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

@inproceedings{Lecompte:2019:10.1016/j.egypro.2019.01.477,
author = {Lecompte, S and Chatzopoulou, MA and Markides, C and De, Paepe M},
doi = {10.1016/j.egypro.2019.01.477},
pages = {2064--2069},
publisher = {Elsevier},
title = {Off-design comparison of subcritical and partial evaporating ORCs in quasi-steady state annual simulations},
url = {http://dx.doi.org/10.1016/j.egypro.2019.01.477},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - The subcritical ORC (SCORC) is  considered the industry standard due to its simple configuration, acceptable efficiency and lowcosts. However, it is known that alternative ORC configurations  have  the  potential  to  increase  efficiency.  A  cycle  modification  which  closely  resembles  the  SCORC is  the  partial  evaporating  ORC  (PEORC), where  a  two-phase  mixture  of  liquid-vapour enters the expander instead of superheated vapour. In theoretical studies at design conditions, higher power outputs are achieved for the PEORC compared to the SCORC. This  work aims  to  go  a  step  further by  investigating the  performance of  the  SCORC  and  PEORC  under time-dependent  operating  conditions.  A  direct  comparison  between  the  SCORC  and PEORC  is  made  for  identically sized systems using as input the waste heat stream of a waste incinerator plant and the changing ambient conditions. Performance maps of both cycle configurations are compiled and the benefit of an expander operating at variable speed is briefly discussed. The results indicate that for the specific case under investigation, the PEORC has an increased annually averaged net power output of 9.6% compared to the SCORC. Use of annually averaged input conditions results in an overestimation of the net power  output  for  both  the  SCORC  and  PEORC,  and  furthermore,  the  relative  improvement in  power  output  for  the  PEORC  is reduced to 6.8%. As such, the use of time-averaged conditions when comparing cycle architectures should preferably be avoided.
AU  - Lecompte,S
AU  - Chatzopoulou,MA
AU  - Markides,C
AU  - De,Paepe M
DO  - 10.1016/j.egypro.2019.01.477
EP  - 2069
PB  - Elsevier
PY  - 2019///
SN  - 1876-6102
SP  - 2064
TI  - Off-design comparison of subcritical and partial evaporating ORCs in quasi-steady state annual simulations
UR  - http://dx.doi.org/10.1016/j.egypro.2019.01.477
UR  - https://www.sciencedirect.com/science/article/pii/S1876610219305004?via%3Dihub
UR  - http://hdl.handle.net/10044/1/62113
ER  -
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