• Optimized compressor capacity control and efficiency
• Integrated compressor and electronics in order to provide a simpler, more reliable rack
• Consolidated traditional accessories into one electronic package
• Reduced maintenance costs
• Increased compressor reliability, leading to increased refrigeration system uptime
• Simplified compressor troubleshooting, reducing the time required to maintenance system
• Enabled better facility management
• Provided clear information to improve decision
Application
Parallel rack supermarket refrigeration system with Copeland™ scroll digital compressors
Customer
Price Chopper grocery stores, a part of Golub Corporation, prides itself on innovation and has made substantial investments to incorporate various green and energy-saving initiatives throughout its stores.
Challenge
Price Chopper wanted to improve its refrigeration systems to reduce energy costs, make it easier to commission and maintain, and reduce downtime. Traditional parallel racks systems separate the compressors from the electronics, leading to many electronic components and making it complicated to troubleshoot. Traditional systems do not provide the operator all of the information they need to optimize their facility.
Price Chopper installed the Copeland™ scroll digital compressor with CoreSense™ Diagnostics which they describe “as more than a refrigeration compressor with onboard diagnostics that provides real-time intelligence that tells technicians exactly what they need to know.”
Put in context of an entire store, there is a “single view into the entire network of facilities.” The package includes control and monitoring of a store’s HVACR, lighting, and other systems. Price Chopper invested in optimized air-cooled condensers that allow head pressure to float down with outside ambient temperatures, taking full advantage of the expanded compressor operating envelope for significant energy savings. Other energy-saving measures are shown in the table below.
The Copeland™ scroll digital compressor with CoreSense™ Diagnostics offers features that allow customers to experience fewer compressor failures, thereby saving cost, reducing equipment downtime, and avoiding food spoilage. By integrating several traditional components into one control module, the Copeland™ scroll digital compressor with CoreSense™ Diagnostics requires less wiring and fewer connection points, improving system quality and ensuring installation ease and consistency. Copeland™ scroll digital featuring CoreSense™ Diagnostics enables consistent installations and cost savings, with fewer components, less wiring and a smaller number of connection points, so installation is simple and fast.
With this breakthrough technology, you can centralize compressor-monitoring operations, allowing technicians to troubleshoot compressor problems before traveling to the site. And you can even dispatch technicians automatically if there’s an alarm problem.
| Scenario | Base | LEED | ||
| Condenser | Air-cooled, sized for 12 degrees F and 15 degrees F LT and MT condenser TD respectively | | Air-cooled, sized for 10.2 degrees F and 12.6 degrees F LT and MT condenser TD respectively | |
| Condenser fan control | Fan cycling based on discharge pressure | Variable speed fans based on temperature difference between condensing condenser air-on and saturated temperatures | ||
| Condensing pressure minimums | 85 degrees F | 70.0 degrees F | ||
| Refrigerant conditions | 5 degrees F ambient subcooling exiting condenser, 60 degrees F return gas superheat to compressors LT and MT | 5 degrees F ambient subcooling exiting condenser, 60 degrees F return gas superheat to compressors LT and MT | ||
| Optimized suctions | Two LT (-22 degrees F and 12 degrees F) and two MT (+24 degrees F and +13 degrees F) suction groups | Two LT (-22oF and 12oF) and two MT (+24 degrees F and +13 degrees F) suction groups | ||
| Compressor capacity control and efficiency | Conventional unloaders, resulting in average 65% compressor efficiency | Digital unloaders and factory compressor control resulting in average 68% compressor efficiency due to reduced unloading penalties | ||
| Dairy cases | Conventional open multideck case | Reachin glass door cases |
Operating Hours: 8AM-5PM EST, Monday - Friday
