It is assumed that there is a building of 100 square meters with a door &window area of about 30 square meters. The heat protection performanceof high-performance doors & windows is better than that of ordinary doors& windows.Assumptions 1: If turn on the air conditioner, the power consumption ofusing ordinary doors & windows is 30 kWh/day; while the powerconsumption of using high-performance doors & windows is 25 kWh/day.Assumptions 2: The electricity price is 0.1 $/kWh.Assumptions 3: The investment cost of ordinary doors & windows andhigh-performance doors & windows is 200 $/m2 and 150 $/m2,respectively.Questions: How much is the cost saved by using high-performance doorsand windows for each year? What is the payback period of investing high-performance doors & windows?

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Answered: Questions: How much is the cost saved…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Multiple Choice Assume that a company is considering purchasing a machine for $45,000 that will have a five-year useful life and no salvage value. The machine will lower operating costs by $17,000 per year. The company's required rate of return is 18%. The profitability index for this investment is closest to: Click here to view Exhibit 12B-1 and Exhibit 12B-2, to determine the appropriate discount factor(s) using the tables provided. 0.85. ○ 1.14. ○ 1.18. о 1.24.
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Questions: How much is the cost saved by using high-performance doors and windows for each year? What is the payback period of investing high- performance doors & windows?