X Your answer is incorrect.Steam enters a well-insulated turbine operating at steady state at 4 MPa with a specific enthalpy of 3015.4 kJ/kgand a velocity of 10 m/s. The steam expands to the turbine exit where the pressure is 0.07 MPa, specific enthalpy is2431.7 kJ/kg, and the velocity is 90 m/s. The mass flow rate is 11.95 kg/s.Neglecting potential energy effects, determine the power developed by the turbine, in kW.3004.4kW

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Answered: Steam enters a well-insulated turbine…

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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Problem #1: Helium gas flows through a well-insulated nozzle at steady state. The temperature and velocity at the inlet are 550 °R and 150 ft/s, respectively. At the exit, the temperature is 400 °R and the pressure is 40 psi. The area of the exit is 0.0085 ft². Using the ideal gas model with k=1.67, and neglecting potential energy effects, determine the mass flow rate, in lbm/s through the nozzle.
Refrigerant 134a enters a horizontal pipe operating at steady state at 40°C, 300 kPa, and a velocity of 25 m/s. At the exit, the temperature is 50°C and the pressure is 240 kPa. The pipe diameter is 0.055 m. Determine: (a) the mass flow rate of the refrigerant, in kg/s, (b) the velocity at the exit, in m/s, and (c) the rate of heat transfer between the pipe and its surroundings, in kW.
Steam enters a turbine operating at steady state at 1.5 MPa and 418.4 °C, with a velocity of 79 m/s. Saturated vapour exits at 0.2 MPa and a velocity of 40 m/s. The elevation of the inlet is 2.8 m higher than the exit. The mass flow rate is 11.7 kg/s and the power developed is 5.5 MW. a) Using the property tables calculate the specific volume of the steam at the inlet m/kg b) Compute the area of the inlet m2 c) Using the property tables calculate the specific enthalpy of the steam entering the turbine kJ/kg
Water at p1 = 20 bar, T1 = 400oC enters a turbine operating at steady state and exits at p2 = 1.5 bar, T2 = 180oC. The water mass flow rate is 4000 kg/hour. Stray heat transfer and kinetic and potential energy effects are negligible. Determine the power produced by the turbine, in kW, and the rate of entropy production in the turbine, in kW/K.
Carbon dioxide gas is compressed at a steady state from a pressure of 16 lbf/in2 and a temperature of 32oF to a pressure of 50 lbf/in2 and a temperature of 130oF. The gas enters the compressor with a velocity of 30 ft/s and exits with a velocity of 80 ft/s. The mass flow rate is 3500 lb/hr. The magnitude of the heat transfer rate from the compressor to its surroundings is 5% of the compressor power input. Use the ideal gas model with cp = 0.21 Btu/lb·oR and neglect potential energy effects. A.) Determine the flow area at the inlet, in ft2, B.) and the power required by the compressor to work, in horsepower. Show complete solutions.
8. Steam enters a turbine operating at steady state with a mass flow rate of 3000 kg/h. The turbine develops a power output of 700 kW. At the inlet, the pressure is 40 bar, the temperature is 500°C, and the velocity is 9 m/s. At the exit, the pressure is 0.1 bar, the quality is 0.9 (90%), and the velocity is 30 m/s. Calculate the rate of heat transfer between the turbine and surroundings, in kW.

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