Experimental study on thermoelectric modules for power generation at various operating conditions
Experimental study on thermoelectric modules for power generation at various operating conditions
复制标题
DOI：
10.1016/j.energy.2012.06.076
复制
发表时间：
2012-09
期刊：
影响因子：
9
通讯作者：
Wei Hsin Chen;C. Liao;C. Hung;Wei Huang
中科院分区：
文献类型：
--
作者：
Wei Hsin Chen;C. Liao;C. Hung;Wei Huang
市售热电模块是回收低温废热用于发电的有用装置。为了了解热电模块（TEMs）的发电特性，对TEMs在不同流型、加热温度、水流量和模块串联数量下的性能进行了实验研究。结果表明，热沉的流型和水流量对性能的影响不显著，但热源或加热温度起着重要的作用。因此，较低的水流量，以节省电力，而较高的热侧温度，导致较大的温差，建议给予更好的TEM性能。增加串联的模块数量可提供更高的输出功率。然而，由于Peltier效应和每个模块的非均匀性，串联的模块的性能不能简单地使用线性叠加来预测。热电发电机（TEG）的功能也检查和TEM相比。研究发现，当系统温度低于150 °C时，TEM是回收余热发电的较好选择。
Commercially available thermoelectric modules are useful devices to recover low-temperature waste heat for power generation. To understand the characteristics of power generation from thermoelectric modules (TEMs), the performances of TEMs at various flow patterns, heating temperatures, flow rates of water and numbers of modules in series are studied experimentally. The results show that the effects of flow pattern of heat sink and water flow rate on the performance are not significant, but the heat source or heating temperature plays an important role. Therefore, a lower water flow rate is suggested to save power, whereas a higher hot-side temperature which leads to a larger temperature difference is recommended to give better performances of TEMs. Increasing number of modules in series provide higher output power. However, the performance of the modules in series cannot be simply predicted using linear superposition due to the Peltier effect and the non-uniformity of every module. The feature of a thermoelectric generator (TEG) is also examined and compared with the TEMs. It is found that TEM is a better choice for power generation from recovering waste heat if the temperature of a system is below 150 °C.