Abstract: In this study, fuel, oxidant supply and cooling systems with microcontroller units (MCU) are developed in a compact design to fit two 5 kW proton exchange membrane fuel cell (PEMFC) stacks. At the initial stage, the testing facility of the system has a large volume (2.0 m × 2.0 m × 1.5 m) with a longer pipeline and excessive control sensors for safe testing. After recognizing the performance and stability of stack, the system is redesigned to fit in a limited space (0.4 m × 0.5 m × 0.8 m). Furthermore, the stack performance is studied under different hydrogen recycling modes. Then, two similar 5 kW stacks are directly coupled with diodes to obtain a higher power output and safe operation. The result shows that the efficiency of the 5 kW stack is 43.46% with a purge period of 2 min with hydrogen recycling and that the hydrogen utilization rate µf is 66.31%. In addition, the maximum power output of the twin-coupled module (a power module with two stacks in electrical cascade/parallel arrangement) is 9.52 kW.
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Ma, H.; Cheng, W.; Fang, F.; Hsu, C.; Lin, C. Compact Design of 10 kW Proton Exchange Membrane Fuel Cell Stack Systems with Microcontroller Units. Energies 2014, 7, 2498-2514.
Ma H, Cheng W, Fang F, Hsu C, Lin C. Compact Design of 10 kW Proton Exchange Membrane Fuel Cell Stack Systems with Microcontroller Units. Energies. 2014; 7(4):2498-2514.
Ma, Hsiaokang; Cheng, Weiyang; Fang, Fuming; Hsu, Chinbing; Lin, Chengsheng. 2014. "Compact Design of 10 kW Proton Exchange Membrane Fuel Cell Stack Systems with Microcontroller Units." Energies 7, no. 4: 2498-2514.