“…Based on the similar device (thermoelectric cooler, TEC) structure, thermoelectric generator (TEG), the electric power can be generated from external heat sources via thermoelectric-energy harvesting and conversion, which is expected to improve the overall utilization rate of energy. The harvesting of electrical energy from thermal energy can be used as a kind of auxiliary cooling [18][19][20][21]. Wang et al proved the principle of thermoelectric conversion using a thermal-reusing scheme in a TEG, where 5.38% of the waste heat was recovered [22].…”