Lunch Keynote & Case Study

Transcription

1 Lunch Keynote & Case Study Berkeley W. Branch Library Gerard Lee, HMC Architects ACHIEVEMENT

2 WEST BERKELEY PUBLIC LIBRARY A Certified Zero Net Energy Building ZNE Workshop for Local Government December 9, 2016 Harley Ellis Devereaux Gerard Lee, AIA LEED AP BD+C - Project Architect/ Manager of West Berkeley Public Library while at Harley Ellis Devereaux (Oakland) Principal in Charge HMC Architects, Oakland

3 1 mile 20 min. walk 1/2 mile 10 min. walk West Berkeley Library David Wakely Photographer

4 1st Public Library in California/ Nationally -Certified Living Building Challenge Net Zero Energy 2016 AIA COTE Top Ten Award 2015 AIA East Bay Merit Design Award 2015 Gold Nugget ZNE Grand Award 2014 Berkeley Design Associates Merit Award 2015 IES Excellence in Illumination Award 2nd ZNE Municipal building in CA NZEB Certified! 3rd ZNE Municipal building in USA 8

5 City of Berkeley Climate Action Plan 2009 & Measure FF Berkeley Public Library Bond 2009 Climate Action Plan Adopted 33% CO2 reduction below 2000 level by % Reduction by 2050 LEED Silver for all construction and renovation $26M bond in 2008 for branch library improvements 9

6 1 mile 20 min. walk 1/2 mile 10 min. walk West Berkeley Library Site Location

7 Site Photos- Existing Building 11

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9 Annual Energy Consumption (kbtu/sf) Average kw Power Draw 6.0 Series9 5.0 Series8 4.0 Series6 3.0 Series4 Series7 Series5 Series3 Series2 2.0 Series Plug loads Baseline Existing Building Plug Load Analysis 13

10 Every hour, the sun radiates more energy onto the earth than the entire human population uses in one whole year. Solar Access Optimum Roof Height 14

11 Day Lighting Design Tools Floor Plan Overcast Sky JUNE 21 Analysis Grid Clear 1200 Falloffs Value Range: fc Daysim- annual daylighting analysis with weather data Radiance illuminance maps based on specific times Building Section Daysim was more user friendly in early design phases Daylight Modeling 15

12 Day Lighting Design Tools Sunny vs Overcast simulations 2:1 ratios Winter has 10x difference in light levels Finding the Balance between day light and artificial lighting is key /file/d/0b2ayx41akukqn VhqbFltQXZ3NzFBcEd4N 3JtN2lLSWRQRlpv/view? usp=sharing Daylight Modeling 16

13 Natural Ventilation Computational Fluid Dynamics (CFD) Studies Comfort verification studies by Capital Engineering/ SEED Inc. Fluent (Ansys Airpak) Various ceiling configurations and shapes were analyzed CFD analysis indicated - horizontal ceiling plane works as well as a sloped ceiling Comfort Verification Studies Additional CFD analysis was done during late design for verification purposes Natural Ventilation Analysis 17

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15 Zero Net Energy Features 19

16 Renewable On-site Energy Supply 20

17 Actual EUI 24.1 EUI Baseline Building (T24) 35 Title 24 modeled with EnergyPro Whole Building Simulation Energy Modeled with DesignBuilder Reduce building energy consumption before designing for renewables Whole Building Energy Analysis 21

18 Public Procurement Lessons Learned Public Low Bid Requirement Limited Number of GCs with ZNE Experience Collaborative Process PM/CM/PA/Builder/ Client Relationship is Crucial Educate, Collaborate and Develop Trust COMMUNICATION! Public Low Bid 22

19 3x8 wood 24 on center Wood is thermally efficient vs. steel stud 7 ¼ of wall cavity filled with rock wool insulation = R30 2 layers of Roxul in roof/ ceiling =R41 5 week lead time from Canada Good acoustics, high thermal & hygrothermal performance, fire protection, moisture & mold resistant and will not sag Roxul Rock Wool Insulation 97.1% FSC Wood content 23

20 Unseen But Important -Roof BOD -Performance requirements PV Sub -Install Of the Rack Systems Structural issues! Resolve Issues, Find Solutions and be ZNE Aware Integrated Designs Are Not Friendly Towards Field Changes Lessons In The Field 24

21 PV & Solar Thermal Do not exceed zoning height limitations Low slope roofs HED detailed for stanchions. Standard wood curbs preferred by subs can impede flow and affect collector plate angles Stanchions allow for future technology, reroofing, ease of maintenance. Lessons In The Field 25

22 Radiant Slab Triple Wall Radiant Tubing 4 of Radiant Concrete Slab over 2 of Rigid Insulation. 6 Curbs. Curb cutouts -manifolds & construction accesscherry pickers. Check manifold design & tubing layout for proper zoning Template Layout/ Protection plates -avoid punctures Educating the other subcontractors is KEY Radiant Floors 26

23 PV & Solar Thermal Learning curve Not your standard electrical/ mechanical room Plan for issues in the field where Design Build systems are concerned Lessons In The Field 27

24 Natural Ventilation Interior of chimney has to be lined with acoustic board Provide for access to service and maintain Patrons standard comment is How quiet the building is! CFD studies were worth it. Minimal comfort issues most addressed during commissioning Wind Chimney 28

25 Runtal Radiators Provides preheating of fresh air in the winter Standard Runtal heights are limited Worked with fabricator to increase fin spacing & revised pressure and flow design Runtal Radiators 29

26 Daylight Harvesting Daylight Sensors (1) at skylights & (1) at entry Tied to lighting panel and controls lights -dimmable vs on/off Dimmable lights need delay Shades affect sensors Commissioning is necessary to trouble shoot lighting Day Light & Lighting Controls 30 David Wakely Photographer

27 High Performance Rain Screen System 14 Week Lead time from Switzerland No comparable local product Arranged for contractor to obtain manufacturer certification Revised details to reduce steel furring use by 50% Reduced material use, errors, labor and possibility for breakage during installation Cement Composite Panel Rain Screen 31

28 1 x 6 Radiata pine siding impregnated with resin - FSC, mold and insect resistant, alternative to tropical hardwoods Rain screen system Dreamdex is restructuring - City purchased available stock at start of construction Worked with closely with contractor to avoid wastage DreamDex Wood Siding 32

29 1,744KWh excess energy annually Produces more energy than it uses Trending Data 33

30 47 year simple payback Costs Comparisons 34

31 Extensive Bioclimatic Studies & Energy Modeling -Critical Anticipate Changes in Technology Design & Define Performance Criteria for Design/Build Systems PV/ Solar Educate Everyone! Commissioning Data, Performance, Metrics Stay the Course. Key Lessons David Wakely Photographer 35

32 Client: Architect: CM: Contractor: Civil: Landscape: Structural: MEP: CXa: AV/IT: Lighting: Signage: Utility Grant: City of Berkeley/ Berkeley Public Library Harley Ellis Devereaux Kitchell, CEM West Bay Builders (Thompson Builders) Moran Engineering John North Roberts & Associates TippingMar Timmons Design + Harley Ellis Devereaux Orry Nottingham SFMI Miniscule Lighting Bruning Associates Savings by Design PG&E For More Info or Building Tours Contact: Gerard Lee, AIA LEED AP BD+C Principal, HMC Architects Gerard.Lee@hmcarchitects.com Mobile: Office: *3809 Project Team 36

33 Kyle Jeffers Photographer 37