Abstract
Thermoacoustic heat pump is expected high reliability and long life because it has no-moving parts at a heating section. We build a thermoacoustic heat pump and measured its coefficient of performance (COP) circulating water in a hot heat exchanger. Working gas was 0.5 MPa nitrogen, and frequency was 50 Hz. The COP was defined as the ration of heating power over acoustic power delivered to the heat pump. The measured value of COP was 1.1 at 79℃.
