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Influence of flank clearance on the performance of a scroll expander prototype

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  • Fanti, Gabriel Rossi
  • Romão, Douglas Araújo
  • de Almeida, Ricardo Barbosa
  • de Mello, Paulo Eduardo Batista

Abstract

Scroll expanders are positive displacement machines with great potential for the implementation of organic Rankine cycle (ORC) and compressed air energy storage (CAES) systems, particularly for small scale plants or laboratory research. Despite the widespread use of scroll devices as compressors and vacuum pumps, its use as expanders is comparatively more recent. The current work presents experimental results obtained with an open-drive and oil-free scroll expander constructed for research purposes working with air. The influence of flank clearance over the expander performance is investigated with two configurations: 57 μm and 165 μm. The prototype geometry is described in detail: equations that define the scroll wraps, sealing implementation and inlet cross-section. Maximum isentropic efficiency of 50.5% was obtained with the smaller flank clearance of 57 μm. Friction losses were also measured experimentally. Appropriate correlations for mechanical power, isentropic efficiency and filling factor were obtained from experimental data as a function of pressure ratio.

Suggested Citation

  • 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).
    • Handle: RePEc:eee:energy:v:193:y:2020:i:c:s0360544219325186
    DOI: 10.1016/j.energy.2019.116823
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    References listed on IDEAS

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    1. Dumont, Olivier & Parthoens, Antoine & Dickes, Rémi & Lemort, Vincent, 2018. "Experimental investigation and optimal performance assessment of four volumetric expanders (scroll, screw, piston and roots) tested in a small-scale organic Rankine cycle system," Energy, Elsevier, vol. 165(PA), pages 1119-1127.
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    Cited by:

    1. Du, Yuheng & Pekris, Michael & Tian, Guohong, 2023. "Influence of sealing cavity geometries on flank clearance leakage and pressure imbalance of micro-scale transcritical CO2 scroll expander by CFD modelling," Energy, Elsevier, vol. 282(C).
    2. Feng, Yong-qiang & Xu, Jing-wei & He, Zhi-xia & Hung, Tzu-Chen & Shao, Meng & Zhang, Fei-yang, 2022. "Numerical simulation and optimal design of scroll expander applied in a small-scale organic rankine cycle," Energy, Elsevier, vol. 260(C).
    3. Murthy, Anarghya Ananda & Norris, Stuart & Subiantoro, Alison, 2022. "Experimental investigation of internal leakages and effects of lubricating oil on the performance of a four-intersecting-vane rotary expander," Energy, Elsevier, vol. 238(PB).

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