Efficiency Matters: Compressor Transient Losses Explained

Efficiency is crucial when it comes to compressors. There are three types of rotary screw compressors: fixed-speed, dual-speed, and variable speed drive (VSD). Understanding compressor transient losses is key to appreciating the vast differences in energy efficiency among these three types.

What are Compressor Transient Losses?

Compressor transient losses refer to the energy consumed by a compressor without producing usable air as it cycles between operational phases. Essentially, this is wasted energy. For traditional fixed-speed compressors, transient losses can account for up to 20% of total energy use. In contrast, dual-speed screw compressors experience minimal transient losses, while Variable Speed Drive compressors virtually eliminate them.

Transient Losses in Fixed-Speed Compressors

Fixed-speed compressors are inherently prone to transient losses due to their operational characteristics. These compressors can only run at 100% motor speed and cannot start against a system under pressure, leading to several inefficiencies.

Transient Losses in Dual-Speed Compressors

Dual-speed compressors significantly reduce transient losses compared to fixed-speed units by operating at minimal speed during unload and being able to start against a system under pressure.

The Cost of Compressor Transient Losses

Understanding compressor transient losses and their impact is essential because energy costs typically constitute 80% of a compressor's total operational costs. By reducing transient losses, dual-speed compressors offer significant savings, making them a more efficient and cost-effective choice compared to fixed-speed compressors.

In summary, knowing how different types of compressors handle transient losses can help you make more informed decisions about which type to use, ultimately leading to improved efficiency and reduced operational costs.

If you would like to know more about transient losses, please reach out to one of our experts today.