Rockford, IL

One of the largest machine tool companies in the world, Ingersoll Milling Machine Company, installed a cogeneration facility and saved over 30% on their energy costs the first year of operation. This system consists of five 650 kW Caterpillar natural gas fired engines with heat recovery steam. The total system can produce 4.9 MW of electricity and 15,000 lbs./hr of low-pressure steam. Ballard Engineering was awarded an ASHRAE Energy Performance Award in 1988 for this project.