Question: A small air-cooled gasoline engine is tested, and the output is found to be 1.0 kW. The temperature of the products is measured to 600

A small air-cooled gasoline engine is tested, and the output is found to be 1.0 kW. The temperature of the products is measured to 600 K. The products are analyzed on a dry volumetric basis, with the result: 11.4% CO2, 2.9% CO, 1.6% O2 and 84.1% N2. The fuel may be considered to be liquid octane. The fuel and air enter the engine at 25°C, and the flow rate of fuel to the engine is 1.5 × 10-4 kg/s. Determine the rate of heat transfer from the engine and its thermal efficiency.

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a C 8 H 18 b O 2 376b N 2 114 CO 2 29 CO c H 2 O 16 O 2 841 N 2 b 841376 2237 a 1... View full answer

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