Solution at a Glance:
Continuous Energy Oversight Saves $400,000 Annually at Hackensack Meridian Health Hackensack University Medical Center
As part of Hackensack Meridian Health Hackensack University Medical Center’s efforts to reduce energy consumption at least 20 percent, plant operations is improving energy use in its district cooling and heating system. The central district cooling system is made up of four central chilled water plants, which provide 8,400 tons of cooling to multiple critical facilities. The multi‐fuel central utility plant consists of electric centrifugal chillers and a 1,600‐ton steam turbine. The 3,000‐hp central boiler plant generates a maximum of approximately 51,000 pounds per hour of steam for the medical center’s facilities.
With other efficiencies planned for the future, including equipment and optimization upgrades to the boiler plant, the Plant Operations Department still wanted to look into additional steps to reduce Hackensack University Medical Center’s central utility plant operating costs.
The Solution: Continuous Energy Oversight
With this goal in mind, the Hackensack University Medical Center’s infrastructure leader and Head of Plant Operations looked for an opportunity to work with an energy advisory firm with expertise in analyzing utility rates and experience operating energy plant and metering systems. HUMC selected utiliVisor Energy Plant Services, which specializes in oversight of energy systems for healthcare and other mission‐critical facilities. The company implemented a “Real Time” web‐based metering and monitoring system in the plant and uses it to oversee, analyze, and report on the facility's HVAC systems and utility management.
Some of the duties the utiliVisor team is responsible for include:
- full-time monitoring of chiller and boiler plant operations
- energy forecasting based on performance models of existing equipment operations.
- providing “real-time” energy use data
- tracking actual chiller performance vs. part load design performance
- training Hackensack University Medical Center’s engineering team
- analyzing electric vs. gas utility rates to determine which system is most cost‐effective
Added Benefits: Predictive Analysis Plant Forecasting
Hackensack University Medical Center’s continuous energy monitoring provider also employs a predictive analytics tool, the added benefit of which is an even deeper understanding of plant operations and energy needs. Based on prior performance metrics, the predictive analysis models forecast the optimal sequence of equipment operation in conjunction with utility rates for chilled water plants and boiler plants. The tool is able to predict the building’s cooling and heating loads within 5 percent of actual loads; this helps operators sequence the right equipment while maintaining the lowest demand value month-to-month.
Hackensack University Medical Center central utility plant operators can view a graphic matrix of this information through a user portal, and receive alerts when plant efficiency drops below target. In central plant operations alone, HUMC has achieved savings of more than $2,800,000 since 2010 through continuous energy oversight.