Maintaining required performance and rated power output of proton exchange membrane fuel cells while reducing fuel consumption demands and improving efficiencies at the largest parasitic work loss contributor, namely the air compressor. In this paper, we built a high-efficiency one-dimensional match model of centrifugal compressor for proton exchange membrane fuel cells first, which was based on the fuel cell air supply system and the optimal trim factor. And then a variable map width enhancement slot design adjusted by a closed ring was first introduced to extend the surge margin and keep high efficiency. Finally, the compressor with a variable map width enhancement slot was validated at a compressor performance rig and a fuel cell simulation system. The results from compressor performance test rig indicate that the compressor peak efficiency is as high as 77% and the surge margin is enhanced by about 28.1∼ 42.7 %. The simulation results of the fuel cell system indicate the maximum power consumption of the compressor and the H2 consumption of comprehensive adapted world transient vehicle cycle are reduced by nearly 1.6 kW and 4.86%, respectively, in comparison with the baseline screw compressor.

中文翻译：

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商用车质子交换膜燃料电池系统具有可变映射宽度增强槽的高性能离心压缩机的研究

保持质子交换膜燃料电池所需的性能和额定功率输出，同时降低燃料消耗需求并提高最大的寄生功损失贡献者（即空气压缩机）的效率。在本文中，我们首先建立了质子交换膜燃料电池离心压缩机的高效一维匹配模型，该模型基于燃料电池供气系统和最佳修整系数。然后首先引入了由封闭环调整的可变地图宽度增强槽设计，以扩展浪涌裕度并保持高效率。最后，具有可变映射宽度增强槽的压缩机在压缩机性能平台和燃料电池仿真系统中进行了验证。压缩机性能试验台的结果表明，压缩机峰值效率高达77%，喘振裕度提高了约28.1~42.7%。燃料电池系统的仿真结果表明，与基准螺杆压缩机相比，压缩机的最大功耗和综合适应世界瞬态车辆循环的H2消耗分别降低了近1.6 kW和4.86%。