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RISS 인기검색어
- 검색키워드
- 저자 : Ezhilarasi Deenadayalan (검색결과 2 건)
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A Review of Acoustic Energy Harvesting
Minu A Pillai,Ezhilarasi Deenadayalan 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
Acoustic energy is an important form of energy which is generated and unused all around us. Despite the prevalence of acousticenergy a major challenge of energy harvesting is the low power density in typical acoustic noise fields. With a larger focus on greenenergy, acoustic energy is one of the vastly available energy sources and so harvesting this energy plays an important role in research. Unconventionally a thermoacoustic engine converts thermal energy to acoustic energy via its core, comprising a porous material thatis sandwiched between two heat exchangers. The induced acoustic wave can be converted into electricity by introducing novelenvironment friendly energy converters. Integration of the thermoacoustic technology with piezoelectricity tends to be promising, sincethe piezoelectric ceramics are sensitive and operating efficiently at high frequencies. Thermoacoustic technology is receiving growinginterest in research for its many advantages, such as having no moving parts, being environment friendly and the possibility of usingother renewable energy for its operation. This paper aims at providing a review on various acoustic and thermoacoustic energyharvesting techniques and the maximum power generated from each of these techniques.
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Cantilever Beam with Trapezoidal Cavity for Improved Energy Harvesting
Annapureddy Rami Reddy,Mangalanathan Umapathy,Deenadayalan Ezhilarasi,Gandhi Uma 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
This paper presents a cantilever structure as energy harvester by introducing a trapezoidal cavity to increase the amplitude of the generated voltage and the overall mechanical to electrical energy conversion efficiency. An analytical model of the proposed structure is developed using Euler-Bernoulli beam theory. The effect of taper angle of the trapezoidal cavity and the neutral axis shift on the generated voltage is analyzed using analytical model and through experimentation. The generated output voltage from the energy harvester with trapezoidal cavity is compared with the beam having rectangular cavity and the beam without cavity. The generated voltage for the beam with trapezoidal cavity is 97.5% and 108% higher as compared with the beam having rectangular cavity and the beam without cavity. The characteristics of the energy harvester are evaluated through analytical model and experimentation and the results are in close agreement.
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