Study on coupling characteristics of PEMFC power generation system using chemisorption as solid-state hydrogen storage

doi:10.19799/j.cnki.2095-4239.2019.0152

Abstract

Abstract:

The power generation system based on PEMFC has been proven to be clean and efficient, which mainly consists of fuel supply and fuel cell subsystems. High-efficiency, safe and economic hydrogen storage technology is still the crucial factor affecting the large-scale practical applications of the PEMFC power generation system. The solid-state hydrogen storage method by chemisorption has the advantages of high capacity, good safety, and reversibility, thus being widely used as hydrogen sources and generally affecting the output properties of the power system. In this work, the models of the solid-state hydrogen storage reactor based on metal hydride and the PEMFC are established. Besides, the coupling process between the reactor and the fuel cell is modeled by MATLAB/SIMULINK to investigate the coupling characteristics. Based on the model, the effects of the important operating and design parameters, including hydrogen pressure, oxygen pressure, fuel cell temperature, and proton exchange membrane area, on the output performance of the power generation system are investigated. The simulation results show that the elevated temperature of the hydrogen storage reactor facilitates the improvement of power output of the system. This is because that the higher reaction temperature results in the higher hydrogen supply pressure, accordingly enhancing the fuel cell performance. In addition, the output power of the system also increases with the increase of the hydrogen pressure, fuel cell temperature and proton exchange membrane area. The corresponding power sensitivity coefficient of the three parameters is calculated to be 1.81, 0.73, and 0.036, respectively.

Key words: fuel cell, hydrogen storage reactor, numerical simulation, parameter optimization

CLC Number:

TM 911

YAN Hongli, JING Zhiliang, LU Zuowei, WANG Yuqi, WU Zhen. Study on coupling characteristics of PEMFC power generation system using chemisorption as solid-state hydrogen storage[J]. Energy Storage Science and Technology, 2020, 9(1): 152-161.

Figures/Tables 1

References 22

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