NREL’s Presenter on Market Updates for Energy Efficiency

Amy HollanderAmy.Hollander@nrel.gov

Emerging Technologies for Community ScaleMarket Updates:

• Energy Upgrade Market Benefits• Deep Energy Retrofits (Net Zero)• Lighting• HVAC• Water Heating• Appliances• Retro-commissioning • Building Energy Modeling Tools

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Community Scale Energy Consumption

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Utility Programs See EE as a Resource

4Source: 2013 State Energy Efficiency Scorecard

Community Scale Consumption and Savings Potential• Homes and commercial buildings

consume 41% of U.S energy • $2,000 annual, per average American

energy costs, $200 to $400 is wasted from air leakage and outdated HVAC

• The product of COMFORT in addition to monetary savings makes energy efficiency the most valuable EERE product.

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Deep Energy Retrofits

• Without Renewables, homes and buildings can achieve Home Energy Rating (HERS) scores in the low to mid 30s (Range is 0-150)– Double-stud walls filled with 12 inches of open-cell spray

foam that yields an R-46 insulation value– Exceptional air sealing– R-10 of rigid foam insulates the basement slab while R-20 of

closed cell spray foam insulates and air seals the inside of the basement walls

– R-36 of spray foam insulates and air seals the rim joists– Min-split heat pumps heat and cool the interiors

• Adding solar PV to buildings can achieve a HERS scores as low as -37.

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Source: Building America Building Technologies Office

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The Net Zero Energy Building

The Zero Energy Ready Building

• Increasing insulation levels• Air sealing the building envelope• Installing the most efficient HVAC• Lighting and appliances• Whole-house approach that also takes into account building

durability and moisture issues• Conduit, wiring, and plumbing for solar photovoltaic and

water heating panels can be conveniently added while the home is under construction

• A zero energy-ready home is built ready for solar panels whenever the homeowner is ready to purchase them

• With a super-efficient home, not only will the homeowner have lower utility bills, when they are ready to install solar, they’ll need fewer panels to reach net zero, and fewer panels mean lower costs for purchase and installation.

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Light Emitting Diode (LED)

• Today, available LED technology is about 150 lumens per watt– 800 lumens, 60 watt equivalent – 11 watt bulb cost almost $8

• The Energy Department’s target is 250 lumens per watt – a 75% increase.

• Higher performing LEDS will help further reduce overall costs and increase lighting efficiency.

• Solid State lighting (SSL) can reduce electricity needs by 50%

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LED Lighting Results

• Lighting the Way for Big Energy Savings in Los Angeles

• November 20, 2013• The world's largest light emitting diode (LED)

conversion project to date is under way in Los Angeles, California.

• In the project’s first phase alone, the city retrofitted over 141,000 streetlights, reducing energy use by 63% and saving the city $7 million a year in electricity costs. The project is expected to reduce carbon emissions by 47,583 metric tons annually, which is equivalent to removing about 10,000 cars from Los Angeles roadways per year.

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HVAC • 32.4% of energy use is from HVAC (Heating and

Cooling)– Always replace heating systems with 90% efficient units– New systems as young as 1970 are cost effective when

replaced by modern 90%+ efficient systems.

• Buried And Encapsulated Ducts :Installing HVAC ducts in unconditioned attics causes large energy loss ranging from 10% - 45%, significantly increasing electricity bills for air conditioning. Building America researchers developed and tested a technique for insulating ducts with spray foam and burying them in attic insulation. The team’s research shows ducts installed this way in a vented attic can match the efficiency performance of ducts in conditioned spaces.

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Water Heating

• All traditional gas water heaters offer approximately 60% efficiency.

• Options– Heat Pump Hot Water Heaters– Tankless or On-Demand Hot Water

Heaters– Indirect or Side-arm hot water added to

90% efficient space heating unit

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Heat Pump Water Heater

New Heat Pump Water Heater

Retrofit Heat Pump Kit

• Install location must• Remain between 40º

to 90ºF• Be at least 1,000 cubic

feet of air space

• Cool exhaust air can be exhausted to the room or outdoors.

• Install in a space with excess heat, such as a furnace room.

Tankless On-demand Hot Water Heater

Heats water through heat exchangers as needed at the rate of 2 to 5 gallons per minute.

Indirect or Side-Arm Hot Water Heating

Appliances

• Efficiency standards for refrigerators and freezers will improve efficiency by 255 by 2014.– Will deliver more than $200 in electricity bill

savings for typical consumer.– Nationally this will save $21 billion on energy

through 2043

• Household appliances account for about 15% of your household's energy consumption, with refrigerators, clothes washers, and clothes dryers at the top of the consumption list.

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Retrocommissioning

• Applicable for multifamily, casinos, schools, community buildings, rec centers

• Retro-commissioning is a process for “tuning up” a building’s equipment to make it work as efficiently as possible without major capital investment.

• Retro-commissioning for buildings is a low cost way to reduce energy costs by 10% to 20%, adding comfort as a dominant non-energy benefit.

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Examples of RCx Changes to a Building

• Enable malfunctioning controls

• Optimize economizer functionality

• Optimize schedules and optimum start

• Eliminate boiler short cycling

• Non-functional BAS allowing the building to “run

wild” & equipment to function independently

• Dedicated IT Cooling (Casinos)

Building Energy Modeling Tools

• DOE’s Building America teams of building science experts have developed key technical tools:– 10 energy saving strategies as "top innovations" to

transform the residential building industry. – Energy Modeling Software Energy Plus– Open Studio– In 2013, 130 Technical Reports on building energy

innovations

• View a full list of Building America’s top innovations or go to Building America.gov to access an extensive collection of technical resources, tools and other solutions that improve energy performance and quality of new and existing homes and buildings.

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Thank You & Contact Information For Technical Assistance: IndianEnergy@hq.doe.gov.

DOE Office of Indian Energy Website:www.energy.gov/indianenergy

Building America. Govwww.Building America.gov

Amy HollanderAmy.hollander@nrel.gov

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