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Performance evaluation and parametric analysis of AMTEC/TEG hybrid system

机译：AMTEC / TEG混合系统的性能评估和参数分析

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摘要

A general mathematical model of the AMTEC/TEG hybrid system consisting of alkali metal thermal electric converter (AMTEC) and thermoelectric generator (TEG) has been developed, in which the load parameters and main geometric parameters were considered. Instead of specifying some parameters, the evaporating temperature and condensing temperature of the AMTEC as well as the operating temperature of the TEG subsystem were determined by solving energy balance equations. Restilts show that electrode current density has a quite noticeable influence on both AMTEC subsystem and TEG subsystem. The maximum conversion efficiencies for AMTEC and AMTEC/TEG are 27.42% and 31.33%, respectively. Besides, it is interesting to note that the optimal value of the ratio of thermoelectric module area to electrode area is always near 0.2 regardless of the ratio of evaporator heat transfer area to electrode area. The length of thermoelectric arms 1 and the ratio of the thermoelectric couple area to the total area of the thermoelectric module b are critical factors, b = 0.55 and l = 11 mm should be satisfied to obtain a compact and low-cost system.
机译：建立了由碱金属热电转换器（AMTEC）和热电发电机（TEG）组成的AMTEC / TEG混合系统的通用数学模型，其中考虑了载荷参数和主要几何参数。通过指定能量平衡方程式来确定AMTEC的蒸发温度和冷凝温度以及TEG子系统的工作温度，而不是指定某些参数。研究结果表明，电极电流密度对AMTEC子系统和TEG子系统均具有相当显着的影响。 AMTEC和AMTEC / TEG的最大转换效率分别为27.42％和31.33％。此外，有趣的是，无论蒸发器传热面积与电极面积之比如何，热电模块面积与电极面积之比的最佳值始终接近0.2。热电臂1的长度和热电耦合面积与热电模块总面积之比b是关键因素，为了获得紧凑且低成本的系统，应满足b≥0.55且l≤11mm。

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