Central Plant Optimization Strategy
Preliminary Technology Assessment
What is This Technology?
This central plant control technology is designed to optimize energy use in chilled water systems. To reduce energy consumption, chillers, cooling towers, and associated pumps are operated as a single system. In combination with the necessary Variable Frequency Drive (VFD) equipment, this technology applies a control algorithm to maintain optimal differential system pressure, reducing pumping energy and equipment runtime.
Why is GSA Interested?
Approximately 75% of GSA space-cooling energy is consumed by central cooling plants. Over the past decade, many of those cooling facilities have become equipped with the VFD technology that would enable them to take cost-effective advantage of this holistic approach to chilled water system optimization and reduce energy use. This project is the second phase of an assessment begun as part of GPG’s FY11 program, evaluating a different manufacturer’s product in a different climate zone.
COST EFFECTIVENESS Given an optimum facility design where cooling plant equipment already has VFD functionality, this technology is projected to be life cycle cost-effective in all climate zones under current utility rates.
If you have questions or need additional information, contact the Green Proving Ground Program at GPG@gsa.gov.