基于实际工况的燃料电池水气传输及相变规律研究  

RESEARCH ON FUEL CELL WATER AND GAS TRANSMISSION AND PHASE CHANGE LAW BASED ON ACTUAL WORKING CONDITIONS

作　　者：王来华[1] 代世勋[1] 曹爱红[1] Wang Laihua;Dai Shixun;Cao Aihong(Department of Automotive Engineering,Shandong Labor Vocational and Technical College,Ji’nan 250022,China)

机构地区：[1]山东劳动职业技术学院汽车工程系,济南250022

出　　处：《太阳能学报》2024年第3期260-268,共9页Acta Energiae Solaris Sinica

摘　　要：利用CFD软件建立二维多相质子交换膜燃料电池单电池模型,对不同工况下质子交换膜燃料电池内部水气传输及相变过程进行仿真。在试验验证及元无关性验证的基础上,分析起步工况、加速工况、急停工况下的质子交换膜燃料电池内部状态变化。研究结果表明:当电流密度为1500 mA/cm^(2)时,质子交换膜燃料电池功率密度达到最大值654.9 mW/cm^(2);起步工况下,质子交换膜燃料电池内部反应会在达到额定功率10 s后逐渐达到平衡;加速工况下,三次方加速模式的最低液态水饱和度界面、水-气相界面的持续时间最长;急停工况下,质子交换膜燃料电池的突然停机会使得其仍保持与停机前相近的状态。The dynamic load of proton exchange membrane fuel cell(PEMFC)is one of the most challenging issue for fuel cell based vehicle application.It is critical to investigate the dynamic operation mechanism for appropriate PEMFC control.This study proposes a two-dimensional multi-phase PEMFC single-cell model for the simulation of internal water and gas transmission and phase transition process under different operations.Based on the test verification and grid-independent verification,the internal state changes of PEMFC under starting conditions,acceleration conditions,and emergency stop conditions are analyzed.The results indicate that the maximum PEMFC power density reaches 654.9 mW/cm^(2) with current density 1500 mA/cm^(2).The PEMFC internal reaction will gradually reach balance after 10 s under starting conditions.Under the acceleration condition,the lowest water saturation interface and the water-gas phase interface have the longest duration in the cubic acceleration mode.Under the emergency stop conditions,the PEMFC remains similar to before the shutdown.This study guides the precise control of PEMFC in real applications.

关 键 词：质子交换膜燃料电池 相变 饱和度 二维多相模型 水气传输 水-气相界面 

分 类 号：TM911.4[电气工程—电力电子与电力传动]