Experimental Investigation on the Dual Fuel Combustion in a VCR CI Engine using Biodiesel n butanol and DEE Blends

Abstract

Growing interest in energy sustainability and strategies to reduce air pollution has newlinerefocused research on using renewable energy. In this respect, an innovative idea for newlinedual fuel combustion and PPCI (partially premixed compression ignition) has been newlinetaken into consideration, which encourages extremely effective combustion and newlineproduces minimal pollutants in CI engines. The PPCI reduces pollutants like NOX and newlinePM. The influence of using oxygen- enriched fuel blends, ignition enhancers, and newlineoperating conditions to implement PPCI is also examined in this study. newlineThe performance, pollutants, and combustion characteristics of a variable newlinecompression ratio (VCR) CI engine operating on n-butanol blends at three newlinecompression ratios of 16, 18, and 20 were assessed using the early stage analysis. In newlinethis investigation, the test engine ran at a base rpm of 1500 with fuel injection newlinepressure of 300 bar. On a volumetric basis, 10% (NB10) and 20% (NB20) of nbutanol newlinewere combined with diesel to create the test fuel blend. When contrasted with newlinepure diesel, the trial findings for both blends showed enhanced brake thermal newlineefficiency (BTE) and lower smoke. Reduced CO was recorded at higher compression newlineratios. Both blends demonstrated increased heat release rates and cylinder pressures. newlineThe VCR engine was also operated with the fuel blends using Prosopis newlineJuliflora Methyl Ester (PJME) with diesel by 15% (B15) and 25% (B25) on a volume newlinebasis at the same operating conditions. Both blends showed higher BTE and lower newlinesmoke and heat release rates than diesel. newlineLater, the tests were again carried out at the same compression ratios using the newlineblend B25DEE1. On a volume basis, this blend consists of PJME 25%, diesel 74%, newlineand DEE 1%. The experiments were repeated by port injecting n-butanol into the newlinepreheated inlet air stream (350-400C). It was conducted with the combustible mixture newlineof diesel (64%), PJME (25%), n-butanol (10%), and DEE (1%), on a volume basis, in newlinePPCI mode. This blend was named BNBDEE1. Higher BTE and reduced pollutants newline(HC, CO, a