The Score-Stove™ generates electricity from a wood-burning cooking stove using a thermo-acoustic engine (TAE) that converts heat to sound through a linear alternator (LA). This paper introduces a prototype hemitoroidal suspension that was refined into a segmented trapezoidal shape that gave a higher cyclic life for the LA and includes a critical evaluation that compares a theoretical analysis with experimental results. The results show an improvement from the 40% efficiency of a standard loudspeaker used in reverse as an LA to 70–80% efficiency with the new suspension and a double Halbach array magnetic topology.
Issue Section:
Research Papers
References
1.
The University of Nottingham, 2017, “
The Score Project
,” The University of Nottingham, Nottingham, UK, accessed Oct. 31, 2017, www.score.uk.com2.
Liu
, J.
, and Garrett
, S.
, 2005
, “Characterization of a Small Moving-Magnet Electrodynamic Linear Motor
,” J. Acoust. Soc. Am.
, 118
(4
), pp. 2289–2295.3.
Riley
, P.
, 2014
, “Designing a Low-Cost Electricity-Generating Cooking Stove for High-Volume Im
plementation,” Ph.D. thesis
, The University of Nottingham, Nottingham, UK.http://eprints.nottingham.ac.uk/13961/4.
Boldea
, I.
, and Nasar
, S. A.
, 1987
, “Permanent-Magnet Linear Alternators—Part II: Design Guidelines
,” IEEE Trans. Aerosp. Electron. Syst.
, 23
(1
), pp. 79
–82
.5.
Wang
, J.
, West
, M.
, Howe
, D.
, La Parra
, H. Z.-D.
, and Arshad
, W. M.
, 2007
, “Design and Experimental Verification of a Linear Permanent Magnet Generator for a Free-Piston Energy Converter
,” IEEE Trans. Energy Convers.
, 22
(2
), pp. 299
–305
.6.
Faiz
, J.
, Rezaeealam
, B.
, and Yamada
, S.
, 2006
, “Reciprocating Flux-Concentrated Induction Generator for Free-Piston Generator
,” IEEE Trans. Magn.
, 42
(9
), pp. 2172
–2178
.7.
Riley
, P.
, and Johnson
, M.
, 2008
, “Generating Electricity in Developing Countries Using Thermo-Acoustics Powered by Burning Wood
,” J. Acoust. Soc. Am.
, 123
(5
), p. 3542
.8.
Yu
, Z.
, Saechan
, P.
, and Jaworski
, A.
, 2011
, “A Method of Characterising Performance of Audio Loudspeakers for Linear Alternator Applications in Low-Cost Thermo-Acoustic Electricity Generators
,” Appl. Acoust.
, 72
(5
), pp. 260
–267
.9.
Borwick
, J.
, 1994
, Loudspeaker and Headphone Handbook
, 2nd ed., Focal Press, Waltham, MA
.10.
Saha
, C.
, Riley
, P.
, Yu
, Z.
, Jaworski
, A.
, and Johnson
, C. M.
, 2012
, “Halbach Array Linear Alternator for Thermo-Acoustic Engine
,” Sens. Actuators A
, 178
, pp. 179
–187
.11.
Yu
, Z.
, Backhaus
, S.
, and Jaworski
, A.
, 2009
, “Design and Testing of a Travelling-Wave Looped-Tube Engine for Low-Cost Electricity Generators in Remote and Rural Areas
,” AIAA
Paper No. 2009-4540.12.
Callister
, W. D.
, Jr., 2011
, Fundamentals of Materials Science and Engineering
, 4th ed., The University of Utah
, Salt Lake City, UT.13.
Lee
, T.
, and Lakes
, R. S.
, 2001
, “Damping Properties of Lead Metaniobate
,” IEEE Trans. Ultrason. Ferroelectr. Freq. Control
, 48
(1), pp. 48
–52
.14.
Andrew
, D. D.
, and Haddad
, S. D.
, 1992
, Vibration for Engineers
, Prentice Hall, Upper Saddle River, NJ
, p. 605
.15.
Warren
, C. Y.
, 1989
, Roark's Formulas for Stress and Strain
, 6th ed., McGraw-Hill, New York
.Copyright © 2018 by ASME
You do not currently have access to this content.
