transmit-coefficient of the PEM and the configuration of the flow field.This model appears to be effective in optimizing the configuration of the water cycling system and control system.The result showed that in the heat removal pattern of cycling water heat from radiation and reactant flow can be neglected in the heat management of a 18kW PEMFC stack,since 97% of the heat removed by the cycling water.A 18kW PEMFC engine should work strictly with its matchable heat radiator ,however,at present in China there is little specific equipment suitable for PEMFC stack,it has to use a well-made radiator of a normal vehicle.For starting quickly,a PEMFC car needs a set of second battery with large power,which is determined by the starting time required.