An exergy analysis methodology for internal combustion engines using a multi-zone simulation of dual fuel low temperature combustion

Mahabadipour, Hamidreza; Srinivasan, Koottalai; Krishnan, Sundar Rajan

doi:10.1016/j.apenergy.2019.113952

Cited by 34 publications

(13 citation statements)

References 32 publications

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“…The exergetic analysis is being more explored to support the development of new engine technologies. Mahabadipour et al (2019) performed exergetic analysis inside a turbocharged diesel-methane dual fuel engine combustion chamber which resulted about 41 to 42 percent of the total input exergy destroyed due to thermodynamic irreversibilities. Ruffino et al (2019) performed comparative exergetic analysis of gasoline and ethanol blends from combustion heat release inside combustion chamber concluding the exhaust gases are the higher exergy losses and ethanol combustion results less irreversibility than gasoline.…”

Section: Introductionmentioning

confidence: 99%

Exergetic Analysis of an Internal Combustion Engine Running on E22 and E100

Rovai

Mady

2022

RETERM

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The internal combustion engine performance enhancement is a widely explored subject. Additionally, to pollutant emissions attention, reducing fuel consumption and consequently the greenhouse gas emissions is one of the leading research and development drivers for the future of the engines industry. As the technologies to increase global engine efficiency are becoming less promising (already reaching improvement limits), the next round would be developing technologies capable of recovering the energy rejected to the environment, especially by cooling and exhaust systems. The internal combustion engine efficiency is mainly assessed by its global efficiency, which consists of an energy balance. The exergy analysis enhances the classic energy analysis from the concept of maximum possible work, including the rejected energy, consisting of a handy tool for the feasibility study of energy recovery systems. This article presents and contrasts the energy and the exergy analyses of a flex-fuel internal combustion engine running on its top global efficiency condition. The boundary fuels are hydrous ethanol (E100) and gasoline blend (E22), available fuels in Brazil. The hydrous ethanol fuel properties (octane number, air-fuel ratio, and vaporization enthalpy) theoretically result in higher energetic engine efficiency than E22 in the same engine hardware, with a fixed compression ratio. Preliminary results of this study point 4,5% higher global engine efficiency running on E100 compared to E22. The higher engine energy efficiency running on E100 than E22 does not happen in the Second Law analysis. The classic exergetic efficiency, based on engine brake power, is similar for E22 and E100. The maximum exergetic efficiency, based on destroyed exergy, is 4,1% higher for E22 compared to E100. The estimation and comparison of the exergy rejected to the cooling and the exhaust systems according to the boundary fuel (about 21 kW on average in this case), is fundamental to assess the potential and the availability of any recovery system eventually implemented in the internal combustion engine.

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Section: Introductionmentioning

confidence: 99%

Exergetic Analysis of an Internal Combustion Engine Running on E22 and E100

Rovai

Mady

2022

RETERM

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“…9.11a. This multi-zone methodology (Mahabadipour et al 2019) validated the in-cylinder pressure, as shown in Fig. 9.11b.…”

Section: Laser-induced Engine Characteristicsmentioning

confidence: 73%

Fundamentals, Evolution, and Modeling of Ignition Systems for Spark Ignition Engines

Kumar

Ágarwal

2021

Energy, Environment, and Sustainability

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The advancement of technologies has led researchers to explore new ways to comply with stringent emission norms globally and fulfil the energy requirements. The trends in engine development favour computational studies for initial investigations due to lesser time demand and economy. In a spark ignition (SI) engine, ignition of the fuel-air mixture is achieved by the spark discharge across the spark plug electrodes. The discharge is of very high intensity for a very short interval, providing sufficient energy in the form of plasma kernel to initiate chemical reactions necessary to generate a self-sustaining flame. Direct injection SI combustion system is considered an upcoming next-generation technology capable of meeting stringent emission norms with improved engine performance. Conventional spark plug system undergoes various issues such as erosion of spark plug, heat losses at the electrodes, hindrance in working at high in-cylinder pressures, and fixed spark location. Therefore, the researchers explore alternate ignition concepts/ systems that provide greater flexibility than conventional ignition systems. These alternate ignition concepts/ systems include laser ignition, turbulent jet ignition, corona ignition, and microwave ignition. These all are also referred to as advanced ignition systems. Advanced ignition has emerged as an alternative way to ignite leaner fuel-air mixture owing to higher engine performance and lower emissions. These systems offer significant advantages; however, they are still under research, and many challenges need to be overcome before they are commercialized. In this chapter, the evolution of the spark ignition systems has been discussed. Modelling aspects of spark ignition engines using 1D and 3D simulation tools have been summarised. The working of these advanced ignition systems has been discussed in detail, and their challenges are also summarised.

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“…Exergy is regarded as the maximum useful work that can be utilized during the energy conversion process [30], and the exergy analysis can provide extra information as compared to the energy analysis [31].…”

Section: Exergy Analysismentioning

confidence: 99%

Thermodynamic and Economic Analyses of a New Waste-to-Energy System Incorporated with a Biomass-Fired Power Plant

Pan

Zhang

et al. 2020

Energies

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A novel design has been developed to improve the waste-to-energy process through the integration with a biomass-fired power plant. In the proposed scheme, the superheated steam generated by the waste-to-energy boiler is fed into the low-pressure turbine of the biomass power section for power production. Besides, the feedwater from the biomass power section is utilized to warm the combustion air of the waste-to-energy boiler, and the feedwater of the waste-to-energy boiler is offered by the biomass power section. Based on a 35-MW biomass-fired power plant and a 500-t/d waste-to-energy plant, the integrated design was thermodynamically and economically assessed. The results indicate that the net power generated from waste can be enhanced by 0.66 MW due to the proposed solution, and the waste-to-electricity efficiency increases from 20.49% to 22.12%. Moreover, the net present value of the waste-to-energy section is raised by 5.02 million USD, and the dynamic payback period is cut down by 2.81 years. Energy and exergy analyses were conducted to reveal the inherent mechanism of performance enhancement. Besides, a sensitivity investigation was undertaken to examine the performance of the new design under various conditions. The insights gained from this study may be of assistance to the advancement of waste-to-energy technology.

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An exergy analysis methodology for internal combustion engines using a multi-zone simulation of dual fuel low temperature combustion

Cited by 34 publications

References 32 publications

Exergetic Analysis of an Internal Combustion Engine Running on E22 and E100

Exergetic Analysis of an Internal Combustion Engine Running on E22 and E100

Fundamentals, Evolution, and Modeling of Ignition Systems for Spark Ignition Engines

Thermodynamic and Economic Analyses of a New Waste-to-Energy System Incorporated with a Biomass-Fired Power Plant

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