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Modelling and Optimisation on scroll expander for Waste Heat Recovery Organic Rankine Cycle

Lookup NU author(s): Zhen Liu, Dr Guohong Tian, Dr Yiji Lu, Professor Tony Roskilly

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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. Crown Copyright (C) 2015 Published by Elsevier Ltd.


Publication metadata

Author(s): Liu Z, Tian GH, Wei MS, Song PP, Lu YJ, Ashby G, Roskilly AP

Publication type: Article

Publication status: Published

Journal: Energy Procedia

Year: 2015

Volume: 75

Pages: 1603-1608

Online publication date: 28/08/2015

Acceptance date: 01/01/1900

ISSN (print): 1876-6102

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.egypro.2015.07.379

DOI: 10.1016/j.egypro.2015.07.379


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