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GSA BIM Guide Series 05 GSA BIM Guide Series 05 www.gsa.gov/bim U.S. General Services Administration Public Buildings Service March 2012 This version of the “GSA Building Information Modeling Guide Series 05 – Energy Performance is identified as Version 2.0. With its publication, a GSA BIM Guide pertaining to energy performance becomes available publicly for review and comment. It will continue to serve as the basis for further development, pilot validation, and professional editing. All readers of this provisional guide are encouraged to submit feedback to the National 3D-4D-BIM Program. Updated versions will continue to be issued to address and incorporate on-going feedback in an open and collaborative process. Currently, the following Series: GSA Building Information Modeling Guide Series 01 – 3D-4D-BIM Overview GSA Building Information Modeling Guide Series 02 – Spatial Program Validation GSA Building Information Modeling Guide Series 03 – 3D Imaging GSA Building Information Modeling Guide Series 04 – 4D Phasing GSA Building Information Modeling Guide Series 05 – Energy Performance and Operations GSA Building Information Modeling Guide Series 06 – Circulation and Security Validation GSA Building Information Modeling Guide Series 07 – Building Elements GSA Building Information Modeling Guide Series 08 – Facility Management are available for download, review, and comment. For further information about GSA’s National 3D-4D-BIM Program, to download BIM Guide Series, or to submit comments or questions, please visit http://www.gsa.gov/bim. The National 3D-4D-BIM Program Public Buildings Service U.S. General Services Administration 1800 F Street NW, Suite 3300 Washington, DC 20405 GSA BIM Guide Series 05 www.gsa.gov/bim @ GSA BIM Guide for Energy Performance GSA BIM Guide Series 05 www.gsa.gov/bim GSA BIM Guide Series 05 www.gsa.gov/bim GSA Building Information Modeling Guide Series 05 - GSA BIM Guide for Energy Performance Version 2.0 — March 2012 United States General Services Administration (GSA) Public Buildings Service (PBS) Office of Design and Construction (ODC) i Table of Contents GSA BIM Guide Series 05 www.gsa.gov/bim Table of Contents BIM Guide 05: Energy Performance Foreword: ...............................................................................................................vi Introduction: Energy Performance ................................................................................. 7 1 Energy Modeling for Design, Construction, and Operations ............................................ 9 1.1 Overview..........................................................................................................9 1.1.1 Energy Modeling - A Background .....................................................................9 1.1.2 The Decision-Making Process ....................................................................... 11 1.1.3 Traditional Energy Modeling vs. BIM-Based Energy Modeling ................................. 12 1.1.4 Opportunities ......................................................................................... 13 1.1.5 Feasibility ............................................................................................. 14 1.1.5.1 Overview ................................................................................... 14 1.1.5.2 Project Team .............................................................................. 15 1.1.5.3 Budget/Schedule .......................................................................... 15 1.1.5.4 Scope and Detail .......................................................................... 16 1.1.5.5 Technology ................................................................................. 19 1.2 Preliminary Concept Design ................................................................................. 19 1.3 Final Concept Design.......................................................................................... 20 1.4 Design Development .......................................................................................... 21 1.5 Construction Documents ..................................................................................... 22 1.6 Construction .................................................................................................... 22 1.7 Operations ...................................................................................................... 23 2 Energy Modeling and BIM......................................................................................24 ii Table of Contents GSA BIM Guide Series 05 www.gsa.gov/bim 2.1 Leveraging BIM Data for Energy Modeling ................................................................. 24 2.2 Data Schemas for Building Information Exchange ........................................................ 25 2.2.1 Current Data Schemas ............................................................................... 25 2.2.1.1 IFC........................................................................................... 25 2.2.1.2 XML.......................................................................................... 25 2.2.1.2.1 gbXML ........................................................................... 26 2.2.1.2.2 ifcXML .......................................................................... 26 2.2.1.3 Open Standard Building Analysis Tools ................................................ 27 2.2.1.3.1 Simergy ......................................................................... 27 2.3 Zone-Based Modeling vs. Space-Based Modeling ......................................................... 27 2.3.1 Thermal Zones ........................................................................................ 27 2.3.2 Zone-Based Modeling ................................................................................ 28 2.3.3 Space-Based Modeling ............................................................................... 28 2.4 BIM Data Exchange with Energy Models .................................................................... 29 2.4.1 Geometric Data....................................................................................... 29 2.4.1.1 Benefits ..................................................................................... 29 2.4.1.2 Limitations ................................................................................. 29 2.4.1.3 Recommended Future Developments .................................................. 31 2.4.2 Construction/Material Data ........................................................................ 31 2.4.2.1 Benefits ..................................................................................... 31 2.4.2.2 Limitations ................................................................................. 31 2.4.2.3 Recommended Future Developments .................................................. 32 2.4.3 Mechanical Data ...................................................................................... 32 2.4.3.1 HVAC Equipment .......................................................................... 32 2.4.3.1.1 Benefits ........................................................................ 32 2.4.3.1.2 Limitations ..................................................................... 32 2.4.3.1.3 Recommended Future Developments ..................................... 33 2.4.3.2 Lighting, Occupant, and Equipment Loads ........................................... 33 iii Table of Contents GSA BIM Guide Series 05 www.gsa.gov/bim 2.4.3.2.1 Benefits ........................................................................ 33 2.4.3.2.2 Limitations ..................................................................... 33 2.4.3.2.3 Recommended Future Developments ..................................... 34 2.4.3.3 Spatial Data ................................................................................ 34 2.4.3.3.1 Benefits ........................................................................ 34 2.4.3.3.2 Limitations ..................................................................... 34 2.4.3.3.3 Recommended Future Developments ..................................... 34 2.5 BIM Building Elements and Spaces .......................................................................... 35 2.5.1 Building Elements for Design ....................................................................... 35 2.5.1.1 Walls ........................................................................................ 36 2.5.1.1.1 Windows ........................................................................ 37 2.5.1.1.2 Curtain Walls .................................................................. 37 2.5.1.1.3 Doors............................................................................ 39 2.5.1.2 Slabs/Floors ................................................................................ 39 2.5.1.3 Roofs/Ceilings ............................................................................. 39 2.5.1.4 Columns .................................................................................... 39 2.5.1.5 Shading Devices ........................................................................... 40 2.5.2 Spaces/Rooms/Zones ................................................................................ 40 2.5.2.1 Required Spatial Information for all Projects ........................................ 41 2.5.2.2 Unoccupied or “Cavity” spaces ......................................................... 41 2.5.2.3 Space Height and Plenums .............................................................
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