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Dimensionless correlations and performance maps of scroll expanders for micro-scale Organic Rankine Cycles

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  • Olmedo, Luis Eric
  • Mounier, Violette
  • Mendoza, Luis Carlos
  • Schiffmann, Jürg

Abstract

In the endeavor towards distributed power systems, not seasonal-dependent micro-power generation technologies are expected to integrate the energy scenario in the years to come. In this context, the Organic Rankine Cycle (ORC) in the (1–10) KWe scale has chronically lacked a suitable expansion device, hindering its market attractiveness. As scroll expanders have been pointed out as strong potential candidates, performance correlations and pre-design maps based on a review and analysis of published experimental data are presented. A dimensionless approach based on the traditional Ns, Ds dimensionless numbers stemming from turbomachinery has been chosen for greater generality. In addition, the lubricating oil mass fraction effect on the scroll expander performance has been included. The generated maps contribute to accelerating the pre-design phases at the system and component level with beneficial effects for the overall development process. Basic geometry and size characteristics are considered as well, acknowledging their importance in micro-power embedded applications; these considerations are illustrated in a passenger car waste-heat recovery case study. Findings suggest that optimized scroll expanders may potentially reach very interesting nominal electric isentropic efficiencies (up to 80% for an oil lubricated scroll expander).

Suggested Citation

  • Olmedo, Luis Eric & Mounier, Violette & Mendoza, Luis Carlos & Schiffmann, Jürg, 2018. "Dimensionless correlations and performance maps of scroll expanders for micro-scale Organic Rankine Cycles," Energy, Elsevier, vol. 156(C), pages 520-533.
    • Handle: RePEc:eee:energy:v:156:y:2018:i:c:p:520-533
    DOI: 10.1016/j.energy.2018.05.001
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    Cited by:

    1. Fatigati, Fabio & Di Bartolomeo, Marco & Cipollone, Roberto, 2020. "On the effects of leakages in Sliding Rotary Vane Expanders," Energy, Elsevier, vol. 192(C).
    2. Rak, Józef & Pietrowicz, Sławomir, 2020. "Internal flow field and heat transfer investigation inside the working chamber of a scroll compressor," Energy, Elsevier, vol. 202(C).
    3. Liu, Chao & Wang, Shukun & Zhang, Cheng & Li, Qibin & Xu, Xiaoxiao & Huo, Erguang, 2019. "Experimental study of micro-scale organic Rankine cycle system based on scroll expander," Energy, Elsevier, vol. 188(C).
    4. Rosset, Kévin & Mounier, Violette & Guenat, Eliott & Schiffmann, Jürg, 2018. "Multi-objective optimization of turbo-ORC systems for waste heat recovery on passenger car engines," Energy, Elsevier, vol. 159(C), pages 751-765.
    5. 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).
    6. 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).
    7. Fanti, Gabriel Rossi & Romão, Douglas Araújo & de Almeida, Ricardo Barbosa & de Mello, Paulo Eduardo Batista, 2020. "Influence of flank clearance on the performance of a scroll expander prototype," Energy, Elsevier, vol. 193(C).
    8. Campana, Claudio & Cioccolanti, Luca & Renzi, Massimiliano & Caresana, Flavio, 2019. "Experimental analysis of a small-scale scroll expander for low-temperature waste heat recovery in Organic Rankine Cycle," Energy, Elsevier, vol. 187(C).

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