An overview on the Miller-Atkinson over-expansion thermodynamic cycle

Niculae, Mihai; Clenci, Adrian; Iorga-Simăn, Victor; Niculescu, Rodica Mariana

doi:10.1088/1757-899x/564/1/012125

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…Biodiesel properties specifications, such as kinematic viscosity, flash point, cloud point, pour point, and cetane number, have been issued by standardization bodies like the American Society for Testing and Materials (ASTM) and European Standards (EN) as guidelines for the biodiesel production to enable commercial viability in a climatic variation [11].According to the ASTM 6751, biodiesel is a fuel that is defined as being made of mono-alkyl esters of long chain fatty acids and can be generated from either vegetable oils or animal fats . As a result of the fact that it possesses the same physico-chemical properties as traditional fossil fuel, it is capable of completely or partially replacing fossil diesel fuel in compression ignition engines [12], [13] .…”

Section: Introductionmentioning

confidence: 99%

Production of first and second-generation biodiesel for diesel engine operation: A review

Mohammed Saleh,

Bahari Alias,

Mohammed Saleh

et al. 2023

NTU-JRE

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Researchers are looking at alternative cleaner technologies to fulfill the rising need for greener fuels. For this reason, alternatives like bioethanol and biodiesel have become commercially available. Renewable fuels are classified as either "first generation," "second generation," or "third generation" depending on the feedstock used in their manufacture. Over the past decade, society's reliance on first-generation biofuel feedstocks has created an inbuilt rivalry between food and fuel. Second-generation biofuel feed-stocks, such as non-edible agricultural waste products, energy crops, and crop residues, have been illuminated by emerging technical prospects. Technologies for producing biofuels have been proposed and developed in multiple stages, with first-generation technologies being the most developed. In several nations, including the United States, corn grain is used as feedstock in bio-refineries. There is a risk that food and fuel prices will rise as a result of the usage of edible materials in crops like corn. Second-generation biofuel manufacturing technology that utilizes crop residues has been developed to deal with this kind of problem. This study investigates and evaluates the economic viability and environmental sustainability of the proposed solution for the production of second-generation biodiesel.

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Section: Introductionmentioning

confidence: 99%

Production of first and second-generation biodiesel for diesel engine operation: A review

Mohammed Saleh,

Bahari Alias,

Mohammed Saleh

et al. 2023

NTU-JRE

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“…By applying different intake valve closing (IVC) degrees on an MC engine, an over-expanded cycle is created where its volumetric expansion ratio is greater than the effective volumetric compression ratio. The change in IVC is divided into two strategies: the late intake valve closing (LIVC) and early intake valve closing (EIVC) [8,9]. The LIVC is mainly associated with the Atkinson cycle and its function is to keep the intake valve open during the compression stroke.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Multi-Parametric Optimisation of the Performance and Exhaust Gas Emissions of a Heavy-Duty Diesel Engine Operating on Miller Cycle

Georgiou

Azimov

2020

Energies

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A major issue nowadays that concerns the pollution of the environment is the emissions emerging from heavy-duty internal combustion engines. Such concern is dictated by the fact that the electrification of heavy-duty transport still remains quite challenging due to limitations associated with mileage, charging speed and payload. Further improvements in the performance and emission characteristics of conventional heavy-duty diesel engines are required. One of a few feasible approaches to simultaneously improve the performance and emission characteristics of a diesel engine is to convert it to operate on Miller cycle. Therefore, this study was divided into two stages, the first stage was the simulation of a heavy-duty turbocharged diesel engine (4-stroke, 6-cylinder and 390 kW) to generate data that will represent the reference model. The second stage was the application of Miller cycle to the conventional diesel engine by changing the degrees of intake valve closure and compressor pressure ratio. Both stages have been implemented through the specialist software which was able to simulate and represent a diesel engine based on performance and emissions data. An objective of this extensive investigation was to develop several models in order to compare their emissions and performances and design a Miller cycle engine with an ultimate goal to optimize diesel engine for improved performance and reduced emissions. This study demonstrates that Miller cycle diesel engines could overtake conventional diesel engines for the reduced exhaust gas emissions at the same or even better level of performance. This study shows that, due to the dependence of engine performance on complex multi-parametric operation, only one model achieved the objectives of the study, more specifically, engine power and torque were increased by 5.5%, whilst nitrogen oxides and particulate matter were decreased by 30.2% and 5.5%, respectively, with negligible change in specific fuel consumption and CO2, as average values over the whole range of engine operating regimes.

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A Study on the Influence of the Miller Cycle upon the Engine’s Internal Aerodynamics

Niculae

Clenci

Iorga-Simăn

et al. 2019

The 30th SIAR International Congress of Automotive and Transport Engineering

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An overview on the Miller-Atkinson over-expansion thermodynamic cycle

Cited by 6 publications

References 5 publications

Production of first and second-generation biodiesel for diesel engine operation: A review

Production of first and second-generation biodiesel for diesel engine operation: A review

Analysis and Multi-Parametric Optimisation of the Performance and Exhaust Gas Emissions of a Heavy-Duty Diesel Engine Operating on Miller Cycle

A Study on the Influence of the Miller Cycle upon the Engine’s Internal Aerodynamics

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