Phoenix Convention Center Phoenix, Arizona Integrative Design: Deep Energy Approach Track 6: Integrated Energy Session 5: Integration of the Energy Industry Nicole Bulgarino Ameresco, Inc. August 12, 2015

Energy Exchange : Federal Sustainability for the Next Decade 2 Project Background Silver Spring Metro Center 1 208K SF Construction of this nine-story office building completed in 1987 Occupancy is approximately 700 All electric heating & cooing Initial EUI 120 New Carrollton Federal Building 1.1M SF Completed in 1994, consists of three nine-story office towers connected by “public level” on the ground floor Occupancy is approximately 5,000 All electric heating & cooling Initial EUI of 115

Energy Exchange : Federal Sustainability for the Next Decade 3 Project Highlights Integrated ECMs Lighting & Advanced Controls - 15% energy reduction Chiller System Optimization - 7% reduction Building Controls - 30% reduction Other improvement measures - 9% reduction Infrastructure measures - 1% reduction Renewable Energy Solar Thermal & PV System Geothermal Field Economics $45 M Project Implementation Costs 22-Year Performance Period $4 M Rebates

Energy Exchange : Federal Sustainability for the Next Decade Holistic & Comprehensive using integrated ECMs 4 Project Approach Identify load reduction measures Evaluate energy and water conservation measures which reduce energy and add customer value Evaluate energy efficiency upgrades Include renewable systems Assist agencies in meeting their respective High Performance and Sustainable Building goals Maintain stakeholders goals while minimizing disruption to tenants. Upgrade infrastructure – a major customer goal

Energy Exchange : Federal Sustainability for the Next Decade 5 Baseline Establishment Used eQUEST to Model Calibrated Models to Actual Utility Bills 115 kBtu/sf per year – all electric

Energy Exchange : Federal Sustainability for the Next Decade Roof Replacements – 33,000 SF Additional insulation replaced Additional Window Panes South facing lobbies Integrated blind system at Silver Spring Reduces infiltration, solar gains Augment Bi-fold Doors with Revolving Bi-folds open for 30 seconds Allow use of revolving door in lieu of bi-folds 6 Load Reduction - Building Infrastructure Improvements

Energy Exchange : Federal Sustainability for the Next Decade 7 Load Reducing ECMs: Lighting Replacement of fixtures in all areas including garageExisting Fixtures: 2x2 with three F40 Biax CFLs Measured load at 115 watts average Spaces over lit at foot-candles New Fixtures: 2x2 LED fixture Dimmed to 25 watts Provide the required 30 foot-candles Reduces cooling load Utility Rebates = $1,000,000+$11.8 per watt to install

Energy Exchange : Federal Sustainability for the Next Decade 8 Conservation ECMs: Lighting Controls Existing: Centrally Controlled via contactor panels Turns lighting circuits on and off at scheduled times Older DOS based system – not very user friendly New DALI system (digitally addressable lighting interface) Open Protocol (GSA preferred) DALI multi-sensors and local controls daisy chained with fixtures (occupancy and light level) Over 2,000 dynamic occupancy sensors Each fixture becomes individually addressable Graphical user interface

Energy Exchange : Federal Sustainability for the Next Decade Cooling system ECM Overview Reduce Light and other Load Replace & Resize Chillers Add Chiller-Heater “Waste” Cooling, Heating to Domestic Water Geothermal Field 9 Deep Retrofit of Space Heating & Efficiency Cooling System Upgrades

Energy Exchange : Federal Sustainability for the Next Decade 10 Chiller Plant Upgrade & Heat Recovery

Energy Exchange : Federal Sustainability for the Next Decade 11 Geothermal Well-Field

Energy Exchange : Federal Sustainability for the Next Decade 12 Deepest Energy Retrofit – Comprehensive DDC Controls Existing Building : Electric controllers with pneumatic actuation and pneumatic VAV boxes No feedback on DDC front end Requires annual calibrations Reactive maintenance Building designed with 200,000 CFM of outside for 6,000 occupants (33 CFM per person) Proprietary communication protocols New Control System All DDC with electronic actuation (removing compressors) Proactive maintenance C02 demand control ventilation will cut OA in half

Energy Exchange : Federal Sustainability for the Next Decade 13 Lighting and HVAC Controls Integration HVAC Control Strategies Demand-based reset schedules Optimum start and stop Chilled water flow matching (primary and secondary) Variable speed primary chilled water Lighting control system will pass occupancy sensor status to HVAC control system Allows to reduce outside air, overall airflow, VAV temperature deadbands will increase allowing more float of space conditions More aggressive during overtime mode

Energy Exchange : Federal Sustainability for the Next Decade 14 Integrating Renewables

Energy Exchange : Federal Sustainability for the Next Decade Challenges of complex project – Extensive coordination with multiple stakeholders within GSA for development, build, and M&V – Multiple Design reviews – Project runs 7 days a week, 20 hours a day during the week, 12 hours on the weekend – Work is always moving throughout the building. Vertical pipe runs require working on multiple floors and different ECMs – Planning, accessing secure areas, specific delivery requirements – Lengthy badging process – Work cannot impact tenants – Long-term savings guarantee 15 Challenges

Energy Exchange : Federal Sustainability for the Next Decade Integrative design & appropriate M&V Plan Project champions – National GSA office – Building Facility Manager – Project facilitator ECMs saved with design compromises – PV array and rain gardens – Window films and roof replacement Well-structured communication plan Transition Plan for systems NDER program – Standardization of processes – Streamlining of legal and logistical hurdles – Potential for improvements in commissioning of integrative design 16 Keys to Success

Energy Exchange : Federal Sustainability for the Next Decade Thank you for your time! Insert photo here: W: 5.04 in / 1512 px H: 5.72 in / 1716 px Thank you for your time! Questions?