NDLI: A Portable Power Source Based on MEMS and Carbon Nanotubes

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Frances, A. Hill Timothy, F. Havel Livermore, Carol
Copyright Year	2007
Abstract	The conceptual design for a portable power source that stores energy in the elastic deformation of carbon nanotubes is presented. The architecture of such a device is comprised of three main system-level components: a CNT-based spring, a generator, and a coupling mechanism between the spring and the generator. A simple model of one possible energy storage device is formulated as a tool to study the feasibility of such a system, the effect of scaling on power output, and the overall efficiency of the system. Energy is stored in a CNT bundle that is stretched in pure axial tension, and an escapement mechanism is used to control the rate of energy release from the system. The stored mechanical energy is converted to electrical energy with a piezoelectric generator. Simulations are run for systems of different size scales, which yield power outputs from 0.4 μW to 4 mW. The efficiency of converting the energy stored in the CNT-based spring to electrical energy approaches 15%. Results of the study show that operating frequency, efficiency, discharge time and power can be acceptable over a range of size scales, leaving some flexibility in the choice of overall size scale, but the high load resistances required to reach high output power favor larger scale systems.
Starting Page	21
Ending Page	30
Page Count	10
File Format	PDF
ISBN	079184305X
DOI	10.1115/IMECE2007-42196
e-ISBN	0791838129
Volume Number	Volume 11: Micro and Nano Systems, Parts A and B
Conference Proceedings	ASME 2007 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2007-11-11
Publisher Place	Seattle, Washington, USA
Access Restriction	Subscribed
Subject Keyword	Microelectromechanical systems Deformation Simulation Carbon nanotubes Generators Tension Engineering simulation Conceptual design Springs Stress Energy storage
Content Type	Text
Resource Type	Article

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