Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Author(s):
Rufino, Caio H. [1] ; de Lima, Alessandro J. T. B. [1] ; Mattos, Ana P. [1] ; Allah, Fazal U. M. [1] ; Ferreir, Janito V. [1] ; Gallo, Waldyr L. R. [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Campinas, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: ARCHIVES OF THERMODYNAMICS; v. 40, n. 3, p. 27-42, 2019.
Web of Science Citations: 0
Abstract

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. (AU)

FAPESP's process: 13/50238-3 - Conceptual study of an advanced ethanol-fueled engine
Grantee:Francisco Emílio Baccaro Nigro
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Research Centers in Engineering Program
FAPESP's process: 15/20801-3 - Study of the operation of the internal combustion engine fueled by ethanol with addition of water to the combustion chamber
Grantee:Jair Leopoldo Loaiza Bernal
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 16/06043-1 - Conceptual study of an internal combustion engine with adjustable cubic capacity and compression ratio
Grantee:Caio Henrique Rufino
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)