Experimental study of dual fuel engine performance using variable LPG composition and engine parameters

•The effect of using variable LPG is studied.•Five fuels with propane to butane % volume ratio are: 100-70-55-25-0.•100% Propane composition shows the highest noise levels with similar performance.•At 45° BTDC injection timing 55% Propane LPG the only fuel experience knocking.•LPG fuels gave similar...

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Bibliographic Details
Published in:Energy conversion and management 2013-12, Vol.76, p.32-42
Main Authors: Elnajjar, Emad, Selim, Mohamed Y.E., Hamdan, Mohammad O.
Format: Article
Language:English
Subjects:
Applied sciences
Blends
Combustion
Composition effects
Cylinders
Dual fuel engine
Energy
Engine performance
Engines
Exact sciences and technology
Fuels
LPG
LPG composition
Pilots
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Summary:•The effect of using variable LPG is studied.•Five fuels with propane to butane % volume ratio are: 100-70-55-25-0.•100% Propane composition shows the highest noise levels with similar performance.•At 45° BTDC injection timing 55% Propane LPG the only fuel experience knocking.•LPG fuels gave similar engine performance, with differences in levels of noise. The present work investigates experimentally the effect of LPG fuel with different composition and engine parameters on the performance of a dual compression engine. Five different blends of LPG fuels are used with Propane to Butane volume ratio of 100:0, 70:30, 55:45, 25:75, and 0:100. A single cylinder, naturally aspirated, four strokes, indirectly injected, water cooled modified Ricardo E6 engine, is used in this study. The study is carried out by measuring the cylinder pressure, engine load, engine speed, crank angle, and the fuel’s flow rate. The engine performance under variable LPG fuel composition, engine load, pilot fuel injection timing, compression ratio, pilot fuel mass and engine speed, are estimated by comparing the following engine parameters: the cylinder maximum pressure, the indicated mean effective pressure, the maximum rate of pressure rise, and the thermal efficiency. The experimental data indicates that the engine parameters are playing a major role on the engine’s performance. Different LPG fuel composition did not show a major effect on the engine efficiency but directly impacted the levels of generated combustion noise.
ISSN:0196-8904
1879-2227
DOI:10.1016/j.enconman.2013.06.050