Building Energy EfficiencyLowering fossil fuels consumption

Miguel Quinones – Program Specialist – Virgin Islands Energy Office

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Grocery shopping analogyHow much would you spend on groceries if you only got the bill at the end of the month? How much energy do you use?

Kwh per month?

Kwh per day?

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Who knows what’s their WAPA bill breakdown?

RESIDENTIAL COMMERCIALCONSUMPTION= 500 (KWH)

 

RATE PER KWH

SINGLE PHASE

    $5.54

BASE RATE $0.081 $40.53

LEAC - SURCHARGE

$0.360 $180.00

LINE-LOSS SURCHARGE

$0.002 $1.10

PILOT $0.001 $0.35

TOTAL MONTLY BILL

$0.457 $228.47

CONSUMPTION= 1200 (KWH)

 

RATE PER KWH

SINGLE PHASE

    $7.21

BASE RATE $0.116 $139.27

LEAC - SURCHARGE

$0.360 $432.00

LINE-LOSS SURCHARGE

$0.002 $2.64

PILOT $0.001 $0.83

TOTAL MONTLY BILL

$0.479 $581.95

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Who is using all that power?

It depends on your habits!

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How much power does each use?Consumption: Energy use over time, ie. 100 watts x 10 hours = 1000 wh or 1 kwh

Appliances Consumption

Light bulb 60 w

Light bulb 14 w

Laptop 50 w

Desktop PC 130 w

TV 65 -175 w

Ceiling fan 65 - 175 w

Window fan 55 - 250 w

Water pump 250 - 1100 w

Refrigerator 82 w

Appliances Consumption

Window AC 1200 w

Water pump 250 - 1100 w

Vacuum cleaner 1000 -1440 w

Toaster oven 1225 w

Clothes iron 1000 - 1800 w

Hair dryer 1200 - 1800 w

Clothes dryer 1800 - 5000 w

Water heater 4500 - 5500 w

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Appliances Consumption

Light bulb 14 w

Laptop 28 w

Desktop PC 53 w

TV 60 w

Ceiling fan 65 w

Water pump 250 w

Refrigerator 35 w

Energy Star and Consortium for Energy Efficiency

Consumption: Energy use over time, ie. 100 watts x 10 hours = 1000 wh or 1 kwh

Appliances Consumption

Window AC 600 w

Water pump 250 - 1100 w

Vacuum cleaner 1000 w

Water heater heat pump

2200 w

Solar water heater (solar pump or thermo syphon)

0 w

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Daylighting

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Water savings

Fixtures

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With or without AC? Natural Ventilation vs. Air Conditioning

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Insulated Concrete Form (ICF)• is a system of formwork for

concrete that stays in place as permanent building insulation for energy-efficient, cast-in-place, reinforced concrete walls, floors, and roofs.

• Needs exterior and interior finishing.

• Resistant to hurricanes, also earthquakes if reinforced.

Exterior & Interior Insulation

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Exterior & Interior InsulationInterior Insulation

←Rigid Foam

←Sprayed Foam

←Radiant Barrier

R-4 R-5 R-6.5

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Infiltration

• Infiltration is the unintentional or accidental introduction of outside air into a building

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How to prevent mold and save money

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Variable Refrigerant Flow Systems

• They can provide thermal comfort for building occupants. In order of importance:1. Ventilation2. Humidity Control3. Cooling

• VRF is easier to design and offers space-saving features. Its modular format lends itself to phased installations.

• Humidity Control – by actively controlling the humidity and temperature at the same time, mold growth can be prevented. Traditional air conditioner systems overcool the spaces in order to remove the humidity.

• Energy Efficiency – the compressors on these units vary the speed up and down to meet the requirements, keeping the space at constant conditions and preventing duct loss.

• Zoned Comfort - each individual zone can have personalized comfort.• Quiet Operation – many Indoor and outdoor units are very quiet so they can be

placed just about anywhere.• Lower Lifecycle Cost - operate with minimum energy usage. Only service the

zones that need it, which allows for less required maintenance.

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Stop the waste

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Watch it like a hawk

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What will the price of barrel of oil in 4 years?

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WTI Oil Prices

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Energy Efficiency & Renewable Energy can help

• Incandescent light bulb = 40 watts/hour $2 life 20,000 hours• =

• LED light bulb = 8.7 watts (40 watts equivalent) /hour at $18 life 50,000 hours

• =$200.7

• Renewable energy (solar) = $6 watt installed @ 20% efficiency

• In order to power 40 watt light bulb @ 20% efficiency 200 watts are necessary = $1200 vs. $261

• Total costs $1205 vs. $279

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Rent or Own?

Own• If you plan to keep the home

and appliances for just a few years it makes sense to invest.

• The initial investment is steep, but return on the investment is better than keeping the money in the bank.

• Some financial incentives are available: rebates, loans, tax credits.

• The value of the building will also go up.

Rent• When entering into a lease,

request an energy assessment of the property.

• When renewing a lease, negotiate with the landlord, it benefits both if the usage is the same.

• Landlords can set electricity consumption limits for leases with power included.

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Where are we going?

2009 Baseline

100% Fos-sil Fuels

2025 Energy Mix60% Reduction in

Fossil Fuels Consumption

40% Fossil Fuels

38% En-ergy Effi-ciency

22%Renewable

Energy

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Thank you!

For more information please:Contact Miguel Quiñones ,Virgin Islands Energy Office at 340-714-8436• E-mail miguel.quinones@eo.vi.gov

Join the EDIN USVI Energy Efficiency Working Group blog at http://usvieewg.blogspot.com/

We look forward to helping you save energy and money while preserving our environment for current and future generations.