Energy Audits and More or What We Do

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Energy Audits and MoreorWhat We Do

• Smart Energy Design Assistance Center
• University of Illinois at Urbana-Champaign

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Energy Audit Steps

• Preparation/Benchmarking
• Site Visit/Observation
• Modeling
• Quantify Energy Savings

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Before we go...1. Preparation and Benchmarking

• Utility bills
• 12 months

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Compare bills with Degree Days
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Before we go...1. Preparation and Benchmarking

• Utility bills
• Benchmarking
• ENERGY STAR Target Finder
• Energy Use Intensity (EUI) kBtu/ft2/yr
• Energy Cost Intensity (ECI) /ft2/yr

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Before we go...1. Preparation and Benchmarking
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1. Prep Equipment

• digital camera
• measuring wheel
• measuring tape
• measuring laser
• light meter
• IR temperature gun

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2. On site observations

• Envelope
• Insulation
• Roof/attic
• Perimeter of slab/crawlspace
• Walls

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2. On site observations

• Envelope
• Insulation
• Infiltration

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2. On site observations

• Envelope
• Insulation
• Infiltration
• Windows

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2. On site observations

• Envelope
• Heating, Ventilation, and Air Conditioning
• Correct sizing
• Efficiency
• Ventilation rate
• Controls

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2. On site observations

• Lighting
• Measure footcandles ? Overlit?

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2. On site observations

• Lighting
• Measure footcandles ? Overlit?
• Lamp types, ballasts ? Efficacy (lumens/Watt)?

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Efficacy - Lumens per Watt
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2. On site observations

• Lighting
• Measure footcandles ? Over lit?
• Lamp types/wattages ? Efficacy (lumens/Watt)?
• Lighting Power Density (Watts/ft2)?
• Varies with function of space

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2. On site observations

• Lighting Opportunities...
• Controls
• Daylighting (dimming, on/off, bi-level
  switching)?
• Occupancy sensors

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2. On site observations

• Envelope
• Heating, Ventilation, and Air Conditioning
• Lighting
• Other energy users
• Plug loads
• Hot water

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2. On site observations

• Other data to collect
• Measure areas
• Occupancy patterns

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3. Modeling

• Spreadsheet
• Trane Trace 700

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3. Modeling

• Spreadsheet
• Trane Trace 700

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3. Modeling Match with utility bills
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3. Modeling Energy Balance Where does
it all go?
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3. Modeling

• Spreadsheet
• Trane Trace 700

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4. Quantify Energy Savings
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4. Quantify Energy Savings

• Economic analysis
• Payback period
• Internal Rate of Return (IRR)?
• Net Present Value (NPV)?

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Questions? Call SEDAC at 800-214-7954