In this section
@inproceedings{Zagorowska:2018:10.1115/GT2018-76399,
author = {Zagorowska, M and Thornhill, NF and Skourup, C},
doi = {10.1115/GT2018-76399},
title = {Dynamic modelling and control of a compressor using Chebyshev polynomial approximation},
url = {http://dx.doi.org/10.1115/GT2018-76399},
year = {2018}
}
TY - CPAPER
AB - © 2018 ASME. The aim of this study is to apply a Chebyshev polynomial approximation of the compressor map for dynamic modelling and control of centrifugal compressors. The results are compared to those from an approximation based on the third order polynomials and a compressor map derived from first principles. In the analysis of centrifugal compressors, a combination of dynamic conservation laws and static compressor map provides an insight into the surge phenomenon, whose avoidance remains one of the objectives of compressor control. The compressor maps based on the physical laws provide accurate results, but require a detailed knowledge about the properties of the system, such as the geometry of the compressor and gas quality. Third order polynomials are usually used as an approximation for the compressor map, providing simplified models at the expense of accuracy. Chebyshev polynomial approximation provides a trade-off between the accuracy of physical modelling with the ease of use provided by third order polynomial approximation.
AU - Zagorowska,M
AU - Thornhill,NF
AU - Skourup,C
DO - 10.1115/GT2018-76399
PY - 2018///
TI - Dynamic modelling and control of a compressor using Chebyshev polynomial approximation
UR - http://dx.doi.org/10.1115/GT2018-76399
ER -
Nina Thornhill, ABB/RAEng Professor of Process Automation
Centre for Process Systems Engineering
Department of Chemical Engineering
Imperial College London
South Kensington Campus, London SW7 2AZ
Tel: +44 (0)20 7594 6622
Email: n.thornhill@imperial.ac.uk