Assignment 8

# Assignment 8 - Mech Eng 2W04 2014 Thermodynamics ASSIGNMENT...

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Mech. Eng. 2W04, 2014 Thermodynamics Page 1 of 2 ASSIGNMENT # 8 GAS POWER CYCLES Due Wednesday, March. 26 th , 2014 before 4:00 pm (Drop box # 4 in JHE-307) General instructions: a. This assignment will be worked on through the tutorials of this week (Be prepared) b. Choose one of your peers to be your partner for this assignment, c. Solve the assignment together or solve it separately and check the results with each other, d. Submit just one answer sheet having both of your names, e. The same mark will be given to each one of you. f. You are required to solve all questions. Six randomly chosen questions will only be marked. g. This assignment will be counted as 2%. 1. A four-cylinder, four-stroke internal combustion engine has a bore of 2.55 in. and a stroke of 2.10 in. The clearance volume is 12% of the cylinder volume at bottom dead center and the crankshaft rotates at 3600 RPM. The processes within each cylinder are modeled as an air- standard Otto cycle with a pressure of 14.6 lb f /in 2 and a temperature of 100 o F at the beginning of compression. The maximum temperature in the cycle is 5200 R. Based on this model, calculate the net work per cycle, in Btu, and the power developed by the engine, in horsepower.

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• Spring '14
• Thermodynamics, Internal combustion engine, Thermal efficiency, mean effective pressure, cold air-standard basis

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