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In order to reduce the adverse effects of pressure fluctuations on the service life of fuel cells, the effectiveness of adding a bypass valve to control pressure fluctuations was investigated through simulation and comparative experiments. Based on the analysis of the fuel cell output characteristics and operating principles of each component, the mechanism and control model was established. An inverted decoupling method based on active disturbance rejection was used to achieve decoupling control of flow and pressure. Pressure fluctuation control was implemented using a fuzzy PI control. The effect of decoupling control within this system structure was verified using the Matlab/Simulink platform. The peak pressure fluctuation in the comparative experiments is 1.09 kPa with the bypass valve and 1.82 kPa without the bypass valve respectively. The addition of a bypass valve can reduce pressure fluctuations, thereby increasing the service life of the fuel cell.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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