NREL, Shanti Pless


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Deep Savings: Using Case Studies in Our Search for Success

Find Sources and learn from Case Study results already gathered on Best practices and Measured Performance.

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NREL, Shanti Pless

  1. 1. Innovation for Our Energy Future Case Studies and Tools for Deep Energy Savings in Existing Buildings Shanti Pless Senior Research Engineer Commercial Buildings Research Group National Renewable Energy Laboratory June 30, 2011NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC.
  2. 2. Session Outline• Advanced Energy Design Guides• Commercial Building Partnerships• High Performance Buildings Database
  3. 3. DOE’s Better Buildings Initiative 1. Tax incentives. Streamline the 179D commercial building tax deduction for tax year 2011 and restructure the tax incentive for tax year 2012. 2. Financing. Increase and accelerate financing opportunities for commercial and public building energy improvements through existing SBA loan program & proposed DOE loan guarantee program 3. Grants. Give competitive grants to state and local governments to streamline and update codes and regulations and to adopt policies and programs to attract private-sector investment in building retrofits. 4. Challenge. Challenge CEOs and university presidents to systematically upgrade their facilities for improved efficiency. 5. Workforce. Improve and expand workforce training and pilot a buildings extension service.
  4. 4. 30% Advanced Energy Design Guides• Packages of energy-saving recommendations to achieve 30% energy savings over ASHRAE Standard 90.1-1999• More than 300,000 guides in circulation since 2004• Include whole building case studies• Detailed documentation support each AEDG• Free download or soft cover purchase •
  5. 5. Next Steps in the AEDGs• 50% AEDGs• Technical Guidance for Existing Building Retrofits
  6. 6. Advanced Energy Guides for Existing Buildings(AEG-EBs) Purpose: Provide building owners and operators with comprehensive guidance for planning and executing successful retrofit projects in commercial buildings, tailored to specific building types and climate regions. Five AEG-EBs in development: – K-12 Schools – Office Buildings – Retail Stores – Grocery Stores – Hospitals and Outpatient Healthcare Facilities – Published end of 2011
  7. 7. Focus of AEG-EBsActionable information and tools – Systematic analysis of potential energy savings for most promising retrofit measures • By building type • By level of energy savings / depth of retrofit • By climate region – Methods for calculating complex, multi-year cash flows for retrofit packages in support of a strong business case – Cost points for tipping retrofit decisions – Case studies that support the recommendations with real-world examples
  8. 8. AEG-EB Tiers of Retrofit ProjectsExisting building commissioning – 5-15% site energy savings, 1-2 year payback – Retro-commissioning, low-cost/no-cost measuresStandard retrofit package – 15-30% site energy savings, 3-12 year payback – Energy-driven, cost-effective and low riskDeep retrofit package – >30% site energy savings, 7-15 year payback – May require special circumstances (e.g. combined with remodeling or repurposing the building)
  9. 9. Example Building Analysis in AEG-EBs Office K-12 Hospitals/ Grocery Building Type Buildings Retail Schools Healthcare Stores Climate Chicago Duluth Las Vegas Miami Seattle Elementary HighExample Building School School Retro- Standard Retrofit Depth commissioning Retrofit Deep Retrofit Energy Energy Energy Measure Measure Cost Savings MeasureMeasure Analysis Savings Analysis Cost Savings Analysis Analysis CostExample Retrofit Package 1 Package 2 Package 3 Packages M&V M&V M&V 1 2 3
  10. 10. Commercial Building PartnershipsAddress real-world concerns – Energy efficiency measures must be cost-effective, simple to maintain, and consistent with a company’s “look and feel”Are comprehensive – All building systems must be addressed to reach stretch savings goals and the solutions in each area must work togetherInclude research-quality verification – Buildings are submetered to ensure proper operation and measure performance of energy efficiency measuresCan be replicated – Lessons learned are incorporated into “actionable” case studies and products that allow companies to achieve similar savings across their building portfolios
  11. 11. CBP: Partnering for Speed and Scale Companies from the private sector working with national laboratories to achieve significant building energy savings. DOE national labs (NREL & PNNL) teamed Bank of America ProLogis with 23 companies to: ForestCity Simon IHG Tishman – Retrofit at least one existing building at Speyer 30% less energy Kohl‘s Whole Foods PNC CBRE Ryan Hines – Build one new building at 50% less Target John Deere energy than Standard 90.1 Westfield Opus Best Buy Regency Centers Labs provide technical assistance to biggest Hilton SuperValue names in retail, commercial real estate, JCPenney Toyota Macys and financial sectors Early results: 75% of the CBP projects likely to meet or exceed energy savings goals Commercial Building Partnerships
  12. 12. New Construction Project HighlightWhole Foods Market in Raleigh, North Carolina – Grand opening March 17th, 2011 – 40,000 ft2 grocery store – Projected annual cost savings of ~$100k versus code – Comprehensive whole-building approach addressing lighting, HVAC, refrigeration, plug loads, envelope, and commercial kitchen • identification of strategies applicable to existing stores – 40% savingsDescription of efficiency strategies – summary and checklist –
  13. 13. Existing Building Project HighlightsDowntown Denver Office Building Tenant Improvement – Upgrade completed February, 2011 – 23,000 ft2 (one floor) of a 52 story Denver landmark (built in 1983) – Projected annual cost savings of ~$12k (3 year simple payback) • 37% better than pre-retrofit and 28% better than 90.1-2004 – Report describing the business case plus the selected efficiency strategies and how they were chosen under developmentTarget – Upgrade in Thornton, Colorado expected to finish Fall, 2011 – 173,000 ft2 9-year old “SuperTarget” including commercial refrigeration and kitchens – Projected annual savings exceeding $100k • 30% better than 90.1-2004 – Report complete, waiting approval
  14. 14. CBP Case Studies in Progress DRAFT DRAFT
  15. 15. PNNL Existing Building Project Highlightsjcpenney, Colonial Heights, Virginia —completed• 45% modeled energy savings over historic baseline with 7.5-year payback• Chiller replacement, RTU replacement, interior lights, parking lot lights, signage, envelope measures, plug load controls• Case study under reviewCrowne Plaza Hotel, Arlington, Virginia —under way• 31% modeled energy savings over historic baseline• Partner developing cost estimates for economic analysis• Guest room PTHP replacement, public area HVAC and variable air volume upgrades, public area lighting, envelope measures• Case study in progressRegency Centers, Granada Village, California —under way• 28% overall modeled energy savings over historic baseline with 6.8-year payback• RTU replacement, parking
  16. 16. Other NREL CBP Upgrade ProjectsKohl’s department store in OhioSupervalu grocery store, MassachusettsWhole Foods Market in New JerseyPrologis warehouse in Mississippi • 30% savings from lighting retrofitsBest Buy, location TBD
  17. 17. Common StrategiesAcross multiple building types:• Upgraded fluorescent lamps and fixtures• LED display lighting• Daylighting• Variable speed RTU supply fans• Energy recovery• Plug load controls and efficient office equipment• Outdoor air optimization (DCV)In grocery stores specifically:• Evaporative condensing• LED fixtures in low and medium temperature cases• Doors on open medium temperature cases• ECM motors for evaporator fans• Variable frequency drives for condensers• Waste heat from refrigeration used for air and service water heating• Efficient commercial kitchen equipment
  18. 18. Upcoming Actionable Products• Assessing and Reducing Plug and Process Loads in Commercial Buildings• Guide to Increasing Efficiency in Existing Buildings• Setting Energy Performance Targets in Commercial Buildings• Use Your Energy Bills to Assess Building Performance and Save Energy• 30% Advanced Energy Design Guide User’s Manual• Information Technology Settings and Strategies in Commercial Buildings• Lighting Control Checklists for High-Performance Office Building Integrated Design• Variable Speed RTU Fan Upgrade Specification and Application Guide
  19. 19. Using OpenStudio for Existing Building Analysis
  20. 20. Buildings Database
  21. 21. PortalsDOE:• High Performance Buildings• Renewable Ready Buildings• High Performance FederalBuildings• Commercial BuildingPartnerships (coming soon)OTHER:• USGBC• AIA Top Ten• NBI• BuildingGreen• And others…
  22. 22. BuildingGreen Portal
  23. 23. New Implementation• Enhanced input fields and better input forms• Better project views• Better workflows and content management• Better integration with other websites
  24. 24. Thank You… A Question? is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC.