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Session: Session 8: Scroll expanders
Session starts: Tuesday 13 October, 08:40
Presentation starts: 09:40
Room: 1A Europe

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Alessio Suman (University of Ferrara)
Carlo Buratto (University of Ferrara, Fluid-A s.r.l.)
Nicola Aldi (University of Ferrara)
Michele Pinelli (University of Ferrara)
Pier Ruggero Spina (University of Ferrara)
Mirko Morini (University of Parma)

Abstract:
In this paper, CFD analyses of real scroll compressor are developed for a two-dimensional real geometry of a scroll compressor obtained by means of a Reverse Engineering (RE) of a commercial scroll compressor to be used as an expander in a microORC system. The analyses are carried out by means of CFD numerical simulations involving two type of approaches: (i) Dynamic Mesh (DM) and (ii) Chimera Strategy (CS). The particularity of these types of transient analyses consists in being able to reproduce the real operation of the machine through a sequence of relative positions between fixed and moving spirals. The results discuss the difference between the two numerical approaches in terms of ability to represent the actual flow features in a positive displacement machine. Analysis of the performance in terms of pressure and mass flow rate profiles, volumetric efficiency and shaft torque are reported.