Compressed Air
Improving the energy efficiency of compressed air systems offers significant benefits. Compressed air is essential for many industrial and commercial processes, but inefficient systems—such as outdated compressors, air leaks, and poor maintenance—can lead to excessive energy waste and high operating costs. By optimizing air compressors, fixing leaks, and implementing better controls, businesses can reduce energy consumption, lower costs, improve equipment reliability, and enhance overall system performance.
Air Receiver Tank
An air receiver tank helps compressed air systems work more efficiently by storing extra air and smoothing out sudden changes in demand. This reduces strain on the compressor, cutting down on how often it has to start and stop, which saves energy and lowers wear and tear. A well-sized tank also keeps air pressure more stable, making equipment run more smoothly. In some cases, it can even allow businesses to use a smaller compressor or delay buying new equipment, saving money in the long run.
Variable Frequency Drive (VFD) on Air Compressor
A variable frequency drive (VFD) helps a rotary screw air compressor work more efficiently by letting the motor adjust its speed based on how much air is needed. Instead of running at full power all the time, the compressor slows down when demand is low, saving energy and reducing costs. A VFD also helps the equipment last longer by putting less strain on its parts and keeps air pressure more stable, preventing sudden changes that can affect system performance. This makes the compressor more reliable and cost-effective in the long run.
Zero-Loss Condensate Drain
Zero-loss condensate drains help compressed air systems save energy by preventing unnecessary air loss. Traditional drains work on a timer, sometimes releasing compressed air along with the condensate, which wastes energy. Zero-loss drains only remove condensate when needed, keeping all the compressed air inside the system. This improves efficiency, lowers energy costs, and ensures reliable operation with minimal maintenance. It’s a simple upgrade that can make a big difference in performance.
System Audits & Leak Detection
A compressed air system audit is a comprehensive evaluation that identifies opportunities to improve energy efficiency, system reliability, and overall performance. It includes an in-depth assessment of compressor sizing, controls, storage capacity, distribution, and end uses, along with data-logging key metrics like system pressures, airflow, and energy consumption. As part of this full audit, a leak detection analysis helps pinpoint and quantify compressed air leaks, which can account for 20%-30% or more of system energy losses. The audit provides actionable recommendations for optimizing equipment, performing maintenance, and repairing leaks—ultimately reducing unnecessary energy use, lowering operating costs, and enhancing system stability.
Customized Compressed Air Projects
For compressed air system upgrades not covered by the prescriptive measure above, Hawai‘i Energy offers custom project support. Custom improvements include:
- Replacement of large or specialty air compressors
- Advanced control system integration for multi-compressor systems
- System reconfiguration for optimized distribution and reduced pressure losses
- Implementation of heat recovery systems for process or other heating applications
- Major system redesigns to eliminate wasteful uses or inappropriate system sizing
Custom projects are subject to engineering review, pre-approval, and savings verification per the Custom Project Guidance. Custom compressed air incentives and savings are accounted under custom—see Customized Projects.