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Energies
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Controlling of Combustion Process in Energy and Power Systems
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Controlling of Combustion Process in Energy and Power Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "I2: Energy and Combustion Science".

Deadline for manuscript submissions: closed (30 May 2023) | Viewed by 8842

Special Issue Editors

Dr. Yaojie Tu

E-Mail Website
Guest Editor
School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: low-NOx combustion technology; combustion diagnostics; ammonia combustion
Special Issues, Collections and Topics in MDPI journals
Dr. Qingguo Peng

E-Mail Website
Guest Editor
School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
Interests: power engineering; engineering thermal science

Special Issue Information

Dear Colleagues,

Although the development of renewable energy is currently receiving increasing attention, the global energy supply still heavily relies on combustion process via burning both fossil fuels and traditional biomass in sectors such as boilers, internal combustion engines, gas turbines, and kilns. In order to obtain a higher efficiency while mitigating the environmental impact of these different energy and power systems, it is necessary to effectively control the combustion process in terms of flame temperature, localized oxidizing condition, flue gas residence time, etc. For such aims, manners such as adjusting burner geometries, fuel compositions, injection angles, and air split ratios are usually taken. On the other hand, the control logic is also important and influential to the safe, stable, and economic operation of the combustion system. Therefore, it is of great significance to control combustion process from both hardware and software perspectives.

This Special Issue aims to publish critical reviews and in-depth technical research papers on combustion process control in energy and power systems, with emphasis on combustion efficiency and pollutant emissions.

The topics of interest for this Special Issue include, but are not limited to, the following:

  • Advanced combustion control strategies and technologies;
  • Combustion pollutant emission control concepts and methods;
  • High-efficiency and low-emission combustion theories and technologies;
  • Control methods of combustion diagnostics and measurement;
  • Combustion control of low-carbon fuels;
  • Process modeling and control of combustion systems.

Dr. Yaojie Tu
Dr. Qingguo Peng
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

  • combustion optimization
  • combustion system control
  • pollutant emission control
  • advanced combustion technologies

Published Papers (5 papers)

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Research

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16 pages, 4608 KiB  
Article
Preheating Analysis of Semi-Coke in a Circulating Fluidized Bed and Its Kinetic Characteristics
by Jiahang Zhang, Jianguo Zhu and Jingzhang Liu
Energies 2023, 16(10), 4124; https://doi.org/10.3390/en16104124 - 16 May 2023
Viewed by 868
Abstract
Semi-coke has difficulties with stable ignition and high-efficiency combustion due to its low volatile content. Preheating in a circulating fluidized bed before combustion offers a novel method for the improvement of fuel properties. During preheating, the semi-coke was converted to preheated fuel composed [...] Read more.
Semi-coke has difficulties with stable ignition and high-efficiency combustion due to its low volatile content. Preheating in a circulating fluidized bed before combustion offers a novel method for the improvement of fuel properties. During preheating, the semi-coke was converted to preheated fuel composed of coal gas and preheated char. When increasing the preheating temperature, the ratio of CO/CO2 in the coal gas significantly increased, while the ratio of CH4/CO2 remained almost unchanged. After preheating, the release ratios for different species from the semi-coke followed the order C >H > N > S. Thermogravimetric analysis was used to evaluate the kinetic characteristics. We found that the ignition and burnout temperatures of the preheated char decreased compared to those of the semi-coke, and the reaction rate constant for the preheated char increased by 20 times. Three models were used to predict the variations in the conversion ratio with time, and the modified volumetric reaction model showed good agreement with the experiment. This investigation provides support for better developing preheating combustion technology in the future. Full article
(This article belongs to the Special Issue Controlling of Combustion Process in Energy and Power Systems)
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19 pages, 2727 KiB  
Article
Numerical Investigation on the Impact of Exergy Analysis and Structural Improvement in Power Plant Boiler through Co-Simulation
by Hang Yin, Yingai Jin, Liang Li and Wenbo Lv
Energies 2022, 15(21), 8133; https://doi.org/10.3390/en15218133 - 31 Oct 2022
Cited by 1 | Viewed by 1091
Abstract
In current power station boilers, fuel burns at a low temperature, which results in low exergy efficiency. This research combined the second law of t with the boiler structure to maximize the efficiency of a 350 MW power plant boiler. A three-dimensional simulation [...] Read more.
In current power station boilers, fuel burns at a low temperature, which results in low exergy efficiency. This research combined the second law of t with the boiler structure to maximize the efficiency of a 350 MW power plant boiler. A three-dimensional simulation of the combustion process at the power plant boiler is performed. A one-dimensional simulation model of the boiler is then constructed to calculate the combustion exergy loss, heat transfer exergy loss, and boiler exergy efficiency. Under the principle of high-temperature air combustion technologies, this paper also proposes a new structure and improved operating parameters to improve the exergy efficiency of boilers by reducing the heat exchange area of the economizer and increasing the heat exchange area of the air preheater. Simulation results show that the exergy efficiency of the boiler increased from 47.29% to 48.35% through the modified model. The simulation outcomes can instruct future optimal boiler design and controls. Full article
(This article belongs to the Special Issue Controlling of Combustion Process in Energy and Power Systems)
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18 pages, 4859 KiB  
Article
Simulation Tool for the Development of a Staged Combustion Pellet Stove Controller
by Daniel Lustenberger, Joris Strassburg, Tom Strebel, Fabienne Mangold and Timothy Griffin
Energies 2022, 15(19), 6969; https://doi.org/10.3390/en15196969 - 23 Sep 2022
Cited by 1 | Viewed by 1191
Abstract
Optimizing the combustion control concepts on a pellet stove with very low heat output is time-consuming and costly. In order to shorten the required laboratory test time, a 0-D transient tool was developed within the ERA-NET project “LowEmi-MicroStove”, which simulates a 4 kW [...] Read more.
Optimizing the combustion control concepts on a pellet stove with very low heat output is time-consuming and costly. In order to shorten the required laboratory test time, a 0-D transient tool was developed within the ERA-NET project “LowEmi-MicroStove”, which simulates a 4 kW pellet stove with staged combustion and heat transfer. This approach was chosen in order to greatly simplify the description of the combustion processes and so reduce the computational complexity and simulation time. The combustion of a bed of pellets is modeled as a superposition of the combustion cycles of individual pellets, assuming no interactions between pellets. A test setup was developed and used to determine the ignition and burning cycle of individual pellets. The description of the CO emissions behavior is based upon an empirically grounded relation which is in turn based on the air/fuel ratio and the combustion chamber temperature. For the validation of the 0-D simulation results, a test rig for a 4 kW pellet stove was built. Despite its simplistic approach, good agreement was found between the simulation and 4 kW pellet stove test results for the mean values and temporal fluctuations of flue gas temperature and oxygen and carbon monoxide content during start up, stable operation and load changes. The simulation could thus be used to quantify the effect of air flow rates and distribution as well as load changes on performance and draw conclusions regarding different process control strategies. A control strategy which can operate the stove at high temperatures near the air stoichiometric limit with acceptable CO emissions has been proven to be the most promising. Additionally, the model can be used to quantify the effects of variations in other process parameters, for example the impact of fluctuations in the pellet feed. Due to its effectiveness and simplicity, this model approach can be applied for the development of control strategies for other staged, pellet combustion systems. Full article
(This article belongs to the Special Issue Controlling of Combustion Process in Energy and Power Systems)
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23 pages, 6190 KiB  
Article
Effects of Different Exhaust Gas Recirculation (EGR) Rates on Combustion and Emission Characteristics of Biodiesel–Diesel Blended Fuel Based on an Improved Chemical Mechanism
by Huiqiong Huang, Jie Tian, Jiangtao Li and Dongli Tan
Energies 2022, 15(11), 4153; https://doi.org/10.3390/en15114153 - 05 Jun 2022
Cited by 4 | Viewed by 1821
Abstract
This paper studies the effects of different exhaust gas recirculation (EGR) rates (0%, 5%, 10%, and 15%) on the combustion, performance, and emission characteristics of a biodiesel–diesel (20% biodiesel + 80% diesel) blended fuel engine. This paper mainly analyzes the effects on engine [...] Read more.
This paper studies the effects of different exhaust gas recirculation (EGR) rates (0%, 5%, 10%, and 15%) on the combustion, performance, and emission characteristics of a biodiesel–diesel (20% biodiesel + 80% diesel) blended fuel engine. This paper mainly analyzes the effects on engine cylinder temperature, cylinder pressure, brake thermal efficiency (BTE), brake-specific fuel consumption (BSFC), NOx emissions, carbon monoxide (CO) emissions, hydrocarbon (HC) emissions, and soot emissions. Firstly, a 3D-CFD model was established by using CONVERGE software, combined with an improved chemical kinetic mechanism including 98 species and 314 reactions, and the accuracy of the simulation model was verified by experimental results. Secondly, the effects of different EGR rates on the combustion, performance, and emission characteristics of biodiesel–diesel blended fuel were studied. The results showed that with the increase in the EGR rate, the cylinder pressure and cylinder temperature in the cylinder decreased. When the EGR rate was 15%, the maximum cylinder temperature decreased by 4.33%. In addition, BSFC increased and BTE decreased. Moreover, with the increase in the EGR rate, NOx decreased significantly, and the higher the EGR rate, the more obvious the reduction in NOx emissions. When the EGR rate was 15%, NOx was reduced by 78.89%. However, with the increase in the EGR rate, the emissions of soot, HC, and CO increased. The optimal EGR rate for the engine is 10%. Full article
(This article belongs to the Special Issue Controlling of Combustion Process in Energy and Power Systems)
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Review

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28 pages, 16709 KiB  
Review
A Review of Micro Power System and Micro Combustion: Present Situation, Techniques and Prospects
by Zhuang Kang, Zhiwei Shi, Jiahao Ye, Xinghua Tian, Zhixin Huang, Hao Wang, Depeng Wei, Qingguo Peng and Yaojie Tu
Energies 2023, 16(7), 3201; https://doi.org/10.3390/en16073201 - 01 Apr 2023
Cited by 5 | Viewed by 2284
Abstract
Micro burner is the fundamental element of a micro energy power system. The performance, output power, and efficiency of the system are directly involved by the combustion stability, efficiency, and temperature distribution of the exterior wall. Owing to the small combustion space of [...] Read more.
Micro burner is the fundamental element of a micro energy power system. The performance, output power, and efficiency of the system are directly involved by the combustion stability, efficiency, and temperature distribution of the exterior wall. Owing to the small combustion space of the micro burner and the resident short time of the premixed fuel/air, the fuel is difficult to burn completely, resulting in poor burning efficiency and flame stability. Therefore, the study of micro burner technology is the focus of current research to improve combustion performance. This article introduces the micro power system, micro combustion technology, and combustion status and characteristics, focusing on four kinds of micro combustion technology. The purpose is tantamount to fully understand the current status of micro combustion technology and compare the characteristics of different combustion technologies. For improving output power and efficiency of the power system, the combustion stability and performance are enhanced, which provides theoretical support for the effective realization of micro scale combustion and application. Full article
(This article belongs to the Special Issue Controlling of Combustion Process in Energy and Power Systems)
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