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Thermoacoustic model of a modified free piston Stirling engine with a thermal buffer tube

Author

Listed:
  • Yang, Qin
  • Luo, Ercang
  • Dai, Wei
  • Yu, Guoyao

Abstract

This article presents a modified free-piston Stirling heat engine configuration in which a thermal buffer tube is added to sandwich between the hot and cold heat exchangers. Such a modified configuration may lead to an easier fabrication and lighter weight of a free piston. To analyze the thermodynamic performance of the modified free piston Stirling heat engine, thermoacoustic theory is used. In the thermoacoustic modelling, the regenerator, the free piston, and the thermal buffer tube are given at first. Then, based on linear thermoacoustic network theory, the thermal and thermodynamic networks are presented to characterize acoustic pressure and volume flow rate distributions at different interfaces, and the global performance such as the power output, the heat input and the thermal efficiency. A free piston Stirling heat engine with several hundreds of watts mechanical power output is selected as an example. The typical operating and structure parameters are as follows: frequency around 50Hz, mean pressure around 3.0MPa, and a diameter of free piston around 50mm. From the analysis, it was found that the modified free-piston Stirling heat engine has almost the same thermodynamic performance as the original design, which indicates that the modified configuration is worthy to develop in future because of its mechanical simplicity and reliability.

Suggested Citation

  • Yang, Qin & Luo, Ercang & Dai, Wei & Yu, Guoyao, 2012. "Thermoacoustic model of a modified free piston Stirling engine with a thermal buffer tube," Applied Energy, Elsevier, vol. 90(1), pages 266-270.
    • Handle: RePEc:eee:appene:v:90:y:2012:i:1:p:266-270
    DOI: 10.1016/j.apenergy.2011.03.028
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    Citations

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    Cited by:

    1. Yang, Rui & Wang, Junxiang & Luo, Ercang, 2023. "Revisiting the evaporative Stirling engine: The mechanism and a case study via thermoacoustic theory," Energy, Elsevier, vol. 273(C).
    2. Hu, J.Y. & Luo, E.C. & Dai, W. & Zhang, L.M., 2017. "Parameter sensitivity analysis of duplex Stirling coolers," Applied Energy, Elsevier, vol. 190(C), pages 1039-1046.
    3. Ayodeji Sowale & Athanasios J. Kolios, 2018. "Thermodynamic Performance of Heat Exchangers in a Free Piston Stirling Engine," Energies, MDPI, vol. 11(3), pages 1-20, February.
    4. Jia, Boru & Smallbone, Andrew & Feng, Huihua & Tian, Guohong & Zuo, Zhengxing & Roskilly, A.P., 2016. "A fast response free-piston engine generator numerical model for control applications," Applied Energy, Elsevier, vol. 162(C), pages 321-329.
    5. Piccolo, A., 2013. "Optimization of thermoacoustic refrigerators using second law analysis," Applied Energy, Elsevier, vol. 103(C), pages 358-367.
    6. Ayodeji Sowale & Edward J. Anthony & Athanasios John Kolios, 2018. "Optimisation of a Quasi-Steady Model of a Free-Piston Stirling Engine," Energies, MDPI, vol. 12(1), pages 1-17, December.
    7. Zhu, Shunmin & Yu, Guoyao & O, Jongmin & Xu, Tao & Wu, Zhanghua & Dai, Wei & Luo, Ercang, 2018. "Modeling and experimental investigation of a free-piston Stirling engine-based micro-combined heat and power system," Applied Energy, Elsevier, vol. 226(C), pages 522-533.
    8. Steiner, Thomas W. & Archibald, Geoffrey D.S., 2014. "A high pressure and high frequency diaphragm engine: Comparison of measured results with thermoacoustic predictions," Applied Energy, Elsevier, vol. 114(C), pages 709-716.
    9. Zhu, Shunmin & Yu, Guoyao & Ma, Ying & Cheng, Yangbin & Wang, Yalei & Yu, Shaofei & Wu, Zhanghua & Dai, Wei & Luo, Ercang, 2019. "A free-piston Stirling generator integrated with a parabolic trough collector for thermal-to-electric conversion of solar energy," Applied Energy, Elsevier, vol. 242(C), pages 1248-1258.
    10. Jiang, Zhijie & Xu, Jingyuan & Yu, Guoyao & Yang, Rui & Wu, Zhanghua & Hu, Jianying & Zhang, Limin & Luo, Ercang, 2023. "A Stirling generator with multiple bypass expansion for variable-temperature waste heat recovery," Applied Energy, Elsevier, vol. 329(C).

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