Compressed Air Systems

Compressed air is widely used across all sectors of industrial processing, yet it remains the least understood utility and is a prime area for energy reduction. A plant’s compressed air system is typically only 12.5% efficient, so small reductions in compressed air use can result in significant electricity savings. It is estimated that the majority of compressed air systems contain inefficiencies where energy savings of 20 – 50% can be found with relatively low implementation cost.

Ever wondered how much energy your site’s air compressors use, or just where all that compressed air goes? Energy NZ’s compressed air system auditing service, which first begins with a base-level opportunity study, can quickly answer these questions as well as identify key areas where energy saving potential lies.

For large or complex compressed air systems, Energy NZ can undertake an investment-level opportunity study where the total system input power and individual flow and pressure readings are recorded and analysed.

Unlike traditional energy efficiency studies, Energy NZ can then assist with the project management, implementation and temporary or permanent post monitoring of any compressed air system efficiency project that has been identified as part of the initial stage.

As Energy NZ is a recognised EECA programme partner, we can also assist with all Government programme funding options, including funding for base-level and investment-level opportunity studies, and assistance with implementation including funding for capital costs, project management and post-implementation monitoring and reporting. The base-level opportunity study is 100% funded in most situations, giving you a zero-risk overview of potential opportunities within your compressed air systems.

Auditing Levels

Energy NZ’s compressed air system auditing services are divided into three parts, with each part being carried out in accordance with the New Zealand Compressed Air System Audit Standard.

1. Base-Level Compressed Air System Audits

  • Walk-through assessment, data collection and system check as per the base-level requirements of the audit standard
  • Short report produced, including identification of system efficiency improvements and where investment-level auditing work is required

2. Investment-Level Compressed Air System Audits

  • Typically for sites which have already undergone a base-level system audit
  • In-depth data collection, ultrasonic flow loggings, ultrasonic leak detection survey, in-line flow loggings, electrical power quality loggings, pressure loggings and detailed calculations as per the investment-level requirements of the audit standard
  • Comprehensive report produced, including quotes from product suppliers designed to be very accurate and easy to implement

3. Compressed Air System Implementation Projects

  • For opportunities identified through either an Investment-Level audit or feasibility study, Energy NZ can assist with potential Government funding and provide project management and post-implementation reporting and monitoring services.

For further information on Government funding options towards compressed air system audits and capital grants, download our Compressed Air System Programme brochure. Compressed Air System Brochure