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      ECOLOGICAL PAYBACK TIME OF AN ENERGY-EFFICIENT MODULAR BUILDING

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          Abstract

          Ecological payback time was calculated for demolishing an existing commercial building with average energy performance and replacing it with an energy-efficient, prefabricated building. A life-cycle assessment was performed for a 5,000 ft 2 commercial building designed by Project Frog and prefabricated in San Francisco, California, and compared to the impacts of annual energy consumption and continued status quo operation of a comparable average commercial building. Scenarios were run both with and without rooftop solar panels intended to make the prefabricated building net zero energy. The analysis considers the materials and manufacturing, transportation, annual energy use of the new building, and disposal of the existing building, compared to continued annual energy use of the existing building. The carbon payback of a new building with no solar against operation of an existing commercial building was found to be roughly eleven years, and a building with enough rooftop solar to be net zero energy was roughly 6.5 years. The full EcoIndicator99 environmental impact payback for a new efficient building with no solar was found to be twenty years, and a solar net-zero building was roughly eleven years against operation of an existing commercial building.

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          Most cited references 39

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          Life cycle energy and environmental performance of a new university building: modeling challenges and design implications

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            Analysis of an information monitoring and diagnostic system to improve building operations

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              A review of transparent insulation systems and the evaluation of payback period for building applications

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                Author and article information

                Journal
                jgrb
                Journal of Green Building
                College Publishing
                1552-6100
                1943-4618
                1943-4618
                Winter 2012
                : 7
                : 1
                : 100-119
                Author notes

                1Principal, Faludi Design and Lecturer, Joint Program in Design, Stanford University. 660 4th Street #321, San Francisco, CA 94107, jer@ 123456faludidesign.com .

                2Assistant Professor, Department of Civil and Environmental Engineering, Stanford University. 285B Yang and Yamazaki Energy and Environment Building, 473 Via Ortega, Stanford, CA 94305-4020, mlepech@ 123456stanford.edu .

                Article
                jgb.7.1.100
                10.3992/jgb.7.1.100
                ©2012 by College Publishing. All rights reserved.

                Volumes 1-7 of JOGB are open access and do not require permission for use, though proper citation should be given. To view the licenses, visit https://creativecommons.org/licenses/by-nc/4.0/

                Page count
                Pages: 20
                Product
                Categories
                RESEARCH ARTICLES

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