• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 26 Issue 6
Dec.  2013
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Article Contents
GUO Ai, LI Qi, CHEN Weirong, LIU Zhixiang. Characteristics of Cathode System in Fuel Cells for Electric Vehicles[J]. Journal of Southwest Jiaotong University, 2013, 26(6): 1052-1058. doi: 10.3969/j.issn.0258-2724.2013.06.013
Citation: GUO Ai, LI Qi, CHEN Weirong, LIU Zhixiang. Characteristics of Cathode System in Fuel Cells for Electric Vehicles[J]. Journal of Southwest Jiaotong University, 2013, 26(6): 1052-1058. doi: 10.3969/j.issn.0258-2724.2013.06.013

Characteristics of Cathode System in Fuel Cells for Electric Vehicles

doi: 10.3969/j.issn.0258-2724.2013.06.013
  • Received Date: 07 May 2012
  • Publish Date: 25 Dec 2013
  • To improve the efficiency of fuel cells for vehicles, a cathode system model with a twin screw compressor was built by mass conservation, ideal gas law, and two-dimensional interpolation method. The methods to compute the air flow rate and the power of the compressor were discussed according to its rotational speed and pressure ratio. Based on the cathode system model, the influences of ambient factors on the cathode flow property and oxygen excess ratio (OER) were studied. Simulation results show that the output power and the efficiency change with the change of OER in the same way under the set conditions, and the optimal value of OER is 2.5, while the electrical efficiency decreases with OER increasing. In addition, elevated stack temperature will result in an increase in output power and a slight decrease in electrical efficiency. When the temperature elevates from 60 ℃ to 80 ℃, the output power increases by 5.03% and the electrical efficiency decreases by 0.57%.

     

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