TEST_3_Sp96

# TEST_3_Sp96 - ME 326: THERMODYNAMICS I Test 3, April 29,...

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ME 326: THERMODYNAMICS I Test 3, April 29, 1996 1) (33%) A 2-stroke ideal air-standard spark-ignition (Otto) engine (c P for air=constant=1.00 kJ/kg•K) has a compression ratio of 8:1, and operates at 2400 rpm. Fuel input to the engine is 5 kJ/revolution. The engine is used to drive an air-conditioner with a COP of 5.0. How much cooling capacity will this system have (kW)? SOLUTION: The Otto cycle efficiency is 2) (33%) The steam turbine in a Rankine power plant with superheat operates with an inlet temperature of 650°C at an inlet pressure of 1 MPa, and exhausts to an exit pressure of 4 kPa. When operating with a steam flow rate of 5 kg/s, the measured power output of the turbine is 5.753 MW. The pump in the cycle is isentropic. a) Fill in the state table below except where dashes appear. (The states are numbered as for Fig. 7.6 in the text). b) What is the cycle efficiency? c) What is the turbine efficiency? State Table:

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## This note was uploaded on 09/01/2010 for the course ME 320 taught by Professor Dr.kinne during the Spring '07 term at University of Texas.

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TEST_3_Sp96 - ME 326: THERMODYNAMICS I Test 3, April 29,...

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