5-46 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 12 kg/s. Determine (a) the change in kinetic energy, (b) the power output, and (c) the turbine inlet area. Answers: (a) – 1.95 kJ/kg, (b) 12.1 MW, (c) 0.0130 m? P = 4 MPa T = 500°C V1 = 80 m/s %3D %3D for pib nod 12-4 000 bis %3D onimatsb Steam m = 12 kg/s T0o b ng a W out

5-46 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 12 kg/s. Determine (a) the change in kinetic energy, (b) the power output, and (c) the turbine inlet area. Answers: (a) – 1.95 kJ/kg, (b) 12.1 MW, (c) 0.0130 m? P = 4 MPa T = 500°C V1 = 80 m/s %3D %3D for pib nod 12-4 000 bis %3D onimatsb Steam m = 12 kg/s T0o b ng a W out

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

A pump increases the water pressure from 8 kPa at the inlet to 700 kPa at the outlet. Water enters this pump at 41.51°C through a 1.774-cm-diameter opening and exits through a 2.327-cm-diameter opening. Determine the velocity of the water at the outlet in m/s when the mass flow rate through the pump is 1.163 kg/s. The specific volume of incoming water is 1.303 x 10³ m³/kg.
A site is being considered for wind power generation. At this site, the wind blows steadily at 9 m/s for 2,579 hours per year. Assuming the wind velocity is negligible at other times for simplicity, determine the kWh/year that can be produced at the site for a turbine with a mechanical efficiency of 100% and an effective flow area of 5 m2. Use a value of 1.25 kg/m3 for the density of the air. Give your answer in killowatt-hours per year (kWh/year). Hint: I reccomend starting by finding the kinetic energy (kJ/kg) of the wind. Hint 2: Multiply the power generation (kW) by the number of hours of wind per year (h/year) to get kWh/year.
A pump increases the water pressure from 8 kPa at the inlet to 700 kPa at the outlet. Water enters this pump at 41.51℃ through a 1.122-cm-diameter opening and exits through a 2.709-cm-dameter opening Determine the velocity of the water at the outlet in m/s hen the mass flow rate through the pump is 1.693 kg/s. The specific volume of incoming water is 1.038x10^-3 m^3/kg.
A pump increases the water pressure from 8 kPa at the inlet to 700 kPa at the outlet. water enters this pump at 41.51 degree celcius through a 1.15-cm diameter opening. Determine the velocity of the water at the outlet in m/s when the mass flow rate through the pump is 2.637 kg/s the specific volume of incoming water is 1.799 x 10-3 m3/kg.
R-134a enters a compressor as a saturated vapor at 80 kPa and exits at a pressure of 400 kPa. If 44 kJ/kg of work is required and 5 kJ/kg of heat is lost to the surroundings. What is the outlet temperature. Round your answer to the nearest whole number.
The case of a piston-cylinder device provided with stops is presented. Initially, the water supports the weight of the piston, and the force of the atmosphere is 300 kPa and 0.4 m3/kg. The water is heated until it reaches a saturated steam condition and the plunger rests on the stops. With the piston on the stops, the water is heated to a pressure of 700 kPa. Plot the curves of the processes on the p-V and T-V diagrams indicating the initial and final states of the guide. On both the p-V and T-V diagrams plot the isotherms passing through both states, and show their values in °C.
5-62 Refrigerant-134a is throttled from the saturated liquid state at 700 kPa to a pressure of 160 kPa. Determine the tem- perature drop during this process and the final specific vol- ume of the refrigerant. Answers: 42.3°C, 0.0345 m³/kg P₁ = 700 kPa sat. liquid R-134a P₂ = 160 kPa FIGURE P5-62
Water is being heated in a close pan on top of a range while being stirred by a paddle wheel. During the process, 30kj of heat are transferred to the water, and 5kj of heat is lost to the surrounding air. The paddle-wheel work amounts to 500 N*m. Determine the final energy of the system if its initial energy is 10kj.
5-51 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 12 kg/s. Determine (a) the change in kinetic energy, (b) the power output, and (c) the turbine inlet area. P₁ = 4 MPa T₁ = 500°C V₁ = 80 m/s Steam m = 12 kg/s P₂ = 30 kPa X₂ = 0.92 V₂ = 50 m/s W out
Air is compressed in a cylinder polytropically from an initial temperature and pressureof 84°F and 16 psia to a final of 290°F and 78 psia. The cylinder contains 0.015 lb of air,and has a piston area of 0.18 sq ft. Sketch the process on P - v and T – s coordinates andfind the work done, ft.lbfA. (-)648.41 (on) B. (-)850.85 (on) C. (-)950.85 (on) D. (+)648.41 (by)
In a centrifegal compressor air flows steadily at a rate of 2,1 kg/s and 81,00m/s with a pressure of 90kpa and specific volume of 0,85cubic meter per kilograms. The exit condtions are: speed 200m/s, pressure 900kpa and specific volume of 0,13cubic meter per kilograms. The internal energy of the air at exit is 90kj/kg greater than that of the air at inlet. Heat is loss during compressor at the rate of 95kj/s. Calculate the following; (a) power required to drive the compressor (b) Diameter of the inlet and outlet pipes?
A pump increases the water presssure from 8kPa at the inlet to 700 kPa at the outlet. Water enters this pump at 41.51 degrees celsius through a 1.145-cm-diameter opening and exits through a 2.821-cm-diameter opening. Determine the velocity of the water at the outlet in m/s when the mass flow rate through the pump is 1.354kg/s. The specific volume of incoming water is 1.547x10-3m3/kg.