建立了适用于工程分析的热电直接转换系统模型,给出了内置式强化温差发电器的结构和数学描述,对发电器通道内的对流换热和阻力特性进行了数值计算,得出了对流换热系数、温度和压力的变化趋势,并与外置式温差发电器的换热特性进行了比较.数值分析表明：内置转换元件可以有效地增大换热面积和对流换热系数,改变元件的截面形状可以得到较低的流通阻力和压降,使温差发电器的热电转换性能得以强化.

In this paper,a system model of direct thermoelectric conversion applicable to project analysis is established,and the structure and mathematical description of the internal enhanced thermoelectric generator are presented.Moreover,the variation trends of convective heat transfer coefficient,temperature and pressure in the generator channel are obtained through the numerical calculation of convection heat transfer and resistance characteristics.The results are finally compared with those of the external thermoelectric generator.Numerical analyses show that the components set in the channel effectively improve the heat transfer area and convection heat transfer coefficient,and that the shape change of the channel cross section may result in lower flow resistance and pressure drop,thus enhancing the thermoelectric conversion properties.