D Kameswara Rao & B Ramakrishna – Assistant Professors
Department of Mechanical Engineering Mahatma Gandhi Institute of Technology, Hyderabad, Telagana, India.


Thermo acoustic combine thermodynamics, fluid dynamics and acoustics to describe the interactions that exist between heat and sound. Under the right conditions, these interactions can be harnessed to design useful devices that convert heat into large amplitude sound waves and vice-versa. A thermo acoustic engine turns part of the heat flowing through a temperature gradient inside a porous solid into sound waves. The work in these sound waves can then be harnessed with a piston to drive a flywheel or a linear alternator, or it can be used to transport heat from a lower to a higher temperature reservoir in what is known as a thermoacoustic heat pump or refrigerator. Two major advantages over conventional technologies: their inherent mechanical simplicity and the use of environmentally friendly working gases. Despite these qualities, most thermo acoustic engines, heat pumps and refrigerators built to this day were for research purposes, and are seldom encountered in the industry. Design and assembly of thermo acoustic engine to generate electricity using heat source, thermo acoustic engine prototype intended for low temperature electricity generation.