Numerical analysis of thermoacoustic heat pump driving by prime mover

In this work, based on the compressible SIMPLE algorithm, a calculation model of the combined thermoacoustic engine was established. The results presented the changes in thermoacoustic engine evolution process before and after adding the refrigerator part. Subsequently, the flow field in the oscillation period of the thermoacoustic engine-driven refrigerators was analyzed, and it was found that during the flow velocity transformation, the velocity interface was formed near the middle position of the resonant tube. Additionally, the performance optimization of the thermoacoustic engine-driven refrigerator was studied. It can be found that the added refrigerator part will increase the start-up temperature difference by more than 25 K, as well as decreasing the vibration amplitude at stable stage. The temperature difference between the two ends of the refrigerator part increases with the addition of the temperature difference of the engine. This work provides a useful reference for the application of thermoacoustic engine to drive the same type of refrigerator.