Explain when energy demand exceeds the output

Reference no: EM13167481

One method used to store energy during times of low demand is by pumping water uphill into a reservoir. When energy demand exceeds the output produced by power plants, the water is released, moves downhill, and is converted into electricity by a turbine. During a 206.0 minute long period of low usage, 65.0 MW is used to pump water up an elevation of 68.7 m in a series of 1.00 m diameter pipes. The friction loss in the pipe going to the upper reservoir is 36.6 m2/s2.

What is the mass flow rate, m, of water during the low usage period? (in kg/s)

What is the total mass of water raised 68.7 m during this 206.0 minute period? (in kg)

How long can the turbines produce 335.0 MW of power from the release of the mass of stored water calculated above? Assume the water sustains a friction loss of 36.6 m2/s2 on the way down to the turbine. (in min)

What is the efficiency of this process? (Assume that the pump and tubines operate at 100% efficiency, and the only loses are due to frictional loses within the pipes.)

Reference no: EM13167481

Questions Cloud

Calculate the amount of heat needed to convert : Calculate the amount of heat needed to convert 96 g of ice at -24C to water at 28C. The specific heat capacity of H2O(s) is 2.1J/g*C.

Sodium hydroxide and calculate the ph : When 50.0 mL of 0.50 M formic acid is titrated with 0.50 M sodium hydroxide, calculate the pH for each of the following: Ka of formic acid = 1.8 x 10^-4 Be sure to account for volume changes at each step.

Which compound will be eluted first : A mixture of p-nitroaniline and o-nitroaniline is separated by column chromatography. which compound will be eluted first? Give reason.

Calculate the velocity of the electron emitted : If copper has a photoelectric threshold wavelength of 279 nm, calculate the velocity (m/s) of the electron emitted when copper is illuminated with light with a frequency of 2.33 × 1015 Hz. Express answer in scientific notation.

Explain when energy demand exceeds the output : One method used to store energy during times of low demand is by pumping water uphill into a reservoir. When energy demand exceeds the output produced by power plants

Calculate the molar mass of the compound : When 33.4 mg of a compound is dissolved in 10.0 ml of water at 25 C the solution has an osmotic pressure of 558 torr. Calculate the molar mass of the compound.

Calculate the equalibrium concentrations of h+ : A solution is made by mixing 500 mL of .167 M NaOH with 500 mL of .1 M CH3COOH. Calculate the equalibrium concentrations of H+. CH3COOH, CH3COO-, OH- and Na+

Determine the equilibrium composition of the mixture : Initially a mixture contains 0.795 mol each of N2 and O2 in an 8.00 L vessel. Find the equilibrium composition of the mixture at 3900 degrees Celcius.

What is the expected cylinder temperature : The pressure in an engine cylinder increases from 7.6 atm to 13 atm as the gas is compressed from 0.50 L to 0.10 L. What is the expected cylinder temperature if the gas was initially 15°C?

User Account

All Pages