1. Steam enters an adiabatic turbine at a pressure of 7 MPa, a temperature of 500 °C and a velocity of 45 m/s and a pressure of 100 kPa. and comes out with a speed of 75 m/s. If the turbine's output power is 5 MW and the isentropic efficiency is 77%, a) The mass flow rate of the steam passing through the turbine, b) The temperature at the turbine outlet, c) Calculate the entropy production rate that occurs during the process.

1. Steam enters an adiabatic turbine at a pressure of 7 MPa, a temperature of 500 °C and a velocity of 45 m/s and a pressure of 100 kPa. and comes out with a speed of 75 m/s. If the turbine's output power is 5 MW and the isentropic efficiency is 77%, a) The mass flow rate of the steam passing through the turbine, b) The temperature at the turbine outlet, c) Calculate the entropy production rate that occurs during the process.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.

Question

1. Steam enters an adiabatic turbine at a pressure of 7 MPa, a temperature of 500 °C and a velocity
of 45 m/s and a pressure of 100 kPa.
and comes out with a speed of 75 m/s. If the turbine's output power is 5 MW and the isentropic
efficiency is 77%,
a) The mass flow rate of the steam passing through the turbine,
b) The temperature at the turbine outlet,
c) Calculate the entropy production rate that occurs during the process.

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Step 1: Requirements:

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Step 2: a. Mass Flow Rate:

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Step 3: Finding the actual final enthalpy:

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Step 4: b. Temperature:

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Step 5: c. Entropy:

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An adiabatic compressor brings 5 kg/h of air from atmospheric pressure, 300 K and an enthalpy of 300 kJ/kg to 1.8 MPa and 670 K and an enthalpy of 750 kJ/kg. a) What is the global efficiency of the compression equipment if it consumes 1.2 kW of electrical current? b) What is the volume change of air generated by the compressor?
4. Define the requirements for a process to be considered isentropic. Please select all answers that apply: a) Flows through the turbine and pump occur adiabatically and without irreversibility. b) Isentropic processes are frictionless processes only. c) Isentropic processes are adiabatic processes only. d) Isentropic processes are constant pressure processes. e) Isentropic processes are constant temperature processes.
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! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 4 MPa, 500°C, and 80 m/s and the exit conditions are 30 kPa, 92 percent quality, and 50 m/s. The mass flow rate of the steam is 11.4 kg/s. The properties of the steam are y = 0.086442 m3/kg, m = 3446 kJ/kg, and h2 = 2437.7 kJ/kg. P1 = 4 MPa T = 500°C V1= 80 m/s Steam n kg/s Wot P2= 30 kPa X= 0.92 V2= 50 m/s Determine the change in kinetic energy. (You must provide an answer before moving on to the next part.) The change in kinetic energy is 1.95 O kJ/kg.
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