ME326_HW9_2NOV2011(1) - ME 326-Homework Assignment #9 Due:...

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ME 326-Homework Assignment #9 Due: 2 November Topic: Otto and Diesel Cycles Text: Chapter 9.1-9.4 Problem #1: A internal combustion engine is to be modeled using an ideal Otto cycle. The air begins the compression process at 25 °C and 100 kPa. The compression ratio of the engine is 10, and the temperature at the end of the combustion process is 2000 °C. Modeling air as an Ideal Gas with variable specific heat determine, a) the specific work input during the compression stroke (kJ/kg), b) the specific heat input during combustion process (kJ/kg), c) the specific work output of the power stroke (kJ/kg), d) the thermal efficiency of the engine. Problem #2: Consider the following specifications for a three-cylinder, four-stroke gasoline engine: Engine Data Engine type Four-stroke cycle, water-cooled Number of cylinders 3 Bore, stroke 74.0 mm, 77.0 mm (dimensions of one cylinder) Horsepower 55 hp at 5700 rpm Compression ratio 9.5 : 1 For this engine determine: a) the displacement volume of one cylinder (cm
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ME326_HW9_2NOV2011(1) - ME 326-Homework Assignment #9 Due:...

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