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Pr. Ana Maria Blanco-Marigorta

Department of Chemical Engineering, Universidad de Las Palmas de Gran Canaria, Spain


Talk Title
The exergetic efficiency: an exergy based performance criteria under review

Talk Abstract

The exergetic efficiency is one of the main parameters introduced by an exergy analysis for the evaluation of the thermodynamic performance of an energy system. It can be applied at any level of the energy process, from a simple component to the entire plant. Different approaches for formulating the exergetic efficiency are suggested in the literature, but often without sufficient understanding and consistence. In this work, these formulations, applied to several components and processes, are compared and critically reviewed.

A classical definition considers the exergetic efficiency as the percentage of the exergy provided to a system that is found in the product. A key factor here is the adequate definition of the exergy value of the product and the exergy value of the fuel. The product and the fuel should be unambiguously identified. The product represents the amount of exergy produced by the system and the fuel consist of the exergy resources expended to generate the product: the fuel points out the expense and the product the profit, in terms of exergy. Other commonly used definition of exergetic efficiency just compares the exergy at the outlet to the exergy introduced to the system. Both approximations are widely accepted and adopted, but not the two of them can be used in every case. A literature review has shown that ambiguous exergetic efficiency definitions produce confusing and contradictory results. In this work, the descriptions used for several components are analyzed in detail.

It is attempted here to clarify the appropriate denotations of the product, the fuel, and, consequently, the exergetic efficiency, in order to be used without creating confusion, with an aim at the advancement of international standardization of these important concepts.

Short Biography

Ana M. Blanco-Marigorta is Full Professor of Chemical Engineering at Las Palmas de Gran Canaria University, Spain. She received her Doctorate (Ph.D.) with honors in Chemistry from the University of La Laguna, Spain. She obtained a degree in Chemistry at the University of Valladolid (Spain) and an Engineer degree in Energy Technologies at the Universidad Nacional de Educación a Distancia (UNED), Spain. During 2004-2006 she was on a Postdoctoral stay at the Energy Engineering Institute of the Technische Universität Berlin, Germany. Since then, she has participated in several research projects dealing with Exergy Analysis in energy conversion processes. Her research interest focuses on thermodynamic optimization of energy systems through exergy methods, (exergoeconomic, exergoenvironmental,…). She is co-author of a number of papers indexed in the JCR (h-index =13), 8 book chapters and two books. She has also co-directed 28 M.Sc. and two Ph.D. Theses. She has participated in several projects obtained through agreements with private companies and she is co-author of one patent. She has also participated in several training innovation projects. Prof. Blanco-Marigorta has been Visiting Professor at the Technische Universität Berlin (Berlin, Germany), the Universitá degli Studi di Firenze (Firenze, Italy), the Escuela Superior Politécnica del Litoral, (Guayaquil, Ecuador) San Diego State University (San Diego, California, USA) and Marquette University (Milwaukee, Wisconsin, USA). She has participated in numerous international conferences and has been Member of the organizing and/or scientific committees of national and international conferences. She is reviewer of international journals, (e.g. Desalination, Energy, Energy Conversion and Management, International Journal of Hydrogen Energy, Applied Energy,…) and she is a member of the Editorial Board of the International Environmental Energy and Economics International Research Journal.

Talk Keywords
Exergy analysis, exergetic efficiency, fuel exergy, product exergy.
Target Audience
Students, Post doctoral, Industry, Doctors and professors
Speaker-intro video

The International Conference on Innovative Applied Energy (IAPE’18)