Travelling :ave 7hermoacoustic (lectricity *enerator for 5ural $reas 8sing a 6ide-branch Alternator Arrangement

This paper illustrates the design, construction and testing of a looped-tube travelling wave thermoacoustic electricity generator that provides low-cost electrical power for remote and rural areas of developing countries. The system is designed numerically by using a specialized design tool DeltaEC, based on the linear thermoacoustic theory. A commercially available loudspeaker is connected via a 920 mm long side-branch tube to the 5.0 m long one wavelength looped-tube thermoacoustic engine. It is used to convert the acoustic power produced by the engine to useful electrical output. Air at atmospheric pressure is used as working gas to minimize the cost of the construction. The thermal power that drives the engine is supplied by a propane gas burner. It is shown that at an operating frequency of 64.5 Hz, the thermoacoustic generator can produce up to 13 W of electrical power. Results obtained from numerical analysis and experiments are presented and discussed in detail.

[1]  Qing Li,et al.  Heat driven thermoacoustic cooler based on traveling–standing wave , 2010 .

[2]  Nikolaus Rott,et al.  Thermally driven acoustic oscillations, part III: Second-order heat flux , 1975 .

[3]  G. Swift,et al.  A thermoacoustic Stirling heat engine , 1999, Nature.

[4]  Peter H. Ceperley,et al.  Gain and efficiency of a short traveling wave heat engine , 1984 .

[5]  Gregory W. Swift,et al.  Analysis and performance of a large thermoacoustic engine , 1992 .

[6]  Nikolaus Rott,et al.  Damped and thermally driven acoustic oscillations in wide and narrow tubes , 1969 .

[7]  Artur J. Jaworski,et al.  Impact of acoustic impedance and flow resistance on the power output capacity of the regenerators in travelling-wave thermoacoustic engines , 2010 .

[8]  Scott Backhaus,et al.  A low-cost electricity generator for rural areas using a travelling-wave looped-tube thermoacoustic engine , 2010 .

[9]  Yoshiaki Watanabe,et al.  Basic study for practical use of thermoacoustic electric generation system , 2010 .

[10]  Huifang Kang,et al.  Optimizing hydraulic radius and acoustic field of the thermoacoustic engine , 2009 .

[11]  G. Swift,et al.  A thermoacoustic-Stirling heat engine: detailed study , 2000, The Journal of the Acoustical Society of America.

[12]  K. T. Feldman,et al.  Review of the literature on Rijke thermoacoustic phenomena , 1968 .

[13]  Gregory W. Swift,et al.  DESIGN ENVIRONMENT FOR LOW-AMPLITUDE THERMOACOUSTIC ENGINES , 1994 .

[14]  Peter H. Ceperley,et al.  A pistonless Stirling engine—The traveling wave heat engine , 1979 .

[15]  Yong Wang,et al.  NUMERICAL SIMULATION AND PARAMETER OPTIMIZATION OF THERMO-ACOUSTIC REFRIGERATOR DRIVEN AT LARGE AMPLITUDE , 2010 .

[16]  Anthony A. Atchley.  Standing wave analysis of a thermoacoustic prime mover below onset of self‐oscillation , 1992 .

[17]  Scott Backhaus,et al.  Travelling-wave thermoacoustic electricity generator using an ultra-compliant alternator for utilization of low-grade thermal energy , 2012 .

[18]  Artur J. Jaworski,et al.  A method of characterising performance of audio loudspeakers for linear alternator applications in low-cost thermoacoustic electricity generators , 2011 .

[19]  G. Swift.  Thermoacoustics: A Unifying Perspective for Some Engines and Refrigerators , 2017 .

[20]  John William Strutt,et al.  Scientific Papers: The Explanation of certain Acoustical Phenomena , 2009 .

[21]  Rayleigh.  The Explanation of Certain Acoustical Phenomena , 1878, Nature.

[22]  T. Yazaki,et al.  TRAVELING WAVE THERMOACOUSTIC ENGINE IN A LOOPED TUBE , 1998 .