American Canyon High School

Transcription

1 American Canyon High School A Case Study in using BIM for Sustainable Design

2 Sustainable Design Philosophy Sustainable Design is not a separate effort, it is an integral part of the design process for every project. Consider the environment in every design decision with the same importance as the program and the budget.

3 American Canyon High School 2200 Students 260,000 s.f. 50 Acres 2500 seat Gymnasium 400 seat Theater 4 Small Learning Communities 5 Career Pathway Centers Aquatic Center Outdoor Athletic Facilities

4 American Canyon High School Arial View from Northwest

5 American Canyon High School Theater and Administration Entries

6 Library and Multi-Use Entries from Campus Green

7 American Canyon High School Main Classroom Building and Campus Green

8 Green Design Daylighting All Classrooms designed to provide balanced daylight Sunshades, clerestories, daylighting glazing, skylights and many window configurations are used to provide balanced daylight in a variety of conditions. Controls dim lights when daylight is available. Ventilation Upper and Lower operable windows provided in all classrooms. Library and Theater use Displacement Ventilation. Gymnasium is cooled through Natural Ventilation. Sustainable Materials Materials with Recycled Content: Carpet, Metal Roofing, Insulation, Wheel Stops, Landscape Mulch, Steel, High Fly Ash Concrete Materials with Rapidly Renewable Content: Cork Faced Wall Panels, Linoleum, Toilet Partitions Low Emitting Materials: Carpet, Paperless Gypsum Board, Linoleum, Formaldehyde Free Insulation, Low-VOC Paint

9 Green Systems 500 kw PV System Three Types: Crystalline, Thin-film and PV Glass Integrated into building design. Provides 25%+ of school s energy needs. Ground Loop Heat Pump Mechanical System The Geothermal Heat Pump system takes advantage of the constant temperature of the ground to help heat and cool the buildings. Heat is transferred to and from the ground through a closed-loop system. High Efficiency and Low energy use Long lifespan and Low Maintenance More Architectural Flexibility Lower noise from mechanical units. Water Conservation Reclaimed water for irrigation Low flow faucets and showers Waterless Urinals Dual-flush Toilets Stormwater management featuring Bioswales and Retention Ponds

10 CHPS Verified Scorecard Summary First CHPS Verified School: 43 Points Total Sustainable Sites: 8 Points out of 14 Joint-use of Facilities, Stormwater filtration, cool roofs, bicycle parking Water: 5 Points out of 5 Reclaimed water for irrigation, dual flush toilets, waterless urinals and low flow fixtures Energy: 18 Points out of kW PV system, thermally and energy efficient design, enhanced commissioning Materials: 3 Points out of 12 75% Construction Waste Recycling, Recycled materials, rapidly renewable materials Indoor Environmental Quality: 12 Points out of 20 Daylighting, View Windows, high performance lighting, low emitting materials, improved acoustic performance. Policy and Operations: 0 Points

11 3 Design Decisions helped by BIM Site Design Sun Shade Design Daylighting

12 BIM Design Process Schematic Concept Sketch, rough ArchiCAD Model, Sketchup, etc. Developed Concept ArchiCAD Model Analyze and Verify 3 rd party BIM applications (Ecotect, Google Earth, etc.) ArchiCAD tools. Final Design

13 Site Design

14 Existing Views Views to the adjacent hills and across the bay to Mt. Tamalpais were prominent features of the site.

15 Conceptual Site Design Campus buildings organized around an elliptical path around the Library/Admin building and the Campus Green Prominent view corridors to the southwest and southeast from the Campus Green and Plaza.

16 Using Google Earth to Analyze Sight Lines Google Earth Connections Add-on for ArchiCAD provides a direct import-export connection between ArchiCAD and Google Earth.

17 Project Context

18 Project Context

19 View of Adjacent Hills

20 View of Mt. Tamalpais

21 Sun Shade Design

22 Schematic Shading Concepts Covered balconies on South, East and West sides of Classroom buildings. Typical Window design with interior light shelf and exterior sunshade. Daylit Corridors and Lobbies with sun control.

23 Developed Shading Concepts Exterior sun shade/light shelf and translucent daylighting glass in the transom.

24 Sun Shade Analysis in Ecotect Solar Tool The Solar Tool is an external program used to analyze schematic window shading designs.

25 Basic Shadow Display

26 Shading Diagram

27 Shading Animations for One Day

28 Shading Animations for One Time Throughout the Year

29 Comparing 3 Sunshade Options

30 Shadow Animations in ArchiCAD

31 Shadow Animations in ArchiCAD

32 Daylighting

33 Schematic Daylighting Concepts Building Orientation to provide balanced light and as many north and south windows in each classroom. Skylights and Clerestory windows to provide light to corridors and lobbies.

34 Developed Daylighting Concepts Exterior sun shade/light shelf and translucent daylighting glass in the transom.

35 Daylighting Analysis in Ecotect Classroom in Question: Second Floor Classroom with windows on South, East and west sides and clerestory windows on the north side.

36 ArchiCAD to Ecotect Process Export gbxml file from ArchiCAD using add-on gbxml is an independent exchange format for building model information that exports a thermal model from ArchiCAD. Open gbxml file in Ecotect Make some adjustments to the model in Ecotect Run a variety of Ecotect analysis modules on the model

37 Sun path analysis of exterior light shelf

38 Daylighting Analysis: Daylight Levels

39 Daylighting Analysis: Daylight Factor

40 Internally Reflected Component of Daylight Factor

41 Externally Reflected Component of Daylight Factor

42 Direct Component of Daylight Factor

43 Shadow Animations March 19th May 19th

44 Thanks to QKA Team: Anna Wells,Barry Power, Bryan Chubb, Cam Hawing, Chris Scofield, Dan Malone, Jeff Howe, Jon Stong, Lyanne Schuster, Maria Thomas, and Shama Odenburg. Consultant Team: ZFA Structural Engineers, Costa Engineers, O Mahony & Meyer, The Shalleck Collaborative, Chaudhary Associates, Gretchen Stranzl McCann Landscape Architect, Monk and Associates, Kleinfelder, Green Building Studio, Architectural Energy Corporation, Counselman Hunsaker, Ballinger Kitchen Design, Lohden Steele, Excelize, Inc.