Large wind turbines with a power capacity of 8 MW and blade span diameters of over 160 m are available for electric power generation. Consider a wind turbine with a blade span diameter of 100 m installed at a site subjected to steady winds at 8 m/s. Taking the overall efficiency of the wind turbine to be 32 percent and the air density to be 1.25 kg/m3 , determine the electric power generated by this wind turbine.

Q: well water is pumped into a thank that is 25 meters high through a pipe with an inner diameter of…

A: Given data:

Q: An old gas turbine has an efficiency of 21 percent and develops a power output of 6000 kW. Determine…

A: Given Data: The turbine efficiency is: η=21 % The power developed in output is: W=6000 kW The…

Q: An oil pump is drawing 25 kW of electric power while pumping oil with ρ = 860 kg/m3 at a rate of 0.1…

A: Given Data: Inlet and outlet areas of the cross-section of pipe to the pump can be calculated as,

Q: Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel.…

A: Given data: The heat transferred to the water is Q1=30 kJ. The heat lost by the surroundings is…

Q: Give examples of pump efficiency and turbine efficiency?

A: The range of the efficiency of a smaller centrifugal pump varies from 50 to 70 percent whereas for…

Q: How is electricity generated from wind

A: Wind turbines operate on a simple principle: instead of using electricity to generate wind (like…

Q: a 200-W vacuum cleaner is powered by an electric motor whose efficiency is 80%. (Note that the…

A: Given data Power of the vacuum cleaner = 200  W  Efficiency of the electric motor = 80 % To…

Q: 5. Electric power is to be generated by installing a hydraulic turbine-generator at a site 120 m…

A: Given data, H = 120 m     (H = height of water from free surface) m = 1500 kg/s   (m = mass flow…

Q: A motor hoists a 60-kg crate at a constant velocity to a height of 5 m in 2 s. If the indicated…

A:

Q: Electric power is to be generated by installing a hydraulic turbine–generator at a site 120 m below…

A: Given data :H= 120 mm.= 1500 kg/s

Q: A 90-hp (shaft output) electric car is powered by an electric motor mounted in the engine…

A: Given   Output energy, E2 = 90 hp                 Efficiency = 91%                                 =…

Q: 2. A water jet that leaves a nozzle at 60 m/s at a flow rate of 120 kg/s is to be used to generate…

A: Given: The mass flow rate, m = 120 kg/s The velocity of jet, v = 60 m/s

Q: A river flows to a lake at a rate of 120 m/s. The river is located at an elevation of 100 m above…

A: Given data: Volumetric flow rate of river into the lake, Q=120 m3/s. River is located at a elevation…

Q: at a certain location, wind is blowing steadily at 10 m/s. determine the mechanical energy of air…

A:

Q: The water in a large lake is to be used to generate electricity by the installation of a hydraulic…

A: Given data as per question Depth of water =50 m Water flow rate = 5000kg/s Power generated = 1862 kw…

Q: Consider a river flowing toward a lake at an average speed of 3 m/s at a rate of 500 m3/s at a…

A: Given: The average speed of the river is v=3 m/s. The rate of the flow of the river is V=500 m3/s.…

Q: wind turbine with a blade span diameter of 142 m installed at a site subjected to steady winds at 7…

A:

Q: Calculate the total kinetic energy, in BTU, of an object with a mass of 10 kg when its velocity is…

A:

Q: A 2-kW pump is used to pump kerosene (ρ = 0.820 kg/L) from a tank on the ground to a tank at a…

A: We know that,  P=ρgQH                                     (where P=Head Power ,H=head difference and…

Q: Consider a river flowing toward a lake at an average velocity of 3 m/s at a rate of 570 m³/s at a…

A: Given data: V=3 m/sz=90 mV˙=570 m3/s Need to determine the total mechanical energy of the river per…

Q: A hydraulic turbine is used to generate power by using water in a dam. The elevation difference…

A:

Q: Steam flows into a turbine at the rate of 10 kg/s and 10 KW of heat are lost from the turbine.…

A: Given:mass flow rate of steam, m=10 Kg/sHeat lost, Ql=10 KWh1=2739 KJ/Kgh2=2300.5 KJ/Kg

Q: A wind turbine has a blade length of 30 m. In a given day, average speed of wind for 5 hours is 9…

A: Wind Turbine is a device that converts mechanical energy into electrical energy. The kinetic energy…

Q: Electric power is to be generated by installing a hydraulic turbine–generator at a site 100 m below…

A:

Q: When water is pumped into a water tank 20 m above a lake with a flow rate of 70 l/s, 20.4kW of…

A: Given data :- Flow rate = 70 l/sec Head = 20 m Electrical power = 20.4 kw

Q: Does a heat engine that has a thermal efficiency of 100 percent necessarily violate the second law…

A: Yes, a heat engine having 100% thermal efficiency will violate the Kelvin Planck statement of the…

Q: Can the combined turbine–generator efficiency be greater than either the turbine efficiency or the…

A: Consider the efficiency of the turbine be ηT, the efficiency of the generator be ηG and the combined…

Q: The utility company is selling electric power for $0.06/kWh at night, and $0.13/kWh for power…

A: Calculate the power required for pumping operation. Pin=γQH+hLηp Here, Pin is the power required for…

Q: Show that the power produced by a wind turbine is proportional to the cube of the wind velocity and…

A: The power generated depends primarily on the discharge through the turbines and the hydraulic head.…

Q: A hydraulic turbine is used to generate power by using the water in a dam. The elevation difference…

A: Given data: Hydraulic turbine used to generate power in hydroelectric power station Net head (H)…

Q: At a certain location, wind is blowing steadily at 10 m/s. Determine the mechanical energy of air…

A: Given data: Velocity of wind, v = 10 m/s. The diameter of the wind turbine, d = 70 m. The overall…

Q: Consider a river flowing toward a lake at an average velocity of 22.5 km/hr at a rate of 387 m3/s at…

A:

Q: At a certain location, wind is blowing steadily at 10 m/s. Determine the mechanical energy of air…

A:

Q: How does a geothermal power plant generate electricity? Explain on the basis of heat transfer and…

A: Given: Explain a geothermal power plant on the basis of energy transformation to generate…

Q: An oil-transfer pump uses 1 kW of power in transferring 5 kg/s of oil through a 3-cm-diameter pipe.…

A:

Q: A water jet that leaves a nozzle at 53.24 m/s at a flow rate of 117.37 kg/s is to be used to…

A: Nozzle is a device which converts pressure energy into kinetic energy. At the exit of nozzle, only…

Q: What are the two forms of energy interactions associated with a closed system, explain it?

A: In a closed thermodynamic system, the mass of the substance is not allowed to cross the boundary of…

Q: An oil pump is drawing 44 kW of electric power while pumping oil with ρ = 860 kg/m3 at a rate of 0.1…

A: First, we calculate the mechanical power output…

Q: Electric power is to be generated in a hydroelectric power plant that receives water at a rate of 70…

A: Given data: The volume flow rate of the water, V = 70 m3/s. Height of water, h = 65 MPa. The…

Q: Q1/ Electric power is to be generated by installing a hydraulic turbine- generator at a site 120 m…

A: Given data  Available Head (H) = 120 m  Mass flow rate (m˙) = 2400 kg/s   To determine  the power…

Q: On flat ground, a 70 kg person requiresabout 300 W of metabolic power to walk at a steady pace of5.0…

A: Given data Subscript 'w' and 'b' represent walking and biking by the person.

Q: Solar energy stored in large bodies of water, called solar ponds, is being used to generate…

A: Given Data: The efficiency of the solar power plant is, η=3%=0.03. The net power output of the power…

Q: A wind turbine has a blade length of 20 m. In a given day, average speed of wind for 4 hours is 7…

A:

Q: A river flowing steadily at a rate of 125 m3/s is considered for hydroelectric power generation. It…

A: Data given  Q = V• = 125 m3/s  h = 70 m

Q: Consider a river flowing toward a lake at an average velocity of 3 m/s at a rate of 500 m3 /s at a…

A: At the location of 90 m, the river is flowing with an average velocity of 3 m/s. So, the total…

Q: On a hot summer day, the air in a well-sealed room is circulated by a 0.50-hp fan driven by a 65…

A: This question is based on the concept of thermodynamics.

Q: A water jet that leaves a nozzle at 58.08 m/s at a flow rate of 118.14 kg/s is to be used to…

A:

Applied Fluid Mechanics

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.