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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 external benchmarks cbecs1
Comparing to Other Buildings:External Benchmarks (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


Comparing to other buildings energy star labeled buildings1
Comparing to Other Buildings:Energy Star Labeled Buildings


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.


  • source: www.nisd.net


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