8. Two electric motors are being evaluated for an automated paint booth application. Each motor have an output of 10 horsepower. It is estimated that the booth will be operated at an average of 8 hours per day for 250 days per year. MARR is 12% per year before taxes and the machine must return the capital in 5 years. Motor A costs P68,000 and has a guaranteed efficiency of 85% at the indicated operating load. Motor B costs P56,000 and has a guaranteed efficiency of 80% at the same operating load. Electric energy costs P 6.80 per kilowatt-hour and 1hp = 0.746kW. Determine the annual cost of electric energy in operating motor A.

8. Two electric motors are being evaluated for an automated paint booth application. Each motor have an output of 10 horsepower. It is estimated that the booth will be operated at an average of 8 hours per day for 250 days per year. MARR is 12% per year before taxes and the machine must return the capital in 5 years. Motor A costs P68,000 and has a guaranteed efficiency of 85% at the indicated operating load. Motor B costs P56,000 and has a guaranteed efficiency of 80% at the same operating load. Electric energy costs P 6.80 per kilowatt-hour and 1hp = 0.746kW. Determine the annual cost of electric energy in operating motor A.

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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