Update on single-screw expander geometry model integrated into an open-source simulation tool

In this paper, a mechanistic steady-state model of a single-screw expander is described with emphasis on the geometric description. Insights into the calculation of the main parameters and the definition of the groove profile are provided. Additionally, the adopted chamber model is discussed. The mo...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2015-08, Vol.90 (1), p.12064
Main Authors: Ziviani, D, Bell, I H, De Paepe, M, van den Broek, M
Format: Article
Language:English
Subjects:
Algorithms
Chambers
Computer programs
Computer simulation
Freeware
Grooves
Mathematical models
Open source software
Programming languages
Rankine cycle
Software
Source code
Steady state models
Working fluids
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Summary:In this paper, a mechanistic steady-state model of a single-screw expander is described with emphasis on the geometric description. Insights into the calculation of the main parameters and the definition of the groove profile are provided. Additionally, the adopted chamber model is discussed. The model has been implemented by means of the open-source software PDSim (Positive Displacement SIMulation), written in the Python language, and the solution algorithm is described. The single-screw expander model is validated with a set of steady-state measurement points collected from a 11 kWe organic Rankine cycle test-rig with SES36 and R245fa as working fluid. The overall performance and behavior of the expander are also further analyzed.
ISSN:1757-8981
1757-899X
1757-899X
DOI:10.1088/1757-899X/90/1/012064