Experimental investigation on effect of dehumidified inlet air on the performance and emission of C.I. engine

Abstract

Ambient conditions depend on the geographical location and may vary with time of the year. Engine controls
may compensate for some effects of these variations, but engine performance deviations are to be expected. Humidity is
important parameter affecting on engine performance. During summer it’s effect become significant, Generally higher
humidity lowers combustion rates and decrease peak temperature and pressure that is why car’s performance is much
better in winter than summer. Although humidity effects on engine performance, it effect becomes significantly lower with
increase combustion temperature This works investigates the performance of single cylinder air cooled diesel engine
with dehumidifier in inlet manifold to compensate inlet air humidity near target value during summer. Dry air increase
peak temperature during combustion hence increase chances of complete combustion and reduce HC and CO in exhaust
also increase peak pressure meanwhile it increase NOx in exhaust.