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April 8 th 2013 California’s Commercial Building Energy Asset Rating System (BEARS)

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Presentation on theme: "April 8 th 2013 California’s Commercial Building Energy Asset Rating System (BEARS)"— Presentation transcript:

1 April 8 th 2013 California’s Commercial Building Energy Asset Rating System (BEARS)

2 2 Acknowledgements

3 3 3 An Energy Asset Rating… …evaluates the energy efficiency potential of a building

4 4 4 An Energy Asset Rating… …evaluates the energy efficiency potential of a building based on its construction, installed energy-consuming systems, and renewable energy systems.

5 5 5 An Energy Asset Rating… …evaluates the energy efficiency potential of a building based on its construction, installed energy-consuming systems, and renewable energy systems. Energy asset rating should not be considered an estimate of a building’s actual energy use

6 6 6 An Energy Asset Rating… …evaluates the energy efficiency potential of a building based on its construction, installed energy-consuming systems, and renewable energy systems. Energy asset rating should not be considered an estimate of a building’s actual energy use, rather it is designed to give the owner an idea of the energy efficiency potential of the building independent of the way the building is currently operated.

7 7 7 An Energy Asset Rating… …evaluates the energy efficiency potential of a building based on its construction, installed energy-consuming systems, and renewable energy systems. Energy asset rating should not be considered an estimate of a building’s actual energy use, rather it is designed to give the owner an idea of the energy efficiency potential of the building independent of the way the building is currently operated. This perspective enables a reasonable comparison of a building’s energy efficiency potential to other buildings.

8 8 Which is Getting Better MPG? biography/the-great-american-anti-towing- conspiracy/ 1/08/worlds-steepest-street.html ~20 MPG~100 MPG

9 9 Which is More Efficient? prius.html steepest-street.html 50 MPG 20 MPG 50 MPG

10 10 Role of an Asset Rating Real estate transactions Inform policy goals Demonstrate benefits of energy efficiency Prioritize energy efficiency investments

11 11 Data CollectionData Analysis Rating Calculation Rating Communication BEARS Rating Process

12 12 Data Collection

13 13 Input ParameterElectricGas Equipment Power Density49.37%1.46% Lighting Power Density21.74%0.23% Cooling Efficiency11.51%0.00% Window Area with Daylight Control5.50%0.00% Roof Reflectivity5.47%0.06% Glazing (solar heat gain coefficient)5.23%0.18% Daylight Controls4.92%0.06% HVAC System Type3.73%0.23% Fan Static Pressure3.49%0.06% Window Area with no Daylight Control3.44%0.00% Infiltration0.96%0.23% Roof Insulation0.74%0.12% Glazing U-Value0.57%0.06% Domestic Water Heating Efficiency0.00%42.69% Wall Insulation0.35%0.06% Heating Efficiency0.03%0.06% Ventilation Airflow0.00% Sensitivity Analysis

14 14 Data Collection Considerations Sensitive Parameters Non-Sensitive Parameters

15 15 Energy Modeling

16 16 DOE Reference Buildings EnergyPlus ASHRAE 90.1 and building types Represents 70% of the commercial building stock

17 17 Building Types Proposed BEARS Building Types DOE Reference Building Available Modify DOE Reference Building New Modeling Protocols Required Large Officex Medium Officex Small Officex Data Processing/Computer Center x Lab/R&D Facility x Quick Service Restaurantx Full Service Restaurantx Bar/Tavern/Nightclub/Similar x Supermarketx Convenience Store x Stand-alone Retailx Strip Mallx Refrigerated Warehouse x Unconditioned Warehouse x Conditioned Warehouse x Small Hotelx Large Hotelx Primary Schoolx Secondary Schoolx College or University x Religious Assembly x Health/Fitness Center x Theater/Performing Arts x Library/Museum x Conference/Convention Center x Other Recreational/Public Assembly x Service x Assembly/Light Mfg. x Police/Fire Stations x

18 Data Translation Data Collection FieldData Collection Parameter EnergyPlus Translation Occupancy TypeMedium OfficeSchedule = M-F 7:00- 7:00, Occupancy Density, Ventilation Rate Vintage1995Default constructions and efficiency values to Title 24 requirements in place in 1995 Interior Lighting Power Controls Occupancy SensorsApply power factor adjustment based on assumed space type Data Collection FieldData Collection Parameter EnergyPlus Translation Occupancy TypeMedium OfficeSchedule = M-F 7:00- 7:00, Occupancy Density, Ventilation Rate Vintage1995Default constructions and efficiency values to Title 24 requirements in place in 1995 Interior Lighting Power Controls Occupancy SensorsApply power factor adjustment based on assumed space type Data Collection FieldData Collection Parameter EnergyPlus Translation Occupancy TypeMedium OfficeSchedule = M-F 7:00- 7:00, Occupancy Density, Ventilation Rate Vintage1995Default constructions and efficiency values to Title 24 requirements in place in 1995 Interior Lighting Power Controls Occupancy SensorsApply power factor adjustment based on assumed space type Data Collection FieldData Collection Parameter EnergyPlus Translation Occupancy TypeMedium OfficeSchedule = M-F 7:00- 7:00, Occupancy Density, Ventilation Rate Vintage1995Default constructions and efficiency values to Title 24 requirements in place in 1995 Interior Lighting Power Controls Occupancy SensorsApply power factor adjustment based on assumed space type

19 19 Field Surveys

20 20 Data Collection Testing 5 sites Café Two Office Buildings Quickserve Restaurant Grocery Store

21 21 BEARS Rating

22 BEARS Certificate 2012 PROTOTYPE: NOT FINAL

23 23 Future of BEARS

24 24 Future of BEARS Testing Refine framework Develop assessor training Develop BEARS software tool Grow scope to include more buildings

25 BEARS provides a new way of thinking about the value of a building’s permanent assets, and creates a more robust link between energy efficiency and property value

26 ©2012 PECI All rights reserved. Kevin Campbell


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