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Dynamic Response of a 50 kW Organic Rankine Cycle System in Association with Evaporators

Author

Listed:
  • Yuh-Ren Lee

    (Green Energy Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan)

  • Chi-Ron Kuo

    (Green Energy Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan)

  • Chih-Hsi Liu

    (Green Energy Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan)

  • Ben-Ran Fu

    (Green Energy Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan)

  • Jui-Ching Hsieh

    (Green Energy Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan)

  • Chi-Chuan Wang

    (Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan)

Abstract

The influences of various evaporators on the system responses of a 50 kW ORC system using R-245fa are investigated in this study. First the effect of the supplied hot water flowrate into the evaporator is examined and the exit superheat on the system performance between plate and shell-and-tube evaporator is also reported. Test results show that the effect of hot water flowrate on the evaporator imposes a negligible effect on the transient response of the ORC system. These results prevail even for a 3.5-fold increase of the hot water flowrate and the system shows barely any change subject to this drastic hot water flowrate change. The effect of exit superheat on the ORC system depends on the type of the evaporator. For the plate evaporator, an exit superheat less than 10 °C may cause ORC system instability due to considerable liquid entrainment. To maintain a stable operation, the corresponding Jakob number of the plate heat evaporator must be above 0.07. On the other hand, by employing a shell and tube heat evaporator connected to the ORC system, no unstable oscillation of the ORC system is observed for exit superheats ranging from 0 to 17 °C.

Suggested Citation

  • Yuh-Ren Lee & Chi-Ron Kuo & Chih-Hsi Liu & Ben-Ran Fu & Jui-Ching Hsieh & Chi-Chuan Wang, 2014. "Dynamic Response of a 50 kW Organic Rankine Cycle System in Association with Evaporators," Energies, MDPI, vol. 7(4), pages 1-13, April.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:4:p:2436-2448:d:35200
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    References listed on IDEAS

    as
    1. Lee, Yuh-Ren & Kuo, Chi-Ron & Wang, Chi-Chuan, 2012. "Transient response of a 50 kW organic Rankine cycle system," Energy, Elsevier, vol. 48(1), pages 532-538.
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    Cited by:

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    7. Luo, Junwei & Lu, Pei & Chen, Kaihuang & Luo, Xianglong & Chen, Jianyong & Liang, Yingzong & Yang, Zhi & Chen, Ying, 2023. "Experimental and simulation investigation on the heat exchangers in an ORC under various heat source/sink conditions," Energy, Elsevier, vol. 264(C).
    8. Ni, Jiaxin & Zhao, Li & Zhang, Zhengtao & Zhang, Ying & Zhang, Jianyuan & Deng, Shuai & Ma, Minglu, 2018. "Dynamic performance investigation of organic Rankine cycle driven by solar energy under cloudy condition," Energy, Elsevier, vol. 147(C), pages 122-141.
    9. Fu, Ben-Ran & Hsu, Sung-Wei & Liu, Chih-Hsi & Liu, Yu-Ching, 2014. "Statistical analysis of patent data relating to the organic Rankine cycle," Renewable and Sustainable Energy Reviews, Elsevier, vol. 39(C), pages 986-994.
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