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The paper presents some results of examination of DF CI engine fuelled with kerosene-based fuel (Jet A-1) and propane. The aim was to obtain the maximum engine thermal and overall efficiency and checking the engine emissions for the application of significant share of propane as a main source of energy. The fuel which initiates the ignition was Jet A-1 provided by common rail system during the beginning of compression stroke. Propane was provided to inlet manifold in a gas phase. The method of providing of both fuels to the engine cylinder allowed to create nearly homogeneous mixture and realized HCCI process for dual fuelling with Jet A-1 and propane. It was possible to compare two combustion strategies PCCI and HCCI for fuelling of CI engine with single fuel (Jet A-1) and dual fuelling with Jet A-1 and propane. The results of experiment show that the NOx and soot emissions are much lower than for standard CI or SI engines. The results also show very interesting potential role of propane in control of HCCI dual fuel combustion process which gives the new perspective of dual fuel engine development. The low levels of toxic components in exhaust gases encourage to test and develop this type of fuelling which could radically confine the negative influence on the environment as well as enable to apply an alternative fuels.
This research is the first step of a complex research program that has the goal to retrofit the lignite burners of a 2×315 MWe units of a thermal power plant, in order to reduce NOx emission by staggered under-stoichiometric combustion. The straight-flow pulverized-coal burner will be built-on from a set of 16 modules. The experiments were made in a wind tunnel on a single module that was converted for the staggered combustion. The experimental data were compared to those resulted from the numerical modeling flow processes for the jets interaction, in order to achieve the desired aerodynamic.
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