18. A hydroelectric power plant has the hydraulic turbine located 60 m below the elevation of the intake pipe. The 1-m diameter pipe delivers water with a velocity of 3 m/s at a temperature of 15 °C to the turbine. The heat transfer between the turbine and the surroundings is negligible. Determine the power developed in kW.

18. A hydroelectric power plant has the hydraulic turbine located 60 m below the elevation of the intake pipe. The 1-m diameter pipe delivers water with a velocity of 3 m/s at a temperature of 15 °C to the turbine. The heat transfer between the turbine and the surroundings is negligible. Determine the power developed in kW.

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

Water is pumped from a lake to a storage tank 15 m above at a rate of 70 L/s while consuming 15.4 kW of electric power. Disregarding any frictional losses in the pipes and any changes in kinetic energy, determine (a) the overall efficiency of the pump–motor unit and (b) the pressure difference between the inlet and the exit of the pump.
In climates with low night-time temperatures, an energy-efficient way of cooling a house is to install a fan in the ceiling that draws air from the interior of the house and discharges it to a ventilated attic space. Consider a house whose interior air volume is 720 m3 If air in the house is to be exchanged once every 20 minutes, determine (a) the required flow rate of the fan and (b) the average discharge speed of air if the fan diameter is 0.5 m..
A pump at 65% efficiency is used to transport water from a large open reservoir to a point 10m above at a rate of 450 L/min, into a vented tank. Assuming friction is negligible and that the efficiency of the motor is 77%, determine electricity required to keep the process running for 24 hours.
A hydraulic turbine has 50 m head available at a flow rate of 1.30 m^3/s, and its overall turbine generator efficiency is 78 %. Determine the electric power output of this turbine in kW a.237 b.589 c.378 d.497
A fan is to be selected to ventilate a bathroom whose dimensions are 2 m × 3 m × 3 m. The air velocity is not to exceed 7 m/s to minimize vibration and noise. The combined efficiency of the fan–motor unit to be used can be taken to be 50 percent. If the fan is to replace the entire volume of air in 15 min, determine (a) the wattage of the fan–motor unit to be purchased, (b) the diameter of the fan casing, and (c) the pressure difference across the fan. Take the air density to be 1.25 kg/m3 and disregard the effect of the kinetic energy correction factors.
Seawater is to be pumped into a large tank at a rate of 165 kg/min. The tank is opwn to atmostsphere and the water enters the tank from a 80 m height. The overall efficiency of the motor pump unit is 75 percent and the motor consumes electricity at a rate of 3.2 KW. If the irreversible headloss in the piping is 7 m, the velocity of the water (in m/s) at the tank inlet is. Ans: 6.21Note: Include free body diagram
A dam with a hydraulic turbine–generator located 40 m below the water surface has a rate of 4600 kg/s flowing through the penstock. If the electric power generated is measured to be 1400 kW and the generator efficiency is 95%, determine: (a) the overall efficiency of the turbine–generator, (b) the mechanical efficiency of the turbine, (c) the shaft power supplied by the turbine to the generator.
Seawater is to be pumped into a large tank at a rate of 165 kg/min. The tank is opwn to atmostsphere and the water enters the tank from a 80 m height. The overall efficiency of the motor pump unit is 75 percent and the motor consumes electricity at a rate of 3.2 KW. If the irreversible headloss in the piping is 7 m, the velocity of the water (in m/s) at the tank inlet is Show FBD and choose th correct answer A. 7.12 B. 6.21 C. 5.05 D. 8.7
A pump rated at 1800 W is used to transfer water from an open tank to another open tank. The surfaces of the two tanks are kept 20 m apart, vertically, while the mass flow of the water is 5 kg/s. Determine the efficiency of the pump
A fluid flows at 450 ft/s with specific volume of 12.8 ft3 /lbm, pressure of 14.7 psia and specific enthalpy of 430 Btu/lbm. Determine (a) the specific internal energy and (b) the total energy if potential energy is neglected. Ans: 395.2 Btu/lbm; 434.04 Btu/lbm
Seawater is to be pumped into a large tank at a rate of 165 kg/min. The tank is opwn to atmostsphere and the water enters the tank from a 80 m height. The overall efficiency of the motor pump unit is 75 percent and the motor consumes electricity at a rate of 3.2 KW. If the irreversible headloss in the piping is 7 m, the velocity of the water (in m/s) at the tank inlet is ( WITH FREE BODY DIAGRAM) CHOICES: A.7.12 B.6.21 C.8.7 D.5.05
15. A hydro-electric plant in Loboc, Bohol discharges 12300cfm and reduces the pressure from 2585mm Hg to 61.06in Hg. Determine the power in kW.