Envizi’s Equipment Fault Detection module combined with SoftMetering is at work in multiple commercial buildings in Australia.  In these buildings, Envizi has identified energy savings ranging from $10,000 to $20,000 per building, within the first weeks of project implementation.

Following implementation in a range of A grade commercial buildings with NABERS ratings between 4 and 5 star.  A range of issues were identified including the following:

FANS

  • Large car park fans continuously cycling on and off due to incorrect set points in the BMS
  • Return air fan left in manual overide

COOLING TOWERS

  • Condenser water reset strategy not implemented
  • Cooling tower fans and condenser water pumps short-cycling during part-load

CHILLERS

  • Inefficient Chiller staging strategy
  • Chiller short cycling during part-load conditions
  • Chilled water reset strategy not implemented

BOILERS

  • Heating hot water set-point not resetting during part load
  • Multiple boilers operating at very low loads (staging issue)

AIR HANDLING UNITS (AHU)

  • AHU start and stop times not optimised
  • AHU’s operating out of hours, on weekends and on public holidays
  • AHU supply air pressure reset strategy not implemented
  • AHU Economy Cycle Dampers not being fully utilised
  • Cooling valve failed to close or leaking