The New York State Energy Research and Development Authority (NYSERDA) sponsored an independent study, “Rudin Management: Using Real-Time Energy Management to Optimize NYC Commercial Building Operations” to identify real-world best practices in optimizing building operations with a real-time energy management (RTEM) system.
The Rudin Management Company was the subject of this study because it operates one of the largest privately-owned real estate portfolios of Class A commercial properties in New York City. Plus, the company develops and integrates RTEM systems to optimize building operations and ensure tenants’ comfort. From 2012, to 2018, NYSERDA monitored the energy and cost savings in eight Rudin NYC properties before and after the company employed the NantumOS RTEM system.
The company’s RTEM experience started in 2012 when it participated in a pilot deployment of Di-BOSS™, an in-house RTEM system that was developed in partnership with an integrator. The information gained from using Di-BOSS helped further commercialize the RTEM system and develop the NantumOS. NYSERDA assessed Rudin’s use of NantumOS to optimize building operations. Consolidated Edison’s (Con Edison) electric utility meter data for the eight Rudin properties was upgraded in 2016 to NantumOS and analyzed with standard industry techniques.
The case study compared Rudin’s properties’ daily and seasonal consumption patterns before and after the 2016 NantumOS upgrades were made in order to find operational differences and impacts in electricity consumption. The study found the ways to minimize energy usage by observing Rudin’s operational processes when it used NantumOS. The best practices for decreasing energy use included:
• Scheduling a building mechanical system start-up at the beginning of each day
• Automatically adjusting the building’s mechanical system capacity based on the building’s actual occupancy during the day.
When the study concluded, Rudin management reported the initial Di-BOSS deployment saved an average of 12% in 11 commercial buildings in 2014, equal to more than $5 million in savings for the Rudin commercial portfolio at the time. The upgrade to NantumOS from Di-BOSS in 2016 resulted in weather-normalized savings from 4.2% to 16.8% during the occupied days on non-holiday weekdays, and from 6% to over 22% savings during non-occupied days on weekends and holidays. The saving levels were in addition to the savings Rudin had already discovered with Di-BOSS. For some buildings, Di-BOSS and Nantum OS saved a total of more than 30% from 2012 to 2018.
Although the savings were significant, NYSERDA determined that the eight Rudin properties picked for the study were well-orchestrated buildings before they upgraded to NantumOS and commercial properties that were either new to RTEM or had not yet integrated it into their daily operations could save even more.
Instead, NYSERDA found that NantumOS’ non-energy benefits could bring more value to the Rudin Management Company. Some of the non-energy benefits NantumOS could offer include:
• NantumOS serves as a tool for executives to encourage organizational commitment to energy management.
• NantumOS’ automated predictive capabilities reduce manual errors and missed opportunities
• NantumOS frees building staff from routine monitoring so they can address issues that impact tenant satisfaction.
• NantumOS preserves staff experience and knowledge for the next generation of building leaders.
• NantumOS establishes energy saving practices as repeatable processes regardless of the differences between buildings.
Click here for a copy of the NYSERDA Rudin Management case study.