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Thermodynamic modeling of ethanol fumigation in a diesel engine

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conference contribution
posted on 2013-12-06, 00:00 authored by R Situ, G Ireland, Tim Bodisco, R Brown
Due to rapidly diminishing international supplies of fossil fuels, such as petroleum and diesel, the cost of fuel is constantly increasing, leading to higher costs of living, as a result of the significant reliance of many industries on motor vehicles. Many technologies have been developed to replace part or all of a fossil fuel with bio-fuels. One of the dual fuel technologies is fumigation of ethanol in diesel engines, which injects ethanol into the intake air stream of the engine. The advantage of this is that it avoids any costly modification of the engine high pressure diesel injection system, while reducing the volume of diesel required and potentially increasing the power output and efficiency.

This paper investigates the performance of a diesel engine, converted to implement ethanol fumigation. The project will use both existing experimental data, along with generating computer modeled results using the program AVL Boost. The data from both experiments and the numerical simulation indicate desirable results for the peak pressure and the indicated mean effective pressure (IMEP).

Increase in ethanol substitution resulted in elevated combustion pressure and an increase in the IMEP, while the variation of ethanol injection location resulted in negligible change. These increases in cylinder pressure led to a higher work output and total efficiency in the engine as the ethanol substitution was increased. In comparing the numerical and experimental results, the simulation showed a slight elevation, due to the inaccuracies in the heat release models. Future work is required to improve the combustion model and investigate the effect of the variation of the location of ethanol injection.

History

Event

Modelling and Simulation. Conference (20th : 2013 : Adelaide, Australia)

Pagination

1568 - 1574

Publisher

Modelling and Simulation Society of Australia and New Zealand

Location

Adelaide, Australia

Place of publication

[Canberra, A.C.T.]

Start date

2013-12-01

End date

2013-12-06

Language

English

Publication classification

E Conference publication; E1.1 Full written paper - refereed

Copyright notice

2013, The Modelling and Simulation Society of Australia and New Zealand Inc.

Editor/Contributor(s)

[Unknown]

Title of proceedings

MODSIM 2013 : Proceedings of the Modelling and Simulation 2013 Conference