Méndez Echenagucia, T., Moroseos, T., & Meek, C. (2023). On the Tradeoffs between Embodied and Operational Carbon in Building Envelope Design: The Impact of Local Climates and Energy Grids. Energy and Buildings, 238.
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Abstract
Embodied and operational carbon tradeoffs in building envelopes are studied. • Envelope variables include wall assemblies, WWRs, glazing and shading. • Energy decarbonization models are used to determine the 30-year operational carbon. • Results show the importance of a total carbon approach to envelope design. • Over or under insulation can result in waste of 10–150 kgCO 2 e/m2. The building envelope has a substantial influence on a building's life cycle operational and embodied carbon emissions. Window-to-wall ratios, wall assemblies, shading and glazing types, have been shown to have a significant impact on total emissions. This paper provides building designers, owners, and policy makers with actionable guidance and a prioritization framework for establishing co-optimized lifecycle carbon performance of facade assembly components in a broad spectrum of climate contexts and energy carbon intensities. A large parametric study of building envelopes is conducted using building performance simulation and cradle-to-gate embodied carbon calculations in 6 US cities. The authors derive the total carbon emissions optimization for commercial office and residential space types using standard code-reference models and open-source lifecycle data. Comparisons between optimal total carbon solutions and (i) optimal operational carbon and (ii) minimum required assemblies, show the impact of under and over investing in envelope-related efficiency measures for each climate. Results show how the relationship between embodied and operational carbon is highly localized, that optimal design variables can vary significantly. In low carbon intensity energy grids, over investment in envelope embodied carbon can exceed as 10 kgCO 2 e/m2, while under investment in high carbon intensity grids can be higher than 150 kgCO 2 e/m2.
Keywords
Building performance simulation; Embodied carbon; Operational carbon; Parametric modeling
Echenagucia, Tomas Mendez; Moroseos, Teresa; Meek, Christopher. (2023). On the Tradeoffs between Embodied and Operational Carbon in Building Envelope Design: The Impact of Local Climates and Energy Grids. Energy & Buildings, 278.
View Publication
Abstract
The building envelope has a substantial influence on a building's life cycle operational and embodied car-bon emissions. Window-to-wall ratios, wall assemblies, shading and glazing types, have been shown to have a significant impact on total emissions. This paper provides building designers, owners, and policy makers with actionable guidance and a prioritization framework for establishing co-optimized lifecycle carbon performance of facade assembly components in a broad spectrum of climate contexts and energy carbon intensities. A large parametric study of building envelopes is conducted using building perfor-mance simulation and cradle-to-gate embodied carbon calculations in 6 US cities. The authors derive the total carbon emissions optimization for commercial office and residential space types using standard code-reference models and open-source lifecycle data. Comparisons between optimal total carbon solu-tions and (i) optimal operational carbon and (ii) minimum required assemblies, show the impact of under and over investing in envelope-related efficiency measures for each climate. Results show how the rela-tionship between embodied and operational carbon is highly localized, that optimal design variables can vary significantly. In low carbon intensity energy grids, over investment in envelope embodied carbon can exceed as 10 kgCO2e/m2, while under investment in high carbon intensity grids can be higher than 150 kgCO2e/m2.Published by Elsevier B.V.
Keywords
Facades; Building-integrated Photovoltaic Systems; Carbon Emissions; Carbon; Building Performance; Building Designers; Building Envelopes; Refuse Containers; Building Performance Simulation; Embodied Carbon; Operational Carbon; Parametric Modeling; Environmental-impact; Search
Launching the Inspire Fund: An early step for CBE’s Office of Research “For a small college, CBE has a broad range of research paradigms, from history and arts, to social science and engineering.” — Carrie Sturts Dossick, Associate Dean of Research Upon taking on the role of Associate Dean of Research, Carrie Sturts Dossick, professor in the Department of Construction Management, undertook listening sessions to learn about the research needs of faculty, staff and students across the College of Built…
ARPA-E announced $5 million in funding to two universities—the University of Washington and University of California, Davis—working to develop life cycle assessment tools and frameworks associated with transforming buildings into net carbon storage structures. The funding is part of the Harnessing Emissions into Structures Taking Inputs from the Atmosphere (HESTIA) Exploratory Topic. Parametric Open Data for Life Cycle Assessment (POD | LCA) – $3,744,303 The University of Washington’s Carbon Leadership Forum will develop a rigorous and flexible parametric Life Cycle Assessment (LCA)…
Teresa Moroseos is a Post-Doctoral Scholar at the Integrated Design Lab (IDL) in the University of Washington’s College of Built Environments. In this role, she provides daylighting and energy performance analysis for projects throughout the United States. She collaborates with design teams to find solutions that respond to the environment and maintain design intent, determines appropriate metrics of evaluation, and performs daylight and energy simulations. Teresa also conducts research related to building performance.
Teresa has a background in engineering, architecture, and academics, and enjoys combining the computational aspect of daylight and energy analysis with the qualitative aspect of design in her work. Prior to working at the IDL, she worked as a designer at a Seattle architecture office, where she worked on civic buildings from schematic design to construction administration. Teresa has also taught undergraduate students at the University of Washington in topics of climate analysis, energy principals for buildings, passive solar design, and daylight simulations.
The Integrated Design Lab (IDL) is operated by the Department of Architecture in the College of Built Environments at the University of Washington. IDL’s mission is to discover solutions that overcome the most difficult building performance barriers, and to meet the building industry’s goals of moving towards radically higher performing buildings and healthy urban environments. The IDL advances their mission through interconnected research, technical assistance, and professional educational and tour programs.
The Integrated Design Lab carries out research to advance knowledge and policies that support the healthiest and highest performing buildings and cities. It measures and analyzes modeled and actual building performance data so as to influence the building industry’s understanding of how to radically improve the design and operation performance of buildings. The performance research includes energy efficiency, daylighting, electric lighting, occupant energy use behavior, human health and productivity in buildings, and advanced building management systems.
The Integrated Design Lab connects its discoveries and the transformative knowledge of others to the building industry and public through education. These offerings include classes, workshops, focus-group meetings, leadership forums, and exhibits of breakthrough technologies intended to transform the market for the highest performing buildings by reaching out and educating current and future leaders on meeting 21st century building performance challenges with the knowledge and policies that favor renewable and regenerative buildings, neighborhoods and cities.
The IDL is a self-sustaining organization that includes interdisciplinary faculty, staff, students, professional collaborators, and partner organizations.
The University of Washington Center for Integrated Design (CID) promotes a healthy, energy efficient built environment through research, education and outreach initiatives.
The University of Washington Center for Integrated Design includes the Integrated Design Lab (IDL), the Discovery Commons, and the Carbon Leadership Forum (CLF). The Center’s mission is to advance the highest performing built environment that better serves environmental and human health through research, technical assistance, education and outreach. The Center is anchored by the Integrated Design Lab which delivers its mission through the three core services of: discovery through research; guidance through technical assistance; and advocacy through education and outreach.
The Center and the Integrated Design Lab are supported by the Northwest Energy Efficiency Alliance (NEEA), the U.S. Department of Energy (US DOE), The National Science Foundation (NSF), The UW Campus Sustainability Fund, Puget Sound Energy, AIA Seattle, The Bullitt Foundation, and innovative building owners, designers, and operators in the Pacific Northwest region and nationally.
Operating out of its own ‘living laboratory’, the Center is a self-sustaining service located at the Bullitt Center in Seattle, WA– the greenest commercial building in the world.