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Effects of combustion products composition models on the exergetic analysis of spark-ignition engine fuelled with ethanol

Treść / Zawartość
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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The engine simulations have become an integral part of engine design and development. They are based on approximations and assumptions. The precision of the results depends on the accuracy of these hypotheses. The simplified models of frozen composition, chemical equilibrium and chemical kinetics provide the compositions of combustion products for engine cycle simulations. This paper evaluates the effects of different operating conditions and hypotheses on the exergetic analysis of a spark-ignition engine. The Brazilian automotive market has the highest number of flex-fuel vehicles. Therefore, a flex-fuel engine is considered for simulations in order to demonstrate the effects of these different hypotheses. The stroke length and bore diameter have the same value of 80 mm. The in-cylinder irreversibility is calculated for each case at the closed part of the engine cycle. A comparative analysis of these hypotheses provides a comprehensive evaluation of their effects on exergetic analysis. Higher values of accumulated irreversibility are observed for the oversimplified hypothesis.
Rocznik
Strony
27--42
Opis fizyczny
Bibliogr. 13 poz., rys., tab.
Twórcy
  • Universidade Estadual de Campinas Cidade Universitária Zeferino Vaz, 13083-970 Campinas, Brazil
  • Universidade Estadual de Campinas Cidade Universitária Zeferino Vaz, 13083-970 Campinas, Brazil
  • Universidade Estadual de Campinas Cidade Universitária Zeferino Vaz, 13083-970 Campinas, Brazil
  • Universidade Estadual de Campinas Cidade Universitária Zeferino Vaz, 13083-970 Campinas, Brazil
  • Universidade Estadual de Campinas Cidade Universitária Zeferino Vaz, 13083-970 Campinas, Brazil
Bibliografia
  • [1] Caton J.A.: On the destruction of availability (exergy) due to combustion processeswith specific application to internal-combustion engines. Energy 25(2000), 11, 1097–1117.
  • [2] Dunbar W.R., Lior N.: A breakdown of the exergy losses in combustion. In: Proc. Florence World Energy Research Symp., 1990.
  • [3] Dunbar W.R., Lior N.: Understanding combustion irreversibility, second law analysis-industrial and environmental applications. ASME AES 25(1991), 81–90.
  • [4] Dunbar W.R., Lior N.: Sources of combustion irreversibility. Combust. Sci. Technol. 103(2007), 1-6, 41–61.
  • [5] Heywood J.B.: Internal Combustion Engine Fundamentals (1st Edn.). McGrawHill, 1988.
  • [6] Hohenberg G.F.: Advanced approaches for heat transfer calculations. SAE Tech. Pap. 790825, 1979.
  • [7] Kotas T.J.: The Exergy Method of Thermal Plant Analysis (2nd Edn.). Elsevier, 2013.
  • [8] Lima A.J.T.B., Gallo W.L.R.: Comparison between chemical kinetics and chemical equilibrium approaches for NO and CO formations on spark ignition engine conditions. In: Proc. 24th ABCM Int. Cong. Mechanical Engineering, Dec. 2017.
  • [9] Lima A.J.T.B., Gallo W.L.R.: Chemical kinetics analysis of NO and CO formation based on thermodynamic data from an ethanol-fueled engine computational model. In: Proc. XXV Simpsio Internacional de Engenharia Automotiva, Sept. 2017.
  • [10] Pulkrabek W.W.: Engineering Fundamentals of the Internal Combustion Engine (1st Edn.). Prentice Hall, 1997.
  • [11] Szargut J.: International progress in second law analysis. Energy 5(1980), 8-9, 709–718.
  • [12] Turns S.R.: An Introduction to Combustion – Concepts and Applications (2nd Edn.). McGraw-Hill, 2000.
  • [13] Way R.J.B.: Methods for determination of composition and thermodynamic properties of combustion products for internal combustion engine calculations. Proc. Inst. Mech. Eng. 190(1976), 1, 687–697.
Uwagi
EN
The authors would like to express their gratitude to the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) for the financial support through the processes Nrs. 2013/50238-3, 2016/06043-1, 2017/21733-7, 2013/50238-3 and 2015/20801-3 and to PSA Citroën-Peugeot Group for the technical and financial support.
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-2d51d191-a1cc-4dc8-a862-20a8c36ab2ce
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