Modelling and optimisation on scroll expander for waste heat recovery organic Rankine cycle

Liu, Z., Tian, G., Wei, M., Song, P., Lu, Y. , Ashby, G. and Roskilly, A. P. (2015) Modelling and optimisation on scroll expander for waste heat recovery organic Rankine cycle. Energy Procedia, 75, pp. 1603-1608. (doi: 10.1016/j.egypro.2015.07.379)

Abstract

Scroll expander has demonstrated high efficiency at low power range. In this paper, a generic model of a scroll expander has been developed. It can calculate the ideal expander parameters to give the optimal efficiency and prevent under- or over-expansion at any given operating conditions or fluids. The dynamic model was validated by predicting the ideal volumetric expansion ratio with ideal expansion ratio of 4.03 at 0.7 MPa pressure, and showed agreement with experimental data. The results suggested that the rate of scroll increase K in the geometric model has little effect on volumetric expansion ratio or ideal scroll length of the expander, but when expansion ratio is kept constant, lower K value results in lower leakage losses.

• Item Type: Articles
• Additional Information: Conference paper presented at The 7th International Conference on Applied Energy – ICAE2015, Abu Dhabi, United Arab Emirates, 28-31 Mar 2015.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lu, Dr Yiji
• Authors: Liu, Z., Tian, G., Wei, M., Song, P., Lu, Y., Ashby, G., and Roskilly, A. P.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Energy Procedia
• Publisher: Elsevier
• ISSN: 1876-6102
• ISSN (Online): 1876-6102
• Published Online: 28 August 2015
• Copyright Holders: Copyright © 2015 Crown Copyright
• First Published: First published in Energy Procedia 75: 1603-1608
• Publisher Policy: Reproduced under a Creative Commons License