On the applicability of empirical heat transfer models for hydrogen combustion engines

Demuynck, Joachim; Paepe, Michel De; Huisseune, Henk; Sierens, Roger; Vancoillie, Jeroen; Verhelst, Sebastian

doi:10.1016/j.ijhydene.2010.10.059

Cited by 62 publications

(31 citation statements)

References 25 publications

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“…This is illustrated with Fig. 1 obtained from [13] that compares the measured heat flux trace with the predicted heat flux trace for hydrogen. The models are calibrated to correctly predict the peak value of the heat flux in the case of λ=1.5.…”

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confidence: 57%

“…Although these models seem to perform well for tradition fossil fuels, they do not provide accurate results for alternative fuels, e.g. hydrogen [12,13], nor for new combustion types e.g. HCCI (homogeneous charge compression ignition) 60 [14][15][16].…”

mentioning

confidence: 99%

“…In order to construct a heat transfer model that is fuel-independent, new (Woschni and Annand) for hydrogen when varying the equivalence ratio [13] engine measurements need to be executed. Not only the fuel needs to be varied in these measurements to have a range of gas properties, but also the engine parameters need to be varied over a wide range to expand the validity of the 80 model.…”

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confidence: 99%

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Heat transfer in premixed spark ignition engines part I: Identification of the factors influencing heat transfer

Broekaert

Demuynck

Cuyper

et al. 2016

Energy

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The heat transfer from the combustion gases to the cylinder walls inside a spark ignition engine is a key factor in an engine's design, due to its influence on the engine's efficiency, power and emissions. Therefore a lot of research has been conducted in order to accurately model the heat transfer, for engine design and optimization purposes. These models have been found to provide inaccurate predictions for fuels which have significantly different gas properties compared to traditional fossil fuels. This indicates that the models either do not properly include gas properties, or are missing some important properties in their formulation. In order to construct a general ("fuel-independent") heat transfer model, new measurements need to be executed, with multiple fuels that have different properties. Designing such an experiment requires a thorough understanding of the factors influencing the heat transfer and their interactions. In this paper a literature review is presented of heat transfer measurements in spark ignition engines in order to investigate the effect of the engine factors on the heat transfer. Based on this review, a root cause analysis is conducted to identify the independent factors that affect heat transfer. These factors are then used to set up two experiments according to a Design of Experiments methodology that allows the investigation of the effect of different gas properties and engine settings on the heat transfer in a consistent way. The results of these measurements for motored operation are discussed in [1] and for fired operation in a companion paper [2].

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confidence: 57%

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confidence: 99%

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confidence: 99%

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Heat transfer in premixed spark ignition engines part I: Identification of the factors influencing heat transfer

Broekaert

Demuynck

Cuyper

et al. 2016

Energy

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“…Both engines and the employed measurement equipment have been discussed elsewhere [38,39,21]. The main characteristics of the engines are summarized in Table 1.…”

Section: Engine Measurementsmentioning

confidence: 99%

Development and validation of a quasi-dimensional model for methanol and ethanol fueled SI engines

2014

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Methanol and ethanol are promising alternative SI engine fuels. Engine simulation tools could help to unlock the full potential of these fuels. Previous work by the current authors has focused on building submodels to predict the gas dynamics, combustion and knock occurrence in alcohol engines. Here, 10 these building blocks are implemented in a quasi-dimensional engine simulation code, which is subsequently validated against measurements on two engines for various working conditions. The power cycle predictions for varying mixture composition are significantly improved by the introduction of new laminar burning velocity correlations. A comparison of turbulent combustion 15 models indicates that models including thermodiffusive properties perform slightly better than simpler formulations. Finally, a preliminary evaluation of a new knock prediction model for methanol engines confirms useful results can be obtained for quantities relevant to knock. The largest inaccuracies occur for varying equivalence ratios. Including the effects of methanol on 20 evaporation cooling and wall heat transfer might resolve this. The higher heat of vaporization relative to gasoline also required the inclusion of fuel puddling dynamics for a correct prediction of the volumetric efficiency by the breathing cycle model.

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“…Many researchers had investigated the effect of different heat transfer models on SI engine operating with alternative fuels. Demuynck (Demuynck, 2011) had studied the applicability of Annand and Woschni heat transfer models for hydrogen fuel operating with SI engine conditions. They evaluated both models theoretically and experimentally.…”

Section: Introductionmentioning

confidence: 99%

Simulation Of Natural Gas Combustion Process Using Pressure Based Solver

Ghazal

2016

ESJ

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The aim of this research is to simulate the combustion process for methane using different heat transfer models combined with various fuel injection techniques to better understand the combustion process and heat transfer process inside IC engine which reflect on the engine efficiency. The simulation has been carried out using Lotus Engineering software. This model solves the nonlinear momentum and continuity equations to satisfy the conservation of mass and the conservation of momentum laws. In this analysis a single cylinder four stroke SI engine has been simulated. The fuel used in the simulation is methane. Two fuel systems have been investigated port injection and direct injection. The Wiebe heat release curve has been used. Two widely used for SI engines heat transfer models presented in the simulation, Annand and Woschni. The intension in this paper is to study the effect of various fuel systems and heat transfer models on engine efficiency for different engine speeds. Moreover, the evaluation of the heat transfer models for natural gas SI engine will be tested. Brake power, mean effective pressure, specific fuel consumption, brake thermal efficiency, and heat transfer rate were calculated and discussed to show the effect of varying heat transfer models and fuel systems on engine efficiency.

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On the applicability of empirical heat transfer models for hydrogen combustion engines

Cited by 62 publications

References 25 publications

Heat transfer in premixed spark ignition engines part I: Identification of the factors influencing heat transfer

Heat transfer in premixed spark ignition engines part I: Identification of the factors influencing heat transfer

Development and validation of a quasi-dimensional model for methanol and ethanol fueled SI engines

Simulation Of Natural Gas Combustion Process Using Pressure Based Solver

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