Exergy Assessment of Recovery Solutions from Dry and Moist Gas Available at Medium Temperature

Fadhel Ayachi, Elias Boulawz Ksayer and Pierre Neveu
Additional contact information
Fadhel Ayachi: PROMES (PROcédés, Matériaux et Energie Solaire)—CNRS (Centre National de la Recherche Scientifique), Tecnosud Rambla de la thermodynamique, Perpignan 66100, France
Elias Boulawz Ksayer: CEP MINES Paris-Tech (Centre Energétique et Procédés), 5 rue Léon Blum, Palaiseau 91120, France
Pierre Neveu: PROMES (PROcédés, Matériaux et Energie Solaire)—CNRS (Centre National de la Recherche Scientifique), Tecnosud Rambla de la thermodynamique, Perpignan 66100, France

Energies, 2012, vol. 5, issue 3, 1-13

Abstract: The Agence Nationale de la Recherche (ANR-EESI) ENERGY ReCOvery from Low Temperature heat sources (ENERCO_LT) project is a waste heat recovery project that aims to reduce energy consumption in industrial gas production sites, by producing electrical power from exothermic processes discharges at low and medium temperature. Two promising thermal sources, consisting of: (i) almost dry gas flow at 165 °C and (ii) moist gas flow at 150 °C with a dew point at 60 °C, were then investigated. In this paper, the challenge was to discern suitable recovery solutions facing resource specificities and their thermodynamic constraints, in order to minimize the overall exergy destruction, i.e. , to move up the exergy efficiency of the entire system. In this spirit, different designs, including Organic Rankine Cycles (ORCs) and CO 2 transcritical cycles, operating as simple and cascade cycles, were investigated. Combined exergy analysis and pinch optimization was performed to identify the potential of various working fluids, by their properties, to overcome the global irreversibility according to the studied resource. Supercritical parameters of various working fluids are investigated too, and seem to bring promising results regarding system performances.

Keywords: thermodynamic optimization; exergy; pinch; ORC; subcritical cycles; transcritical cycles; cascade (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2012
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://www.mdpi.com/1996-1073/5/3/718/pdf (application/pdf)
https://www.mdpi.com/1996-1073/5/3/718/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:5:y:2012:i:3:p:718-730:d:16611

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().