Question: A 75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is replaced by a high-efficiency 75-hp motor that has

A 75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is replaced by a high-efficiency 75-hp motor that has an efficiency of 95.4 percent. Determine the reduction in the heat gain of the room due to higher efficiency under full-load conditions.

Step by Step Solution

★★★★★

3.40 Rating (172 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

An electric car is powered by an electric motor mounted in the en... 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)

E-ME-T (1183).docx

120 KBs Word File

Students Have Also Explored These Related Mechanical Engineering Questions!

A typical electric water heater has an efficiency of 95 percent and costs $350 a year to operate at a unit cost of electricity of $0.11/kWh. A typical heat pump-powered water heater has a COP of 3.3...

A reversible heat engine has an efficiency of 33.3%, removing heat from a hot reservoir and rejecting heat to a cold reservoir at 0C. If the engine now operates in reverse, how long would it take to...

Consider a molecular motor that has an efficiency of 50%. Find the maximum force the motor can produce. Assume a step size of 4 nm. Also assume the energy consumed for each step is 5 10 20 J (as...

An exercise room has six weight-lifting machines that have no motors and seven treadmills each equipped with a 2.5-hp (shaft output) motor. The motors operate at an average load factor of 0.7, at...

A 36 kW (shaft output) motor is available to run a noncooled compressor for carbon dioxide. The pressure is to be increased from 100 kPa to 150 kPa. If the compressor is 60% efficient, calculate the...

bbexplain all answers in all parts Problem 4 (Conservation of Angular Momentum) A meteor of mass m = 2.1 1013 kg is approaching earth as shown on the sketch. The radius of the earth is r = 6.37 106 m...

The Maxon 18-Watt permanent magnet DC motor used in the lab exercises has the following parameters: 1. Maximum Power: 18W 1. Maximum voltage: +15V 2. Torque Constant: 0.0502 Nm/A 2. Maximum...

MEE 421 - Assignmen... Due: 20.11.2023 Question 1 MULUNGUSHI UNIVERSITY SCHOOL OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING MEE 421 - ASSIGNMENT 2 60 Marks An open-belt drive connects two...

Consider the induction motor of Problem 6.10. a. Find the motor speed in r/min corresponding to the rated shaft output power of 25 kW. b. Similarly, find the speed in r/min at which the motor will...

A three phase, 4 4 0 V ( line to line ) , 6 0 Hz , Y - connected, 8 poles 1 0 0 hp induction motor has the following equivalent circuit parameters expressed in Ohms per phase referred to the stator:...

Let?s consider a cylindrical bar or rod that has a Young's modulus of 1 pa. For now, let's assume we can model the part in one-dimension, like we have been doing in class. Assume also that a finite...

Harrison Forklift's pension expense includes a service cost of $27 million. Harrison began the year with a pension liability of $47 million (underfunded pension plan). 1. Interest cost, $8; expected...

Which type of risk refers to when prices increase? Inflation risk Business risk Interest rate risk Liquidity risk

The application of the acquisition method depends upon the particular structure of the business combination (BC). Answer the questions in the answer booklet for the ?takeover? type BC and the...

Let y=f(x)y=f(x) be given by the graph below. a) Sketch the graph of y=f(3x)-2y=f(3x)2. Label at least 3 points on the graph. State the new domain and range of y=f(3x)-2y=f(3x)2. b) On a separate...

On most state highways, the fine for speeding depends on the speed of the car. In a certain state, suppose the fine as a function of the number of miles per hour over the speed limit is f(n).f(n)....

Small World Advertising is an advertising and public relations agency located in Portland, Oregon. This small ad agency, whose mission is to help for-profit socially oriented ventures achieve success...

Donald Dudley and Webster Dudley are local real estate developers. (a) A corporation might obtain the land and some period of time may elapse between the acquisition and the commencement of...

Complete the following questions based on how you think and act in a typical work situation. For each item, circle the number that best describes you. A single change that improves things 30 percent...

Principal Varimax Component Rotated Loadings Loadings Variables f1 f2 f1 f2 Communalities, h? y1 0.039 0.989 0.025 0.990 0.981 y2 0.889 0.268 0.893 0.256 0.863 y3 0.893 -0.158 0.891 -0.170 0.822 y4...

a. What is the expected return on a portfolio that is equally invested in the two assets? b If a portfolio of the two assets has a beta of .64, what are the portfolio weights? c. If a portfolio of...

What is the default storage class for any function Pick ONE option C ) Static C ) ) Extern O Auto o Register Clear Selection