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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/13255

Title: Energy harvesting from a standing wave thermo-acoustic-piezoelectric resonator
Authors: Smoker, J. ,
Nouh, M.
Aldraihem, O.J.
Baz, A.
Keywords: Acoustic fields; Acoustic resonators; Acoustic waves; Conversion efficiency; Crystal resonators; Energy conversion; Flow visualization; Piezoelectricity; Power generation; Solar energy; Structural dynamics; Thermal energy; Thermal gradients; Velocity measurement; Waste heat
Issue Date: 2010
Publisher: ASME
Citation: 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2010, Article number 2010-3066
Abstract: In this paper, a one-dimensional thermo-acoustic-piezoelectric (TAP) resonator is developed to convert thermal energy, such as solar or waste heat energy, directly into electrical energy. The thermal energy is utilized to generate a steep temperature gradient along a porous stack which is optimally sized and placed near one end of the resonator. At a specific threshold of the temperature gradient, self-sustained acoustic waves are generated inside the resonator. The resulting pressure fluctuations excite a piezoelectric diaphragm, placed at the opposite end of the resonator, which converts the acoustic energy directly into electrical energy without the need for any moving components. The theoretical performance characteristics of this class of thermo-acoustic- piezoelectric resonators are predicted using the DeltaEC (Design Environment for Low-amplitude Thermoacoustic Energy Conversion) Software. These characteristics are validated experimentally on a small prototype of the system. Particular emphasis is placed on monitoring the temperature field using infrared camera, the flow field using particle image velocimetry, the acoustic field using an array of microphones, and the energy conversion efficiency. Comparisons between the theoretical predictions and the experimental results are also presented. The developed theoretical and experimental techniques can be invaluable tools in the design of TAP resonators for harvesting thermal energy in areas far from the power grid such as nomadic communities and desert regions for light, agricultural applications, air conditioning, and communication applications.
URI: http://hdl.handle.net/123456789/13255
ISSN: 978-160086742-2
Appears in Collections:College of Engineering

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