A comparison of exergy efficiency definitions with focus on low temperature processes

Danahe Marmolejo-Correa and Truls Gundersen

Energy, 2012, vol. 44, issue 1, 477-489

Abstract: This work compares two classes of exergy efficiency definitions and applies them on a simple process (i.e. PRICO) for the liquefaction of natural gas. This comparison demonstrates the possible inconsistency and uncertainty of several exergy efficiency definitions already proposed in the literature. In addition, the paper highlights the importance of decomposing the total exergy into its relevant components, and to analyze the behavior of these exergy components individually. The exergy of heat as well as the exergy of a material stream exhibit a special and different behavior below ambient temperature compared to above ambient conditions. This is illustrated by calculating exergy efficiencies for the PRICO process for liquefaction of natural gas, and the results also show different figures for the various exergy efficiencies proposed in the literature.

Keywords: Exergy components; Efficiency; Natural gas liquefaction; PRICO; LNG (search for similar items in EconPapers)
Date: 2012
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (21)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544212004513
Full text for ScienceDirect subscribers only

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:eee:energy:v:44:y:2012:i:1:p:477-489

DOI: 10.1016/j.energy.2012.06.001

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().