DTE EnergyMichCon Energy Efficiency Seminars

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DTE Energy/MichConEnergy Efficiency Seminars

• DTE-ESD May 6 2008

Bob FeganDTE Energy Principal Energy Management
Consultant
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Presentation Outline

• Price of Natural Gas this year
• Energy Audit Basics
• Types of Energy Audits
• Sources for assistance with Energy Audits and
  Funding
• Resources from DTE Energy

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MichCon Historic Gas Price
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Audit Process Outline

• Determine the Scope of Work
• Gather the Data
• Analyze the Data
• Reporting
• Getting it DONE

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Determine the Scope of Work

• What kind of facility
• What kind of energy using equipment does the
  facility have
• Will it be a full audit or a focus on one
  technology or part of the facility
• What tools are required, if any
• What type of documentation or report is
  required/expected
• Who will be involved and what is their role
• How much time will be required
• Do YOU have the time and expertise for the Scope
  of Work

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Determine Scope of WorkThe Facility and Equipment

• Retail
• Lighting, small HVAC, small office equipment
• Grocery/C-Stores
• Refrigeration, small-med HVAC, Lighting, small
  equipment
• Warehouse/Distribution
• Large Refrigeration, medium HVAC, Lighting, Fork
  trucks
• Restaurant/Food Service
• Food prep, small HVAC, Lighting, Dishwashing,
• Hotel/Hospitality/Fitness Centers
• Small to large HVAC, Lighting, Food Service,
  Laundry, Pools
• Government/Office Buildings/Banking
• Small to large HVAC, Lighting, office equipment
• Industrial Process
• Substantial variation in process equipment based
  on product thermal processes, large motors,
  complex systems

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Determine Scope of WorkWhat Kind of Audit

• Full Walk-Thru look at everything, all areas
• Limited Walk-Thru one area or technology
• Detailed gather details analyze and calculate
  
• This will help determine the amount of time that
  could be required, and also the skills required.
  Perhaps a Team is required, or just one person.
• DIY or Get Help?

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Determine Scope of WorkWhat Tools are Required

• IR Remote Temperature Meter
• Light Meter
• Digital Camera
• Flashlight
• PDA or Notepad
• Make arrangements with others on-site for access
  to rooftops and mechanical areas.
• Consider Safety and Union issues.

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Determine Scope of WorkDetailed Audit Tools

• Tools may include
• AMP Meter
• Pressure Gauge
• Air flow anemometer
• IR Thermography camera
• Recording Watt Meters
• Ultra-sonic leak detectors
• These instruments should be used only by trained
  professionals. Walk-thru audits are hands-off
  visual observation only.

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Determine Scope of WorkWhat is the expected
result

• Agree with management what the result should
  look like or contain.
• A comprehensive report with Table of Contents and
  a photo essay
• A short summary recommendation

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Determine Scope of WorkCan you do it?

• Do it yourself
• Assemble a Team
• Hire an outside Auditor
• Do what you can
• Dont create an unrealistic expectation

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Gather Data

• Utility Usage History
• 12 to 36 months monthly energy usage in Units
  Not Dollars both Gas and Electric
• Chart in Spreadsheet look for abnormalities
• Review Actual Bill
• Check correct Tariff
• Billing Factor
• Sales Tax
• Billing Name and Address
• Start reading your meter(s) Weekly and track

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Getting Started

• ..where?

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Get the Big Picture

• What are the physical boundaries of the space
  being looked at? (outside v- inside common
  walls)
• Is there more than one meter?
• How is the space used/occupancy schedule
• Who/How controls temp, lighting, set-backs
• What equipment is used differently during
  different production schedules (max v- average
  demand)

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Gather Data what to collect

• HVAC
• type, size, age, condition, how controlled
• Lighting
• type, fixture type, quantity, variation
• Equipment
• what it is, input demand, operation schedule

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Gas and Electric Meters

• Confirm Meter Numbers and Billing Factors
• Be sure that the billing information is correct
  and billing the correct space/account

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Gather Data a few details

• Look for evidence of things broken
• Most facilities have taken Energy Management
  Action long ago, but installation once does NOT
  mean it will always be working

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Dont assume it works

• just because its installed

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General Maintenance

• Look for things in poor condition or not taken
  care of
• Even good equipment fails when not maintained

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Improper or Poor Installations
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Age versus Condition

• Look for old things that should be replaced
• Focus on improvedEfficiency, not justbecause
  they areold

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Space Heating

• What type of system(s) does the facility have?
• Is there a more efficient system?
• Is replacement economical?

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Space Cooling

• Small tonnage, air cooled, LEAST efficient type
• Expensive to replace, but, more expensive to
  operate less-efficient equipment

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Space Cooling

• Be sure the cooling system includes an economizer
  section with functional control

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Desiccant Dehumidification

• Desiccant dehumidification systems remove
  moisture more efficiently than refrigeration
• Energy exchanger wheel systems are designed to
  transfer both heat and humidity

• Energy Recovery Systems can be retrofit or new
  stand-alone units
• Desiccant systems are generally stand-alone units
  but may be in series with conventional cooling
  systems
• New units are being made smaller and first cost
  is coming down