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An Experimental Assessment of Performance and Exhaust Emission Characteristics by addition of Hydroxy (HHO) gas in Twin cylinder C.I. Engine

Dweepson, S. Chinnasamy Subramanian, J. Ashok kumar, S. Sakthivel

The purpose of this research work is to study the effectiveness of hydroxy (HHO) gas as an additive to a conventional four stroke, twin cylinder, direct injection (DI) compression ignition (CI) engine without any modification and need of a storage tank. Here HHO gas was produced by the electrolysis process of three different electrolytes such as (KOH(aq), NaOH(aq), K2CO3(aq)) with the electrode material built up of mixed metal oxide (MMO) coated titanium plates in a dry cell type HHO gas kit. In this experimental investigation, the HHO gas produced at a steady flow rate of 0.45 lpm was mixed with the inlet air after the air filter at the inlet manifold. The performance and exhaust emission tests were conducted at a constant engine speed of 1500 rpm, resulting into increase in brake thermal efficiency (η B.T.) and volumetric efficiency (η Vol.), whereas there is a drop in the brake specific fuel consumption (BSFC), indicated mean effective pressure (IMEP) of the diesel engine. There was also some decline in the curves of carbon monoxide (CO), unburned hydrocarbon (UBHC) and nitrogen monoxide (NO) emissions. When comparing among these three different electrolytes which were added into the water to diminish hydrogen and oxygen bonds, to form HHO gas, KOH(aq) was specified as the most appropriate electrolyte, as it gave better performance and emission results.