Entropy 2003, 5(5), 444-451; doi:10.3390/e5050444
Article

Optimization of a Thermoacoustic Engine with a Complex Heat Transfer Exponent

1, 2,* email, 3, 4 and 5
Received: 28 November 2002; Accepted: 9 September 2003 / Published: 31 December 2003
(This article belongs to the Special Issue Entropy Generation in Thermal Systems and Processes)
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Abstract: Heat transfer between a thermoacoustic engine and its surrounding heat reservoirs can be out of phase with oscillating working gas temperature. The paper presents a generalized heat transfer model using a complex heat transfer exponent. Both the real part and the imaginary part of the heat transfer exponent change the power versus efficiency relationship quantitatively. When the real part of the heat transfer exponent is fixed, the power output P decreases and the efficiency η increases along with increasing of the imaginary part. The Optimization zone on the performance of the thermoacoustic heat engine is obtained. The results obtained will be helpful for the further understanding and the selection of the optimal operating mode of the thermoacoustic heat engine.
Keywords: thermoacoustic engine; complex heat transfer exponent; optimization zone
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Wu, F.; Wu, C.; Guo, F.; Li, Q.; Chen, L. Optimization of a Thermoacoustic Engine with a Complex Heat Transfer Exponent. Entropy 2003, 5, 444-451.

AMA Style

Wu F, Wu C, Guo F, Li Q, Chen L. Optimization of a Thermoacoustic Engine with a Complex Heat Transfer Exponent. Entropy. 2003; 5(5):444-451.

Chicago/Turabian Style

Wu, Feng; Wu, Chih; Guo, Fangzhong; Li, Qing; Chen, Lingen. 2003. "Optimization of a Thermoacoustic Engine with a Complex Heat Transfer Exponent." Entropy 5, no. 5: 444-451.


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