Fuel specific consumption and emission analysis in a cycle diesel motor generator using diesel and biodiesel from waste frying oil blends

One of the main fuels that can be helpful in emissions reduction when compared with diesel oil is the biodiesel. Moreover, it is a renewable fuel and may be obtained from different animal fat and vegetable oil. The purpose of this work was to evaluate fuel specific consumption and emission of exhaustion gases using the biodiesel produced from waste frying oil in a cycle diesel internal combustion engine (ICE) to produce electrical energy. The used motor generator has a power of 7.36 kW (10 HP) and 5.5 kVA /5.0 kW of nominal power. The used fuel was composed of a biodiesel and diesel oil blend and the following proportion in biodiesel composition was used: 0% (B0), 5% (B5), 10% (B10), 20% (B20), 50% (B50) and 100% biodiesel (B100). The nominal load applied varied between 0.5 and 5.0 kW. The analysis test was just performed with (B0) and (B100) blends. To quantify the gases emission, combustion and emission analyzer were used. The quantified gases were: CO, NO, NOx and SO2. Generally, the utilization of biodiesel from waste frying oil showed fuel specific consumption statistically similar to that of the diesel oil. It was observed that the biodiesel from waste frying oil provided an emission reduction of combustion gases.Key words: Combustion, energy production, biofuel

Performance of diesel cycle engine-generator operating on dual fuel mode with gasification gas

The Brazilian Federal Government aims to expand the electrical energy supply to the low income Brazilian citizen through Light for Everyone Program. The objective of this study was to use the program as a vector of social and economical development. One of the obstacles was to reach even the isolated communities. In this work, the performance of a cycle diesel motor generator running in dual mode, diesel and gasification gas, as an option for decreases, the dependence on diesel by the isolated communities was evaluated. The process was based on obtaining gas through the partial biomass burn, which in high temperatures is converted to fuel gas that may be used in internal combustion engine. Among the results, it was observed that there is a reduction of 30.7% in the diesel consumption, a better voltage adjustment and a maximum current at the generator, leading to a power increase of 43.8% saving R$ 0.86 for each kW h-1. These results show the possibility of using the biomass gasification to decrease the diesel consumption to produce electricity in the isolated communities.Keywords: Energy, biomass, diesel consumption reduction, gasifierAfrican Journal of Biotechnology Vol. 12(10), pp. 1148-115