Abstract
Electrical and mechanical power, together with other forms of useful work, are generated worldwide at a rate of about 1012 watts, mostly using heat engines. The efficiency of such engines is limited by the laws of thermodynamics and by practical considerations such as the cost of building and operating them. Engines with high efficiency help to conserve fossil fuels and other natural resources, reducing global-warming emissions and pollutants. In practice, the highest efficiencies are obtained only in the most expensive, sophisticated engines, such as the turbines in central utility electrical plants. Here we demonstrate an inexpensive thermoacoustic engine that employs the inherently efficient Stirling cycle1. The design is based on a simple acoustic apparatus with no moving parts. Our first small laboratory prototype, constructed using inexpensive hardware (steel pipes), achieves an efficiency of 0.30, which exceeds the values of 0.10–0.25 attained in other heat engines5,6 with no moving parts. Moreover, the efficiency of our prototype is comparable to that of the common internal combustion engine2 (0.25–0.40) and piston-driven Stirling engines3,4 (0.20–0.38).
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References
Walker, G. Stirling Engines (Clarendon, Oxford, (1960).
Bejan, A. Advanced Engineering Thermodynamics 2nd edn (Wiley, New York, ( 1997).
Mechanical Technology Inc., Latha, NY Automative Stirling Engine-Mod II Design Report (Tech. Rep. CR-175106, NASA Lewis Research Cente, Cleveland, Ohi, (1986).
Slaby, J. G. in 21st Intersociety Energy Conversion Engineering Conf. Vol. 1 420–429 (Am. Chem. Soc., Washington DC, ( 1996).
Proc. 29th Intersociety Energy Conversion Engineering Conf. (Am. Inst. of Aeronautics and Astronautics, Washington DC, (1994).
Godshalk, K. M.et al . Characterization of 350?Hz thermoacoustic driven orifice pulse tube refrigerator with measurements of the phase of the mass flow and pressure. Adv. Cryogen. Eng. 41, 1411–1418 (1996).
Radebaugh, R. Areview of pulse tube refrigeration, Adv. Cryogen. Eng. 35, 1191–1205 (1990).
Swift, G. W. in Proc. DOE Natural Gas Conf.Paper 7.1 (Federal Energy Technology Center, Morgantown, West Virginia, (1997).
Ceperley, P. H. Apistonless Stirling engine—the traveling wave heat engine. J. Acoust. Soc. Am. 66, 1508–1513 (1979).
Yazaki, T., Iwata, A., Maekawa, T. & Tominaga, A. Traveling wave thermoacoustic engine in a looped tube. Phys. Rev. Lett. 81, 3128–3131 (1998).
Swift, GW. Thermoacoustic engines. J. Acoust. Soc. Am. 84, 1145–1180 (1988).
Ceperley, P. H. Gain and efficiency of a short traveling wave heat engine. J. Acoust. Soc. Am. 77, 1239–1244 ( 1985).
Kinsler, L. E., Frey, A. R., Coppens, A. & Sanders, J. V. Fundamentals of Acoustics (Wiley & Sons, New York, (1982).
Ward, W. C. & Swift, G. W. Design environment for low amplitude thermoacoustic engines (DeltaE). J. Acoust. Soc. Am. 95, 3671–3672 (1994).
Gedeon, D. in Cryocoolers 9 (ed. Ross, R. G.) 385–392 (Plenum, New York, (1997).
Olson, J. R. & Swift, G. W. Acoustic streaming in pulse tube refrigerators: tapered pulse tubes. Cryogenics 37, 769–776 (1997).
Streeter, V. L. Handbook of Fluid Dynamics (McGraw-Hill, New York, ( 1961).
Idelchik, I. E. Handbook of Hydraulic Resistance 3rd edn (CRC Press, Boca Raton, FL, (1994).
Swift, G. W., Gardner, D. L. & Backhaus, S. Acoustic recovery of lost power in pulse tube refrigerators. J. Acoust. Soc. Am. 105, 711– 724 (1999).
Fusco, A. M., Ward, W. C. & Swift, G. W. Two-sensor power measurements in lossy ducts. J. Acoust. Soc. Am. 91, 2229–2235 (1992).
Acknowledgements
We thank D. L. Gardner, C. Espinoza and R. Rockage for their assistance in constructing the engine. This work was supported by the Office of Basic Energy Sciences in the US DOE.
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Backhaus, S., Swift, G. A thermoacoustic Stirling heat engine. Nature 399, 335–338 (1999). https://doi.org/10.1038/20624
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DOI: https://doi.org/10.1038/20624
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