碱金属热电转换器性能四参数评价方法

为了解决太阳热能发电器件碱金属热电转换器的性能评价问题,从热化学角度定义碱金属钠蒸汽饱和状态和过热状态,提出4个通用的性能评价参数:循环热效率、热电转换效率、实际总效率和电功增加率,并对单管碱金属热电转换器装置的性能进行测试和分析,发现它的循环热效率可达到卡诺循环效率的99%,可与斯特林热机相匹敌,并且在923~1073K内热电转换效率都高于89%。

Assessment with Four Parameters on Performance of Alkali Metal Thermoelectric Converter

Alkali Metal Thermoelectric Converter（AMTEC） is a solar thermal power generation device.Nowadays,there are two devices in different ways of working.In order to compare their performances,according to the thermo-chemical principles, the concept of hot saturation state of sodium vapor is introduced to the circulatory system.Then there are four common performance parameters found,such as cycle thermal efficiency,thermal-to-electronic efficiency,actual overall efficiency and the increase rate of output power.The performance parameters of a single tube AMTEC device are tested.As a result,its cycle thermal efficiency is as high as 99% of Carnot cycle efficiency and thermal-to-electronic efficiency is above 89% between 923 and 1073.Therefore,AMTEC is the same as another kind of Stirling heat engines.