Resonator Shape Effect on the Performance of a Standing-Wave Thermoacoustic Heat Engine

Essam Khalil, Mahmoud Fouad, Mazen Eldeeb
2011 9th Annual International Energy Conversion Engineering Conference   unpublished
This thesis demonstrates an attempt to make a design of an about 1-meter-long thermoacoustic heat engine that has an optimum efficiency. This will be done using DeltaEC, software which was developed especially for low amplitude thermoacoustic devices modeling. The optimization process includes geometrical parameters of the resonator tube and the stack, the working fluid, and the heat input to the engine. The present optimization process has shown that slab stacks made of Celcor (a Ceramic
more » ... or (a Ceramic material) demonstrated much better performance than other stack shapes and materials. For a 1.1239-meter-long and 0.011 m2 square-shaped resonator tube, a 7.75 cm long slab stack made of Celcor having 0.304 mm-thickplates, spaced by 0.648 mm, giving a porosity ratio of 0.68067, will theoretically convert heat to acoustic power at an efficiency of 30.611% which is equivalent to 47.97% of Carnot's efficiency. The thesis ends with a brief summary of conclusions.
doi:10.2514/6.2011-5803 fatcat:slmxr5yfi5bfndijvczspa3ml4