Water is being pumped from a large lake to a reservoir 25 m above at a rate of 25 L/s by a 10-kW (shaft) pump. If the irreversible head loss of the piping system is 5 m, determine the mechanical efficiency of the pump. prove the answer: 73.6 percent

Water is being pumped from a large lake to a reservoir 25 m above at a rate of 25 L/s by a 10-kW (shaft) pump. If the irreversible head loss of the piping system is 5 m, determine the mechanical efficiency of the pump. prove the answer: 73.6 percent

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter44: Geothermal Heat Pumps

Section: Chapter Questions

Problem 1RQ: Geothermal heat pumps, or water-source heat pumps, are classified as either _____loop or _____loop...

See similar textbooks

Related questions

Q: A submersible pump with a shaft power of 10 kW and an efficiency of 80 percent is used to pump water…

A: As per given question we have determine the discharge rate of water and the pressure difference…

Q: What is mechanical efficiency? What does a mechanical efficiency of 100 percent mean for a hydraulic…

A: Mechanical efficiency: Mechanical efficiency is defined as the comparison of the energy at the inlet…

Q: What is the hydraulic grade line? How does it differ from the energy grade line? Under what…

A: Hydraulic grade line : As we know there are three loads in the Bernoulli’s equation we consider : 1.…

Q: Water is flowing through a 10-cm-diameter water pipe at a rate of 0.1 m3/s. Now a diffuser with an…

A: Given: The of pipe at the section of bolt, d = 10 cm The diameter of the pipe at the exit, D = 20 cm…

Q: Water enters a hydraulic turbine through a 30-cm-diameter pipe at a rate of 1.1 m3/s and exits…

Q: Which of the following head is neglected in ideal Bernoulli's Energy equation 1. Head loss due…

A: Bernoulli's equation is nothing but another version of conservation of energy

Q: A 78-percent efficient 12-hp pump is pumping water from a lake to a nearby pool at a rate of 1.2…

A: The density of water is

Q: Water enters a hydraulic turbine through a 30-cm-diameter pipe at a rate of 0.7 m3/s and exits…

A: The given data is shown in the following attached image:

Q: A fireboat is to fight fires at coastal areas by drawing seawater with a density of 1030 kg/m^3…

Q: The electric power needs of a community are to be met by windmills with 40-m-diameter rotors. The…

Q: Underground water is to be pumped by a 78 percent efficient 5-kW submerged pump to a pool whose free…

A: (a) On using Bernoulli’s equation at point of intake and discharge, Now, it is written as

Q: Water enters a hydraulic turbine through a 35-cm-diameter pipe at a rate of 0.8 m3/s and exits…

A: Bernoulli's equation relates the pressure energy, kinetic energy and potential energy of a fluid…

Q: Underground water is to be pumped by a 78 percent efficient 5-kW submerged pump to a pool whose free…

A: Given Data: The efficiency of the pump is: η=70%. The input power is: Win=3 kW. The diameter of…

Q: A pump draws 20 kW of electrical power while pumping oil with a density of 780 kg/m^3 at a flow rate…

A: electric power = 20 kW Density = 780 kg/m^3 Flow rate = 0.3 m3/s Inlet diameter = 7 cm Outlet…

Q: Water is pumped from a lake to a storage tank 25 m above at a rate of 70 L's while consuming 22.4 kW…

A: Given data Water is pumped from a lake to a storage tank 25 m above at a rate of 70 L/s while…

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

A: Mass flow rate of water, m˙=900 kg/s Mechanical power output of Turbine, PT=800 kW Electric power…

Q: Water is pumped from a lower reservoir to a higher reservoir by a pump that provides 20 kW of shaft…

A: Step-1 Given: The power of the shaft is P=20 kW. The difference in the height of the reservoir is…

Q: Water enters a hydraulic turbine through a 30-cmdiameter pipe at a rate of 0.6 m3/s and exits…

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

A: Given, head , h = 25 m inner diameter, d = 3.75 flow rate, q = 45 litres per min = 0.00075 m3/s…

Q: 5-86 Water is pumped from a lower reservoir to a higher reservoir by a pump that provides 23 kW of…

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

Q: Underground water is being pumped into a pool whose cross section is 3 m × 4 m while water is…

A: Given: The length of the pool is l=3 m. The width of the pool is w=4 m. The average velocity of the…

Q: A large tank is initially filled with water 4 m above the center of a sharp-edged 10-cm-diameter…

A: Given, Height of the water in the tank, H= 4 m, Diameter of a orifice, d=10 cm= 0.1m, Head loss in…

Q: Consider a pipe that branches out into two parallel pipes and then rejoins at a junction downstream.…

A: Given: The diameter of the first pipe is d=2 cm. The diameter of the second pipe is D=4 cm. The flow…

Q: 2) Elev. 150.2 m Elev. 111.0 m D = 500 mm Pipe { L = 975 m e = 0.00030 m Pump Water

Q: Water enters a hydraulic turbine through a 30-cm-diameter pipe at a rate of 0.6 m3/s and exits…

A: Given data: The diameter of the entrance of the pipe, D1 = 30 cm. Flow rate of water, V = 0.6 m3/s.…

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

A: Given data, Elevation different between free surface and down stream is h= 120 m. mass flow rate is…

Q: Q.3) Water is pumped from a lower reservoir to a higher reservoir by a pump that provides 20 kW of…

A: Givenpower provided by pump to water P=20kWZ=45mhL=23m

Q: A 6-cm-diameter horizontal water pipe expands gradually to a 9-cm-diameter pipe. The walls of the…

A: Given data D1=6 cmD2=9 cmP1=150 KPaV1=150 m/s

Q: Consider a pipe that branches out into two parallel pipes and then rejoins at a junction downstream.…

A: Given Data: The length of both pipes is the same L1=L2. The friction factors of both pipes are the…

Q: An 80-percent-efficient pump with a power input of 30 hp is pumping water from a lake to a nearby…

Q: The water is to be pumped from the lower reservoir to the upper reservoir at a flow rate of 8 kg/s.…

A: Pump Pump is a hydraulic device which is used to lift liquid from low height to the high elevation.…

Q: Water is pumped from a lower reservoir to a higher reservoir by a pump that provides 23 kW of useful…

A: Given; Mechanical power by a pump, Pm=23 kW Head difference between reservoirs, H=57 m The flow rate…

Q: Consider a pipe that branches out into two parallel pipes and then rejoins at a junction downstream.…

A: It is known that if two pipes are connected in parallel , then the headloss in both will be the…

Q: Water is pumped from a lower reservoir to a higher reservoir by a pump that provides 20 kW of useful…

A: Pump power, P=20 kW Elevation difference between the two reservoir, ∆z=45 m Water flow rate, Q=0.03…

Q: In a hydroelectric power plant, water flows from an elevation of 400 ft to a turbine, where electric…

A: Given: Total head = 400 ft Head loss = 36 ft Net head = 400 - 36 = 364 ft =110.95 m

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: A water tank is attached to a piping system with a sharp edge inlet (KL=0.5). Determine the velocity…

A: Given: The length of the system, L = 10 m The diameter of the pipe, d = 1.5 cm The friction factor,…

Q: Electric power is to be generated by installing a hydraulic turbine–generator at a site 110 m below…

A: Given data The height of free surface water from the turbine is h=110 m. The mass flow rate is…

Q: An open water tank has two inlets and one outlet. The water flow rate through the two inlets are (…

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: Water flows at a rate of 0.035 m3/s in a horizontal pipe whose diameter is reduced from 15 cm to 8…

Q: In an hydroelectric plant, 100 m^3/s of water flows from elevation of 120 m to a turbine, where…

A: Given Data Q=100 m3/s H=120 m Eta=80%

Q: 8. An open water tank has two inlets and one outlet. The water flow rate through the two inlets are…

Q: Water is flowing through a 10-cm-diameter water pipe at a rate of 0.1 m3/s. Now a diffuser with an…

A: Solution: Given data: d = 10 cm D = 20 cm Q = 0.1 m3/s

Q: Water flows at a rate of 0.040 m3/s in a horizontal pipe whose diameter is reduced from 15 cm to 8…

Concept explainers

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.

Question

Include a free body diagram.

Branch of science that deals with the stationary and moving bodies under the influence of forces.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

In a hydroelectric power plant, water flows from an elevation of 400 ft to a turbine, where electric power is generated. For an overall turbine–generator efficiency of 85 percent, Determine the flow rate of water if the irreversible head loss of the piping system between the free surfaces of the inlet and the outlet is 36 ft.
A 73-percent efficient 12-hp pump is pumping water from a lake to a nearby pool at a rate of 1.2 ft3/s through a constant-diameter pipe. The free surface of the pool is 35 ft above that of the lake. Determine the irreversible head loss of the piping system, in ft, and the mechanical power used to overcome it.
In a hydroelectric power plant, 100 m3/s of water flows from an elevation of 120 m to a turbine, where electric power is generated . The total irreversible head loss in the piping system from point 1 to point 2 (excluding the turbine unit) is determined to be 35 m. If the overall efficiency of the turbine–generator is 80 percent, estimate the electric power output.
A large tank is initially filled with water 4 m above the center of a sharp-edged 10-cm-diameter orifice. The tank water surface is open to the atmosphere, and the orifice drains to the atmosphere. If the total irreversible head loss in the system is 0.2 m, determine the initial discharge velocity of water from the tank. Take the kinetic energy correction factor at the orifice to be 1.2.
What is mechanical efficiency? What does a mechanical efficiency of 100 percent mean for a hydraulic turbine?
Water enters a hydraulic turbine through a 30-cm-diameter pipe at a rate of 0.6 m3/s and exits through a 25-cm-diameter pipe. The pressure drop in the turbine is measured by a mercury manometer to be 1.2 m. For a combined turbine– generator efficiency of 83 percent, determine the net electric power output. Disregard the effect of the kinetic energy correction factors
A 78-percent efficient 12-hp pump is pumping water from a lake to a nearby pool at a rate of 1.7 ft3/s through a constant-diameter pipe. The free surface of the pool is 32 ft above that of the lake. Determine the irreversible head loss of the piping system, in ft, and the mechanical power used to overcome it. Take the density of water to be 62.4 lbm/ft3.
Underground water is to be pumped by a 78 percent efficient 5-kW submerged pump to a pool whose free surface is 30 m above the underground water level. The diameter of the pipe is 7 cm on the intake side and 5 cm on the discharge side. Determine the flow rate of water and the pressure difference across the pump if the irreversible head loss of the piping system is 4 m.
A submersible pump with a shaft power of 5 kW and an efficiency of 72 percent is used to pump water from a lake to a pool through a constant diameter pipe The free surface of the pool is 25 m above the free surface of the lake. If the irreversible head loss in the piping system is 4 m, determine the discharge rate of water and the pressure difference across the pump.
In an hydroelectric plant, 100 m^3/s of water flows from elevation of 120 m to a turbine, where electric power is generated. The overall efficiency of the turbine-generator is 80 percent Disregarding frictional losses in piping. Estimate the electric power output of this plant.
Water flows at a rate of 0.040 m3/s in a horizontal pipe whose diameter is reduced from 15 cm to 8 cm by a reducer. If the pressure at the centerline is measured to be 480 kPa and 440 kPa before and after the reducer, respectively, determine the irreversible head loss in the reducer. Take the kinetic energy correction factors to be 1.05.
An 80-percent-efficient pump with a power input of 20 hp is pumping water from a lake to a nearby pool at a rate of 1.5 ft3 /s through a constant-diameter pipe. The free surface of the pool is 80 ft above that of the lake. Determine the mechanical power used to overcome frictional effects in piping.