Article (Scientific journals)
Technical and economic optimization of subcritical, wet expansion and transcritical Organic Rankine Cycle (ORC) systems coupled with a biogas power plant
Dumont, Olivier; Dickes, Rémi; De Rosa, M. et al.
2018In Energy Conversion and Management, 157, p. 294-306
Peer Reviewed verified by ORBi
 

Files


Full Text
kcorc.pdf
Publisher postprint (1.48 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Biogas power plant; Organic Rankine cycle; Subcritical; Thermo-economic optimization; Trans-critical; Waste heat recovery; Wet expansion; Biogas; Commerce; Earnings; Energy conservation; Exhaust gases; Gases; Genetic algorithms; Heat pump systems; Ignition; Plant expansion; Starting; Waste heat; Waste heat utilization; Organic Rankine cycles; Thermoeconomic optimization; Rankine cycle
Abstract :
[en] Generally, >40% of the useful energy (cooling engine and exhaust gases) are wasted by a biogas power plant through the cooling radiator and the exhaust gases. An efficient way to convert this waste heat into work and eventually electricity is the use of an organic Rankine cycle (ORC) power system. Over the last few years, different architectures have been widely investigated (subcritical, wet expansion and trans-critical). Despite the promising performances, realistic economic and technical constraints, also related to the application, are required for a meaningful comparison between ORC technologies and architectures. Starting from the limited literature available, the aim of the present paper is to provide a methodology to compare sub-critical, trans-critical and wet expansion cycles and different types of expanders (both volumetric and turbomachinery) from both technical and economic point of view, which represent one of the main novel aspects of the present work. In particular, the paper focuses on the thermo-economic optimization of an ORC waste heat recovery unit for a 500 kWe biogas power plant located in a detailed regional market, which was not investigated yet. By means of a genetic algorithm, the adopted methodology optimizes a given economic criteria (Pay-Back Period, Net Present Value, Profitability Index and Internal Rate of Return) while respecting technical constraints (expander limitations) and thermodynamic constraints (positive pinch points in heat exchangers, etc.). The results show that optimal ORC solutions with a potential of energy savings up to 600 MWh a year and with a pay-back period lower than 3 years are achievable in the regional market analysed. © 2017 Elsevier Ltd
Disciplines :
Energy
Author, co-author :
Dumont, Olivier ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques
Dickes, Rémi ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques
De Rosa, M.;  School of Mechanical & Materials Engineering, University College Dublin, Belfield, Dublin, Ireland
Douglas, R.;  School of Mechanical & Aerospace Engineering, Queen's University Belfast, Ashby Building, Stranmillis Road, Belfast, United Kingdom
Lemort, Vincent  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques
Language :
English
Title :
Technical and economic optimization of subcritical, wet expansion and transcritical Organic Rankine Cycle (ORC) systems coupled with a biogas power plant
Publication date :
2018
Journal title :
Energy Conversion and Management
ISSN :
0196-8904
eISSN :
1879-2227
Publisher :
Elsevier Ltd
Volume :
157
Pages :
294-306
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 February 2018

Statistics


Number of views
134 (15 by ULiège)
Number of downloads
585 (17 by ULiège)

Scopus citations®
 
69
Scopus citations®
without self-citations
64
OpenCitations
 
53

Bibliography


Similar publications



Contact ORBi