Engineering Economy, Student Value Edition (17th Edition)
Engineering Economy, Student Value Edition (17th Edition)
17th Edition
ISBN: 9780134838137
Author: William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
Publisher: PEARSON
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Chapter 10, Problem 4P

A retrofitted space-heating system is being considered for a small office building. The system can be purchased and installed for $120,000, and it will save an estimated 300,000 kilowatt-hours (kWh) of electric power each year over a six-year period. A kilowatt-hour of electricity costs $0.10, and the company uses a MARR of 15% per year in its economic evaluations of refurbished systems. The market value of the system will be $8,000 at the end of six years, and additional annual operating and maintenance expenses are negligible. Use the benefit-cost method to make a recommendation.

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The International Parcel Service has installed a new radio frequency identification system to help reduce the number of packages that are incorrectly delivered. The capital investment in the system is $101,193 and the projected annual savings are estimated to start at $15,000 at EOY 1 and grow by 20% each year thereafter. The system's market value at the EOY 10 is $10,000, and the MARR is 18% per year, compounded weekly. What year will the FC be recovered? ΕΟΥ
A retrofitted space-heating system is being considered for a small office building. The system can be purchased and installed for $95,000, and it will save an estimated 150,000 kilowatt-hours (kWh) of electric power each year over a seven-year period. A kilowatt-hour of electricity costs $0.12, and the company uses a MARR of 12% per year in its economic evaluations of refurbished systems. The market value of the system will be $19,000 at the end of seven years, and additional operating and maintenance expenses are $10,500 per year. Use the benefit-cost method to make a recommendation. Click the icon to view the interest and annuity table for discrete compounding when the MARR is 12per year. The conventional B-C ratio of the system is 1.48. (Round to two decimal places.) This B-C ratio indicates that the project is not acceptable.
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