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Technology Opportunities from California: Smart Grid and Cool Roofs

Learn about the smart grid and demand response in California, as well as the benefits of cool roofs for energy efficiency. Discover how these technologies are changing the design of buildings and reducing carbon emissions. Contact Arthur H. Rosenfeld, Commissioner of the California Energy Commission, for more information.

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Technology Opportunities from California: Smart Grid and Cool Roofs

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  1. Technology Opportunities from California 1. Smart Grid and Demand Response2. Cool Roofs: from Cool Cities to a Cooler World Arthur H. Rosenfeld, Commissioner California Energy Commission (916) 654-4930 ARosenfe@Energy.State.CA.US http://www.energy.ca.gov/commissioners/rosenfeld.html or just Google “Art Rosenfeld”

  2. Demand Response in CA

  3. Demand Response In 3 cool seasons CA peak is 40 GW, but a/c adds 20 GW in summer So we want demand response to price. So all customers will receive communicating interval meters, 10 million of them Dynamic pricing: TOU summer afternoon + “critical peak” 10 days/yr Programmable communicating thermostats and controls. Cost premiums are small: $20-30 for meters, $20-30 for thermostats TOU and dynamic pricing will change the design of buildings – promote thermal storage and the use of thermal mass, white roofs, etc. If you announce dynamic prices today, architects will design better buildings tomorrow.

  4. California is VERY MUCH a Summer Peaking Area

  5. Critical Peak Pricing (CPP)with additional curtailment option Potential Annual Customer Savings: 10 afternoons x 4 hours x 1kw = 40 kWh at 70 cents/kWh = ~$30/year ? 80 Standard TOU 70 Critical Peak Price CPP Price Signal 10x per year Standard Rate 60 Extraordinary Curtailment Signal, < once per year 50 Price (cents/kWh) 40 30 20 10 0 Sunday Monday Tuesday Wednesday Thursday Friday Saturday

  6. Just some of the proposed systems for PCTs and demand response in the residential and small commercial/industrial sectors.

  7. Santorini, Greece

  8. White is ‘cool’ in Bermuda

  9. and in Hyderabad, India …and widely in the State of Gujarat, India

  10. To be published in Climatic Change 2009 • Global Cooling: Increasing World-wide Urban Albedos to Offset CO2 July 28, 2008 Hashem Akbari and Surabi Menon Lawrence Berkeley National Laboratory, USA H_Akbari@lbl.gov Tel: 510-486-4287 Arthur Rosenfeld California Energy Commission, USA Arosenfe@energy.state.ca.us Tel: 916-654 4930 • A First Step In Geo-Engineering Which Saves Money and Has Known Positive Environmental Consequences

  11. Solar Reflective Surfaces Also Cool the Globe Source: IPCC 11

  12. 100m2(~1000 ft2) of a white roof, replacing a dark roof, offset the emission of 10 tonnes of CO2

  13. How to Relate to 10 Tons of CO2 • First – This is 10 tons ONCE, not 10 tons/year; • But familiar measures are usually in terms of tons/year; • So we will look at how many years of emissions 10 tons will offset

  14. CO2 Equivalency of Cool RoofsWorld-wide (Tropics+Temperate) • Cool Roofs alone could offset a total of 24 Billion Tons (Gt) CO2, = world emissions this year !!!! • Worth > €240 Billion (Pre-recession was €600B) • To Convert 24 Gt CO2 one-time into a rate • Assume 20 Year Program, thus 1.2 Gt CO2/year • Average World Car emits 4 tCO2/year, equivalent to 300 Million Cars off the Road for 20 years. (600 million cars in the world)

  15. The End For More Information: http://www.energy.ca.gov/commissioners/rosenfeld_docs/index.html or just Google “Art Rosenfeld” 15

  16. Methodology: Energy and Air-Quality Analysis

  17. Cool Roof Technologies New Old flat, white pitched, cool & colored pitched, white

  18. Cool Colors Reflect Invisible Near-Infrared Sunlight

  19. CourtesyBASF Coatings Cool and Standard BrownMetal Roofing Panels • Solar reflectance ~ 0.2 higher • Afternoon surface temperature ~ 10ºC lower

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