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A parametric comparison of three fuel recirculation system in the closed loop fuel supply system of PEM fuel cell
- Source :
- International Journal of Hydrogen Energy. 44:7518-7530
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Anodic fuel recirculation system has a significant role on the parasitic power of proton exchange membrane fuel cell (PEMFC). In this paper, different fuel supply systems for a PEMFC including a mechanical compressor, an ejector and an electrochemical pump are evaluated. Furthermore, the performances of ejector and electrochemical pump are studied at different operating conditions including operating temperature of 333 K–353 K, operating pressure of 2 bar–4 bar, relative humidity of 20%–100%, stack cells number from 150 to 400 and PEMFC active area of 0.03 m 2 –0.1 m 2 . The results reveal that higher temperature of PEMFC leads to lower power consumption of the electrochemical pump, because activation over-potential of electrochemical pump decreases at higher temperatures. Moreover, higher operating temperature and pressure of PEMFC leads to higher stoichiometric ratio and hydrogen recirculation ratio because the motive flow energy in ejector enhances. In addition, the recirculation ratio and hydrogen stoichiometric ratio increase, almost linearly, with increase of anodic relative humidity. Utilization of mechanical compressor leads to lower system efficiency than other fuel recirculating devices due to more power consumption. Utilization of electrochemical pump in anodic recirculation system is a promising alternative to ejector due to lower noise level, better controllability and wide range of operating conditions.
- Subjects :
- Materials science
Hydrogen
Renewable Energy, Sustainability and the Environment
Nuclear engineering
Energy Engineering and Power Technology
chemistry.chemical_element
Proton exchange membrane fuel cell
02 engineering and technology
Injector
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Anode
law.invention
Fuel Technology
chemistry
Operating temperature
law
Range (aeronautics)
Relative humidity
0210 nano-technology
Gas compressor
Subjects
Details
- ISSN :
- 03603199
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- International Journal of Hydrogen Energy
- Accession number :
- edsair.doi...........938f86fa7283345b63abd9c1334129e2