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Question 3: (40 Marks) a Superheated vapor of a natural gas enters a gas turbine at 276C and high pressure of 3.37MPa where it expands
Question 3: (40 Marks) a Superheated vapor of a natural gas enters a gas turbine at 276C and high pressure of 3.37MPa where it expands to 976kPa and a temperature of 17C. The turbine is assumed reversible, but not adiabatic. Heat is rejected to the surrounding at an ambient temperature of 15C. It is assumed that the process properties are functions of both the temperature and pressure. a 1. Find the specific heat transfer to the surrounding (kJ/kg) 2. Draw properly the process path in a TS diagram 3. Find the turbine specific work (kJ/kg) 4. Is this turbine efficient? (15 Marks) (5 Marks) (18 Marks) (2marks) Data: Cp=1.7662kJ/kg.K, R=0.2772kJ/kg.K, Tc=305K, Pc=4.88MPa
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