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IJSTR >> Volume 6 - Issue 6, June 2017 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Notion Of Artificial Labs, Slow Global Warming And Advancing Engine Studies: Perspectives On A Computational Experiment On Dual-Fuel Compression-Ignition Engine Research

[Full Text]



Tonye K. Jack, Emmanuel N. Nyeche



Alternative Fuels, Compression-Ignition Engines, Diesel Engine, Dual-Combustion Cycle, Dual-Fuel Engine, Engines, Internal Combustion Engine, Limited-Pressure Cycle, Marine Engines, MATLAB, Pollutant Control, Simulation.



To appreciate ‘clean’ energy applications of the dual-fuel internal combustion engine (D-FICE) with pilot Diesel fuel, to aid public policy formulation in terms of present and future benefits to the modern transportation, stationary power, and promotion of oil and gas “green- drilling”, the brief to an engine research team was to investigate the feasible advantages of dual-fuel compression-ignition engines, guided by the following concerns: (i) Sustainable fuel and engine power delivery? (ii) The requirements for fuel flexibility? (iii) Low exhausts emissions and environmental pollution? (iv) Achieving low specific fuel consumption and economy, for maximum power? (v) The comparative advantages over the conventional Diesel engines? (vi) Thermo-economic modeling and analysis for the optimal blend as basis for a benefit/cost evaluation? Planned in two stages for reduced cost and fast turnaround of results - initial preliminary stage with basic simple models, and advanced stage with more detailed, complex modeling. The paper describes a simplified MATLAB based computational experiment predictive model for the thermodynamic, combustion and engine performance analysis of dual-fuel compression-ignition engine studies operating on the theoretical limited-pressure cycle with several alternative fuel-blends. Environmental implications for extreme temperature moderation are considered by finite-time thermodynamic modeling for maximum power, with predictions for pollutants’ formation and control by reaction rates kinetics analysis of systematic reduced plausible coupled chemistry models through the NCN reaction pathway for the gas-phase reactions classes of interest. Controllable variables for engine-out pollutants emissions reduction and in particular NOx elimination are identified. Verifications and Validations (V&V) through Performance Comparisons were made using a clinical approach in selection of Stroke/Bore ratios greater-than and equal-to one (≥1), low-to-high engine speeds, and medium to high power requirements from data of existing dual-fuel engines and convertible real diesel engines applied in different industry sectors. The results obtained show that dual-fuel engines operating on limited-pressure cycle have economical and environmental advantages in terms of engine efficiency, and fuel consumption; with the engine emissions results showing promise of operating within the desired United Nations’ guide for slow climate change, with reduced carbon dioxide (CO2).



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