In 1998, a compressed air system improvement project was implemented at the Mobil lubrication plant in Vernon, California. The compressed air system was modified because the plant was retooled into a distribution facility that uses comparatively less energy. The project reduced the plant's compressed air energy costs by 25 percent, as well as reducing production and maintenance costs. This was accomplished by substituting a new 50-horsepower (hp) rotary-screw compressor with load/unload controls for two 200-hp compressors and two aging 50-hp compressors. The increased efficiency and reliability of the compressed air system made the plantâ€™s
production process more reliable. The total cost of the project was $23,000, and the annual savings were $20,700, leading to a simple payback of approximately one year. The plant also avoided $52,000 in costs by implementing this cost-effective, internallydeveloped
project instead of one that a local engineering company recommended.