An energy audit of the roof indicates the following: It is proposed to add R-19 insulation in

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An energy audit of the roof indicates the following: image text in transcribed

It is proposed to add R-19 insulation in the roof.

a. Comment on the potential energy savings of adding insulation.

b. If the insulation costs $0.35/ft², determine the payback of adding insulation.

c. Is the expenditure on the additional insulation justified based on a minimum rate of return of 12 percent? Assume a 30-year life cycle. Solve the problem using both the present worth and annual cost methods.

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Energy Audit Of Building Systems An Engineering Approach

ISBN: 9780367820466

3rd Edition

Authors: Moncef Krarti

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Question Posted: Feb 07, 2024 01:49 PM

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An energy audit of the roof indicates the following: It is proposed to add R-19 insulation in

Question:

Roof area Existing roof R-value Degree-days (winter) Degrees-hours (summer) Fuel cost Boiler efficiency Electric rate Air-condition requirement 10,000 ft 5 6,000 17,000 $4/MMBtu 0.70 $0.07/kWh 0.7 kW/ton

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Energy Audit Of Building Systems An Engineering Approach

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