Energy integration on multi‐periods for vehicle thermal powertrains

Dimitrova, Zlatina; Maréchal, François

doi:10.1002/cjce.22588

Cited by 7 publications

(3 citation statements)

References 26 publications

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“…Ex exhaust,ph , also called thermo-mechanical exergy, which is associated with the exhaust gases pressure, P exhaust , and temperature, T exhaust -which is much higher compared to that of atmospheric temperature (T 0 ) [55]-is defined as:…”

Section: Exergy Losses At the Exhaust Gasmentioning

confidence: 99%

The Exergy Losses Analysis in Adiabatic Combustion Systems including the Exhaust Gas Exergy

Agrebi

Dreßler

Nishad

2022

Entropy

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The entropy generation analysis of adiabatic combustion systems was performed to quantify the exergy losses which are mainly the exergy destroyed during combustion inside the chamber and in the exhaust gases. The purpose of the present work was therefore: (a) to extend the exergy destruction analysis by including the exhaust gas exergy while applying the hybrid filtered Eulerian stochastic field (ESF) method coupled with the FGM chemistry tabulation strategy; (b) to introduce a novel method for evaluating the exergy content of exhaust gases; and (c) to highlight a link between exhaust gas exergy and combustion emissions. In this work, the adiabatic Sandia flames E and F were chosen as application combustion systems. First, the numerical results of the flow and scalar fields were validated by comparison with the experimental data. The under-utilization of eight stochastic fields (SFs), the flow field results and the associated scalar fields for the flame E show excellent agreement contrary to flame F. Then, the different exergy losses were calculated and analyzed. The heat transfer and chemical reaction are the main factors responsible for the exergy destruction during combustion. The chemical exergy of the exhaust gases shows a strong relation between the exergy losses and combustion emission as well as the gas exhaust temperature.

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Section: Exergy Losses At the Exhaust Gasmentioning

confidence: 99%

The Exergy Losses Analysis in Adiabatic Combustion Systems including the Exhaust Gas Exergy

Agrebi

Dreßler

Nishad

2022

Entropy

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“…The physical exhaust exergy

, known also as the thermo-mechanical exergy, is expressed as a function of the exhaust gases pressure,

, and temperature,

, which is much higher than that of atmospheric temperature (

) [ 51 ] is given by [ 49 , 50 ]:

where

is the heat energy taken by exhaust gases and defined as a function of the mass flow rate, specific heat and temperature of the exhaust gases as:

…”

Section: Experimental Investigations and 1d Calculations Of Exergy An...mentioning

confidence: 99%

Entropy Generation Analysis in Turbulent Reacting Flows and Near Wall: A Review

Sadiki

Agrebi

Ries

2022

Entropy

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This paper provides a review of different contributions dedicated thus far to entropy generation analysis (EGA) in turbulent combustion systems. We account for various parametric studies that include wall boundedness, flow operating conditions, combustion regimes, fuels/alternative fuels and application geometries. Special attention is paid to experimental and numerical modeling works along with selected applications. First, the difficulties of performing comprehensive experiments that may support the understanding of entropy generation phenomena are outlined. Together with practical applications, the lumped approach to calculate the total entropy generation rate is presented. Apart from direct numerical simulation, numerical modeling approaches are described within the continuum formulation in the framework of non-equilibrium thermodynamics. Considering the entropy transport equations in both Reynolds-averaged Navier–Stokes and large eddy simulation modeling, different modeling degrees of the entropy production terms are presented and discussed. Finally, exemplary investigations and validation cases going from generic or/and canonical configurations to practical configurations, such as internal combustion engines, gas turbines and power plants, are reported. Thereby, the areas for future research in the development of EGA for enabling efficient combustion systems are highlighted. Since EGA is known as a promising tool for optimization of combustion systems, this aspect is highlighted in this work.

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“…The temperature of engine exhaust normally range from 350 to 700 • C (Dimitrova and Maréchal, 2017;Kanchibhotla and Bari, 2018). Further, the heat of cooling system can also be recovered as around 95 • C (Abdelghaffar et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Carbon Dioxide Capture From Internal Combustion Engine Exhaust Using Temperature Swing Adsorption

Sharma

Maréchal

2019

Front. Energy Res.

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In order to reduce the CO 2 emissions in the transportation sector, one can electrify the vehicle, switch to biofuel, or capture and store CO 2 on board. In this study, integration of an on board CO 2 capture and storage unit with an internal combustion engine has been proposed. The technology can be applied for various internal combustion or Stirling engines with targeted applications in the transportation sector. Truck transport for goods delivery is used as an example for on board CO 2 capture and storage system design. The investigated system integrates a temperature swing adsorption system for CO 2 capture with a turbo-compressor system to compress and liquefy the captured CO 2 using the waste heat of the exhaust gases of the engine. Energy and exergy analyses of the proposed CO 2 captured system are studied in details. The CO 2 capture system for engine exhaust stream (car, truck, bus, ship, or train) can capture 90% of the emitted CO 2 , without any energy penalty. This system can be integrated into overall mobility system (fuel-engine-CO 2-fuel), where captured CO 2 can be recycled as conventional liquid or gaseous fuels produced from renewable energy sources.

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Energy integration on multi‐periods for vehicle thermal powertrains

Cited by 7 publications

References 26 publications

The Exergy Losses Analysis in Adiabatic Combustion Systems including the Exhaust Gas Exergy

The Exergy Losses Analysis in Adiabatic Combustion Systems including the Exhaust Gas Exergy

Entropy Generation Analysis in Turbulent Reacting Flows and Near Wall: A Review

Carbon Dioxide Capture From Internal Combustion Engine Exhaust Using Temperature Swing Adsorption

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