Caesars Entertainment operates more than 50 properties worldwide with over 55 million-square feet of conditioned space. The company is working toward energy reduction goals of 25% by 2025 and 40% by 2030, measured on a per-square-foot basis against a 2007 baseline. Caesars Entertainment facilities need to be working and available all day, every day for multiple uses, which makes reducing energy consumption without impacting the guest experience challenging.
In 2015, Caesars initiated a comprehensive ventilation upgrade and chilled water plant optimization pilot at its Paris Hotel & Casino. A preliminary study was completed to identify modernization opportunities to reduce energy. A project scope included replacing outdated controls with an open-protocol BACnet platform capable of optimized sequences of operation as well as the conversion of chilled water, condenser water, and air handling systems to variable speed operation. The project also called for the installation of a 1,200-hp variable speed drive on one of five large chillers.
This project demonstrated the integration of technology into an existing building without fully replacing equipment and spending millions on a complete control system upgrade. A unique aspect of the project was migrating from a common primary-secondary chilled water configuration to a variable primary and variable secondary system using the current piping configuration, the company says. This reduced cost and limited the complexity of control sequences. There was also seamless integration of new control components with a proprietary legacy system using a dedicated integration device. A monitoring platform was installed using custom algorithms to perform ongoing fault detection and commissioning to minimize “efficiency drift,” while providing remote access.
The project successfully reduced peak electrical demand by 635 kilowatts and is saving more than 5.5 million kilowatt- hours per year. Economically, the project yielded a post-tax internal rate of return of 23% and is delivering over $440,000 per year to the bottom line. A similar project was initiated at Caesars Palace in late 2016 and is currently undergoing final commissioning. Projects like these, coupled with operational strategies and employee engagement, have allowed the company to reduce energy by 23.4% and greenhouse gas emissions by 28.3% per- square-foot from 2007 through 2015.