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Jon Burke 2006 Mechanical Faculty Consultant: Dr. Jelena Srebric

An In-depth Look at a Green Roof. Jon Burke 2006 Mechanical Faculty Consultant: Dr. Jelena Srebric. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric. Outline. Building Information Purpose Procedure Results First Cost Analysis Lifetime Analysis Additional Benefits

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Jon Burke 2006 Mechanical Faculty Consultant: Dr. Jelena Srebric

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  1. An In-depth Look at a Green Roof Jon Burke 2006 Mechanical Faculty Consultant: Dr. Jelena Srebric

  2. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Outline • Building Information • Purpose • Procedure • Results • First Cost Analysis • Lifetime Analysis • Additional Benefits • Conclusions

  3. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Existing Conditions Rendering supplied by Kling Central Shared Use Facility FDA’s White Oaks Campus Silver Spring Maryland Design Firm: Kling Civil Firm: Greenhorne & O’mara Owner: GSA

  4. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Existing Conditions Rendering supplied by Kling 3rd Floor – Library 26,500 sq ft. VAV System Cold and Hot water pumped from Central Plant on Campus

  5. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Existing Conditions

  6. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Purpose How does size affect project costs and benefits? GOAL: Find “Benefit”/sf and optimal size • First Cost Analysis • Material and Labor • Rainwater Quality • Structural Support • Lifetime Analysis • Energy Savings • Maintenance Costs • Other Benefits • LEED Rating • Architectural Value

  7. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Procedure

  8. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Procedure

  9. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Procedure

  10. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Procedure

  11. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Procedure

  12. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Procedure

  13. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Procedure

  14. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Procedure

  15. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Results – First Costs Materials and Labor Built-up Flat Roof: $2/sf Green Roof: $14/sf COST $12/sf Green Roof

  16. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Results – First Costs Rainwater Runoff Quality Greenhorne & O’mara SAVE 69¢/sf of Green Roof Runoff of Green Roof is Clean Bio-Retention System 1 I.A. = 3000 sf Filter $10 /sf of Filter

  17. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Results – First Costs Structural Support for 50 psf 30” Diameter ($1,992)  14” Diameter ($875) 24” x 24” ($3,203)  12” x 12” ($1,252) COST $2.50/sf Green Roof

  18. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Results – First Costs Total First Costs Materials and Labor: $12/sf Structural Impact: $2.50/sf Filter System: -$0.69/sf Total: $13.80 Additional Cost per Square Foot of Green Roof

  19. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Results – Annual Costs Energy Savings • Peak Cooling Load Reduction • 0.6 tons/265 sf Green Roof • Annual Electric Load Reduction • 2.15 kWh/sf Green Roof GSA: 10¢/kWh SAVE 21¢/sf Green Roof PER YEAR

  20. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Results – Annual Costs Maintenance Costs Built-up Flat Roof Green Roof Annual Maintenance Lifetime: 15 yrs Negligible Maintenance Lifetime: ?? Greening Rooftops for Sustainable Communities. Chicago 2003. Page 280

  21. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Results – Other Benefits LEED Rating • Guaranteed • Credit 6.1: Stormwater Management – 1 point • Credit 7.2: Heat Island Effect – 1 point Architectural Value

  22. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Conclusion “Energy conservation is the foundation of energy independence.” ~Thomas H. Allen (D-ME 1st)

  23. Jon Burke 2006 Mechanical Option Consultant: Dr. Jelena Srebric Conclusion Any Questions?

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