Abstract
Looking for alternative energy sources has been an inevitable trend since the oil crisis, and close attentioned has been paid to hydrogen energy. The proton exchange membrane (PEM) water electrolyzer is characterized by high energy efficiency, high yield, simple system and low operating temperature. The electrolyzer generates hydrogen from water free of any carbon sources (provided the electrons come from renewable sources such as solar and wind), so it is very clean and completely satisfies the environmental requirement. However, in long-term operation of the PEM water electrolyzer, the membrane material durability, catalyst corrosion and nonuniformity of local flow, voltage and current in the electrolyzer can influence the overall performance. It is difficult to measure the internal physical parameters of the PEM water electrolyzer, and the physical parameters are interrelated. Therefore, this study uses micro-electro-mechanical systems (MEMS) technology to develop a flexible integrated microsensor; internal multiple physical information is extracted to determine the optimal working parameters for the PEM water electrolyzer. The real operational data of local flow, voltage and current in the PEM water electrolyzer are measured simultaneously by the flexible integrated microsensor, so as to enhance the performance of the PEM water electrolyzer and to prolong the service life.
Highlights
Hydrogen is very sparse in the earth’s atmosphere, and it mostly exists as compounds, such as water (H2 O), natural gas (CH4 ) and so on
The water electrolyzing hydrogen production technique is limited to the power source and electrolytic efficiency; in order to reduce the energy consumption and to increase the production rate, the proton exchange membrane water electrolyzer is emerged [3]
After long-term operation of the proton exchange membrane water electrolyzer, material durability, corrosion and low operating temperature; hydrogen canthe be membrane separated from oxygen to avoid catalyst them mixing with each the nonuniform local flow, and current in the electrolyzer can influence overall other which is dangerous
Summary
Hydrogen is very sparse in the earth’s atmosphere, and it mostly exists as compounds, such as water (H2 O), natural gas (CH4 ) and so on. After long-term operation of the proton exchange membrane water electrolyzer, material durability, corrosion and low operating temperature; hydrogen canthe be membrane separated from oxygen to avoid catalyst them mixing with each the nonuniform local flow, and current in the electrolyzer can influence overall other which is dangerous [4]. If the voltage is too high, the catalyst is destroyed by electrochemical corrosion, and if water electrolyzer, the membrane material durability, catalyst corrosion and the nonuniform local flow, the voltage is too low the reaction is incomplete. The current measuring method connect the wire tois high, the catalyst is destroyed by electrochemical corrosion, and if the voltageisistotoo low the reaction the anode and the cathode of the collector plate, and measure the voltage distribution of the incomplete. This study uses plate, and measure the voltage distribution of the proton exchange membrane water electrolyzer micro-electro-mechanical system (MEMS). Internal multiple physical information is extracted to determine the optimal working parameters for the PEM water electrolyzer
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