A non-endoreversible Otto cycle model: improving power output and efficiency

Angulo‐Brown, F.; Rocha-Martínez, J A; Navarrete-González, T D

doi:10.1088/0022-3727/29/1/014

Cited by 61 publications

(41 citation statements)

References 15 publications

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“…[2][3][4] Work output and efficiency of the cycle are maximised and optimum criteria of some important parameters are given. It is found that the increase in heat leak losses always reduces the efficiency and the friction losses always reduce both the work output and efficiency.…”

Section: Discussionmentioning

confidence: 99%

“…Many significant achievements have been made to analyse and optimise the performance of the Otto heat engine. [1][2][3][4][5][6][7][8][9] An irreversible simplified model for the air standard Otto cycle was proposed to study the effect of friction losses on the performance of the cycle. [2][3][4] The analyses can be drawn from two main hypotheses:…”

Section: Introductionmentioning

confidence: 99%

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Irreversible Otto heat engine with friction and heat leak losses and its parametric optimum criteria

Zhao¹,

Chen²

2008

Journal of the Energy Institute

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A more realistic simplified model for an irreversible Otto cycle is established by considering the heat leak losses through the cylinder and internally dissipative friction, in which it is assumed that the piston velocity in the adiabatic processes obeys a pure sinusoidal law. The optimally operating region of the irreversible Otto heat engine is determined. The model avoids the usual hypotheses of endoreversible heat engines and the simple description of irreversible heat engines so that the results obtained here may include the performance characteristics of some simplified Otto cycle models.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Irreversible Otto heat engine with friction and heat leak losses and its parametric optimum criteria

Zhao¹,

Chen²

2008

Journal of the Energy Institute

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“…AnguloBrown et al [8] provide an irreversible model that encompasses global friction losses within the cycle. The work is expanded in a subsequent work to include an irreversibility parameter within the cycle [9]. Calvo Hernandez et al [10] further develop this model to account for non-instantaneous adiabatic strokes.…”

Section: The Otto Cycle Model Brief Review Of Established Methodsmentioning

confidence: 99%

Validation of a Simulation Model for a Combined Otto and Stirling Cycle Power Plant

McGovern¹,

Cullen²,

Feidt

et al. 2010

ASME 2010 4th International Conference on Energy Sustainability, Volume 2

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A project has been underway at the Dublin Institute of Technology (DIT) to investigate the feasibility of a combined Otto and Stirling cycle power plant in which a Stirling cycle engine would serve as a bottoming cycle for a stationary Otto cycle engine. This type of combined cycle plant is considered to have good potential for industrial use. This paper describes work by DIT and collaborators to validate a computer simulation model of the combined cycle plant. In investigating the feasibility of the type of combined cycle that is proposed there are a range of practical realities to be faced and addressed. Reliable performance data for the component engines are required over a wide range of operating conditions, but there are practical difficulties in accessing such data. A simulation model is required that is sufficiently detailed to represent all important performance aspects and that is capable of being validated. Thermodynamicists currently employ a diverse range of modeling, analysis and optimization techniques for the component engines and the combined cycle. These techniques include traditional component and process simulation, exergy analysis, entropy generation minimization, exergoeconomics, finite time thermodynamics and finite dimensional optimization thermodynamics methodology (FDOT). In the context outlined, the purpose of the present paper is to come up with a practical validation of a practical computer simulation model of the proposed combined Otto and Stirling Cycle Power Plant.

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“…The main OPBs used in ICE cycles analysis and optimization include power (work) and efficiency [74][75][76], power density [77], effective power [78], EF [79][80][81][82][83][84], ecological coefficient of performance (ECOP) [85] and so on. (2)…”

Section: The Study Featuresmentioning

confidence: 99%

“…The first definition is that Angulo-Brown et al [75] used the ratio of entropy change in heat addition process to that in heat rejection process to define the IIL of Otto cycle. Because the SH of heat addition and rejection processes are different, entropy changes for these two processes are different.…”

Section: The Study Featuresmentioning

confidence: 99%

Progress in Finite Time Thermodynamic Studies for Internal Combustion Engine Cycles

Chen

Sun

2016

Entropy

139

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Abstract:On the basis of introducing the origin and development of finite time thermodynamics (FTT), this paper reviews the progress in FTT optimization for internal combustion engine (ICE) cycles from the following four aspects: the studies on the optimum performances of air standard endoreversible (with only the irreversibility of heat resistance) and irreversible ICE cycles, including Otto, Diesel, Atkinson, Brayton, Dual, Miller, Porous Medium and Universal cycles with constant specific heats, variable specific heats, and variable specific ratio of the conventional and quantum working fluids (WFs); the studies on the optimum piston motion (OPM) trajectories of ICE cycles, including Otto and Diesel cycles with Newtonian and other heat transfer laws; the studies on the performance limits of ICE cycles with non-uniform WF with Newtonian and other heat transfer laws; as well as the studies on the performance simulation of ICE cycles. In the studies, the optimization objectives include work, power, power density, efficiency, entropy generation rate, ecological function, and so on. The further direction for the studies is explored.

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A non-endoreversible Otto cycle model: improving power output and efficiency

Cited by 61 publications

References 15 publications

Irreversible Otto heat engine with friction and heat leak losses and its parametric optimum criteria

Irreversible Otto heat engine with friction and heat leak losses and its parametric optimum criteria

Validation of a Simulation Model for a Combined Otto and Stirling Cycle Power Plant

Progress in Finite Time Thermodynamic Studies for Internal Combustion Engine Cycles

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