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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. What is Benchmarking?. Question: How well is my building performing? Answer: 42

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benchmarking to improve building performance

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

what is benchmarking
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?
what is benchmarking1
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?
what is benchmarking2
What is Benchmarking?
  • Defining Building Performance
  • Comparing it to…
    • Past performance
      • Trending
    • Expectations
      • Target setting and trending
      • Diagnostics
    • Other buildings
      • Internal benchmarks
      • External benchmarks
building performance metrics
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
benchmarking on past performance
Benchmarking on Past Performance
  • Collect and Calculate metrics
  • Trend them over time
comparing to other buildings the ideal benchmark
Comparing to Other Buildings: the Ideal Benchmark
  • Comparing to comparable buildings:
    • climate/location
    • size
    • building type
    • activities
    • end uses
    • occupancy
    • operation and maintenance
    • vintage
  • Normalized for anything you don’t have control over.
comparing to other buildings external benchmarks cbecs
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)
comparing to other buildings energy star labeled buildings
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
energy star portfolio manager
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
how to do benchmarking
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.
slide19
Thank you!
  • Questions?
  • source: www.nisd.net