Effect of addition of fuel additive in diesel with hydrogen on combustion duration

Abstract

Hugh energy demand in all countries caused expeditious depletion of conventional resources of energy. The adverse effect of unregulated utilization of conventional energy sources resulted into lack of stock left and the emission of harmful pollutants into the environment. There is a need for optimized utilization of these resources and to develop new alternative sources of energy to conserve them for future generation. Dual fuel technology is a prominent method to execute for efficient combustion and healthy emission compared with conventional ones. The use of fuel additives in diesel could significantly enhance the fuel properties, promote combustion and reduce harmful emissions. Hydrogen, on the other side, is a clean and carbon free source of energy. Due to its high energy share and availability, it can be utilized in dual fuel engine for optimized emissions and performance. In the present study, tri-ethylene glycol mono methyl ether (TEGMME) as a liquid fuel additive in diesel has been utilized along with hydrogen in dual fuel approach. A four stroke, single cylinder, compression ignition diesel engine was modified to operate in dual fuel mode for the experiments. A fixed speed of the engine was maintained at 1500 rpm was maintained while the compression ratio was fixed to 18. After the experimental trials for the load range of 2–70 %, the results data were analyzed. The effects of the addition of fuel additive and hydrogen on combustion duration were studied. With the substitution of TEGMME in diesel, decrement in combustion duration was observed up to 30 % of load, while combustion duration was increased with increase in load. Hydrogen substitution resulted into increment in combustion duration with increase in load, while with the increment in H2 substitution, reduction in combustion duration at each load was observed. The combined effect of substitution of TEGMME in diesel along with hydrogen was observed for the entire load range. In these cases, minor increment in combustion duration was found at low load, while at high load it was incremented considerably.