Homework 9 Due April 14 (3)

Homework 9 Due April 14 (3) - Homework 9 Due April 14 1 How...

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Homework 9 Due April 14 1. How is a gasoline engine different from a diesel? 2. For a specified compression ratio, is a diesel or gasoline engine more efficient? 3. Do diesel or gasoline engines operate at higher compression ratios? Why? 4. Air enters the compressor of a gas-turbine engine at 300 K and 100 kPa, where it is compressed to 700 kPa and 580 K. Heat is transferred to air in the amount of 950 kJ/kg before it enters the turbine. For a turbine efficiency of 86%, determine a) the fraction of turbine work output used to drive the compressor, and b) the thermal efficiency. Assume
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