I. Steam flows steadily into a turbine with a mass flow rate of 20 kg/s at 6 MPa and 600°C with a velocity of 120 m/s. The steam exits the turbine at 0.5 MPa and 200°C with a negligible velocity. Determine the power produced by the turbine and the work done per unit mass.

I. Steam flows steadily into a turbine with a mass flow rate of 20 kg/s at 6 MPa and 600°C with a velocity of 120 m/s. The steam exits the turbine at 0.5 MPa and 200°C with a negligible velocity. Determine the power produced by the turbine and the work done per unit mass.

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

See similar textbooks

Similar questions

Steam enters an adiabatic turbine at 5 MPa, 500 ºC, and 80 m/s and leavesat 50 kPa, 150 ºC, and 140 m/s. If the power output of the turbine is 8MW, determine the following:a. The mass flow rate of the steam flowing through the turbine,b. The isentropic efficiency of the turbine,c. Draw both the actual and isentropic processes that the steamundergoes from state 1 to state 2 on a T-s diagram. Be sure to includethe following:i. where states 1, 2s, and 2a are in the diagramii. the corresponding x and y values for the states listed aboveiii. the corresponding isobar lines and their valuesiv. the names of the regions where each state is located (i.e., eithercompressed liquid, superheated vapor, saturated liquid-vaporregion, saturated liquid line, saturated vapor line, critical point)
10 kg/s of steam (H2O) enters a turbine at 10 m/s and a specific enthalpy of 3500 kJ/kg and leaves at an outlet 10m below the inlet with a specific enthalpy of 2500 kJ/kg and a velocity of 20 m/s. Assume steady-state steady-flow. If the heat lost from the turbine is 20% that of the turbine work, determine a.) the turbine horsepower. If the turbine is coupled to a generator with a 90% electrical efficiency, and the turbine horsepower has an 80% mechanical efficiency, b.) how much income will a power plant generate in one year if the electrical energy is sold at PhP 3.51 per kW-hr? (Hint: Mechanical efficiency = actual turbine work / ideal turbine work. Electrical efficiency of a generator = electrical output / actual turbine work.)
2nd - Air enters an adiabatic gas turbine at 490ºC and exits at 108ºC. If the inlet and outlet velocities are 43 m/s and 58 m/s, respectively, which of the following is the energy obtained from the turbine? Take Cp = 1.048 kJ/kg K. a) 380.1 kJ/kg B) 401.1 kJ/kg NS) 390.6 kJ/kg D) 389.1 kJ/kg TO) 386.5 kJ/kg
Refrigerant R-134a at 200 kPa and 80 °C enters an adiabatic diffuser steadily with a velocityof 600 m/s and leaves at 10 bar and 150 °C. Determine:a) The exit velocityb) The inlet to exit area ratioc) The inlet exit density ratio
Steam is condensed at a constant temperature of 30°C as it flows through the condensor of a power plant by rejecting heat at a rate of 55 MW. The rate of entropy change of steam as it flows through the condenser is (a) −1.83 MW/K (b) −0.18 MW/K (c) 0 MW/K (d) 0.56 MW/K (e) 1.22 MW/K
Air enters a gas turbine at P1=1100 kPa and T1= 860 K and leaves the turbine at P2=100 kPa andT2= 450 K. Air enters the turbine through a pipe with an internal cross-section of 0.3 m2and anaverage velocity of 10 m/s, and exhausts through a larger pipe with an internal cross-section of 1m2. (for air, R=0.287kJ/kgK)Figure question 4. Air turbine running at steady stateYou can assume that Change of Potential energy is negligible.TurbineP1=1.1 MPaT1=860 KV1=10 m/sh1=?, v1=?P2=100 kPaT2= 450 Kh2=?, v2=?V2=?InletOutlet?̇=?Airm=2 kg3 Change of Kinetic energy is not negligible. Turbine is well insulated and there is no heat transfer. Air is an ideal gas. The turbine operates at steady state.Please answer the following questions:a) Determine the inlet specific enthalpy (ℎ1) and inlet specific volume (?1).b) Determine the mass flow rate of air through the turbine.c) Determine the specific enthalpy at outlet ( ℎ2) and specific volume at outlet (?2).d) Determine the average velocity of air at…
THERMODYNAMICS A 1.5-kW power output is produced by a small, high-speed turbine that runs on compressed air. The entrance state is 400 kPa and 52 degrees celcius, whereas the exit state is 150 kPa and -43 degrees celcius. Determine the needed mass flow rate of air through the turbine assuming low velocities and an adiabatic process.
Steam is to be condensed in the condenser of a steam power plant at a temperature of 60°C with cooling water from a nearby lake, which enters the tubes of the condenser at 18°C at a rate of 75 kg/s and leaves at 27°C. Assuming the condenser to be perfectly insulated, determine the rate of entropy generation in the condenser.
4. Steam enters the condenser of a steam power plant at 20000 kPa and a quality of 95 percent with a mass flow rate of 20 Mg/h. It is to be cooled by water from a nearby river in circulating the water through the tubes within the condenser. To prevent thermal pollution, the river water is not allowed to experience a temperature rise above 10oC. If the steam is to leave the condenser as saturated liquid at 20000 Pa, determine the mass flow rate of the cooling water required
Refrigerant-134a is to be cooled by water in a condenser. The refrigerant enters the condenser with a mass flow rate of 6 kg/min at 1 MPa and 70ºC and leaves at 35°C. The cooling water enters at 300 kPa and 15°C and leaves at 25ºC. Neglecting any pressure drops, determine (a) the mass flow rate of the cooling water required and (b) the heat transfer rate from the refrigerant to water
Air enters the compressor of a gas turbine plant at ambient conditions of 100 kPa and 25 ⁰Cwith a low velocity and exits at 1 MPa and 347 ⁰C with a velocity of 90 m/s. The compressionprocess is adiabatic, and the power input is 251. Determine the mass flowrateof the air through the compressor please be clear with the writing and explaining
Steam in an adiabatic turbine expands at a pressure of 6 MPa and a temperature of 450 ° C to a pressure of 0.1 MPa with a flow rate of 6 kg / s. If steam leaves the turbine as saturated steam, what will the power output of the turbine be?