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Why Care About Building Energy Performance?. Aside from building energy increasing? Ignoring performance ratings is choosing to fly fairly blind — staying at the “dumb” end of the “dumb and dumber” scale Performance ratings are an evaluation, quickly, and not an investigation.

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why care about building energy performance
Why Care About Building Energy Performance?
  • Aside from building energy increasing?
  • Ignoring performance ratings is choosing to fly fairly blind — staying at the “dumb” end of the “dumb and dumber” scale
  • Performance ratings are an evaluation, quickly, and not an investigation
new construction has been a problem for 50 years increasing carbon footprint
New Construction has been a problem for 50 years, increasing carbon footprint
  • 2003 CBECS data with malls, kBtu/sq-ft-yr weighted means, higher source energy EUIs in newer buildings
  • CBECS data show same pattern with each survey year, life-cycle influences are shown
basic energy benchmarking performance info
Basic Energy Benchmarking (Performance) Info
  • Go to TC 7.6 website (shown on title slide previously)
  • Select Program Activities at bottom
  • Chicago 2006, Seminar 17, first presentation
  • Atlantic City 2002, Seminar 41, first two presentations
current ashrae high performance protocol project
Current ASHRAE High-Performance Protocol Project
  • “ASHRAE needs to provide guidance regarding the measurement and reporting of the performance of new and existing [commercial] buildings . . . .”
  • “ . . . to further the development of building energy performance standards.”
  • “Measuring and Reporting the On-site Performance of Buildings . . .”
ashrae standard 105 1984 to now
ASHRAE STANDARD 105 1984 to now
  • BSR / ANSI / ASHRAE Standard 105-1984 (RA99) covers measurement and expression of building energy performance at a basic level, with suggested optional extensions
  • Standard 105-[2007?] is a major revision and has been submitted for publication. It extends the coverage of energy performance measurement and expression, and comparison of building energy performance against others
  • The nature and level of performance comparison requires some performance “standard” and requires or intrinsically offers some evaluation
standards of comparison
Standards of Comparison
  • Minimum prescriptions or best practice levels (Stds 90.1, 90.2, 189P, LEED)
  • Self-reference, e.g., past and future
  • Ad-hoc building populations
  • Representative populations, e.g., CBECS, RECS for USA and CEUS for CA
2007 applications handbook energy comparisons using cbecs
2007 Applications HandbookEnergy Comparisons using CBECS
  • Chapter 35, energy management, 3 tables on commercial buildings
  • Based on 2003 CBECS micro-data without malls
  • About 50 building types
  • Site energy use indexes for mean and percentiles 10, 25, 50, 75, and 90
  • Electricity and cost indexes at same detail
commercial buildings energy consumption survey cbecs
Commercial Buildings Energy Consumption Survey, CBECS
  • Latest survey micro data available = 2003, next is 2007 (released in 2010?)
  • Publicly available government reports and data on EIA website
  • Nationally representative sample, with fairly complicated cluster sampling frame
  • Different versions have been available, ~5,000 records
  • Not including imputation flags, there are ~350 data parameters
  • Data seem to get better each time