NREL’s Presenter on Market Updates for Energy Efficiency - PowerPoint Presentation

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NREL’s Presenter on Market Updates for Energy Efficiency

Amy HollanderAmy.Hollander@nrel.gov

Emerging Technologies for Community ScaleMarket Updates:

Energy Upgrade Market BenefitsDeep Energy Retrofits (Net Zero)LightingHVACWater HeatingAppliancesRetro-commissioning Building Energy Modeling Tools

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Community Scale Energy Consumption

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Utility Programs See EE as a Resource

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Source:

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consume 41% of U.S energy $2,000 annual, per average American energy costs, $200 to $400 is wasted from air leakage and outdated HVAC The product of COMFORT in addition to monetary savings makes energy efficiency the most valuable EERE product.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 levelsAir sealing the building envelopeInstalling 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 watt800 lumens, 60 watt equivalent 11 watt bulb cost almost $8The 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 AngelesNovember 20, 2013The 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 unitsNew 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. OptionsHeat Pump Hot Water HeatersTankless or On-Demand Hot Water HeatersIndirect or Side-arm hot water added to 90% efficient space heating unit12

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 2043Household 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 centersRetro-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 controlsOptimize economizer functionalityOptimize schedules and optimum startEliminate boiler short cyclingNon-functional BAS allowing the building to “run wild” & equipment to function independentlyDedicated 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 PlusOpen StudioIn 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.

Gov

www.Building America.gov

Amy Hollander

Amy.hollander@nrel.gov

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