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Automotive Engineering ›› 2022, Vol. 44 ›› Issue (8): 1272-1279.doi: 10.19562/j.chinasae.qcgc.2022.08.016

Special Issue: 新能源汽车技术-动力电池&燃料电池2022年

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Experimental Study on Transient Performance of Fuel Cell Air Compressor Based on Road Test Cycle Conditions

Huanhuan Bao1,2,Lei Zhang3,Qi Liu1,2(),Jianqin Fu1,2,Shuqian Wang1,Quan Wu3,Jingping Liu1,2   

  1. 1.Research Center for Advanced Powertrain Technology,Hunan University,Changsha  410082
    2.Chongqing Research Institute of Hunan University,Chongqing  401120
    3.Guangdong Guangshun New Energy Technology Co. ,Ltd. ,Foshan  528216
  • Received:2022-03-12 Revised:2022-04-08 Online:2022-08-25 Published:2022-08-25
  • Contact: Qi Liu E-mail:hnuliuqi@hnu.edu.cn

Abstract:

The real operating performance of fuel cell system directly depends on the dynamic working characteristics of its air compressor. In order to systematically analyze the changing law of the transient performance of air compressor by testing, a dynamic performance test bench for the air compressor of fuel cell is built, and a transient test condition reflecting the real operating characteristics of air compressor is devised, with which the performance of air compressor and the changing characteristics of its operating parameters under a single transient test cycle are analyzed. The results show that the operating points of air compressor in transient condition are mainly located in the middle narrow band, i.e. a high-efficiency working zone in the steady-state performance map. The inlet and outlet flow-rate difference of air compressor fluctuates drastically due to the joint-influence of pressure ratio and temperature ratio, with a larger flow-rate difference of 3.5~8.5 m3/h in high speed zone. The maximum power consumed in high-speed zone is up to 5.6 kW, causing a large parasitic loss, but its sensibility to outlet temperature change is relatively low. When the speed of air compressor sharply lowers from 9 750 r/min to 4 450 r/min, the change of flow-rate has a time lag of about 2 s.

Key words: fuel cell, air compressor, transient performance, experimental study