Improvement and application of a methodology to perform the Global Energy Balance in internal combustion engines. Part 1: Global Energy Balance tool development and calibration

Payri, F.; López, J. Javier; Martín, Javier Rodríguez; Carreño, Ricardo

doi:10.1016/j.energy.2018.03.118

Cited by 14 publications

(10 citation statements)

References 47 publications

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“…Different paths followed by energy terms and energy distribution are represented in Figure 4, where all the energy transformations taking place in a diesel engine are taken into account. 7,8,20,28…”

Section: Geb Descriptionmentioning

confidence: 99%

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Analysis of the energy balance during World harmonized Light vehicles Test Cycle in warmed and cold conditions using a Virtual Engine

Olmeda

Martín

Arnau

et al. 2019

International Journal of Engine Research

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In recent years, the interests on transient operation and real driving emissions have increased because of the global concern about environmental pollution that has led to new emissions regulation and new standard testing cycles. In this framework, it is mandatory to focus the engines research on the transient operation, where a Virtual Engine has been used to perform the global energy balance of a 1.6-L diesel engine during a World harmonized Light vehicles Test Cycle. Thus, the energy repartition of the chemical energy has been described with warmed engine and cold start conditions, analyzing in detail the mechanisms affecting the engine consumption. The first analysis focuses on the “delay” effect affecting the instantaneous energy balance due to the time lag between the in-cylinder processes and pipes: as a main conclusion, it is obtained that it leads to an apparent unbalance than can reach more than 10% of the cumulated fuel energy at the beginning of the cycle, becoming later negligible. Energy split analysis in cold starting World harmonized Light vehicles Test Cycle shows that in this condition the energy accumulation in the block is a key term at the beginning (about 50%) that diminishes its weight until about 10% at the end of the cycle. In warmed conditions, energy accumulation is negligible, but the heat transfer to coolant and oil are higher than in cold starting conditions (21% vs 28%). The lower values of the mean brake efficiency at the beginning of the World harmonized Light vehicles Test Cycle (only about 20%) is affected, especially in cold starting, by the higher mechanical losses due to the higher oil viscosity and the heat rejection from the gases. The friction plays an important role only during the first half of the cycle, with a percentage of about 65% of the total mechanical losses and 10% of the total fuel energy at the end of the World harmonized Light vehicles Test Cycle. However, at the end of the cycle, it does not affect dramatically the mean brake efficiency which is about 31% both in cold starting and warmed World harmonized Light vehicles Test Cycle.

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Section: Geb Descriptionmentioning

confidence: 99%

“…An example of a through and integral analysis of the energy balance combining experimental and simulated information was provided in a previous work. 20…”

Section: Introductionmentioning

confidence: 99%

Analysis of the energy balance during World harmonized Light vehicles Test Cycle in warmed and cold conditions using a Virtual Engine

Olmeda

Martín

Arnau

et al. 2019

International Journal of Engine Research

Self Cite

View full text Add to dashboard Cite

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“…Different paths followed by energy terms are represented in Figure 4, where all the energy transformations taking place in a turbocharged engine are considered. 38,39,49,52,56…”

Section: Global Energy Balance (Geb)mentioning

confidence: 99%

“…43,47,48 Also the combination of experiments and theoretical analysis provides a deep insight in the key issues controlling the energy degradation in the engine as shown in two previous works. 43,47–49…”

Section: Introductionmentioning

confidence: 99%

Analysis of temperature and altitude effects on the Global Energy Balance during WLTC

Payri

Martín

Arnau

et al. 2021

International Journal of Engine Research

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In this work, the Global Energy Balance (GEB) of a 1.6 L compression ignition engine is analyzed during WLTC using a combination of experimental measurements and simulations, by means of a Virtual Engine. The energy split considers all the relevant energy terms at two starting temperatures (20°C and 7°C) and two altitudes (0 and 1000 m). It is shown that reducing ambient temperature from 20°C to −7°C decreases brake efficiency by 1% and increases fuel consumption by 4%, mainly because of the higher friction due to the higher oil viscosity, while the effect of increasing altitude 1000 m decreases brake efficiency by 0.8% and increases fuel consumption by 2.5% in the WLTC mainly due to the change in pumping. In addition, GEB shows that ambient temperature is affecting exhaust enthalpy by 4.5%, heat rejection to coolant by 2%, and heat accumulated in the block by 2.5%, while altitude does not show any remarkable variations other than pumping and break power.

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“…Because of its high thermal efficiency, high power per unit weight and volume, and strong mobility, it is widely used in automobiles, engineering equipment, agricultural machinery, ship transportation, and other fields. The international automobile and internal combustion engine industry generally believes that in the foreseeable future, the internal combustion engine will still be the main motive among these power sources [1]. However, the internal combustion engine and automobile industry not only promotes the rapid development of the global economy and the continuous progress of human society, but also worsens the global problem of energy crisis and environmental pollution [2,3].…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Injection Strategies on Combustion and Emission Characteristics of Diesel Engine Fueled with Dual Fuel

et al. 2021

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In this work, an effective numerical simulation method was developed and used to analyze the effects of natural gas mixing ratio and pilot-main injection, main-post injection, and pilot-main-post injection strategies on the combustion and emission characteristics of diesel engine fueled with dual fuel. Firstly, the one-dimensional calculation model and three-dimensional CFD model of the engine were established by AVL-BOOST and AVL-Fire, respectively. In addition, the simplified chemical kinetics mechanism was adopted, which could accurately calculate the combustion and emission characteristics of the engine. The results show that the cylinder pressure and heat release rate decrease with the increase of the natural gas mixing ratio and the NOx emission is reduced. When the NG mixing ratio is 50%, the NOx and CO emission are reduced by 47% and 45%, respectively. When the SODI3 is 24 °CA ATDC, the NOx emission is reduced by 29.6%. In addition, with suitable pilot-main injection and pilot-main-post injection strategies, the combustion in the cylinder can be improved and the trade-off relationship between NOx and soot can be relaxed. Thus, the proper main-post injection strategy can improve the combustion and emission characteristics, especially the reduction in the NOx and CO emissions.

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Improvement and application of a methodology to perform the Global Energy Balance in internal combustion engines. Part 1: Global Energy Balance tool development and calibration

Cited by 14 publications

References 47 publications

Analysis of the energy balance during World harmonized Light vehicles Test Cycle in warmed and cold conditions using a Virtual Engine

Analysis of the energy balance during World harmonized Light vehicles Test Cycle in warmed and cold conditions using a Virtual Engine

Analysis of temperature and altitude effects on the Global Energy Balance during WLTC

Effects of Different Injection Strategies on Combustion and Emission Characteristics of Diesel Engine Fueled with Dual Fuel

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