Abstract
According to finite-time thermodynamics, an irreversible high temperature proton exchange membrane fuel cell (HT-PEMFC) model is established, and the mathematical expressions of the output power, energy efficiency, exergy efficiency and ecological coefficient of performance (ECOP) of HT-PEMFC are deduced. The ECOP is a step forward in optimizing the relationship between power and power dissipation, which is more in line with the principle of ecology. Based on the established HT-PEMFC model, the maximum power density is obtained under different parameters that include operating temperature, operating pressure, phosphoric acid doping level and relative humidity. At the same time, the energy efficiency, exergy efficiency and ECOP corresponding to the maximum power density are acquired so as to determine the optimal value of each index under the maximum power density. The results show that the higher the operating temperature and the doping level, the better the performance of HT-PEMFC is. However, the increase of operating pressure and relative humidity has little effect on HT-PEMFC performance.
Highlights
In recent years, proton exchange membrane fuel cells (PEMFCs) have been considered efficient and clean energy conversion devices
According to the operating temperature, PEMFC can be divided into low temperature proton exchange membrane fuel cell (70–95 ◦ C) and high temperature proton exchange membrane fuel cell (120–200 ◦ C)
The results showed that the operating temperature and doping level have significant effects on the performance of HT-PEMFC
Summary
Proton exchange membrane fuel cells (PEMFCs) have been considered efficient and clean energy conversion devices. The effects of operating temperature, operating pressure and proton exchange membrane water content on the optimal performance of the irreversible proton exchange membrane fuel cell were numerically studied. If the film thickness was the same, the exergy efficiency of PEMFC is improved with the increase of operating pressure and the decrease of current density. Guo et al [19] analyzed the energetic, exergetic and ecological performance of HTPEMFC and mathematical models of power density, entropy production rate and ecological coefficient of performance were established based on finite time thermodynamics theory. Lin et al [27] investigated the exergy efficiency of HT-PEMFC using the meta-heuristic technique, and an improved collective animal behavior algorithm was utilized to evaluate and optimize the thermodynamic irreversibility, exergy efficiency and output power. The effects of operating temperature, operating pressure, relative humidity and doping level on the performance of HT-PEMFC were studied
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
