Theoretical and experimental investigation of the Miller cycle diesel engine in terms of performance and emission parameters

Gonca, Güven; Şahi̇n, Bahri̇; Parlak, Adnan; Üst, Yasin; Ayhan, Vezir; Cesur, İdris; Boru, Barış

doi:10.1016/j.apenergy.2014.10.043

Cited by 94 publications

(45 citation statements)

References 26 publications

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“…It is clear that the total fuel consumption for the two partially loaded MRDG significantly higher than in other MRDG working under similar voltage. High NO x emission while reducing the load [3,4] Low reservation [5] Increased noise [6] Electromechanical CPC Low loss of power conversion…”

Section: Methods Of Investigationsmentioning

confidence: 99%

Design of the Three-Level Multicriterial Strategy of Hybrid Marine Power Plant Control for a Combined Propulsion Complex

Budashko¹

2017

Elektroteh. elektromeh.

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Purpose. Efficiency of hybrid ships power plants (SPP) combined propulsion complexes (CPC) by various criteria for energy management systems strategies. Methodology. Based on the classification system topologies SPP CPC for mechanical, electrical and hybrid types of motors schematic diagrams of management strategies for the criterion of minimum power consumption are defined. Changing the technical component of the traditional approach to building hybrid ships electric power systems (SEPS) SPP CPC the principle of modifying the structure of SEPS is applied with the integration of additional static alternative power source as dynamic reserve, which allowed to meet modern requirements for energy efficiency, levels of vibration, noise and degradation effects produced to SPP CPC, in all areas of the energy for the transfer of power from energy to propellers. Modeling of power transmission of energy to propellers in MatLab/Simulink is conducted, using blocks of optimization library and definition of identity markers. Results. Major advantages and disadvantages SPP CPC depending on the topology of energy distribution systems are determined. According to the chosen structure system electricity characteristics were obtained in the process of power transmission SPP CPC and power systems and their control strategies in terms of increased efficiency and eliminate these drawbacks. And finally, mathematical apparatus for research in terms of the development of methods for designing and managing SPP hybrid CPC to reduced fuel consumption, emissions into the environment and improving maintainability, flexibility and comfort level are improved. Originality. The methodology for improving SPP CPC implementation by developing methods of identification markers mutually influencing processes in SPP CPC and the development of implementing these methods of settlement and information systems. Practical value. The method enables iterative optimization parameters SPP CPC, it can be used as a means of intelligent design, which is the result of the application of improved performance SPP CPC. References 49, table 1, figures 12. Key words: ship power plants, combined propulsion complexes, energy management system, control strategy.На основании системной классификации топологий судовых энергетических установок (СЭУ) комбинированных пропульсивних комплексов (КПК) были систематизированы основные преимущества и недостатки СЭУ КПК в зависимости от топологии системы управления распределением энергии. Были получены характеристики процессов передачи мощности в СЭУ КПК и системах энергоснабжения, и их стратегий контроля с точки зрения повышения эффективности и устранения указанных недостатков. Усовершенствован математический аппарат для проведения исследований с точки зрения разработки методов проектирования и управления гибридными СЭУ КПК с сокращением потребления топлива, выбросов в окружающую среду и повышении ремонтопригодности, маневренности и уровня комфорта. Разработанный метод дает возможность итерационной оптимизации параметров СЭУ КПК, что ...

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Section: Methods Of Investigationsmentioning

confidence: 99%

Design of the Three-Level Multicriterial Strategy of Hybrid Marine Power Plant Control for a Combined Propulsion Complex

Budashko¹

2017

Elektroteh. elektromeh.

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“…In the initial position, the angle between the bar and the horizontal direction is 0 E and it is considered as known. The roll of radius 2 R is in contact, at any moment, with the head of the valve, head considered as an arc of radius 1 R . The center of the arc is always situated at the distance d , considered known, from the vertical axis.…”

Section: The Mechanismmentioning

confidence: 99%

“…1 and consists in the bar OB of length equal to 1 l and having at its end a roll of radius 2 R . In the initial position, the angle between the bar and the horizontal direction is 0 E and it is considered as known.…”

Section: The Mechanismmentioning

confidence: 99%

“…The bar (lever) OB of length 1 l rotates around the point O such that the roll of radius 2 R remains all the time tangent to the arc of radius 1 R . The new angle between the lever and the horizontal direction is E .…”

Section: The Mechanismmentioning

confidence: 99%

“…Some advantages of the Miller-Atkinson [1][2][3][4][5][6][7][8] cycle are given in [9,10] and we will not repeat the presentation here.…”

Section: Introductionmentioning

confidence: 99%

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Elements of Cam’s Synthesis for a Distribution Mechanism for the Miller-Atkinson Cycle

Dragomir¹,

Mănescu²,

Stănescu

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this paper we present the synthesis of the cam for a distribution mechanism used for Miller-Atkinson cycle and described in previous works. The input data contain the angles at which the valve opens and closes, respectively, the dimensions of the main parts, the maximum displacement of the valve. and the law of motion of the valve. The authors consider that the law of motion of the valve is described by numerical values, even if in the simulation process they use analytical formulae for this displacement. The head of the valve is considered to be circular. A particular case of flat head of the valve is also described. The relative displacement of the lever and the valve is discussed in two hypotheses: symmetric position and asymmetric position of the contact point with respect to the axis of the valve. The contact between the head of the valve is assured by a cylindrical roller. The contact between the cam and the lever is considered with a roller tappet. In all cases the cam is obtained by numerical synthesis using a convenient angular degree. A great attention is paid to the convexity of the cam. The resulted cam is transformed in a convex one using the Jarvis March. The authors also perform a comparison between the theoretical profile of the cam and the profile of the convex cam. The reduced velocity and acceleration are obtained in all cases. Some aspects of the wear are discussed using the relative linear and angular velocities. The paper closes with a paragraph of conclusions.

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Performance analysis of a novel eco‐friendly internal combustion engine cycle

Gonca

Şahi̇n

2019

Int J Energy Res

Self Cite

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Summary The Miller cycle applications have been performed to diminish NOx released from internal combustion engines (ICEs), in recent years. The Miller cycle provides decreased compression ratio and enhanced expansion ratio; hereby, maximum in‐cylinder combustion temperatures diminish, and NOx formations slow down remarkably. Another less‐known method is Takemura cycle application, which provides heat addition into engine cylinder at constant combustion temperatures. In this study, a novel cycle including the Miller cycle and the Takemura cycle has been developed by using novel numerical models and computing methods with seven processes and a novel way to decrease NOx emissions at higher levels compared with the single applications of known cycles. A comprehensive performance examination of the proposed cycle engine in terms of performance characteristics such as effective power (EFP), effective power density (EFPD), exergy destruction (X), exergy efficiency (ε), and ecological coefficient of performance (ECOP) has been conducted. The impacts of engine operating and design parameters on the performance characteristics have been computationally examined. Furthermore, irreversibilities depending on incomplete combustion loss (INCL), exhaust output loss (EXOL), heat transfer loss (HTRL), and friction loss (FRL) have been considered in the performance simulations. The minimum exergy destruction and maximum performance specifications have been observed with 30 of the compression ratio. Maximum effective power values have been obtained at range between 1 and 1.2 of equivalence ratio. The optimum range for exergy efficiency is between 0.8 and 1 of equivalence ratio. Increasing engine speed has provided enhancing effective power. However, an optimum range has been found for the exergy efficiency that is interval of 3000 to 4000 rpm. The results obtained can be assessed by researchers studying on modeling of the engine systems and designs.

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Theoretical and experimental investigation of the Miller cycle diesel engine in terms of performance and emission parameters

Cited by 94 publications

References 26 publications

Design of the Three-Level Multicriterial Strategy of Hybrid Marine Power Plant Control for a Combined Propulsion Complex

Design of the Three-Level Multicriterial Strategy of Hybrid Marine Power Plant Control for a Combined Propulsion Complex

Elements of Cam’s Synthesis for a Distribution Mechanism for the Miller-Atkinson Cycle

Performance analysis of a novel eco‐friendly internal combustion engine cycle

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