SDB Retreat Panel Session: Scalability Across the Building Stock
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Transcript of SDB Retreat Panel Session: Scalability Across the Building Stock
SDB Retreat Panel Session:Scalability Across the
Building Stock Randy Katz, Moderator
Arka BhattacharyaKaifei Chen
Stephen Dawson-Haggerty
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What is Scalability?
• “… ability of a system to handle a growing amount of work in a capable manner or its ability to be enlarged to accommodate that growth.”
• “An algorithm scales if it is suitably efficient and practical when applied to large situations.”
• If modeling the SECOND building is less work than modeling the first
2From wikipedia “Scalability”http://en.wikipedia.org/wiki/Scalability
Smart Buildings: How to Achieve Scale?
• Individual building deployments are Herculean efforts– Floorplans– Embedded system descriptions (lighting, HVAC, etc.)– Access to digital representations?
• Scale to millions of structures and 100s million of people?
• Automate the exploitation of existing information sources!
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U.S. Building Stock
• Residential Buildings– 128 million residential housing units in U.S. (2007);
7.188 million new housing units built 2009 – 2009• Commercial Buildings
– 4.9 million office buildings in the U.S. (2003); 170,000 commercial buildings constructed and 44,000 commercial buildings demolished per year (1995)
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Residential EnergyConsumption Survey
• 113.6 million occupied housing units in USA in 2009
• About 19,000 were selected for interviews
• Only about 15,300 were occupied primary residences and eligible
• About 12,100 responded to the survey, a response rate of about 79%
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Alternative Idea: Google Earth
• Crowd sourcing: Harness volunteer efforts to create Google SketchUp 3D building models
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SketchUp 3DWarehouse
From Street Views to … Inside Views
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Google Floor Plans
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From Street Views to
… Inside Views
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Conclusions• The Challenge: Achieving Scale
– Exploit crowd-sourcing• User generated 3D models and floor plans• Exemplar buildings and automated model building
– Exploit alternative information sources• Satellite and street-view photos• Digitized floor plans• Real-estate databases
• Making the information actionable: energy and other analytics– Liveability, Walkability, Transport Scoring– Localization/Indoor Mapping– Other social analytics