Energy Audits

Energy audit summary

An energy audit is a survey and analysis of the energy flows in a building, home or other installation or process. It is carried out to identify energy loss and to reduce the amount of energy that is supplied without reducing the benefits of energy use. Energy audits can be used to identify energy usage patterns and times of peak demand, as well as process areas with particularly high energy requirements. For this reason, an energy audit is a low-cost first step to reducing energy demand.

Energy audits range in detail and complexity, from a simple evaluation of energy tariffs and peak versus off-peak use, to in-depth analysis of energy load profiles and sub-metering.

What type of audit?

We carry out energy audits as defined in Australian Standard AS/NZS 3598.1-3. There are three levels.

  • Level 1: (Overview) allows overall site energy consumption to be evaluated, to determine whether energy use is reasonable or excessive. A level 1 audit provides initial benchmarks of a facility’s energy use, so that the effect of improvement measures can be tracked and identified
  • Level 2: will identify the sources of energy to a site, the amount of energy supplied, and what the energy is used for. It also identifies areas where savings may be made, recommends measures to be taken, and provides a statement of costs and potential savings
  • Level 3: provides a detailed analysis of energy usage, savings which could be realised, and the cost of achieving those savings. It may cover an entire facility or may concentrate on an individual process or equipment item. Local metering or data-logging may be required

Potential process areas where significant high impact and/or low cost energy efficiency improvements might be found include:

  • Refrigeration and air conditioning
  • Waste heat recovery
  • Hot water generation and reticulation
  • Compressed air systems
  • Pumps and drives
  • Pipe design
  • Tank, cellar and office insulation
  • Lighting
  • Wastewater treatment
  • Power factor
  • Load balancing to reduce peak demand