It is suggested, as an ECM, to replace a 7 kW motor with an efficiency of 87 % with a premium-efficiency motor with a rated full-load efficiency of 92 %. a. Determine the energy saving by this ECM, in kWh/year. b. Determine the simple payback period for this ECM in years. c. Conclude on the cost-effectiveness of this ECM. Assume that: • The cost of electricity is $0.12/kWh. • The differential cost of a premium versus standard motor is $350. • The average load factor of the motor is 0.75. • The average full-load operating hours of the motor are 5,000 hours/year.

It is suggested, as an ECM, to replace a 7 kW motor with an efficiency of 87 % with a premium-efficiency motor with a rated full-load efficiency of 92 %. a. Determine the energy saving by this ECM, in kWh/year. b. Determine the simple payback period for this ECM in years. c. Conclude on the cost-effectiveness of this ECM. Assume that: • The cost of electricity is $0.12/kWh. • The differential cost of a premium versus standard motor is $350. • The average load factor of the motor is 0.75. • The average full-load operating hours of the motor are 5,000 hours/year.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.31P: Consider two interconnected voltage sources connected by a line of impedance Z=jX, as shown in...

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