MET 644 Advanced Combustion Exam 2022

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A 1-page Second Semester Exam for Advanced Combustion (MET 644), University of Buea College of Technology, Department of Mechanical Engineering, instructor Prof. Ngouateu, dated June 17th 2022, Academic Year 2021/2022, credit value 06, time allowed 3 hours. Three calculation-heavy exercises: (1) percentage combustion-product analysis by mass and volume for a hydrocarbon fuel with 86% C and 14% H2 burned with 50% excess air, plus the change in internal energy of the products cooling from 2100C to 900C using a given internal-energy table; (2) percentage excess air supplied to a boiler burning coal of given ultimate composition, from a volumetric dry flue-gas analysis; (3) for a fuel of given volumetric composition (H2, CH4, CO, CO2, O2, N2) with given higher calorific values, the air required for complete combustion of 1 cubic metre of fuel, the volumetric dry flue-gas analysis with 20% excess air, and the fuel's lower calorific value.