Energy Harvesting - An Introduction

What is energy harvesting?
What are some of its applications?
Can we make that at home?

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Energy Harvesting
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If this is energy ...

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And, this is harvesting ...

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Then, this must be
energy harvesting!

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Get serious!

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What is Energy Harvesting?
●According to the institute of physics:
Energy harvesting, or energy scavenging, is a
process that captures small amounts of
energy that would otherwise be lost as heat,
light, sound, vibration or movement

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Huge amounts of energy come to us
from the Sun

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Some get stored in the wind!

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Some get stored in the water!

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Some get stored in ...
●Chemical energy – Petrolium, Coal, Gas, Plants
●Heat energy – Hot Earth!
●Potential Energy - Clouds

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Another source is Nuclear Energy!

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Plants have learned harvesting
long time ago!

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We also learned ...

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Getting some of the
potential energy ...

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Some of the wind energy

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Some of the heat energy

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Some of the sea currents energy

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And so much of the Chemical
Energy

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Yet, so much of
the energy
around us is not
easily
accessible!

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Let's just look at ourselves!

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Have you ever walked?!

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Ran?

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Climbed stairs?

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Or carried a
backpack?

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As you do all this, a lot of energy is used!

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Some can be reused!

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And Piezoelectric materials may help with
that!

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What is a Piezoelectric Material?

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Piezoelectric Material
•Electric Field  Mechanical Strain : Actuator
•Mechanical Stresses  Electrical Potential
Field : Sensor

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It exists in nature!

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Basic Properties

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Piezo-Fiber Composites

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It can be manufactured in different
forms

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You may buy it from electronics
shops too!

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Back to Harvesting!

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We may install Piezo in a backpack!

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Backpack Power Generator

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Or, install it in the ground!

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With cars too!

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Or install it in the shoes!

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How about harvesting your
breathing energy?!!!

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MEMS Power Generation

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Energy Harvesters

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Have you also noticed
how much heat do
YOU produce?

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Can we make some use of that too?

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Or heat from your car!

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Other sources to harvest from!
●Vibration from trains
●Noise Energy
●RF Energy
●Tidal Energy

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Think farther!

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References
●Alireza Khaligh and Omer G. Onar, Energy Harvesting, CRC Press,
2010
●Faruk Yildiz, Potential Ambient Energy-Harvesting Sources and
Techniques, The Journal of Technology Studies,
●Paul Ahern, Piezoelectric Energy Harvesting Review, slideshare.net
●J. Paulo and P.D. Gaspar, Review and Future Trend of Energy
Harvesting Methods for Portable Medical Devices, Proceedings of the
World Congress on Engineering 2010
●Loreto Mateu and Francesc Moll, Review of Energy Harvesting
Techniques and Applications for Microelectronics, Proceedings of the
SPIE Microtechnologies for the New Millenium, 2005
●Gyuhae Park, Overview of Energy Harvesting Systems, The First
Engineering Institute Workshop, slideshare.net