为了将余热回收与温差发电技术结合起来，建立了一套热回收系统，该系统在回收热的同时还可以发电。建立了相应试验系统，分别采用3组不同流量的冷却水对发电片冷端进行降温，同时收集热量。得出了回收热量和电量与余热温度及水流量之间的关系式，调节冷却水流量可以调节电能与热能回收的比例。研究表明：应尽量使温差发电片冷热两端温差在大于30 ℃的工况下运行，此时电量和热量回收效率均较高。

To combine waste heat recovery with thermoelectric power generation,a heat recovery system has been established in this paper to recover heat and generate electricity at the same time.A corresponding testing system has been established,and using cooling water with 3 different flow rates to cool the cold end of thermoelectric elements and collect heat.The relationships among heat recovery and electric quantity and the temperature of waste heat and water flow rate are obtained.The ratio of electric energy and heat energy recovery can be adjusted through the cooling water flow rate.The study shows that when the temperature difference between the two ends of the thermoelectric power generation chip is more than 30 ℃,the electric quantity and heat recovery efficiency reach their maxima.

TK115