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Performance characteristics of a direct carbon fuel cell/thermoelectric generator hybrid system

机译:直接碳燃料电池/热电发电机混合系统的性能特征

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A hybrid system mainly composed of a DCFC (Direct Carbon Fuel Cell), a TEG (Thermoelectric Generator) and a regenerator is put forward, where the DCFC electrochemically converts the chemical energy in the solid carbon into electricity and waste heat, and the TEG further converts the waste heat into electricity for additional power generation. The main irreversibilities in each element of the hybrid system are characterized, and the heat losses between the DCFC and the environment are also considered. Numerical expressions for the power output and efficiency of the hybrid system are respectively derived, from which the general performance characteristics are revealed. The fundamental relationship between the operating current density of the DCFC and the dimensionless electrical current of the TEG is obtained, and thus the region of the operating current density of the DCFC that the TEG exerts its function is determined. By using such a system, the equivalent maximum power density of the hybrid system allows to be 50% larger than that of the sole DCFC system. The effects of the operating current density, operating temperature, heat conductivity, and some integrated parameters on the performance of the hybrid system are discussed.
机译:提出了一种主要由DCFC(直接碳燃料电池),TEG(热电发生器)和蓄热器组成的混合系统,其中DCFC将固体碳中的化学能电化学转化为电能和废热,而TEG进一步将废热转化为电能,用于额外的发电。表征了混合动力系统各要素的主要不可逆性,并考虑了DCFC与环境之间的热损失。分别推导了混合动力系统功率输出和效率的数值表达式,从中揭示了其总体性能特征。获得了DCFC的工作电流密度与TEG的无量纲电流之间的基本关系,从而确定了TEG发挥其功能的DCFC的工作电流密度的区域。通过使用这样的系统,混合系统的等效最大功率密度可以比单独的DCFC系统大50%。讨论了工作电流密度,工作温度,热导率和一些综合参数对混合动力系统性能的影响。

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