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Application of Exergy Analysis to Energy Systems

A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Thermodynamics".

Deadline for manuscript submissions: closed (30 November 2019) | Viewed by 6828

Special Issue Editor


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Guest Editor
Institute for Energy Engineering, Technische Universität Berlin, Marchstr. 18, 10587 Berlin, Germany
Interests: energy engineering and refrigeration; energy storage; applied thermodynamics; exergy-based methods; development of energy; energy costs; environmentally effective energy-conversion technologies
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Special Issue Information

Dear Colleagues,

The evaluation and improvement of energy-conversion and energy-intensive chemical systems from the perspectives of their sustainability (thermodynamics, economics, and environmental impacts) require a deep understanding of:

  • The real thermodynamic inefficiencies and the processes that cause them;
  • The costs and environmental impact associated with equipment and thermodynamic inefficiencies as well as the connection between those three important factors;
  • The interconnections among efficiency, investment cost, and component-related environmental impact associated with the selection of specific system components; and
  • Probable measures that would reduce the inefficiencies, the cost, and the environmental impact of the system being studied.

To reduce the thermodynamic inefficiencies, costs, and environmental impacts in a system, we must understand their process of formation. Exergy-based methods reveal the location, the magnitude, and the sources of inefficiencies, costs, and environmental impact and allow us to study the interconnections between them and the real potential for improvement. The input from these methods is useful in developing strategies for improvement and optimization of energy-conversion and energy-intensive chemical systems.

Research and review papers in the field of application of exergy-based methods are sought for this Special Issue.

Prof. Dr. Tatiana Morosuk

Guest Editor

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 submissions that pass pre-check are 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. Entropy is an international peer-reviewed open access monthly 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 2600 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.

Keywords

  • exergy analysis
  • exergy destruction
  • exergy efficiency
  • exergoeconomics
  • exergoenvironmental analysis
  • exergy-based methods
  • energy-conversion systems
  • energy-intensive chemical systems

 

Published Papers (2 papers)

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Research

20 pages, 1200 KiB  
Article
Exergy-Based Analysis and Optimization of an Integrated Solar Combined-Cycle Power Plant
by Louay Elmorsy, Tatiana Morosuk and George Tsatsaronis
Entropy 2020, 22(6), 655; https://doi.org/10.3390/e22060655 - 13 Jun 2020
Cited by 8 | Viewed by 2974
Abstract
The transition towards higher shares of electricity generation from renewable energy sources is shown to be significantly slower in developing countries with low-cost fossil fuel resources. Integrating conventional power plants with concentrated solar power may facilitate the transition towards a more sustainable power [...] Read more.
The transition towards higher shares of electricity generation from renewable energy sources is shown to be significantly slower in developing countries with low-cost fossil fuel resources. Integrating conventional power plants with concentrated solar power may facilitate the transition towards a more sustainable power production. In this paper, a novel natural gas-fired integrated solar combined-cycle power plant was proposed, evaluated, and optimized with exergy-based methods. The proposed system utilizes the advantages of combined-cycle power plants, direct steam generation, and linear Fresnel collectors to provide 475 MW baseload power in Aswan, Egypt. The proposed system is found to reach exergetic efficiencies of 50.7% and 58.1% for day and night operations, respectively. In economic analysis, a weighted average levelized cost of electricity of 40.0 $/MWh based on the number of day and night operation hours is identified. In exergoeconomic analysis, the costs of thermodynamic inefficiencies were identified and compared to the component cost rates. Different measures for component cost reduction and performance enhancement were identified and applied. Using iterative exergoeconomic optimization, the levelized cost of electricity is reduced to a weighted average of 39.2 $/MWh and a specific investment cost of 1088 $/kW. Finally, the proposed system is found to be competitive with existing integrated solar combined-cycle plants, while allowing a significantly higher solar share of 17% of the installed capacity. Full article
(This article belongs to the Special Issue Application of Exergy Analysis to Energy Systems)
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23 pages, 4601 KiB  
Article
Advanced Exergy Analysis in the Dynamic Framework for Assessing Building Thermal Systems
by Ana Picallo-Perez, José M Sala, George Tsatsaronis and Saeed Sayadi
Entropy 2020, 22(1), 32; https://doi.org/10.3390/e22010032 - 25 Dec 2019
Cited by 5 | Viewed by 3063
Abstract
This work applies the Dynamic Advanced Exergy Analysis (DAEA) to a heating and domestic hot water (DHW) facility supplied by a Stirling engine and a condensing boiler. For the first time, an advanced exergy analysis using dynamic conditions is applied to a building [...] Read more.
This work applies the Dynamic Advanced Exergy Analysis (DAEA) to a heating and domestic hot water (DHW) facility supplied by a Stirling engine and a condensing boiler. For the first time, an advanced exergy analysis using dynamic conditions is applied to a building energy system. DAEA provides insights on the components’ exergy destruction (ED) by distinguishing the inefficiencies that can be prevented by improving the quality (avoidable ED) and the ones constrained because of technical limitations (unavoidable ED). ED is related to the inherent inefficiencies of the considered element (endogenous ED) and those coming from the interconnections (exogenous ED). That information cannot be obtained by any other approach. A dynamic calculation within the experimental facility has been performed after a component characterization driven by a new grey-box modelling technique, through TRNSYS and MATLAB. Novel solutions and terms of ED are assessed for the rational implementation of the DAEA in building energy installations. The influence of each component and their interconnections are valuated in terms of exergy destruction for further diagnosis and optimization purposes. Full article
(This article belongs to the Special Issue Application of Exergy Analysis to Energy Systems)
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