Last year, an industrial manufacturing facility reached out to us for an energy audit of their three coolant pumps. From this audit, they hoped to identify potential projects or Energy Conservation Measures (ECMs) where energy, resources, and costs have the potential for reduction. ECMs are proposals for individual projects, each requiring individual engineering and project development. The audit also identifies opportunities with the potential to immediately impact the plant with minimal or no cost of implementation.
After performing the energy audit, our highly skilled technicians suggested that the facility should implement new VFDs on their three 100hp pump applications. The facility only operates two of these pumps at a given time. These applications were throttled to 35% and 65% open, and they were pulling full load power. By implementing VFDs, users can control the flow by providing variable speed pump operation. This results in reduced system pressure and function, and maintenance costs will also be reduced.
The total for completing the recommended project came to a cost just under $100,000. This figure represents a simple payback period of approximately 2 years. A comprehensive annual energy reduction of 700,000 kWh/year was achieved through the implementation of the ECM.