直线电机驱动双作用行波热声热泵的理论与实验研究

Numerical Simulation and Experimental Study on a Linear-compressor Driven Traveling-wave Thermoacoustic Heat Pump

采用蒸气压缩循环的传统热泵在较低的环境温度工况下工作时,其运行效果及效率均有所下降,对此本文首先提出了一种全新的热泵系统,即由直线电机驱动的双作用行波热声热泵环路系统,并在模拟优化计算的基础上取环路系统中的一个独立单元搭建了系统测试实验平台。通过改变运行工况,对双作用热声热泵的核心部件进行了初步测试,实验结果验证了计算模型的准确性,且实验重复性较好。在现有实验条件下,环境温度-20℃,供热温度50℃,热泵核心部件净消耗声功不超过200W,单元热泵实验台的泵热量最高可达到260 W,此时制热COP可达到2.1。通过调节声场特性改变输入到系统中的声功,在上述温度工况下可获得最大制热COP为2.4;如果环境温度升高至0℃,系统制热COP还可以提升至3.0以上。

Heat pump systems, offering economical alternatives in recovering waste heat from different sources for various industrial, com-mercial and residential applications, is considered to be a very environmentally-friendly heat and power transfer system. In this paper, to solve the problems of traditional vapor compression heat pump, a novel travelling-wave thermoacoustic heat pump （ TWTAHP） is presen-ted to meet the requirement of working in ultra-low temperature. Base on the theoretical simulation and structure optimization, we have built an experimental apparatus for preliminary test, which is only one single unit of the whole TWTAHP system. Results show that the simulation and the testing results were agreeable as expected. Under the -20℃ environment temperature and the 50℃ heating tempera-ture, we could obtain a maximal COP of 2. 1 and 260 W heat pumping capacity for one single unit by consuming acoustic power less than 200 W. Furthermore, a COP above 3. 0 was achieved when the cold temperature was raised to 0 ℃.