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Sustainable energy conservations strategies that could be used in the bank branch:

Sustainable energy conservations strategies that could be used in the bank branch: Smart ventilation – to reduce HVAC (transitional seasons) Overhangs – to reduce cooling load (cooling season) Daylighting – to reduce electricity use (all year)

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Sustainable energy conservations strategies that could be used in the bank branch:

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  1. Sustainable energy conservations strategies that could be used in the bank branch: • Smart ventilation – to reduce HVAC (transitional seasons) • Overhangs – to reduce cooling load (cooling season) • Daylighting – to reduce electricity use (all year) • High performance windows – to reduce HVAC (all year) • Passive heating – to reduce heat load (heating season)

  2. Sustainable energy conservations strategies that could be used in the bank branch: • Photovoltaic energy production and solar hot water (all year – made attractive by new tax incentives) • High reflectivity, high emissivity roof – to reduce cooling load (cooling season).

  3. DOE Energy-Star Building Designation • Leed’s certification is too expensive. • US Dept. of Energy now has a designation for buildings that meet energy conservation criteria. • Less burdensome than Leed’s • See: http://www.energystar.gov/index.cfm?c=small_business.sb_index

  4. New (Jan 2006) tax incentives for energy conserving technologies: • $1.80/sq ft for commercial buildings that are constructed to save at least 50% of the heating, cooling, water heating, and interior lighting energy cost of a building that meets ASHRAE Standard 90.1-2001. • Solar Energy Systems - The tax credits are for 30% of the cost of the system (PV & hot water). • http://www.energytaxincentives.org/tiap-solar-energy-systems.html • http://www.energytaxincentives.org/tiap-commercial-bldgs.html

  5. Technologies: White Roofs • Maximize reflection and radiation heat loss. • Reduce cooling load, energy use, and equipment sizing • Longer life span • Options: PVC – TPO – EPDM – Spray

  6. Technologies: Daylighting • Features: • Many options available • Drive light deep into the room • Unobtrusive • Inexpensive Photo Credits: University of Oregon, Design Share, Inc., University of Florida Center for Construction and Environment, National Renewable Energy Laboratory web sites

  7. Six Keys to Daylight design: • Prevent direct sunlight penetration • Provide gentle uniform light • Avoid glare • Control • Electric lights work with the daylight • Plan the layout of interior spaces

  8. Daylight direction Daylighting controls regulate electric light usage. • Continuous dimming • Stepped dimming

  9. Skylights and Solar Tubes • Specific applications • Gets light far into a building • Saves lighting energy

  10. Design options: • Roof Monitors • Clerestories • Lightshelves • Controls • Lightwell • Surface color • Visible Light Transmission

  11. Keeping light diffuse, minimizing direct heat gain, and maximizing penetration are critical.

  12. Building cost of daylighting: • One example: Daylighting cost = $1.23/ft² (about half of building is daylit). • Includes roof monitors, light shelves, lighting controls, cloth baffles, etc. • Reductions in peak cooling load, electric lighting needs, and electric lighting energy cost more than offset cost of installation.

  13. Energy Savings • Reduction in annual lighting energy of daylit spaces: 70% • Reduction in annual cooling energy: 19% • Increase in annual heating energy due to reduced internal heat from lighting: 20% • (cooling load > heating load in our region)

  14. Paying for daylighting: • Construction cost: $1.23/ft² • Operation: • Annual lighting & cooling savings: $0.33/ft² • Annual heating cost increase: $0.04/ft² • Total annual energy savings: $0.29/ft² • Simple payback = 1.23/0.29 = 4.2 years

  15. Demand Reduction: • Little electrical lighting on clear days. • Intermittent on/off cycling on overcast days • Few complaints about cycling

  16. Online Resources • Available at www.daylightdividends.org Smith Middle School Harmony Library Guide for Daylighting Schools TomoTherapy, Inc.

  17. Non-Toxic and Environmentally Preferable Materials

  18. Types of Controls • Occupancy Sensors • Automatic on / Automatic off • Integration with HVAC

  19. Occupancy Sensors • Technologies: • Passive Infrared • Ultrasonic • Dual Technology

  20. Energy Analysis • Energy Analysis/Modeling Tools: • COMcheck™ • DOE-2 • Energy-10 • EnergyPlus

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