Minor Losses Of Cone Segments Insertion Into Single Loop Thermoacoustic Engine Model

Abstract

A thermoacoustic engine model has been built with Delta-EC simulation. This engine model is designed with a specific capability to utilize heat source from flue gas of low-grade biomass combustion. This engine model considered has a promising feature for low cost implementation according to the fact that the low-grade biomass abundantly available at rural area in the form of agricultural waste. This engine model is an improved version of a previous one, with the addition of two conical segments in two location at the engine’s loop. The cone segments lower the energy loss which in turn improve the overall performance of the engine, compared to the model installed with the straight segments. On a certain setting of the engine’s model parameters, their addition be able to slightly decreasing the acoustic energy loss occurred at loop ends and both cold and hot heat exchangers interface. The cone segments increase the engine performance by reducing the acoustic energy loss of 0.2 W, which is 0,3% lower than those with straight segment.  In general, overall heat to acoustic conversion efficiency of the model is slightly increase from 6.97% to 7.01%.