Efficiency of a Miller engine

Al–Sarkhi, A.; Jaber, J.O.; Probert, S.D.

doi:10.1016/j.apenergy.2005.04.003

Cited by 90 publications

(45 citation statements)

References 23 publications

(35 reference statements)

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“…The eects of equivalence ratio and mean piston speed on the performance of the dual cycle with Q LHV = 44000 kJ kg −1 , ψ = 1.25, L * = 10 cm, N = 4500 rpm, C vf = 1.638 kJ kg [5,11,16,21,22] are shown in Figs. 26.…”

Section: Resultsmentioning

confidence: 99%

“…Al-Sarkhi et al [16] presented theoretical investigations into the Miller cycle engine performance, studying the inuence of the main engine design variables and system irreversibilities. Chen et al [17] built a class of generalized irreversible universal steady ow heat engine cycle model consisting of two heating branches, two cooling branches, and two adiabatic branches with consideration of the losses of heat resistance, heat leakage, and internal irreversibility.…”

Section: Introductionmentioning

confidence: 99%

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Power Optimization of a Miller Thermal Cycle with respect to Residual Gases and Equivalence Ratio

Ebrahimi

2013

Acta Phys. Pol. A

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The performance of an air standard Miller cycle is analyzed using nite-time thermodynamics. The relations between the power output and the compression ratio and between the power output and the thermal eciency are derived by detailed numerical examples. The results show that, throughout the compression ratio range, the power output decreases with increasing residual gases. The results also show that if compression ratio is less than certain value, the power output decreases with increasing equivalence ratio, while if compression ratio exceeds certain value, the power output rst increases and then starts to decrease with increasing equivalence ratio. The conclusions of this investigation are of importance when considering the designs of actual Miller engines.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Power Optimization of a Miller Thermal Cycle with respect to Residual Gases and Equivalence Ratio

Ebrahimi

2013

Acta Phys. Pol. A

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“…1, compared with Otto cycle, for the same piston stroke, Miller cycle can keep the expansion ratio unchanged, and make compression ratio become smaller than expansion ratio，which helps to improve the thermal efficiency. Therefore, Miller cycle has been actively studied by many scholars [6]- [10].…”

Section: Methodsmentioning

confidence: 99%

Performance Study for Miller Cycle Natural Gas Engine Based on GT-Power

Song¹,

Zhang²

2015

JOCET

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Abstract-In order to improve the thermal efficiency of natural gas engine and reduce the NO x emission from engine, this paper presented the technical route which applied Miller cycle to turbocharged lean-burn natural gas engine. GT-Power software was used to model the turbocharged natural gas engine, and simulation research based on Miller cycle was performed according to various engine loads in the engine speed range of 2000-5000rpm. The simulation results showed that, under part load (50% of the engine full load) operating conditions of the turbocharged lean-burn natural gas engine, compared with Otto cycle, Miller cycle can reduce the brake specific fuel consumption (BSFC) and NO x emission. Under high load and low speed as well as moderate load and high speed operating conditions, Miller cycle can effectively reduce the BSFC. Under high load and low speed or high speed operating conditions, the NO x emission can be reduced apparently.

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“…Using the model of SH varied as a linear function of the temperature in [84], the authors of [96,[238][239][240][241] studied the power output and efficiency performance characteristics (work output and efficiency performance characteristics) of EMC [96,238,241] and an irreversible Miller cycle [96,239,240], and investigated the influences of VSH and the two losses on cycle performance. Considering HTL, FL and IIL and fixing the cycle maximum temperature, Yang and He et al [242] [96,[238][239][240][241][242][243][244][245][246], obtained the power output and efficiency performance characteristics of an irreversible Miller cycle, and investigated the influences of their design parameters on cycle performance. Considering HTL, FL and IIL and fixing the cycle maximum temperature, Ge [84] used the VSH model established in [87,96,[238][239][240][241][242][243][244][245][246][247][248][249], studied the optimum EF performance of an irreversible Miller cycle, and analyzed the influences of the three losses and VSH on cycle EF performance.…”

Section: The Progress In Optimum Performance Studies For As Miller Cymentioning

confidence: 99%

Progress in Finite Time Thermodynamic Studies for Internal Combustion Engine Cycles

Chen

Sun

2016

Entropy

138

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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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Efficiency of a Miller engine

Cited by 90 publications

References 23 publications

Power Optimization of a Miller Thermal Cycle with respect to Residual Gases and Equivalence Ratio

Power Optimization of a Miller Thermal Cycle with respect to Residual Gases and Equivalence Ratio

Performance Study for Miller Cycle Natural Gas Engine Based on GT-Power

Progress in Finite Time Thermodynamic Studies for Internal Combustion Engine Cycles

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