April 9, 2013
Lehigh Hanson’s Mission Valley Rock plant in Sunol, California, reduced it energy intensity by 12.2 percent in one year, achieving the U.S. Environmental Protection Agency’s (EPA) Energy Star Challenge for Industry.
As a result of the accomplishment, the plant also reduced its annual source energy use by 28,987 mmBtus and its annual CO2e use by 817 MT.
In order to reduce the plant’s energy costs, plant management and personnel at the company’s technical competency center in Irving, Texas, completed a comprehensive review of the major systems at the plant, including crushers, conveyors, pumps, screens, feeders, fans, heating, air compressors and more.
Plant management used the findings to plan and implement energy-related projects, which included process improvements, energy optimization strategies and equipment installations such as hot oil economizers and variable speed drives. The plant also shifted some of the production tasks, reducing loads at peak times, and set monthly demand control targets.
The Mission Valley Rock plant is the first aggregates production site to achieve the Energy Star Challenge for Industry.