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Energies
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Waste Heat Recovery Optimization in Gas Turbines
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Waste Heat Recovery Optimization in Gas Turbines

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "J: Thermal Management".

Deadline for manuscript submissions: 1 July 2024 | Viewed by 730

Special Issue Editors

Prof. Dr. Kwang Y. Lee

E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, Baylor University, Waco, TX 76798, USA
Interests: power systems control; power plant control; fuel cell power plants; renewable energy; intelligent control; modern heuristic optimization
Special Issues, Collections and Topics in MDPI journals
Dr. Xiao Wu

E-Mail Website
Guest Editor
National Engineering Research Center of Power Generation Control and Safety, School of Energy and Environment, Southeast University, Nanjing 210096, China
Interests: optimization and control of low-carbon energy system
Special Issues, Collections and Topics in MDPI journals
Dr. Fan Zhang

E-Mail Website
Guest Editor
College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Interests: energy system; dynamic simulation; model predictive control; disturbance rejection control
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Gas turbines are widely used technological solutions for power generation because of their high power density, compact structure, and operational flexibility. The exhaust gas temperature of these turbines is around 500℃. Discharging the exhaust gas into the environment would lead to unfavourable thermal efficiency. In this context, waste heat recovery (WHR) is an imperative technology to further utilize the energy contained in the exhaust gas for additional power or other purposes, improving the overall efficiency of the gas turbine system. In addition, advantages such as substantial cost savings and reductions in gas emissions can be achieved.

Some typical techniques for waste heat recovery in gas turbines include heat recovery steam generators (HRSGs), the organic Rankine cycle (ORC), and the supercritical carbon dioxide (s-CO2) power cycle. Optimization can consider various factors, such as the design of a heat exchanger, selection of working fluid, cycle configuration, and determination of operating parameters. Implementing advanced control strategies and conducting continuous monitoring and regular maintenance are also critical to the operation of WHR systems.

This Special Issue aims to present and disseminate the most recent advances related to the theory, design, modelling, application, control, and condition monitoring of waste heat recovery optimization in gas turbines.

Prof. Dr. Kwang Y. Lee
Dr. Xiao Wu
Dr. Fan Zhang
Guest Editors

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. 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 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

  • gas turbine
  • waste heat recovery
  • combined cycle
  • heat recovery steam generators
  • organic Rankine cycle
  • supercritical carbon dioxide power cycle
  • efficiency enhancement

Published Papers (1 paper)

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Research

20 pages, 8151 KiB  
Article
Dynamic Modeling and Control of Supercritical Carbon Dioxide Power Cycle for Gas Turbine Waste Heat Recovery
by Bowen Ma, Fan Zhang, Kwang Y. Lee, Hemin Hu, Tao Wang and Bing Zhang
Energies 2024, 17(6), 1343; https://doi.org/10.3390/en17061343 - 11 Mar 2024
Viewed by 412
Abstract
The gas turbine is a crucial piece of equipment in the energy and power industry. The exhaust gas has a sufficiently high temperature to be recovered for energy cascade use. The supercritical carbon dioxide (S-CO2) Brayton cycle is an advanced power [...] Read more.
The gas turbine is a crucial piece of equipment in the energy and power industry. The exhaust gas has a sufficiently high temperature to be recovered for energy cascade use. The supercritical carbon dioxide (S-CO2) Brayton cycle is an advanced power system that offers benefits in terms of efficiency, volume, and flexibility. It may be utilized for waste heat recovery (WHR) in gas turbines. This study involved the design of a 5 MW S-CO2 recompression cycle specifically for the purpose of operational control. The dynamic models for the printed circuit heat exchangers, compressors, and turbines were developed. The stability and dynamic behavior of the components were validated. The suggested control strategies entail utilizing the cooling water controller to maintain the compressor inlet temperature above the critical temperature of CO2 (304.13 K). Additionally, the circulating mass flow rate is regulated to modify the output power, while the exhaust gas flow rate is controlled to ensure that the turbine inlet temperature remains within safe limits. The simulations compare the performance of PI controllers tuned using the SIMC rule and ADRC controllers tuned using the bandwidth method. The findings demonstrated that both controllers are capable of adjusting operating conditions and effectively suppressing fluctuations in the exhaust gas. The ADRC controllers exhibit a superior control performance, resulting in a 55% reduction in settling time under the load-tracking scenario. Full article
(This article belongs to the Special Issue Waste Heat Recovery Optimization in Gas Turbines)
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