Energy Center

Seminar: Kenninger Renewable Energy and Power Systems

April 14 @ 3:30 PM - 5:00 PM - ME 2054

 

Abstract
 
Novel material properties open the possibility of developing new components and systems. These new
components and systems require sustainable power to operate. This synergy between the materials –
energy – smart systems has provided the new paradigm for innovation driving the emergence of efficient
and high performance architectures. Over the years, my research has been driven by this paradigm
making contributions in visualization and creation of integrated architectures that lead towards energy
efficient platforms. Some examples illustrating these platforms will be provided in this presentation.
One such platform being the self-powered structural health monitoring and control nodes. The vast
reduction in the size and power consumption of sensors and CMOS circuitry has opened the opportunity
to develop on-board power sources that can replace or extend the life of the batteries. In some
applications such as sensors for structural health monitoring in remote locations, geographically
inaccessible temperature or humidity sensors, the battery charging or replacement operations can be
tedious and expensive. Logically, the emphasis in such cases has been on developing the on-site
generators that can transform any available form of energy at the location into electrical energy.
Piezoelectric energy harvesting has emerged as one of the prime methods for transforming mechanical
energy into electric energy. Various forms of piezoelectric transducer structures have been fabricated to
capture the mechanical energy with high efficiency. At micro-to-nanoscale, the design of transducer
becomes challenging as the size reduction is accompanied by enhancement in the resonance frequency.
We will review the solution to the problem of low frequency resonant transducer structures. Next, we
will utilize these novel transducers to develop dual phase harvesters, one that can capture mechanical
energy and magnetic energy at the same time. The dual-phase harvester consisting of a magnetostrictive/
piezoelectric/ magnetostrictive (M/P/M) laminate structure utilizing two mechanisms simultaneously: 1.
magnetoelectric (ME) effect, where external magnetic field H can excite longitudinal strain through
magnetostricitve phase and transfer to piezoelectric phase; 2. Piezoelectric effect, where induced
mechanical vibration can create strain and generate charge. The first step towards achieving the desired
objective was to design and fabricate high ME coefficient self-biased structures. Ferromagnetic –
ferroelectric composite resonant transducers with giant magnetoelectric coefficient at ZERO bias were
fabricated and utilized for the low frequency energy harvesting system. A fundamental understanding of
elastic coupling in the thick film laminate structures was developed to identify the mechanisms
controlling the self-biased magnetoelectric response. Transition of these structures on the micro/nano
scale will be discussed and experimental results in this direction will be provided. Implementation of
these structures on the practical platforms will be demonstrated.
 
Biography
 
Dr. Shashank Priya is currently Professor in department of mechanical engineering. His research is
focused in the areas related to multifunctional materials, energy and bio-inspired systems. He has
published over 250 peer-reviewed journal papers and more than 50 conference proceedings covering
these topics. Additionally, he has published more than four book chapters, five US patents, and five
edited books. He is the founder and chair of the Annual Energy Harvesting Workshop series and Energy
Summit. He is currently serving as the chief editor of journal “Energy Harvesting and Systems”,
editorial board member of journal integrated ferroelectrics and advisory board member of journal of
dielectrics. He is also serving as the member of the Honorary Chair Committee for the International
Workshop on Piezoelectric Materials and Applications (IWPMA). Shashank has received several awards
including: Alumni award for excellence in Research 2014, Fellow American Ceramic Society 2013,
Turner Fellowship 2012, Dean’s Research Excellence Award 2011, and AFOSR Young Investigator
Award.

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