6. A 20 HP motor operates at full load for 7,000 hours each year at an efficiency of 91%. It is replaced by a new 20 HP motor with an efficiency of 93%. What is the annual energy savings achieved by installing the new motor? a. 2,206 kWh b. 2,520 kwh c. 2,840 kwh d. 3,308 kwh

6. A 20 HP motor operates at full load for 7,000 hours each year at an efficiency of 91%. It is replaced by a new 20 HP motor with an efficiency of 93%. What is the annual energy savings achieved by installing the new motor? a. 2,206 kWh b. 2,520 kwh c. 2,840 kwh d. 3,308 kwh

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter27: Service-entrance Equipment

Section: Chapter Questions

Problem 32R

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Concept explainers

Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.

Question

6. A 20 HP motor operates at full load for 7,000 hours each year at an efficiency of 91%. It is
replaced by a new 20 HP motor with an efficiency of 93%. What is the annual energy savings
achieved by installing the new motor?
a. 2,206 kWh
b.
2,520 kwh
c. 2,840 kwh
d. 3,308 kwh

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