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Effects of suction port arrangements on a scroll expander for a small scale ORC system based on CFD approach

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  • Song, Panpan
  • Wei, Mingshan
  • Liu, Zhen
  • Zhao, Ben

Abstract

Blocking effect of the orbiting scroll tip on the suction flow of a scroll expander, closely associated with the location of the suction port, has a vital role on the transient performances of the expander. In this study, CFD based 3D numerical simulations were performed on scroll expanders with different suction port locations to estimate transient features of the aerodynamic parameters including pulsating mass flow rate through the suction port, asymmetric distributions of the internal flow, gas forces and moments exerted on the orbiting scroll. The results illustrate the pulsating features of the suction mass flow rate, in response to both variations of the suction flow area and the suction chamber volume, change obviously for expanders with different suction port locations. A special aerodynamic separation of the suction chamber induces a sudden drop of the suction mass flow rate before the top profile meshing. Apart from the mass flow rate, both the fluctuating intensities and the magnitudes of the gas forces and moments change with different suction port locations as well. A proposed local analysis approach on the driving moment indicates the fluctuations of the driving moment in different time periods are induced by different factors, and transient moment features of all scroll segments are closely associated with the asymmetric pressure distribution which is an integrated result of the suction/discharging flows and the eccentric rotation of the orbiting scroll.

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  • Song, Panpan & Wei, Mingshan & Liu, Zhen & Zhao, Ben, 2015. "Effects of suction port arrangements on a scroll expander for a small scale ORC system based on CFD approach," Applied Energy, Elsevier, vol. 150(C), pages 274-285.
    • Handle: RePEc:eee:appene:v:150:y:2015:i:c:p:274-285
    DOI: 10.1016/j.apenergy.2015.04.046
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    Cited by:

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    4. Giuffrida, Antonio, 2017. "Improving the semi-empirical modelling of a single-screw expander for small organic Rankine cycles," Applied Energy, Elsevier, vol. 193(C), pages 356-368.
    5. Gaosheng Li & Hongguang Zhang & Fubin Yang & Songsong Song & Ying Chang & Fei Yu & Jingfu Wang & Baofeng Yao, 2016. "Preliminary Development of a Free Piston Expander–Linear Generator for Small-Scale Organic Rankine Cycle (ORC) Waste Heat Recovery System," Energies, MDPI, vol. 9(4), pages 1-18, April.
    6. Songsong Song & Hongguang Zhang & Rui Zhao & Fanxiao Meng & Hongda Liu & Jingfu Wang & Baofeng Yao, 2017. "Simulation and Performance Analysis of Organic Rankine Systems for Stationary Compressed Natural Gas Engine," Energies, MDPI, vol. 10(4), pages 1-23, April.
    7. Oh, Jinwoo & Jeong, Hoyoung & Kim, Joonbyum & Lee, Hoseong, 2020. "Numerical and experimental investigation on thermal-hydraulic characteristics of a scroll expander for organic Rankine cycle," Applied Energy, Elsevier, vol. 278(C).
    8. Song, Panpan & Wei, Mingshan & Zhang, Yangjun & Sun, Liwei & Emhardt, Simon & Zhuge, Weilin, 2018. "The impact of a bilateral symmetric discharge structure on the performance of a scroll expander for ORC power generation system," Energy, Elsevier, vol. 158(C), pages 458-470.
    9. Piotr Kolasiński, 2020. "Domestic Organic Rankine Cycle-Based Cogeneration Systems as a Way to Reduce Dust Emissions in Municipal Heating," Energies, MDPI, vol. 13(15), pages 1-22, August.
    10. Zhang, Yi-Fan & Li, Ming-Jia & Ren, Xiao & Duan, Xin-Yue & Wu, Chia-Jung & Xi, Huan & Feng, Yong-Qiang & Gong, Liang & Hung, Tzu-Chen, 2022. "Effect of heat source supplies on system behaviors of ORCs with different capacities: An experimental comparison between the 3 kW and 10 kW unit," Energy, Elsevier, vol. 254(PB).
    11. Zhang, Hong-Hu & Zhang, Yi-Fan & Feng, Yong-Qiang & Chang, Jen-Chieh & Chang, Chao-Wei & Xi, Huan & Gong, Liang & Hung, Tzu-Chen & Li, Ming-Jia, 2023. "The parametric analysis on the system behaviors with scroll expanders employed in the ORC system: An experimental comparison," Energy, Elsevier, vol. 268(C).
    12. Mendoza, Luis Carlos & Lemofouet, Sylvain & Schiffmann, Jürg, 2017. "Testing and modelling of a novel oil-free co-rotating scroll machine with water injection," Applied Energy, Elsevier, vol. 185(P1), pages 201-213.
    13. Zhang, Xinjing & Xu, Yujie & Xu, Jian & Sheng, Yong & Zuo, Zhitao & Liu, Jimin & Chen, Haisheng & Wang, Yaodong & Huang, Ye, 2017. "Study on the performance and optimization of a scroll expander driven by compressed air," Applied Energy, Elsevier, vol. 186(P3), pages 347-358.
    14. Piotr Kolasiński, 2020. "The Method of the Working Fluid Selection for Organic Rankine Cycle (ORC) Systems Employing Volumetric Expanders," Energies, MDPI, vol. 13(3), pages 1-28, January.
    15. Emhardt, Simon & Tian, Guohong & Song, Panpan & Chew, John & Wei, Mingshan, 2020. "CFD modelling of small scale ORC scroll expanders using variable wall thicknesses," Energy, Elsevier, vol. 199(C).
    16. Emhardt, Simon & Tian, Guohong & Song, Panpan & Chew, John & Wei, Mingshan, 2022. "CFD analysis of the influence of variable wall thickness on the aerodynamic performance of small scale ORC scroll expanders," Energy, Elsevier, vol. 244(PA).
    17. Ziviani, Davide & James, Nelson A. & Accorsi, Felipe A. & Braun, James E. & Groll, Eckhard A., 2018. "Experimental and numerical analyses of a 5 kWe oil-free open-drive scroll expander for small-scale organic Rankine cycle (ORC) applications," Applied Energy, Elsevier, vol. 230(C), pages 1140-1156.
    18. Jiang, L. & Lu, H.T. & Wang, L.W. & Gao, P. & Zhu, F.Q. & Wang, R.Z. & Roskilly, A.P., 2017. "Investigation on a small-scale pumpless Organic Rankine Cycle (ORC) system driven by the low temperature heat source," Applied Energy, Elsevier, vol. 195(C), pages 478-486.
    19. Ma, Zhiwei & Bao, Huashan & Roskilly, Anthony Paul, 2017. "Dynamic modelling and experimental validation of scroll expander for small scale power generation system," Applied Energy, Elsevier, vol. 186(P3), pages 262-281.
    20. Casari, Nicola & Fadiga, Ettore & Pinelli, Michele & Randi, Saverio & Suman, Alessio & Ziviani, Davide, 2020. "Investigation of flow characteristics in a single screw expander: A numerical approach," Energy, Elsevier, vol. 213(C).

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