One method of meeting the extra electric power demand at peak periods is to pump some water from a large body of water (such as a lake) to a reservoir at a higher elevation at times of low demand and to generate electricity at times of high demand by letting this water run down and rotate a turbine (i.e., convert the electric energy to potential energy and then back to electric energy). For an energy storage capacity of 5 × 106 kWh, determine the minimum amount of water that needs to be stored at an average elevation (relative to the ground level) of 75 m.

Q: A steam power plant receives heat from a furnace at a rate of 280 GJ/h. Heat losses to the…

A: Given Rate of heat = 280 GJ/h Heat loss rate = 8 GJ/h Cooling rate of water = 165 GJ/h To find Net…

Q: A 650 MW steam power plant has an efficiency of 62%.it is cooled by rejecting heat to a nearby…

A: Given Data: Power produced, P=650 MW Efficiency, n=62 %

Q: costs 8 cents per kW-hr, determine the minimum theoretical operating cost to heat the house for 24…

A:

Q: If the energy crossing the boundary of a closed system is not heat, it must be work?

A: Heat and work are path-dependent properties. It cannot be stored. If the energy is crossing the…

Q: A water pump that consumes 5 kW of electric power when operating is claimed to take in water from a…

A:

Q: A 600-MW steam power plant, which is cooled by a nearby river, has a thermal efficiency of 40…

A: Given  The power output of steam power plant = 600 MW  ηt = 40 percent    To determine  Amount of…

Q: It takes 10 kW to keep the interior of a certain house at 20 degree C when the outside temperature…

A: GivenQ=10kWTH=20oC=293KTL=0oC=273K

Q: An electric motor converts electricity to rotating shaft work with an efficiency of 42%. The…

A:

Q: A device collects energy from the sun's rays and produces a high temperature of 95 °C. A small heat…

A: Given Data TH=95°C TL=15°C=288 K

Q: A heat pump is used to maintain a space at 25 C during winter while the outdoor temperature is 10 C.…

A:

Q: A hydraulic turbine receives water from a reservoir at an elevation of 100 m above it. What is the…

A: Given data h = 100 m        ( h = Elevation  ) P = 50 MW = 50 x 10^6 W g = 9.81 m/s^2 ρ = 1000 kg/m3…

Q: A heat pump with a coefficient of performance of 3.5 provides energy at an average rate of 70000…

A: GivenCoefficient of performance COP=3.5Energy at an average rate of QH=70,000 kJ/hOutside temp…

Q: A nonpolluting power plant can be constructed using the temperature difference in the ocean. At the…

A:

Q: The power extracted from the fluid by the turbine (points 1 and 2 are as shown in the figure: z1=35…

A: Power Consumed = Density * Flow * Head

Q: In your own words, define efficiency as it applies to a device designed to perform an energy…

A: The energy can be transformed or converted from one from to another form. The complete conversion of…

Q: Consider the process of heating water on top of an electric range. What are the forms of energy…

A: In the electric range, a high resistance coil is there. when a high-current flows through this coil,…

Q: A gasoline engine is 30% efficient, which means it can transfer 30% of the energy heat provides the…

A: Given : η = 30% m = 0.8 L/hr since 1 hr = 3600 seconds ∴ m = 0.8/3600  L/sec Pc = 3.5*10⁴ kJ/L…

Q: or C - the fraction of the time that it is actually running at its rated power - is less than 100%.…

A: Given data as per question' A power plant with a nominal rating of 1kW does not actually produce 1kW…

Q: In a fossil fuel power plant the chemical energy stored in fossil fuels such as coal, fuel oil,…

A: GIVEN; Coal-fired plant with a capacity of 100 MW = 100×106 W 60% efficiency (40% is lost as heat)…

Q: A central power plant, rated at 800 MW, generates steam at 585 K and discards heat to a river at 295…

A:

Q: Compare wind, solar, and power generation systems with each other and write down their advantages…

A: Wind energy:-wind energy describes the process by which the wind is used to generate mechanical…

Q: A heat engine receives a heat-transfer at the rate of 2 MW at a high temperature of 750 °C. The…

A:

Q: A hydroelectric plant gets water from a dam at the rate of 100 cubic meters per minute to generate…

A:

Q: A Carnot heat pump is used to maintain the temperature inside a building at 20 ∘C. Significantly,…

A: Given data as per question Inside temperature of building = 200C = 293 K  heat lost for each degree…

Q: A central power plant, rated at 500,000 kW, generates steam at 500 K and discards heat to a river at…

A:

Q: If a house needs a minimum heat transfer rate of 75 kJ/h (i.e., 75 kJ of heat needs to be…

A: Given data: QH=75 kJ/hCOP=5.55 Need to determine the amount of electricity supplied to the heat pump…

Q: n inventor claims to have a solar powered heat pump that receives energy as heat from the sun at the…

A:

Q: during the working stroke of an engine the heat transferred out of the system was 160kJ/kg of…

A: GivenQ=-160kJ/kg (the heat transferred out of the system)∆U=-405kJ/kg

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.