Imperial College London
Alternate

ProfessorChristosMarkides

Faculty of Engineering, Department of Chemical Engineering

Professor of Clean Energy Technologies
 
 
 
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Contact

 

+44 (0)20 7594 1601c.markides Website

 
 
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Location

 

404ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Li:2021:10.1016/j.enconman.2021.113894,
author = {Li, X and Lecompte, S and Van, Nieuwenhuyse J and Couvreur, K and Tian, H and Shu, G and De, Paepe M and Markides, CN},
doi = {10.1016/j.enconman.2021.113894},
journal = {Energy Conversion and Management},
pages = {1--20},
title = {Experimental investigation of an organic Rankine cycle with liquid-flooded expansion and R1233zd(E) as working fluid},
url = {http://dx.doi.org/10.1016/j.enconman.2021.113894},
volume = {234},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A new concept of liquid-flooded expansion has been proposed as a performance increasing modification of the basic ORC targeted at low-temperature heat sources. However, little research demonstrates the potential of this technology especially experimentally. In this paper, an experimental test facility based on a conventional recuperative ORC system was constructed with an independent liquid flooding loop that enables testing the influence of liquid flooding on a modified single-screw expander as well as on the cycle itself. Experiments were performed at various pressure ratios (3.3–4.1) over the expander and flooding ratios (0–0.3) with R1233zd(E) as the working fluid and a standard lubricant oil as the flooding medium. The data reduction and uncertainty analysis were also discussed in depth. In total, 142 steady-state points were obtained. Compared with the baseline organic Rankine cycle, the maximum improvement of the liquid-flooded expansion on the expander power output can be 9.1%, although at slightly worse expander inlet conditions. The maximum enhancement of the isothermal efficiency of the expander was 9.5%. Results also showed that the expander power output, the net power output and the thermal efficiency were enhanced with the increase of the flooding liquid amount. The potential of an organic Rankine cycle system with liquid-flooded expansion can be further examined if over-expansion losses can be reduced and larger amount of oil can be injected, i.e., with higher pressure ratios and higher flooding ratios. Overall, this study provides insights into performance improvement by means of modifying the cycle thermodynamics itself.
AU  - Li,X
AU  - Lecompte,S
AU  - Van,Nieuwenhuyse J
AU  - Couvreur,K
AU  - Tian,H
AU  - Shu,G
AU  - De,Paepe M
AU  - Markides,CN
DO  - 10.1016/j.enconman.2021.113894
EP  - 20
PY  - 2021///
SN  - 0196-8904
SP  - 1
TI  - Experimental investigation of an organic Rankine cycle with liquid-flooded expansion and R1233zd(E) as working fluid
T2  - Energy Conversion and Management
UR  - http://dx.doi.org/10.1016/j.enconman.2021.113894
UR  - https://www.sciencedirect.com/science/article/pii/S0196890421000716?via%3Dihub
UR  - http://hdl.handle.net/10044/1/87430
VL  - 234
ER  -
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