Figure 2

(a) Efficiency of thermoelectric modules versus total number of TEG legs. The leg thickness is set to be 10 mm. (b) Efficiency versus thickness of TEG legs, which is based on 256 (16 × 16) total number of TEG legs. (c) The required heat power versus leg thickness with various temperature differences. (d) Effects of number of TEG legs on output current, output voltage and output power. The temperature difference ΔT = 500 K and leg thickness L = 10 mm.