Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (9): 2069-2076.doi: 10.13229/j.cnki.jdxbgxb20220340

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Purge strategy optimization and verification of PEM fuel cell engine based on AMESim simulation model

Jing DU(),Hong-hui ZHAO,Yu-peng WANG,Tian-wei DING,Kai WEI,Kai WANG,Ling-hai HAN()   

  1. General R&D Institute，China FAW Group Co. ，Ltd. ，Changchun 130013，China
  • Received:2022-03-30 Online:2022-09-01 Published:2022-09-13
  • Contact: Ling-hai HAN E-mail:dujing1@faw.com.cn;hanlinghai@faw.com.cn

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Abstract:

In order to improve the hydrogen utilization rate of fuel cell engines， a fuel cell anode loop model was developed based on the AMESim platform,and completed model integration and calibration. Based on practical engineering experience, a new purging strategy that correlates anode loop temperature, pressure and reaction current was proposed. Using the anode loop model of the fuel cell engine, the parameter optimization boundary was calculated, and the optimization and fitting of the purge control parameters was completed. According to the simulation results， compared with the original purge strategy， the new strategy can make the hydrogen consumption rate decrease from 0.866 kg to 0.8 kg per 100 km under NEDC cyclic condition， and the theoretical economy can be improved by 7.5%. Then the new strategy was verified on a fuel cell vehicle， and the hydrogen consumption rate is 0.81 kg per 100 km， which is basically consistent with the simulation results. The driving range of the vehicle is increased from 484 km to 510 km， by 5.4%. And the effectiveness of model-based purge strategy optimization scheme is verified.

Key words: fuel cell vehicle, simulation, AMESim modeling, purge strategy, hydrogen utilization optimization

CLC Number: 

  • U469.72

Fig.1

Fuel cell anode loop topography"

Fig.2

Comparison between simulation andreal of valve injection rate"

Fig.3

Comparison between simulation and real of pump circulation rate"

Fig.4

Fixed period purge strategy"

Fig.5

Calibration results of fuel cell enginecharacteristics"

Fig.6

Fuel cell anode loop purge strategy"

Fig.7

Critical hydrogen concentration ofvoltage attenuation"

Fig.8

Matching results of purge coefficients"

Fig.9

Hydrogen utilization rate comparison of different purge strategy"

Fig.10

Hydrogen concentration comparison ofdifferent purge strategy"

Fig.11

Stack voltage comparison of different purge strategy"

Table 1

Power demand distribution of NEDC condition"

功率/kW比例/%功率/kW比例/%

0

2

4

6

8

0.00

9.18

60.85

5.43

6.66

10

15

20

25

30

4.03

3.79

3.74

6.32

0.00

工况均值/kW5.12

Fig.12

Hydrogen consumption rate comparison under NEDC condition of different purge strategy"

Table 2

Basic vehicle parameters"

参数数值参数数值
整备质量/kg1769风阻系数0.33
满载质量/kg1939滚阻系数0.007
轴距/mm2700轮胎半径/mm353
迎风面积/m21.88电池容量/（kW·h）9.4
氢瓶容积/L104氢瓶压力/MPa70

Fig.13

Vehicle power stream topography"

Fig.14

Bench test of fuel cell vehicle"

Fig.15

Hydrogen consumption rate under NEDC condition"

Fig.16

Vehicle SOC trend under NEDC condition"

Fig.17

Vehicle all-electric drive SOC trend undersingle NEDC condition"

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