Influence of Water Ingestion into Inlet Manifold on the Performance and Emissions of DI CI Engines Utilising Waste Cooking Oil
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Abstract
This work involves how the introduction of water into a basic carburettor affects the performance and emission attributes of a four-stroke single-cylinder constant-speed Direct Injection Compression Ignition engine (DI CI) engine that runs on waste cooking oil (WCO). Experiments were carried out on the engine while it was running at a velocity of 1500 rpm, varying the water ingestion in mass percentage of 10% (W10), 20% (W20) and 30% (W30). The findings demonstrated a 60% reduction in NOx and a 22% decrease in smoke emissions when employing a W30 biodiesel when compared to using neat WCO. This reduction is attributed to the impact of water spray on the heat release and in-cylinder pressure. Despite a minor decline in thermal efficiency, the introduction of water led to an increase in unburnt HC and CO emissions.
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