Special Issue "Exergy Analysis and Optimization of Energy Systems and Processes"
Deadline for manuscript submissions: 1 July 2019
This Special Issue is concerned with exergy concept and uses. Exergy (availability) is an old concept that was proposed a long time ago by Gouy in 1889, and was developed after by Stodola, Rant, and more recently, by Szargut. Actually, this scientific field is mature from an engineering point of view, and we note every year that between 1000 and 1500 publications are relevant to the subject. Some scientific journals are particularly involved in exergy analysis (energies too).
The objective of this Special Issue is to reinforce the uses of the concept in new domains (life sciences, societal aspects, nano and mini scales, and megascale systems). Progresses in chemical and mechanical engineering remain of interest, but with a focus on integration and hybridization. The combination of exergy analysis and optimization with environmental or economic objectives (or constraints) are important too, particularly exergo–economic consideration.
From a fundamental point of view, the relation of exergy analysis to efficiency, environmental impact, and renewability remains to be developed. Emergy compared to exergy is also of interest. Lastly, the exergy of the systems far from equilibrium, and with non stationary references, constitute a coming field of research improving the exergy method.
You are welcomed to contribute to the fundamental and applied aspects of the exergy concept, which is now mature, and to migrate in various new scientific specialities.
Prof. Dr. Michel Feidt
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- exergy, energy conversion, and emergy
- exergy costing
- waste heat
- living systems
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Exergy analysis and process optimization with variable environment temperature
Author: Michel Pons *
Affiliation: LIMSI, CNRS, Université Paris-Saclay, Rue du Belvédère, bât 507, 91405 Orsay Cedex, France
Correspondence: [email protected]; Tel.: +33-1691-58144
Abstract: Exergy is usually defined with respect to the environment temperature, which is used as a fixed reference. However, the environment temperature is essentially variable. The question then is: must exergy be defined with respect to a variable, or to a steady temperature? Thermodynamic consequences of either position are derived, leading to the concept of reversible processes in variable environment, forcedly equipped with an ideal heat storage. The exergy losses due to imperfect heat storage (finite size and finite heat exchange area) can then be identified and evaluated, including for the worst heat storage, the nonexistent one. The concepts are exemplified with the cases of air-conditioning in summertime, and of heat-pumping in winter. The analysis also demonstrates the existence of a minimum for the heat storage size, and shows how these exergy losses depend on the heat storage characteristics. The formal method for including these exergy losses into the optimization process is also described.
Title: Hybrid optimization methodology (Exergy/ Pinch) and application on a simple process
Author: Christelle Bou Malham, Assaad Zoughaib and Rodrigo Rivera Tinoco
Affiliation: Mines ParisTech, PSL Research University, France
Abstract: In the light of the alarming impending energy scene, energy efficiency is unmistakably gathering momentum. Among energy efficient process design methodologies, literature suggests pinch analysis and exergy analysis as two powerful thermodynamic methods, each showing certain drawbacks, however. In this perspective, this article puts forward a methodology that couples pinch and exergy analysis in a way to surpass their individual limitations in the aim of generating optimal operating conditions and topology for industrial processes. Using new optimizing exergy‐based criteria, exergy analysis is used not only to assess the exergy losses but also to guide the potential improvements in industrial processes structure and operating conditions. And while pinch analysis considers only heat integration to satisfy existent needs, the proposed methodology allows including other forms of recoverable exergy and explores new synergy pathways through conversion systems. A simple case study is proposed to demonstrate the applicability and efficiency of the proposed method.
Keywords: Pinch Analysis, Exergy Analysis, Operating Conditions Optimization, Structural Optimization, Heuristics, Industrial Processes