CFD Simulation and Experiment of Scroll Expander for Organic Rankine Systems

Chao Wei Chang; Jen Chieh Chang; Tzu Chen Hung; Yung Shin Tseng

doi:10.4028/www.scientific.net/AMR.614-615.515

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 614-615CFD Simulation and Experiment of Scroll Expander...

CFD Simulation and Experiment of Scroll Expander for Organic Rankine Systems

Abstract:

Organic Rankine cycles (ORCs) could recover low-grade heat to useful energy. The expander is a key element in ORC systems. The expander efficiency is about 35% to 40% in the experiment. This research investigates the transient thermal-hydraulic behavior of 2-D scroll expander using computational fluid dynamics (CFD) approach. The working fluid was assumed to behave like ideal gas. The verification has been compared by mass flow rate between experiment data and CFD simulation. Finally, pitch of the scroll geometry has been selected as the parameter for sensitivity study based on the condition of no change in overall volume. The pressure-volume (P-V) behavior and volumetric efficiency with rotating speed diagram have been discussed on various scroll geometry.

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Periodical:

Advanced Materials Research (Volumes 614-615)

Pages:

515-519

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.614-615.515

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Online since:

December 2012

Authors:

Chao Wei Chang, Jen Chieh Chang, Tzu Chen Hung, Yung Shin Tseng

Keywords:

Built-In Volume Ratio, Computational Fluid Dynamics (CFD), Dynamic Mesh, ORC, Scroll Expander

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