The System Assessment
Food
Parrheim Foods, a division of Parrish and Heimbecker, is an innovative starch, protein and fiber
Plastics
A plastic product manufacturer spends an estimated $245,000 annually on electricity to operate the
Paper
Rockline Industries is one of the largest global producers of consumer products, specializing in
Printing
Several days prior to our visit, during a cold winter evening, the lead air compressor in one
Pharmaceutical
A large pharmaceutical company needed huge flow rates of 30 psig air to aerate multiple
Auto
Compressed air optimization measures adopted by PTMSB have reduced the consumption of compressed
Bulk
The Lafarge Cement Distribution terminal located in Winnipeg, Canada has significantly reduced the
Transit
In aerospace manufacturing, tiny details matter most. For instance, if proper torque is not applied
Metals
The company specializes in fabrication of precision assembled customized parts for OEM’s and
Medical
In the U.S. as an example, the NFPA has taken the view that if your compressor draws in good clean
Power
Nuclear power plants produce electricity for people, business and industry. Electricity is
Oil & Gas
Petro Chemical Energy, Inc. (PCE) specializes in energy loss surveys for the refining and chemical
Wastewater
Aeration tanks use bubble diffusers to distribute oxygen within the wastewater. Fine bubble
There are many choices of compressor technology and types of controls that can be used for variable demands. Some examples are rotary screw compressors with inlet valve control: variable speed drives: load/unload control; or centrifugal compressors with variable inlet guide vanes. However, in many cases, the efficiency of the overall compression process can be reduced significantly during lower flow demands, leading to more power per unit of air flow being delivered. It is very important to evaluate different available options and see how a plant can run most efficiently.
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Larger air compressors, typically over 500 hp, in refineries, pulp and paper plants, chemical and other processing plants often have high-speed, multi-stage air compressors called “centrifugal” air compressors. As seen from a total system perspective, they are not much different than screw air compressors. They compress air to plant pressure from atmospheric conditions, and deliver it to the dryer. These types of air compressors have no internal wearing parts, besides bearings and seals, and are very reliable and efficient, at their best efficiency point.
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The facility uses a large amount of electricity to manufacture laminated glass in the autoclave process. This process is the largest consumer of compressed air in the facility which made compressed air a major target in reducing energy costs for the facility. As the volume of compressed air in the autoclave is significant, the system is constantly pressurized with large 150 HP air compressors to reduce production times and fill times of the autoclave.
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An electronics manufacturer with a very large compressed air system recently had a compressed air audit done in their plant to assess system efficiency. The audit discovered the system had been designed to be extremely efficient, yet some previously undetected problems were causing less than optimal operation. Despite being located in a tropical environment, this plant utilizes heat recovery to help reduce the overall energy consumption.
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