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Benchmarking to Improve Building Performance

This presentation by Kristin Heinemeier, Ph.D., P.E., explores the essential role of benchmarking in evaluating and improving building performance. Attendees learned how to assess their buildings' energy consumption, set performance targets, and make informed decisions regarding maintenance and retrofits. The presentation delves into metrics like kWh/month, kBtu/sqft, and comparisons with internal and external benchmarks, including Energy Star ratings. By the end of this session, participants gained insights into actionable strategies for optimizing energy use and achieving sustainability goals.

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Benchmarking to Improve Building Performance

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  1. Benchmarking to Improve Building Performance Kristin Heinemeier, Ph.D., P.E. Technical Director Brooks Energy & Sustainability Lab Presentation to the Texas Energy Partnership September 8, 2004

  2. What is Benchmarking? • Question: • How well is my building performing? • Answer: 42 • Next question: • Compared to what? • Next question: • What should I do about it?

  3. What is Benchmarking? • A tool to help support decisions. • Is my building using too much energy? • How “good” are my buildings? • Where are my energy costs going? • How am I doing on reaching my goals? • Which of my buildings need improved maintenance? • Does my building need retrofits? • How much should I be willing to spend to do a retrofit?

  4. What is Benchmarking? • Defining Building Performance • Comparing it to… • Past performance • Trending • Expectations • Target setting and trending • Diagnostics • Other buildings • Internal benchmarks • External benchmarks

  5. Building Performance Metrics • kWh/month • Ccf/day • kBtu/year • dollars • kBtu/sqft • normalized for: • number of days in reading • weather • operating hours • segregated for other drivers: • electric heating, data centers, kitchens

  6. Benchmarking on Past Performance • Collect and Calculate metrics • Trend them over time

  7. Benchmarking on Expectations • Setting targets

  8. Comparing to Other Buildings: the Ideal Benchmark • Comparing to comparable buildings: • climate/location (zip code) • size • building type • activities • end uses • occupancy • operation and maintenance • vintage • Normalized for anything you don’t have control over.

  9. Comparing to Other Buildings: Internal Benchmarks • Annual Energy Use

  10. Comparing to Other Buildings: Internal Benchmarks • Annual Energy Intensity

  11. Comparing to Other Buildings:External Benchmarks (CBECS) • DOE Commercial Building Energy Use Compilation and Survey • Southern Census Region, Annual kBtu / sqft: • Education 67.8 • Food Sales 204.9 • Health Care 174.2 • Outpatient Health Care 80.7 • Lodging 101.9 • Mercantile 65.4 • Retail 71.1 • Enclosed and Strip Malls 61.8 • Office 90.7 • Public Assembly 68.2 • Religious Worship 28.9 • Service 157 • Warehouse and Storage 32.9 • Other 105.3 • (www.eia.doe.gov/emeu/cbecs)

  12. Comparing to Other Buildings:External Benchmarks (CBECS)

  13. Comparing to Other Buildings:Energy Star Labeled Buildings • Recognition for “good” buildings • Separate rankings for different types of spaces: • offices, K-12 schools, hospitals, hotels, supermarkets • Describe simple building characteristics • zip code, sqft, occupants, computers, op. hours • Enter energy use • Receive a “score” based on percentile • www.energystar.gov

  14. Comparing to Other Buildings:Energy Star Labeled Buildings

  15. Energy Star Portfolio Manager • Track energy use and costs • Benchmark with other similar bldgs. (calculate score) • Benchmark with your other bldgs. • Set and track baselines and targets • Track improvements • www.energystar.gov

  16. How to do Benchmarking • Collect energy data. • Calculate and chart metrics for individual buildings. • Chart trends in individual buildings and groups of buildings. • Define baselines and targets for individual buildings or groups of buildings. • Periodically evaluate your performance and goals.

  17. Thank you! • Questions? • source: www.nisd.net

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