In February, 2009, Pacific Natural Foods of Oregon was preparing to undergo a large production upgrade and remodel of their Tualatin, Oregon facility. New process equipment was being moved, upgraded, and reorganized. The compressed air system came under scrutiny for the valuable production space it occupied in the plant and also for maintenance and reliability issues. Although compressed air demands were not expected to increase, it was determined an audit of the compressed air system would provide insight to improve the system and save energy.
Rogers Machinery Company, Inc. was selected to perform the energy audit of the existing baseline system. Data was collected during a typical two week period. The power (kW) consumed by each compressor as well as pressure (psig) at various locations were monitored through the plant.
The data showed significant pressure drop across the multiple buildings of the facility. The data also showed the existing compressors were not working together which caused erratic pressure fluctuations and maintenance issues.
While taking into account the requirements of Pacific Food Maintenance and Engineering staff, Rogers Machinery proposed an Energy Efficient Measure (EEM) to improve the compressed air system by reducing energy consumption while lowering and stabilizing plant pressure.
After the new system was properly installed and tuned, Rogers Machinery returned to verify the savings through the same process as before, by monitoring power consumed and pressure at the same locations.