TY - GEN
T1 - Low-Load Performance Analysis and Improvement Method of Automotive PEMFC System
AU - Wang, Xuanyu
AU - Han, Kai
AU - Li, Xiaolong
AU - Ke, Chang
AU - Lv, Bao
AU - Tan, Hongxia
AU - Ye, Zhaonian
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
PY - 2023
Y1 - 2023
N2 - Centrifugal compressors are widely used in automotive proton exchange membrane fuel cell (PEMFC) systems. Increasing the rotating speed of compressor could avoid surge under low-load conditions of PEMFC at the cost of reduced system net efficiency through increasing compressor power consumption accounting for more than 50% of the whole system. This paper proposes an Air-Bypass scheme to improve the efficiency of the PEMFC system under low-load conditions and employs a system model of a 60 kW PEMFC system with the GT-SUITE software. The influences of the Air-Bypass scheme on the operating point and power consumption of compressor, the oxygen excess ratio and the system net efficiency are analyzed. The results show that under the operation of ensuring a reasonable oxygen excess ratio under low-load conditions, the Air-Bypass scheme not only avoids compressor surge, but also reduces power consumption. In addition, Air-Bypass scheme makes the highest efficiency point of the PEMFC system reduced from 150 A to 50 A and the system efficiency of 20 A increased by 25%, which effectively improves the efficiency of PEMFC system under low-load conditions.
AB - Centrifugal compressors are widely used in automotive proton exchange membrane fuel cell (PEMFC) systems. Increasing the rotating speed of compressor could avoid surge under low-load conditions of PEMFC at the cost of reduced system net efficiency through increasing compressor power consumption accounting for more than 50% of the whole system. This paper proposes an Air-Bypass scheme to improve the efficiency of the PEMFC system under low-load conditions and employs a system model of a 60 kW PEMFC system with the GT-SUITE software. The influences of the Air-Bypass scheme on the operating point and power consumption of compressor, the oxygen excess ratio and the system net efficiency are analyzed. The results show that under the operation of ensuring a reasonable oxygen excess ratio under low-load conditions, the Air-Bypass scheme not only avoids compressor surge, but also reduces power consumption. In addition, Air-Bypass scheme makes the highest efficiency point of the PEMFC system reduced from 150 A to 50 A and the system efficiency of 20 A increased by 25%, which effectively improves the efficiency of PEMFC system under low-load conditions.
KW - Bypass valve
KW - Low-load
KW - Oxygen excess ratio
KW - Proton exchange membrane fuel cell
KW - Single-stage compressor
UR - http://www.scopus.com/inward/record.url?scp=85142754640&partnerID=8YFLogxK
U2 - 10.1007/978-981-19-3842-9_41
DO - 10.1007/978-981-19-3842-9_41
M3 - Conference contribution
AN - SCOPUS:85142754640
SN - 9789811938412
T3 - Lecture Notes in Electrical Engineering
SP - 529
EP - 545
BT - Proceedings of China SAE Congress 2021
PB - Springer Science and Business Media Deutschland GmbH
T2 - China SAE Congress, 2021
Y2 - 19 October 2021 through 21 October 2021
ER -