Technology

ASHRAE 90.1 Brings New Requirements to Compressed Air System Design

By Troy Dreier, Compressed Air Best Practices® Magazine

Word is beginning to filter out about the 2022 changes to the ASHRAE 90.1 energy efficiency standard, and the changes it promises to bring to how compressed air systems are specified, commissioned and maintained. More specifically, the industry is learning about section 10.4.6 of 90.1, which is the first time the standard has included a section on compressed air.

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Calculating the Water Costs of Water-Cooled Air Compressors

By Manhar Grewal, Sullair

Compressed air systems are present in almost all industrial processes and facilities. They have been correctly identified as an area of opportunity to reduce electrical (kW) energy costs through measures like reducing compressed air leaks and identifying artificial demand and inappropriate uses. Water-cooled air compressors can also be significant consumers of water and reducing these costs can represent a second area of opportunity.

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How’s the Weather in Your Pipes

By Ron Marshall for the Compressed Air Challenge®

What are the conditions inside your pipes, is it cloudy and hot with showers or cool and dry? Could there be snow and blowing snow and excessive icing conditions? Are there smog and dust storm conditions or is the air as fresh as a mountain breeze. All these conditions are commonly experienced inside compressed air systems. What you get is determined by your selection of system equipment, ambient conditions and how well your system is maintained.

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Food Processor Saves $101,000

By Hank van Ormer, Air Power USA

This facility is part of a major corporation with dozens of manufacturing facilities where consumer good food products are processed and packaged for shipment to retail outlets. The factory was spending \$210,000 annually on energy to operate their compressed air system. This system assessment detailed four (4) project areas where yearly energy savings totaling \$100,855 could be found with an investment of \$100,000.

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Oil-Free Technology From Anest Iwata

Compressed Air Best Practices® Magazine interviewed Mr. Tom Fermann from Anest Iwata Air Engineering.

Anest Iwata was the first company in the world to develop the air-cooled, oil-free(dry), scroll vacuum pump. We provide a very compact package with lower vibration and noise levels than competitive offerings. Our oil-free vacuum pump market share, in Japan, is estimated to be fifty percent in the <600 L/min flow range.

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Aeration Energy Offers Opportunities to Save

By Jess Burgess, Consortium for Energy Efficiency

Aeration systems at wastewater treatment facilities present significant, cost-effective energy savings opportunities. Aeration—the introduction of air into the wastewater stream to support anaerobic bacteria and mixing—is a key function at the majority of wastewater treatment facilities in North America. Aeration accounts for 25-60 percent of total energy consumption at wastewater treatment facilities , and a significant piece of operating budgets sector-wide.

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O₂ Automation: The Future of Bubble Mixing?

Compressed Air Best Practices® Magazine interviewed Kris Drewry from O₂ Automation and Pulsed Hydraulics Inc.

We have industrial accounts where we mix chemicals and acids. Our favorite is blending wine and spirits using compressed nitrogen. The old way to blend was to use “air rousing.” This was done by installing rows of perforated pipes in the bottom of the tank and attaching an air pipe to this grid. Since the typical mixing cycle was 45 minutes, copious amounts of air and energy were used.

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Adaptive Control for Low Pressure Wastewater Treatment Air Systems

By Roy Stuhlman, Kaeser Compressors, Consultant and an instructor for the Compressed Air Challenge® and Stephen Horne, Kaeser Compressors for the Compressed Air Challenge®

In recent years, there have been many changes in wastewater treatment. Most modern processes control three cycles: DO, NH4, and NO3, and all of the processes require high volumes of air. Undeniably, the low pressure air system uses more electrical power than the rest of the wastewater treatment plant combined. The blower packages in these systems can be equipped with low noise enclosures, fixed speed or variable speed drives, and can include all the instrumentation needed for self-protection.

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Value in Valves – Why a Compressed Air Control System is Worth a Look

By Paul Humphreys, Vice President Communications and Branding, Atlas Copco Compressors

A large multi-service public utility provider was faced with an ongoing problem. The utility, which services 93,000 retail and wholesale customers, employed five oil-free compressors at one power generation facility, but, if they needed to take down Unit 2 at the facility, it almost always pulled Unit 1 down with it, overloading the system’s capacity and causing service interruptions.

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Black & Veatch Provides Guidance to WWTP Design

By Rod Smith, Compressed Air Best Practices® Magazine

Compressed Air Best Practices® Magazine interviewed Ms. Julie Gass P.E., Lead Process Mechanical Engineer, from Black & Veatch on trends in the wastewater treatment industry especially pertaining to new technology aeration blowers and energy efficiency.

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A Compressed Air Management System for Five Compressors

By Don van Ormer, Air Power USA

This building products factory spent an estimated \$240,000 annually on energy to operate the compressed air system at their Midwestern facility. This figure will increase as electric rates rise from their current average of 7.8 cents per kWh. The set of projects recommended, by the system assessment, reduced these energy costs by an estimated \$104,336 or 43% of current use. Project costs totalled \$73,000, representing a simple payback period of 8 months.

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