Title :
Back pressure match and optimization for high pressure PEMFC engine
Author :
Fengxiang Chen ; Ling Liu ; Xing Chen ; Sichuan Xu ; Tong Zhang
Author_Institution :
Clean Energy Automotive Eng. Center, Tongji Univ., Shanghai, China
fDate :
Aug. 31 2014-Sept. 3 2014
Abstract :
This paper analyses the back pressure match and optimization using a regulated back-pressure valve (BPV) for the cathode outlet flow in a high pressure PEMFC engine. At a given power, the cathode input and output flow rate determine the cathode pressure, and consequently determine the compressor power consumption. In order to maintain a high efficiency during operation, the BPV has to be adjusted to the operating conditions. In this paper, a detailed nonlinear dynamic model of BPV is provided firstly. Then, the optimized back pressure and the angular of the valve have been got at a given power. Finally, the diameter of the valve is regulated to find a value which adjusts to a wide range of the opening, about 0 to 50%. The simulations show that using the regulated BPV can improve the system performance.
Keywords :
compressors; electrochemical electrodes; optimisation; proton exchange membrane fuel cells; back pressure match; cathode outlet flow; cathode pressure; compressor power consumption; high pressure PEMFC engine; nonlinear dynamic model; operating conditions; regulated back-pressure valve; Cathodes; DC motors; Fuel cells; Manifolds; Mathematical model; Optimization; Valves; PEMFC; back-pressure valve; nonlinearity; optimization;
Conference_Titel :
Transportation Electrification Asia-Pacific (ITEC Asia-Pacific), 2014 IEEE Conference and Expo
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-4240-4
DOI :
10.1109/ITEC-AP.2014.6940814
