Question: Energy may be stored for use during peak demand by pumping water to a high reservoir when demand is low and then releasing it to

Energy may be stored for use during peak demand by pumping water to a high reservoir when demand is low and then releasing it to drive turbines when needed. Suppose water is pumped to a lake 135m above the turbines at a rate of 1.00 X 105 kg/s for 10.0 h at night.
(a) How much energy (kWh) is needed to do this each night?
(b) If all this energy is released during a 14-h day, at 75% efficiency, what is the average power output?

Step by Step Solution

★★★★★

3.23 Rating (178 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a Assume that there are no dissipative forces pres... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

P-T-F-L (412).docx

120 KBs Word File

Students Have Also Explored These Related Thermodynamics Questions!

Energy may be stored by pumping water to a high reservoir when demand is low and then releasing it to drive turbines during peak demand. Suppose water is pumped to a lake 115 m above the turbines at...

Energy reaches Earth from the Sun at a rate of about 1400W/m2. Calculate (a) The total power output of the Sun, and (b) The number of protons consumed per second in the reaction of Eq 31-7 assuming...

Energy reaches Earth from the Sun at a rate of about 1300 W/m2. Calculate (a) The total power output of the Sun, (b) The number of protons consumed per second in the reaction of Eq. 31-7, assuming...

TB0383 Andrew C. Inkpen General Electric's Corporate Strategy Like the premature obituary of writer Mark Twain, reports of the death of the conglomerate are often exaggerated. Diversified companies,...

I have no idea how to start the cash flow operations analysis in part 1 Enron Annual Report 2000 Enron Annual Report 2000 Enron manages efficient, flexible networks to reliably deliver physical...

Question 1 Criticallyanalyzethe statement petroleum industry is also highly capital-intensive, so strong returns are critical to attracting low-cost debt and equity capital. In fact, while many of...

Application Applying Accounting Standards Managers must make decisions with respect to the financial reporting necessary to apply accounting standards. Consider the article ?Halliburton: Accounting...

Select an organisation with which you are familiar and write a report on how you would transform a clearly defined segment of the organisation into a sustainable business segment. Do not select an...

) Why is the mass of the earth important to maintain life as we know it? A) If the earth's mass were significantly different, we would be bombarded by cosmic rays that would strip away our...

\f\f\fChapter 2 Service Strategy Learning Objectives After completing this chapter, you should be able to: 1. Formulate a strategic service vision. 2. Describe how a service competes using the three...

A balanced three phase load of 30 MW is supplied at 132 kV, 50 Hz and 0.85 lag by means of a transmission line. The series impedance of a single conductor is (20+j40) ohms and the total phase-neutral...

A 100 W light bulb is left burning inside a Carnot refrigerator that draws 100 W. Can the refrigerator cool below room temperature?

Consider the pattern: 2 1x2x3 2 2 2x3x4 2 3 4 2 3x4x5 2 P(p+Ixp+2) P (i) Write down the 8th line in the pattern. (ii) Use the above pattern to find the value of 1 21 10 11 12 (iii) Find the value of...

A silicon thin film can be grown in the following three film deposition methods: Electron-beam evaporation with a small 10 cm? area Si source, the distance from the source to substrate is 5 cm and...

Philadelphia Fastener Corporation manufactures nails, screws, bolts, and other fasteners. Management is considering a proposal to acquire new material-handling equipment. The new equipment has the...

Ray Polo owns a variety store called Stars Forever. The following are purchases of inventory, returns, and discounts for the month of March. Mar. 2 Purchased $2,000 of merchandise from Sundance...

Valley View Inc., a U.S. corporation, formed a wholly owned Mexican corporation to conduct manufacturing and selling operations in Mexico. In its first year of operations, the Mexican corporation...

Why do you think so many politicians in the U.S. government continue to fight against access to free or low-cost birth control for women? Do you believe if there were more women in our government,...

6.86 The length of time, in seconds, that a computer user takes to read his or her e-mail is distributed as a lognormal random variable with = 1.8 and 2 = 4.0. (a) What is the probability that a...

1. The investment timing decision relates to: a. how long the cash flows last once a project is implemented. b. when a project should commence. c. how frequently the cash flows of a project occur. d....

If you invest $8,900 per period for the following number of periods, how much would you have in each of the following instances? Use Appendix C for an approximate answer, but calculate your final...

PYTHON Create a program that reverses the elements in a list. To do this, you will have to index each element in the list, starting from the end, and append it to a new, empty list. Write the program...