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Thermal Brownian heat engine with external and internal irreversibilities

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  • Chen, Lingen
  • Qi, Congzheng
  • Ge, Yanlin
  • Feng, Huijun

Abstract

A finite time thermodynamic model of irreversible thermal Brownian heat engines with various irreversibilities is built. The analytical expressions of power and efficiency are derived. The working temperatures are solved by combining equations, the essential performance characteristics of heat engine are further analyzed. The relationships among optimal performance indicators and design parameters are also studied. The optimal performance characteristics are obtained by optimizing the internal parameters and thermal conductance ratio of heat exchangers. The optimal working regions and optimal working temperatures are also given. Finally, the new model performance is compared with that of the non-equilibrium thermodynamic one, and the significance of the new model is illustrated. The results show that the new model can be simplified to the existing models, and the optimal performances of those existing models with different irreversible factors can also be derived through the optimization relation in this paper. The power and efficiency have extreme values about barrier height, thermal conductance ratio and external load, respectively. When those parameters are optimized simultaneously, the corresponding values of the working temperature are optimal for the heat engine. The kinetic energy will reduce power and efficiency, which is different from the result of the non-equilibrium thermodynamic models.

Suggested Citation

  • Chen, Lingen & Qi, Congzheng & Ge, Yanlin & Feng, Huijun, 2022. "Thermal Brownian heat engine with external and internal irreversibilities," Energy, Elsevier, vol. 255(C).
    • Handle: RePEc:eee:energy:v:255:y:2022:i:c:s0360544222014852
    DOI: 10.1016/j.energy.2022.124582
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    References listed on IDEAS

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    1. Mesfin Asfaw, 2008. "Modeling an efficient Brownian heat engine," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 65(1), pages 109-116, September.
    2. Chen, Lingen & Xia, Shaojun, 2022. "Maximizing power output of endoreversible non-isothermal chemical engine via linear irreversible thermodynamics," Energy, Elsevier, vol. 255(C).
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    5. Y. Zhang & B. H. Lin & J. C. Chen, 2006. "Performance characteristics of an irreversible thermally driven Brownian microscopic heat engine," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 53(4), pages 481-485, October.
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    Citations

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    Cited by:

    1. Chen, Lingen & Shi, Shuangshuang & Ge, Yanlin & Feng, Huijun, 2023. "Performance optimization of diffusive mass transfer law irreversible isothermal chemical pump," Energy, Elsevier, vol. 263(PC).
    2. Yang, Wenhao & Feng, Huijun & Chen, Lingen & Ge, Yanlin, 2023. "Power and efficiency optimizations of a simple irreversible supercritical organic Rankine cycle," Energy, Elsevier, vol. 278(C).
    3. Chen, Lingen & Shi, Shuangshuang & Ge, Yanlin & Feng, Huijun, 2023. "Power density performances and multi-objective optimizations for an irreversible Otto cycle with five specific heat models of working fluid," Energy, Elsevier, vol. 282(C).
    4. Li, Zhaojin & Bi, Yuehong & Wang, Cun & Shi, Qi & Mou, Tianhong, 2023. "Finite time thermodynamic optimization for performance of absorption energy storage systems," Energy, Elsevier, vol. 282(C).
    5. Chen, Lingen & Shi, Shuangshuang & Ge, Yanlin & Feng, Huijun, 2023. "Ecological function performance analysis and multi-objective optimization for an endoreversible four-reservoir chemical pump," Energy, Elsevier, vol. 282(C).
    6. Jin, Qinglong & Xia, Shaojun & Chen, Lingen, 2023. "A modified recompression S–CO2 Brayton cycle and its thermodynamic optimization," Energy, Elsevier, vol. 263(PE).
    7. Ares de Parga-Regalado, A.M. & Valencia-Ortega, G. & Barranco-Jiménez, M.A., 2023. "Thermo-economic optimization of irreversible Novikov power plant models including a proposal of dissipation cost," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 613(C).
    8. Qi, Congzheng & Chen, Lingen & Ge, Yanlin & Feng, Huijun, 2023. "Three-heat-reservoir thermal Brownian heat transformer and its performance limits," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 622(C).
    9. Chen, Lingen & Lorenzini, Giulio, 2023. "Heating load, COP and exergetic efficiency optimizations for TEG-TEH combined thermoelectric device with Thomson effect and external heat transfer," Energy, Elsevier, vol. 270(C).
    10. Ge, Yanlin & Wu, Heng & Chen, Lingen & Feng, Huijun & Xie, Zhihui, 2023. "Finite time and finite speed thermodynamic optimization for an irreversible Atkinson cycle," Energy, Elsevier, vol. 270(C).

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