A COMPARISON BETWEEN TWO DIFFERENT CFD APPROACHES OF A REAL SCROLL EXPANDER FOR MICRO-ORC APPLICATIONS asme-orc2015 Tracking Number 130Presentation: Session: Session 8: Scroll expanders Room: 1A Europe Session start: 08:40 Tue 13 Oct 2015 Alessio Suman smnlss@unife.it Affifliation: University of Ferrara Carlo Buratto carlo.buratto@unife.it Affifliation: University of Ferrara, Fluid-A s.r.l. Nicola Aldi nicola.aldi@unife.it Affifliation: University of Ferrara Michele Pinelli michele.pinelli@unife.it Affifliation: University of Ferrara Pier Ruggero Spina spnprg@unife.it Affifliation: University of Ferrara Mirko Morini mirko.morini@unipr.it Affifliation: University of Parma Topics: - Volumetric Expanders (Topics), - Simulation and Design Tools (Topics), - I prefer Oral Presentation (Presentation Preference) 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. |