Commercial office building

EFD has demonstrated that, even in a 4-star building with major efficiency programs underway, analytics are required to ensure buildings continue to perform optimally.

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Building demographics

  • A-Grade Commercial Office
  • 4.5 Star NABERS Energy
  • Redeveloped in 2003
  • 40,700 m2, 22 Levels
  • Siemens DESIGO BMS

Problem

  • Complex and energy intensive HVAC systems with limited equipment level transparency
  • Root causes of energy wasted difficult to detect and diagnose
  • No way of understanding or managing peak demand

Envizi solution

  • Equipment Fault Detection Module
  • Software metering deployed on 49 items of HVAC equipment

Key insights

  • Opportunities identified to reduce peak demand
  • Equipment operating on public holidays (high rise)
  • AHU start and stop times not optimized
  • Inefficient chiller staging strategy (Smardt Chillers)
  • Multiple boilers operating at very low loads (staging issue)
  • Economy cycle dampers not being fully utilized
  • Economy cycle dampers operating in heating mode
  • Chiller short cycling (failed flow sensor detected)
  • Return air fan left in manual override for extended period
  • Cooling towers short-cycling during part load conditions

Highlights

  • Envizi EFD was instrumental in achieving a 12% total energy reduction in 12 months, which increased the NABERS rating by 0.5 Stars. Additional cost savings are expected once peak demand reduction strategies are implemented.

Other success stories

Large Hospital Building

Large Hospital Building

Over $60k energy cost savings opportunities identified over the first 8 weeks of operation.
Commercial Office Building

Commercial Office Building

EFD has demonstrated that, even in a 4-star building with major efficiency programs underway, analytics are required to ensure buildings continue to perform optimally.
Major Bank

Major Bank

$2.1m of energy waste identified and savings of $133,000 across the 20 worst performing sites.

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