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Numerical simulation of a twin screw expander for performance prediction

Iva Papeš, Joris Degroote UGent and Jan Vierendeels UGent (2015) IOP Conference Series-Materials Science and Engineering. 90.
abstract
With the increasing use of twin screw expanders in waste heat recovery applications, the performance prediction of these machines plays an important role. This paper presents a mathematical model for calculating the performance of a twin screw expander. From the mass and energy conservation laws, differential equations are derived which are then solved together with the appropriate Equation of State in the instantaneous control volumes. Different flow processes that occur inside the screw expander such as filling (accompanied by a substantial pressure loss) and leakage flows through the clearances are accounted for in the model. The mathematical model employs all geometrical parameters such as chamber volume, suction and leakage areas. With R245fa as working fluid, the Aungier Redlich-Kwong Equation of State has been used in order to include real gas effects. To calculate the mass flow rates through the leakage paths formed inside the screw expander, flow coefficients are considered as constant and they are derived from 3D Computational Fluid Dynamic calculations at given working conditions and applied to all other working conditions. The outcome of the mathematical model is the P-V indicator diagram which is compared to CFD results of the same twin screw expander. Since CFD calculations require significant computational time, developed mathematical model can be used for the faster performance prediction
Please use this url to cite or link to this publication:
author
organization
year
type
conference (proceedingsPaper)
publication status
published
subject
keyword
Redlich-Kwong Aungier EoS, low-order model, Expander
in
IOP Conference Series-Materials Science and Engineering
volume
90
issue title
9TH INTERNATIONAL CONFERENCE ON COMPRESSORS AND THEIR SYSTEMS
pages
9 pages
publisher
IOP Conference Series: Materials Science and Engineering
conference name
9th International Conference on Compressors and their Systems
conference location
London, UK
conference start
2015-09-05
conference end
2015-09-09
Web of Science type
Proceedings Paper
Web of Science id
000362287100058
ISSN
1757-8981
DOI
10.1088/1757-899X/90/1/012059
language
English
UGent publication?
yes
classification
P1
copyright statement
I have transferred the copyright for this publication to the publisher
id
6971511
handle
http://hdl.handle.net/1854/LU-6971511
date created
2015-10-30 14:51:54
date last changed
2016-12-19 15:37:27
@inproceedings{6971511,
  abstract     = {With the increasing use of twin screw expanders in waste heat recovery applications, the performance prediction of these machines plays an important role. This paper presents a mathematical model for calculating the performance of a twin screw expander. From the mass and energy conservation laws, differential equations are derived which are then solved together with the appropriate Equation of State in the instantaneous control volumes. Different flow processes that occur inside the screw expander such as filling (accompanied by a substantial pressure loss) and leakage flows through the clearances are accounted for in the model. The mathematical model employs all geometrical parameters such as chamber volume, suction and leakage areas. With R245fa as working fluid, the Aungier Redlich-Kwong Equation of State has been used in order to include real gas effects. To calculate the mass flow rates through the leakage paths formed inside the screw expander, flow coefficients are considered as constant and they are derived from 3D Computational Fluid Dynamic calculations at given working conditions and applied to all other working conditions. The outcome of the mathematical model is the P-V indicator diagram which is compared to CFD results of the same twin screw expander. Since CFD calculations require significant computational time, developed mathematical model can be used for the faster performance prediction},
  author       = {Pape\v{s}, Iva and Degroote, Joris and Vierendeels, Jan},
  booktitle    = {IOP Conference Series-Materials Science and Engineering},
  issn         = {1757-8981},
  keyword      = {Redlich-Kwong Aungier EoS,low-order model,Expander},
  language     = {eng},
  location     = {London, UK},
  pages        = {9},
  publisher    = {IOP Conference Series: Materials Science and Engineering},
  title        = {Numerical simulation of a twin screw expander for performance prediction},
  url          = {http://dx.doi.org/10.1088/1757-899X/90/1/012059},
  volume       = {90},
  year         = {2015},
}

Chicago
Papeš, Iva, Joris Degroote, and Jan Vierendeels. 2015. “Numerical Simulation of a Twin Screw Expander for Performance Prediction.” In IOP Conference Series-Materials Science and Engineering. Vol. 90. IOP Conference Series: Materials Science and Engineering.
APA
Papeš, I., Degroote, J., & Vierendeels, J. (2015). Numerical simulation of a twin screw expander for performance prediction. IOP Conference Series-Materials Science and Engineering (Vol. 90). Presented at the 9th International Conference on Compressors and their Systems, IOP Conference Series: Materials Science and Engineering.
Vancouver
1.
Papeš I, Degroote J, Vierendeels J. Numerical simulation of a twin screw expander for performance prediction. IOP Conference Series-Materials Science and Engineering. IOP Conference Series: Materials Science and Engineering; 2015.
MLA
Papeš, Iva, Joris Degroote, and Jan Vierendeels. “Numerical Simulation of a Twin Screw Expander for Performance Prediction.” IOP Conference Series-Materials Science and Engineering. Vol. 90. IOP Conference Series: Materials Science and Engineering, 2015. Print.