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Internal Combustion Engine Performance 2024

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

Deadline for manuscript submissions: 25 September 2024 | Viewed by 891

Special Issue Editor


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Guest Editor
Department of Mechanical Engineering Educators, School of Pedagogical and Technological Education (ASPETE), 14121 Heraklion, Greece
Interests: I.C. engine performance modelling; I.C. engine pollutant emissions; I.C. engine heat transfer; I.C. engine exhaust heat recuperation
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Special Issue Information

Dear Colleagues,

The internal combustion (IC) engine is one of the most important and successful technological developments of the last century. Its application during all of these years and up until today has influenced practically every aspect of human life, having been used as the prime driving force in land, sea and air transportation, as the main source of electrical power production and in emergency safety installations in institutions such as hospitals or factories.

The main reasons for its enormous distribution and success are the high energy density of liquid hydrocarbon fuels combined with the ability of the I.C. engine to efficiently cover the total extent of energy demand from a fraction of a W to several dozen MW.

The world energy crisis and its environmental impact have played a major role in the development of the internal combustion engine during the last few decades. During these years it became clear that a stronger understanding of the thermodynamic processes that occur within the engine is necessary. As a result, research on I.C. engines has expanded enormously, on both simulation and experimental bases. Nowadays, the main objectives are the improvement of engine performance, the minimization of fuel consumption/CO2 emissions and a reduction in the level of exhaust pollutants. To this end, various alternative combustion techniques have been developed, or are currently under development (e.g., direct-injection SI engines, HCCI operations, etc.), and, in parallel, various internal and after-treatment exhaust measures are also being examined.

The present Special Issue for Energies, entitled “Internal Combustion Engine Performance”, has already had a successful presence in this journal for four years under the supervision of the current Guest Editor team. During this period, many interesting papers of high quality have been published in the Special Issue. This is clear proof that, despite the difficult times and the speculation around this type of energy production, combustion engines are present and alive, they are under continuous improvement and they still play a dominant role in the energy market.

In this context, the 2024 issue of “Internal Combustion Engine Performance” aims to gather further innovative research and offer important developments for the field of the internal combustion engine.

More specifically, topics of interest for the Special Issue include (but are not limited to):

  • Combustion mechanisms in spark and compression ignition engines;
  • Fuel injection and spray formation;
  • Pollutants formation (particulate matter, NOx, CO, HC, noise);
  • Exhaust after-treatment systems (three-way catalysts, oxidation catalysts, diesel and gasoline particulate filters, SCR, NOx adsorbers);
  • Internal measures for emission control (EGR, water injection, etc.);
  • Exhaust heat Recuperation Systems (Rankine cycle, turbocompound etc.);
  • Engine downsizing;
  • Effects on engine structure and design due to increased performance demands;
  • Special problems associated with large-scale two-stroke engines performance and emission reduction;
  • Alternative fuels’ and biofuels’ effects on engine performance and emissions (ethanol, butanol, biodiesel, etc.);
  • Recent advances in internal combustion engines experimentation;
  • Novel combustion systems (HCCI, PCCI and RCCI).

Dr. Georgios Mavropoulos
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

  • engine downsizing
  • combustion mechanisms
  • fuel injection
  • combustion systems
  • engine performance and emissions

Related Special Issue

Published Papers (2 papers)

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Research

44 pages, 1008 KiB  
Article
Exergy Analysis in Highly Hydrogen-Enriched Methane Fueled Spark-Ignition Engine at Diverse Equivalence Ratios via Two-Zone Quasi-Dimensional Modeling
by Dimitrios C. Rakopoulos, Constantine D. Rakopoulos, George M. Kosmadakis, Evangelos G. Giakoumis and Dimitrios C. Kyritsis
Energies 2024, 17(16), 3964; https://doi.org/10.3390/en17163964 (registering DOI) - 9 Aug 2024
Viewed by 196
Abstract
In the endeavor to accomplish a fully de-carbonized globe, sparkling interest is growing towards using natural gas (NG) having as vastly major component methane (CH4). This has the lowest carbon/hydrogen atom ratio compared to other conventional fossil fuels used in engines [...] Read more.
In the endeavor to accomplish a fully de-carbonized globe, sparkling interest is growing towards using natural gas (NG) having as vastly major component methane (CH4). This has the lowest carbon/hydrogen atom ratio compared to other conventional fossil fuels used in engines and power-plants hence mitigating carbon dioxide (CO2) emissions. Given that using neat hydrogen (H2) containing nil carbon still possesses several issues, blending CH4 with H2 constitutes a stepping-stone towards the ultimate goal of zero producing CO2. In this context, the current work investigates the exergy terms development in high-speed spark-ignition engine (SI) fueled with various hydrogen/methane blends from neat CH4 to 50% vol. fraction H2, at equivalence ratios (EQR) from stoichiometric into the lean region. Experimental data available for that engine were used for validation from the first-law (energy) perspective plus emissions and cycle-by-cycle variations (CCV), using in-house, comprehensive, two-zone (unburned and burned), quasi-dimensional turbulent combustion model tracking tightly the flame-front pathway, developed and reported recently by authors. The latter is expanded to comprise exergy terms accompanying the energy outcomes, affording extra valuable information on judicious energy usage. The development in each zone, over the engine cycle, of various exergy terms accounting too for the reactive and diffusion components making up the chemical exergy is calculated and assessed. The correct calculation of species and temperature histories inside the burned zone subsequent to entrainment of fresh mixture from the unburned zone contributes to more exact computation, especially considering the H2 percentage in the fuel blend modifying temperature-levels, which is key factor when the irreversibility is calculated from a balance comprising all rest exergy terms. Illustrative diagrams of the exergy terms in every zone and whole charge reveal the influence of H2 and EQR values on exergy terms, furnishing thorough information. Concerning the joint content of both zones normalized exergy values over the engine cycle, the heat loss transfer exergy curves acquire higher values the higher the H2 or EQR, the work transfer exergy curves acquire slightly higher values the higher the H2 and slightly higher values the lower the EQR, and the irreversibility curves acquire lower values the higher the H2 or EQR. This exergy approach can offer new reflection for the prospective research to advancing engines performance along judicious use of fully friendly ecological fuel as H2. This extended and in-depth exergy analysis on the use of hydrogen in engines has not appeared in the literature. It can lead to undertaking corrective actions for the irreversibility, exergy losses, and chemical exergy, eventually increasing the knowledge of the SI engines science and technology for building smarter control devices when fueling the IC engines with H2 fuel, which can prove to be game changer to attaining a clean energy environment transition. Full article
(This article belongs to the Special Issue Internal Combustion Engine Performance 2024)
17 pages, 2041 KiB  
Article
Assessment of Engine Performance and Emissions with Eucalyptus Oil and Diesel Blends
by Robert Mădălin Chivu, Jorge Martins, Florin Popescu, Margarida Gonçalves, Krisztina Uzuneanu, Michael Frătița and Francisco P. Brito
Energies 2024, 17(14), 3528; https://doi.org/10.3390/en17143528 - 18 Jul 2024
Viewed by 357
Abstract
This research evaluates the feasibility of using eucalyptus oil blended with conventional diesel fuel in diesel engines. Eucalyptus globulus is one of the main tree species cultivated for paper pulp in western European countries such as Portugal, and eucalyptus oil is one of [...] Read more.
This research evaluates the feasibility of using eucalyptus oil blended with conventional diesel fuel in diesel engines. Eucalyptus globulus is one of the main tree species cultivated for paper pulp in western European countries such as Portugal, and eucalyptus oil is one of the byproducts that so far has not been sufficiently evaluated as a biofuel. This study assesses the impact of using this additive on engine performance parameters and emissions as a means to contribute to reducing fossil fuel consumption and pollutant and greenhouse gas (GHG) emissions. The analysis revealed that the addition of eucalyptus oil had a positive effect on torque, a critical performance parameter, with biofuel blends showing consistent torque increases at lower engine speeds. However, torque tended to decrease towards the higher range of engine speed for eucalyptus oil–diesel blends. Several blends showed lower brake specific fuel consumption compared to regular diesel at high engine loads and low engine speeds. Brake thermal efficiency did not vary substantially at lower engine speeds and loads but decreased at higher speeds and loads. Pollutant emissions, particularly unburned hydrocarbons and nitrogen oxides, were influenced by fuel composition, with biofuel blends showing both increases and decreases compared to diesel. It is noteworthy that eucalyptus oil blends exhibited up to a 60% reduction in smoke opacity under specific operating conditions at low speed and high load for 10% incorporation (10EU90D), suggesting that in addition to the already positive effects of cutting down fossil CO2 emissions in proportion to the substitution of fossil diesel with nearly carbon-neutral eucalyptus oil, more environmental benefits may be expected from the incorporation of this product. Although the present economic viability of using eucalyptus oil as a biofuel is still not guaranteed, the present study seems to reinforce its technical viability. Future prospects for the improvement of oil yield through biotechnology, the economic interest of this product for several countries, and the updating and upscaling industrial processes may allow the viability of this biofuel to remain a possibility in the future Full article
(This article belongs to the Special Issue Internal Combustion Engine Performance 2024)
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