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GSA Early Concept Design Project – Energy Analysis

GSA Early Concept Design Project – Energy Analysis. Paola Sanguinetti Chuck Eastman Georgia Tech College of Architecture. Early Concept Design is a crucial early step for GSA project review. Example Early Concept Design. Lower Level. Model defined as :

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GSA Early Concept Design Project – Energy Analysis

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  1. GSA Early Concept Design Project – Energy Analysis Paola Sanguinetti Chuck Eastman Georgia Tech College of Architecture

  2. Early Concept Design is a crucial early step for GSA project review

  3. Example Early Concept Design Lower Level • Model defined as : • set of 3D space objects, carefully named • composed on slabs – also used for roof • exterior walls with no construction, percent glazing, with R-values, degree self-shading • Easily defined in all BIM design tools Level 1

  4. Revit Model Bentley Model ArchiCad Model Digital Project Model Project Purpose space program review simple energy load analysis circulation & security review common IFC file format provide significant automated feedback for early stage concept design cost estimate

  5. propose to use Energy+ with defaults. Would expect that defaults could be adjusted by energy consultant for later stages of design

  6. Energy Usage Analysis Module • ADDITIONAL INPUT DATA TO BE INCLUDED IN THE BIM • Building North Axis • Solar Distribution • Location (City & State) • Exterior Walls • Material • R-value • Fenestration • % of windows on each wall • ratio of width to length • Frame & mullion information • Material • Floors underground (or partially underground)

  7. Energy Usage Analysis Module • 2 ENERGY ANALYSIS SCENARIOS IN EARLY CONCEPT DESIGN: • 1 ZONE • Building modeled as a single thermal zone • 2 ZONE • Atrium or 2-story Lobby space • Will require different default for schedule and set point temperature • - Other spaces in the building as a single zone

  8. Mechanical Systems Narrative

  9. Purposes of Building Shell Energy Analysis Provide relative energy usage comparison for assessing different design concepts Siting, orientation and relative shading by different sources, effect of below grade parts of bldg. Building shape and exposure of building surfaces Building floor area to external skin area ratio Shading devices on exterior – if defined Significance of insulation of annual energy costs Significance of atriums, courtyards, other architectural features on energy use Building mass – use in energy capture and dissipation Natural lighting determined by depth of spaces Other items?

  10. Building Shell Energy Analysis We plan to replicate this report using Energy-Plus, with interface to the model. Will allow default parameter management by experienced E+ users. Using an efficiency factor, should just turn these figures into energy usage/yr.

  11. Mechanical Systems Analysis Not sure what calculations to do about mechanical system performance. we propose to default these factors, except in exceptional projects

  12. FOR EACH ALTERNATIVE LAYOUT, IDENTIFY THE DIFFERENCES IN ENERGY REQUIREMENTS Provide separate energy analysis for each orientation on site. Building Cooling Load Building Heating load MECHANICAL SYSTEMS 247 Tons 3554MBH Building Cooling Load Building Heating load MECHANICAL SYSTEMS 215 Tons 2984MBH Building Cooling Load Building Heating load MECHANICAL SYSTEMS

  13. Thank you, The Georgia Tech Team

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