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Advanced Research in Combustion Energy: Optimization, Applications, and Analysis
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Advanced Research in Combustion Energy: Optimization, Applications, and Analysis

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

Deadline for manuscript submissions: 31 July 2024 | Viewed by 2344

Special Issue Editor

Dr. Zekai Hong

E-Mail Website
Guest Editor
Aerospace Research Center, National Research Council of Canada, Ottawa, ON K1A 0R6, Canada
Interests: combustion; laser diagnostics; chemical kinetics; combustion instability; shock wave

Special Issue Information

Dear Colleagues,

Recent research and development activities aimed at achieving sustainable energy conversion include the development of new energy-conversion devices as well as the optimization of existing ones. Advanced research on combustion energy is vital for taking full advantage of recent breakthroughs in electrification, including advanced energy storage technologies and renewable electricity generation, and advanced fuels, including hydrogen, ammonia, and biofuels. One focus of this Special Issue is zero- and low-carbon fuels and related carbon-neutral combustion technologies. This includes analysis and optimization of the performance of combustion devices that are designed to be either on 100% non-conventional renewable fuels or to be fuel-flexible, which means they use up to 100% renewable fuels. One unique challenge for a fuel-flexible combustion engine is to co-optimize higher-efficiency engines and high-performance fuels while being 100% renewable fuel compliant. The other aspect this Special Issue is focused on is the co-optimization and applications of combustion engines in electrified or hybrid systems. The electrification and hybridization of energy systems enable combustion devices for new applications and/or better optimizations. This Special Issue presents state-of-the-art research and innovation in combustion energy, from fundamental analysis and optimization to practical applications.

Dr. Zekai Hong
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. 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

  • advanced fuels
  • carbon-neutral combustion
  • co-optimization
  • fuel flexibility
  • electrification
  • hybridization

Published Papers (2 papers)

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Research

19 pages, 778 KiB  
Article
Data-Based In-Cylinder Pressure Model with Cyclic Variations for Combustion Control: An RCCI Engine Application
by Maarten Vlaswinkel and Frank Willems
Energies 2024, 17(8), 1881; https://doi.org/10.3390/en17081881 - 15 Apr 2024
Viewed by 339
Abstract
Cylinder-pressure-based control is a key enabler for advanced pre-mixed combustion concepts. In addition to guaranteeing robust and safe operation, it allows for cylinder pressure and heat release shaping. This requires fast control-oriented combustion models. Over the years, mean-value models have been proposed that [...] Read more.
Cylinder-pressure-based control is a key enabler for advanced pre-mixed combustion concepts. In addition to guaranteeing robust and safe operation, it allows for cylinder pressure and heat release shaping. This requires fast control-oriented combustion models. Over the years, mean-value models have been proposed that can predict combustion metrics (e.g., gross indicated mean effective pressure (IMEPg), or the crank angle where 50% of the total heat is released (CA50)) or models that predict the full in-cylinder pressure. However, these models are not able to capture cycle-to-cycle variations. The inclusion of the cycle-to-cycle variations is important in the control design for combustion concepts, like reactivity-controlled compression ignition, that can suffer from large cycle-to-cycle variations. In this study, the in-cylinder pressure and cycle-to-cycle variations are modelled using a data-based approach. The in-cylinder conditions and fuel settings are the inputs to the model. The model combines principal component decomposition and Gaussian process regression. A detailed study is performed on the effects of the different hyperparameters and kernel choices. The approach is applicable to any combustion concept, but is most valuable for advance combustion concepts with large cycle-to-cycle variation. The potential of the proposed approach is successfully demonstrated for a reactivity-controlled compression ignition engine running on diesel and E85. The average prediction error of the mean in-cylinder pressure over a complete combustion cycle is 0.051 bar and of the corresponding mean cycle-to-cycle variation is 0.24 bar2. This principal-component-decomposition-based approach is an important step towards in-cylinder pressure shaping. The use of Gaussian process regression provides important information on cycle-to-cycle variation and provides next-cycle control information on safety and performance criteria. Full article
(This article belongs to the Special Issue Advanced Research in Combustion Energy: Optimization, Applications, and Analysis)
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20 pages, 2442 KiB  
Article
Climate Change Mitigation in Thailand’s Domestic Aviation: Mitigation Options Analysis towards 2050
by Arthit Champeecharoensuk, Shobhakar Dhakal and Nuwong Chollacoop
Energies 2023, 16(20), 7199; https://doi.org/10.3390/en16207199 - 22 Oct 2023
Viewed by 1684
Abstract
Thailand’s civil aviation industry has expanded rapidly in the past ten years resulting in increasing aviation greenhouse gas (GHG) emissions and energy consumption. The rapid growth in air transport is anticipated to continue further. Presently, domestic aviation and the economy of many countries [...] Read more.
Thailand’s civil aviation industry has expanded rapidly in the past ten years resulting in increasing aviation greenhouse gas (GHG) emissions and energy consumption. The rapid growth in air transport is anticipated to continue further. Presently, domestic aviation and the economy of many countries are recovering rapidly in the post-COVID-19 period, resulting in fuel consumption and GHG emissions gradually increasing again. However, despite implementing the ICAO’s CORSIA (International Civil Aviation Organization’s Carbon Offsetting and Reduction Scheme for International Aviation) rule for international aviation, GHG emissions in the domestic aviation sector are largely unregulated. Moreover, the literature lacks a GHG emissions analysis that considers this sector’s potential growth and mitigation policies for future GHG emissions. To close the gap, this study conducted a GHG emissions analysis from this sector under various scenarios through 2050 using historical data during 2008–2020 to forecast future trends. It evaluates the impact of the mitigation policies, such as fuel switching and aircraft technology, on improving fuel efficiency due to technological advancements in aircraft and carbon pricing. The results show that the fuel switching option would result in a significant long-term reduction in GHG emissions, whereas the carbon pricing option and aircraft technology option are desirable in reducing GHG emissions in the short term. Therefore, to meet GHG emissions reduction targets more successfully, all measures must be simultaneously executed to address short- and long-term mitigation strategies. These findings have significant implications for both present and future GHG emissions reduction measures, supporting Thailand’s 2050 climate targets and energy efficiency policies as the domestic aviation industry adjusts. Full article
(This article belongs to the Special Issue Advanced Research in Combustion Energy: Optimization, Applications, and Analysis)
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