High efficiency motors & drivesCosts & Benefits
|Parent Process: Cement Plant General|
|Energy Savings Potential||
Power savings may vary considerably between different plants, ranging from 3 to 8%.
By retrofitting 13 motors with high efficiency ones a cement plant in Davenport, California, has saved 2.1 MWh of electricity annually.
|CO2 Emission Reduction Potential|
For a 5000 tons per day plant, it is estimated that replacing all motors in plant fan systems with high-efficiency motors costs US $0.22 per annual ton of cement capacity.
The cement plant in Davenport, California, has reduced its annual energy and maintenance costs by US $168 000 and US $30 000 annually. The implementation costs amounted to US $ 134 000 (including a rebate from the local utility company) giving a payback time of around 8 months.
High efficiency motors & drives Publications
The U.S. Environmental Protection Agency’s (EPA) energy guide, Energy Efficiency Improvement and Cost Saving Opportunities for Cement Making, discusses energy efficiency practices and technologies that can be implemented in cement manufacturing plants. This ENERGY STAR guide provides current real world examples of cement plants saving energy and reducing cost and carbon dioxide emissions.
High efficiency motors & drives Case Studies
A motor system improvement project was completed at the CEMEX cement plant in Davenport, California, in June 2004, where 13 motors were retrofitted and resulted in annual energy and energy cost savings of more than 2 million kWh and US $168,000.