Abstract
The present study is to investigate the influence of used cooking oil (UCO) bio diesel blend and HHO gas on combustion, performance and emission characteristics of a variable compression ratio multi fuel engine. Bio fuel is extracted from UCO through transesterification process. Blends of diesel and UCO bio fuel is used as primary fuel and hydroxyl (HHO) gas which was generated from the electrolysis of water is used as supplementary fuel. Engine was tested for three different fuels such as diesel, B20 blend and B20 +HHO blends by varying four different loads (25%, 50%, 75%, and 100%) at the constant speed of 1500 rpm. HHO gas was injected in to the intake manifold with constant flow rate of 0.5 lpm for all engine loads. Engine fuelled with B20+HHO blends showed better brake thermal efficiency and lower brake specific fuel consumption and emitted less CO and HC emissions over the B20 blends and diesel.
Highlights
In today’s world, alternative energy sources are receiving more attention bio fuels which are extracted from plant oils in order to meet the increasing energy demand
It can be noted that Brake thermal efficiency (BTE) of the engine operated with B20+HHO blends increased by 7% compared to diesel and 12.66% compared to B20 blend
The engine operated with B20+HHO blend yields lower HC emission compared to diesel and B20 blends
Summary
In today’s world, alternative energy sources are receiving more attention bio fuels which are extracted from plant oils in order to meet the increasing energy demand. Laurencas Raslavicius et al [12] investigated the performance and emission characteristics of CI engine fuelled with P. moriformis oil and its blends with diesel fuel They assessed the parameters such as variation of in-cylinder pressure, in-cylinder pressure rise rate, in-cylinder temperature, mass fraction burnt, in-cylinder temperature rise rate and in-cylinder heat release rate with respect to thermochemical processes during combustion. The novelty of this work is to study the combustion, performance and emission characteristics of the CI engine operated with blends of HHO gas and bio diesel which is extracted from the used cooking oil (UCO) i.e., from the mixture of castor oil, coconut oil, palm oil, rice bran oil, canola oil, corn oil, soybean oil, sun flower oil, peanut oil, sesame oil and flax seed oil
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