Technology

If there was ever a place where manufacturers can save energy using compressed air and make measurable gains toward sustainability, it’s with pneumatics that power a seemingly infinite variety of machines and processes.

The initial cost of a nitrogen generation system may be greater than high-pressure cylinders and liquid nitrogen containers, but most companies will reach a return on investment within 12-18 months with proper sizing of the system based on process demands. Breweries typically experience savings associated with gases of 50-75% by switching to on-premises nitrogen generation. If a regular maintenance schedule is followed, PSA nitrogen generation systems can have a life expectancy of 15-20 years. 

In early October 2022, professionals from around the world gathered at the Best Practices 2022 EXPO & Conference in Atlanta to source and learn about the latest on-site utilities powering modern plant automation including compressed air, blowers, vacuum, pneumatics, motors and cooling water systems. This report recaps a fraction of the event’s education curriculum and provides an editorial tour of sponsoring exhibitors’ machinery displays and product introductions.

Compressed air production in industrial facilities consumes 10% of electrical power, on average. While this can vary up or down, it is an industrial average, and is very significant in most plants.
Do you know how much of your power cost goes to producing compressed air? We’ll come back to this at the end of this article.
 

The history of Festo began in 1925 in Germany. Festo USA was founded on March 15th, 1972 in Port Washington on Long Island, with the focus of being a full-line supplier of pneumatics – a focus we continue with today.

During Dealer Week, they needed enough compressed air to power multiple machines at a time all day long. Keeping simultaneous demos running for all their top machines required airflow of up to 400 cubic feet per minute (CFM). However, outside of Dealer Week, their compressed air demands were quite modest. On a typical day, they only needed 20 CFM to power their dust collection system and pneumatic tools for their dock and warehouse crating areas. 

The U.S. air compressor market has a compressed air installed base of at least 15 million horsepower. Further, it evaluated various air audits across different customer types, sizes and segments and determined U.S. manufacturers stand to save around 13 billion kilowatt hours (kWh) annually in electricity associated with compressed air. That translates to a savings of $1 billion in energy costs per year, which would remove nine million metric tons of CO2 annually. That equates to more annual energy usage of more than 1 million homes in the United States.

Headquartered in Noblesville, Indiana, SMC Corporation of America has grown exponentially since the company began operations in the United States in 1977. Today, the Noblesville campus occupies 345 acres and encompasses 2.6 million square feet of manufacturing and warehouse space. 

The use of high performance boosters to raise low pressure air (100 psig) to high pressure air (500-600 psig) for blow molders is very power efficient and offers good operating performance and reliability when well applied. 

Electronics applications typically run their tooling requiring Process Vacuum based on differential pressure from barometric; that is, they control their PVAC pumps to “Inches of Mercury Vacuum”. This is because the parts and pieces being manipulated by vacuum are of certain sizes, shapes, and weights. If the differential pressure across the part is not great enough, then the tooling will fail and result in a loss of product, adverse impact to quality, and production downtime.