One Large Compressor or Multiple Smaller Ones?

How do you know if you should include one large compressor or multiple smaller compressors when you are designing your compressed air system? That’s a question we hear often, and one that has different answers depending on the application. However, here are some basic steps to take to help you determine the most efficient compressed air installation.

1. Determine the flow profile.

By first understanding when and how compressed air is being used, you will be able to better determine the most energy efficient installation.

For example, if your operation requires steady air for an extended period of time, a single compressor that is sized to meet the demand while keeping the compressor loaded the majority of the time will be the best choice. If you use compressed air for a variety of applications or if different shifts require different amounts of air, a multiple compressor installation will yield the most energy savings.

1. Perform an energy calculation.

In order to determine compressed air demand, perform an energy calculation such as an MBox study. An MBox study is a weeklong, 24/7 profile of your production air requirements and costs. During the audit, you operate your facility normally and data loggers record the activity of your compressors. This will give you a clear picture of your exact compressed air use, allowing you to apply the data to the decision-making process.

1. Consider other factors.

Other factors such as the need for redundancy in an operation, floor space requirements, compressor room arrangements and installation and maintenance costs should all be considered when designing a compressed air system. These secondary factors should be considered on a case-by-case basis only after first determining the best arrangement for your flow profile.

Make sure you dig a little deeper before designing your compressed air installation. You may be able to increase your energy savings substantially by choosing a different arrangement. If you’re still stumped, drop us a line and we’ll help you determine the most energy efficient solution.