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Entropy
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Exergetic and Thermoeconomic Analysis of Thermal Systems
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Exergetic and Thermoeconomic Analysis of Thermal Systems

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

Deadline for manuscript submissions: closed (28 February 2020) | Viewed by 8944

Special Issue Editor

Prof. Dr. Ho-Young Kwak

E-Mail Website
Guest Editor
Mechanical Engineering Department, Chung-Ang University, Seoul 156-756, Republic of Korea
Interests: bubble nucleation; bubble dynamics; sonoluminescence phenomena; nucleate boiling heat transfer; cooling electronic equipment by phase change
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It has been confirmed by many researchers that exergy analysis accurately quantifies the entropy generation occurring at each component and therefore permits to calculate the lost work (exegy destruction) at the component of thermal systems by the Gouy–Stodola theorem. On the other hand, thermoeconomic analysis based on the exergy, which provides a rationale for assessing the cost of product and helps to optimize the thermal systems, requires further studies to clarify the disputed concepts among researchers. Furthermore, thermoeconomic diagnosis of the thermal systems, which is one of the important fields in the application of the thermoeconomic analysis, has yet to be developed.

This Special Issue aims to provide an open discussion on the research carried out in this field, and submissions related to the optimization of thermal systems based on entropy generation minimization and/or cost minimization, exergy costing, including the lost work, and various methods for the thermoeconomic diagnosis are welcome.

Prof. Dr. Ho-Young Kwak
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
  • Thermoeconomic analysis
  • Thermoexonomic diagnosis
  • Entropy generation
  • Exergy costing

Published Papers (3 papers)

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Research

41 pages, 817 KiB  
Article
An Irreversibility-Based Criterion to Determine the Cost Formation of Residues in a Three-Pressure-Level Combined Cycle
by Lugo-Méndez Helen Denise, Torres-González Edgar Vicente, Castro-Hernández Sergio, Salazar-Pereyra Martín, López-Arenas Teresa and Lugo-Leyte Raúl
Entropy 2020, 22(3), 299; https://doi.org/10.3390/e22030299 - 05 Mar 2020
Cited by 10 | Viewed by 2534
Abstract
In an energy system, it is important to identify the origin of residue formation in order to implement actions to reduce their formation or to eliminate them as well as to evaluate their impact on the production costs of the system. In the [...] Read more.
In an energy system, it is important to identify the origin of residue formation in order to implement actions to reduce their formation or to eliminate them as well as to evaluate their impact on the production costs of the system. In the exergetic cost theory, although there are several criteria to allocate the cost formation of residues to the productive components, no unique indication on the best choice has been defined yet. In this paper, the production exergy costs are determined by allocating the residue cost formation to the irreversibilities of the productive components from which they originate. This criterion, based on the Gouy–Stodola theorem, is an extension of the criterion of entropy changes, and unlike this, it avoids the existence of a negative production cost. This criterion is applied to a combined cycle of three pressure levels, and the production exergy costs are compared with the criteria of entropy changes, distributed exergy, and entropy. The results of the proposed criterion are in agreement with the compared criteria. Full article
(This article belongs to the Special Issue Exergetic and Thermoeconomic Analysis of Thermal Systems)
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11 pages, 1156 KiB  
Article
Role of Waste Cost in Thermoeconomic Analysis
by Cuneyt Uysal and Ho-Young Kwak
Entropy 2020, 22(3), 289; https://doi.org/10.3390/e22030289 - 02 Mar 2020
Cited by 7 | Viewed by 2213
Abstract
Power plants or thermal systems wherein products such as electricity and steam are generated affect the natural environment, as well as human society, through the discharging of wastes. The wastes from such plants may include ashes, flue gases, and hot water streams. The [...] Read more.
Power plants or thermal systems wherein products such as electricity and steam are generated affect the natural environment, as well as human society, through the discharging of wastes. The wastes from such plants may include ashes, flue gases, and hot water streams. The waste cost is of primary importance in plant operation and industrial ecology. Therefore, an appropriate approach for including waste cost in a thermoeconomic analysis is essential. In this study, a method to take waste cost into account in thermoeconomics to determine the production cost of products via thermoeconomic analysis is proposed. The calculation of the waste cost flow rates at the dissipative units and their allocation to system components are important to obtain the production cost of a plant. Full article
(This article belongs to the Special Issue Exergetic and Thermoeconomic Analysis of Thermal Systems)
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12 pages, 4237 KiB  
Article
Comparison of the Trilateral Flash Cycle and Rankine Cycle with Organic Fluid Using the Pinch Point Temperature
by Kai-Yuan Lai, Yu-Tang Lee, Miao-Ru Chen and Yao-Hsien Liu
Entropy 2019, 21(12), 1197; https://doi.org/10.3390/e21121197 - 05 Dec 2019
Cited by 10 | Viewed by 3737
Abstract
Low-temperature heat utilization can be applied to waste heat from industrial processes or renewable energy sources such as geothermal and ocean energy. The most common low-temperature waste-heat recovery technology is the organic Rankine cycle (ORC). However, the phase change of ORC working fluid [...] Read more.
Low-temperature heat utilization can be applied to waste heat from industrial processes or renewable energy sources such as geothermal and ocean energy. The most common low-temperature waste-heat recovery technology is the organic Rankine cycle (ORC). However, the phase change of ORC working fluid for the heat extraction process causes a pinch-point problem, and the heat recovery cannot be efficiently used. To improve heat extraction and power generation, this study explored the cycle characteristics of the trilateral flash cycle (TFC) in a low-temperature heat source. A pinch-point-based methodology was developed for studying the optimal design point and operating conditions and for optimizing working fluid evaporation temperature and mass flow rate. According to the simulation results, the TFC system can recover more waste heat than ORC under the same operating conditions. The net power output of the TFC was approximately 30% higher than ORC but at a cost of higher pump power consumption. Additionally, the TFC was superior to ORC with an extremely low-temperature heat source (<80 °C), and the ideal efficiency was approximately 3% at the highest work output condition. The TFC system is economically beneficial for waste-heat recovery for low-temperature heat sources. Full article
(This article belongs to the Special Issue Exergetic and Thermoeconomic Analysis of Thermal Systems)
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