Case Study: Improving Sustainability of an Existing Building

Transcription

1 Case Study: Improving Sustainability of an Existing Building Presented by Michael Meenan, PE Regional Environmental Manager, Burns & McDonnell NDIA Environment, Energy & Sustainability Symposium June 14-17, 2010

2 Sustainability Case Study Objectives Approach Sustainability Initiatives Lessons learned

3 Objectives Corporate culture of employee-ownership Investment Engagement of employees & community Awareness Involvement Education

4 Approach Existing building Constructed in ,000 square feet, class A office building Stakeholder challenges Multiple parties Building owner Property manager Tenant Differing vested interests Costs

5 Approach Phased approach currently in year 4 Phase I: Energy audit, results implementation Phase II: Sustainability audit Phase III: Implement sustainability initiatives Phase IV: Energy update and LEED Silver audit Phase V: Implement energy updates and LEED Silver initiatives

6 Initiatives Energy management Stormwater management Water and wastewater conservation Sustainable design Alternative transportation Sourcing/recycling

7 Energy Management Phase I (year 1) implementations Lighting retrofit in building and garage Chilled water and hot water variable-volume pumping, new pump motors Boiler replacement with natural gas condensing units Chiller replacement Removal of inlet vanes on air handling units LCD screen replacement Water conservation

8 Energy Management Building temperature Saves 100,000 kilowatt-hours and 77 metric tons of CO 2 e annually Equivalent of removing 15 cars off the road 74 72

9 MMBtu Energy Management Energy Management Savings Prior to Implementation 16% annual savings After Implementation

10 Energy Management Phase I (Year 1) results 16% annual energy savings Initiatives Cost: $300K-$5K Savings: $55K-$2.5K per year 7-year average payback U.S. Environmental Protection Agency Energy Star Award

11 Energy Management Phase V (year 4) measures in progress High efficiency transformer retrofit Demand-based ventilation control Demand-limiting strategies Demonstration projects Hybrid solar lighting Solar photovoltaic

12 Energy Management Hybrid solar lighting Currently in beta testing Natural light without heat and glare 50,000 peak lumens Illuminates 1,000 square feet of office space

13 Energy Management Solar photovoltaic Bifacial Panels Offsets 50 work stations at peak capacity Produces 5,000 watts of electricity

14 Stormwater Management Phase III (year 3) implementations Bioretention cells StormTreat unit Rain garden Demonstration projects Green roof Pervious pavement

15 Rain Garden Pervious Pavement Pervious Pavement Bannister Road StormTreat Unit Bioretention Summit Street

16 Stormwater Management

17 Stormwater Management Green roof Reduces rate and volume of runoff Reduces heat island effect Natural setting Reduces building heating and cooling needs Three optional areas identified

18 Stormwater Management Placement of Green Roof Option 1 Option 3 Option 2

19 FLOW RATE (CFS) Stormwater Management 1.2 UNIT HYDROGRAPH BARE ROOF VERSUS GREEN ROOF BARE ROOF BARE ROOF DRAINAGE MIMICS STORM EVENT - FREE DRAINING WITH PEAK DISCHARGE CORRESPONDING TO STORM PEAK WATER INTO STORAGE (DELAYS OUTFLOW.) WATER IN STORAGE IS LOST TO PLANT UPTAKE AND EVAPOTRANSPIRATION % RUNOFF REDUCTION. 0.2 GREEN ROOF TIME (Minutes)

20 Stormwater Management Pervious Pavement Void spaces allow water to infiltrate the pavement Reduces runoff volume Removes pollutants from stormwater runoff, improving water quality

21 Stormwater Management Program Summary: 19 million gallons of total site rainfall 37% treated or captured 18% runoff reduction

22 Water/Wastewater Conservation Initiatives implemented Phase III (year 2-3) Waterless urinals Eighth-gallon urinal Dual-flush handle for toilets Low-flow aerators Results Achieved 77% reduction in water consumption 1.5 million gallons conserved annually

23 Water/Wastewater Conservation

24 Millions of Gallons Water/Wastewater Conservation Water Consumption by Fixture Type Before Retrofits After Retrofits Toilets 3.5 to 1.6 gpf Sinks 2.2 to 0.5 gpm Urinals 1.0 to gpf

25 Sustainable Design LEED Silver certification (Phase V) Document design and construction upgrades First existing building in Kansas City to achieve LEED Silver certification Current APs

26 Lessons Learned Coordinating vested interests Tenant participation, desire to be environmentally responsible Educating and communicating to building users prior to and during implementation Prioritizing Starting small, not trying to tackle everything or large initiatives immediately Community awareness Benefits to the surrounding community

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28 Questions? Michael Meenan, PE Regional Environmental Manager Burns & McDonnell Phone: Web: