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Optimal design of thermostat for proton exchange membrane fuel cell cooling system
Energy Conversion and Management ( IF 10.4 ) Pub Date : 2021-10-01 , DOI: 10.1016/j.enconman.2021.114800
Quangang Xia 1, 2 , Tong Zhang 1, 3 , Yuan Gao 1, 3 , XiChen Ye 1 , Ciming Guan 2
Affiliation  

The temperature conversion and control of hydrothermal system is crucial for the performance and durability of fuel cell engines. We firstly built the simulation and experiment platform for the cooling system, include confluence mode and split mode for the thermostat. Through the model calculation, in the split mode, the error of the stack outlet is about 0.8%, and the temperature shock time error is about 5%, the maximum temperature error when switching between large and small cycles is about 0.7%, and the temperature fluctuation is small in the confluence mode. The calculated results are in good agreement with the experimental results, which proved the rationality of the model. Secondly, the influence of the temperature fluctuation caused by the cycle switching of the system size on the catalyst activity and the electrochemical reaction rate is researched, by studying the different position settings of the thermostat in the system. It is found that the thermostat confluence mode increases the response speed and a wider temperature control area. Finally, based on the hysteresis characteristics of the temperature melting of the paraffin-type thermostat, the system uses an electronic thermostat to replace the thermostat. Through the optimized control strategy, temperature fluctuations are basically eliminated, and the temperature management of the cooling system is optimized.



中文翻译:

质子交换膜燃料电池冷却系统恒温器的优化设计

水热系统的温度转换和控制对燃料电池发动机的性能和耐久性至关重要。我们首先搭建了冷却系统的仿真和实验平台,包括恒温器的合流模式和分流模式。通过模型计算,分体模式下,烟囱出口误差约为0.8%,温度冲击时间误差约为5%,大、小循环切换时的最大温度误差约为0.7%,汇流模式下温度波动小。计算结果与实验结果吻合较好,证明了模型的合理性。其次,通过研究系统中恒温器的不同位置设置,研究了系统尺寸循环切换引起的温度波动对催化剂活性和电化学反应速率的影响。发现恒温汇流模式提高了响应速度和更宽的温控区域。最后,根据石蜡型温控器温度熔化的滞后特性,系统采用电子温控器代替温控器。通过优化的控制策略,基本消除了温度波动,优化了冷却系统的温度管理。发现恒温汇流模式提高了响应速度和更宽的温控区域。最后,根据石蜡型温控器温度熔化的滞后特性,系统采用电子温控器代替温控器。通过优化的控制策略,基本消除了温度波动,优化了冷却系统的温度管理。发现恒温汇流模式提高了响应速度和更宽的温控区域。最后,根据石蜡型温控器温度熔化的滞后特性,系统采用电子温控器代替温控器。通过优化的控制策略,基本消除了温度波动,优化了冷却系统的温度管理。

更新日期:2021-10-01
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