Docstoc

sullivan

Document Sample
sullivan Powered By Docstoc
					  The Power of Information:
Rating and Disclosing Building
     Energy Performance

         Alexandra Sullivan
      US EPA, ENERGY STAR

        December 2, 2009
Agenda
 ENERGY STAR Ratings
     Objective
     Characteristics
     Technical foundation
     Accessibility
 Energy Rating and Disclosure
   Benefits
   Market Interest
   Key to Success
 Questions and Discussion

                                 2
ENERGY STAR Ratings
Objective
  Help businesses protect the environment
   through superior energy efficiency
  Motivate organizations to develop a
   strategic approach to energy management
  Convey information about energy
   performance in a simple metric that can be
   understood by all levels of the organization


                                              3
ENERGY STAR Ratings
Characteristics
  Monitor actual as-billed energy data
  Create a whole building indicator
    Capture the interactions of building systems not
     individual equipment efficiency
    Track energy use accounting for weather and
     operational changes over time
  Provide a peer group comparison
    Compare a building’s energy performance to its
     national peer group
    Track how changes at a building level alter the
     building’s standing relative to its peer group

                                                        4
ENERGY STAR Ratings
Technical foundation
  Analyze national survey data
    Commercial Building Energy Consumption Survey
     (CBECS)
  Develop regression models to predict energy
   use for specific space types based on operations
  Create scoring lookup table
    Ratings are based on the distribution of energy
     performance across commercial buildings
    One point on the ENERGY STAR scale represents
     one percentile of buildings
  Buildings that perform in the 75th percentile or
   better can earn the ENERGY STAR label
                                                       5
ENERGY STAR Ratings
Technical foundation
  The rating does
    Evaluate as billed energy use relative to building
     operations
    Normalize for operational characteristics (e.g., size,
     number of employees, walk-in refrigeration, climate)
    Depend on a statistically representative sample of the
     US commercial building population
  The rating does not
    Attempt to sum the energy use of each piece of
     equipment
    Normalize for technology choices or market
     conditions (e.g., type of lighting, energy price)
    Explain how or why a building operates as it does
                                                          6
Eligible Space Types



Bank/Financial   Courthouses    Dormitories           Hospitals         Hotels
 Institutions




  Houses of      K-12 Schools   Medical Offices   Office Buildings   Retail Stores
   Worship




                 Supermarkets   Warehouses           Wastewater                      7
                                                  Treatment Plants
ENERGY STAR Ratings
Accessibility: Portfolio Manager
  Free on-line tracking and benchmarking tool
  Available for any building
  Track energy use
        Site EUI
        Source EUI
        Weather normalized source EUI
        National average comparisons
    Energy performance ratings (for selected spaces)
    Track energy costs
    Track carbon emissions using eGRID
    Track water consumption
    Data sharing functions and automated data import
    Apply for ENERGY STAR recognition

                                                        8
Statement of Energy Performance




                                  9
Certificate for Display




                          10
Energy Rating and Disclosure
Benefits
  Identify inefficiency
      There is a great potential for cost-effective energy efficiency across the
       national building stock
      Better information on how much energy buildings use and how buildings
       compare to one another is critical to fulfilling this potential
  Provide a whole building assessment
      Energy assessment at the building level reveals information about how
       technologies interact and influence performance
  Improve energy performance
      Simple metrics are powerful motivators for change, spurring efficiency
       improvements within public and private organizations
      Metrics that can be easily quantified can be tracked regularly and
       communicated within and among organizations
  Maintain savings
      Simple quantifiable measures can be tracked year-to-year to ensure
       persistence of savings
      Almost 40% of ENERGY STAR labels each year are earning a label for
       the second or third time

                                                                                11
Energy Rating and Disclosure
Growing Interest
  Organizations and businesses
    Internal energy management tracking
    Internal disclosure of scores (store managers,
     regional and upper management)
    Voluntary disclosure of scores on web (school
     districts, governments)
  Real Estate information services
    CoStar
    Hotel services (Travelocity, AAA, Orbitz)
  Mandatory Disclosure Legislation
    Time of Sale (California)
    Annual public disclosure (D.C. New York City)
                                                      12
 Energy Rating and Disclosure
 Growing Interest
Learn about
governments leveraging
ENERGY STAR in
legislation and voluntary
campaigns.
www.energystar.gov/gove
rnment




                                13
Energy Rating and Disclosure
Keys to Success
  Measured energy data
      The use of actual measured building data is critical to assessing
       performance
      Measured data will account for interactions among building systems,
       building maintenance, tenant activities, etc
  Data verification
      Data must be accurate to provide a fair comparison among buildings
      Decision makers need to know that information is reviewed and
       complete
  Accessibility
      System and metrics should be easy to use and understand
      Costs should be kept to a minimum to encourage broad applicability
  Consistency
      Metrics should be used from design through construction and operation
      Standardized metrics provide a reliable platform for organizations


                                                                             14
Questions and Discussion

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:14
posted:9/20/2012
language:English
pages:15