A schematic of the thermoacoustic heat engine is shown in Fig 1. It is made of a 50-mm diameter stainless steel alloy 304
with a total length of 42 cm filled with air at atmospheric pressure. Although studies have shown that better efficiency has
been obtained at high operating pressure (6-10 bars) with Helium or a mixture of the rare gases, this study focused on the
practical application within a rural community. The objective is to model a heat source from a combustion process (i.e.
biomass) to run a thermoacoustic heat engine generating power for local use. The stack is made from Celcor ceramic with
100 cells/in2, cut into a diameter of 50 mm, shown in Fig 2a.