高功率密度车用温差电源的结构

提出了一种高功率密度温差电源的结构,其换热器的热通道内设置了十字形和弧形转换元件的高温段,有效地增加了换热面积,冷却通道采取集中冷却的形式,其中设置转换元件的低温段,通道内的换热形式是对流换热;转换元件内部设置热电偶阵列,由并联的薄臂型热电偶、金属导流片和过渡导体连接形成导电和导热回路,再经过串联提高输出电压.数值计算表明,转换元件具有良好的温度分布,内电阻显著降低,改善了温差电源的负载特性.

Structure of High-Power Density Thermoelectric Generator Used for Automobile

Proposed in this paper is the structure of a thermoelectric generator with high power density.In the hot channel of the heat exchanger,a high-temperature part of conversion elements in cross and arc shapes is set,which enlarges the heat exchange area.In the cooling channel,centralized cooling is employed and a low-temperature part of conversion elements is installed.Moreover,hot convection is adopted in both the hot and the cooling channels.Lots of thermocouple arrays are installed in conversion elements,which connect with the parallel thin thermocouples,metal deflectors and transitional wires to form a loop that transmits heat and electric currents,and some loops are contacted to increase the output voltage.Numerical results show that the conversion elements are of uniform temperature distribution as well as low resistance,so that it improves the load characteristics of the thermoelectric generator.