Supermarket refrigeration

With the approaching HFC phasedown, the demand for environmentally friendly cooling systems is driving chiller manufacturers to innovate. Washington-based Pro Refrigeration, Inc., a leading manufacturer and supplier of chillers for the industrial and beverage processing market, including the dairy, beer and wine industries, recognized an opportunity with CO₂ chillers.

Before digging into the secret of Danfoss adaptive defrost, let’s first take a look at the most common methods of defrosting refrigerated display cases, and why they’re necessary.

Like any supermarket chain, Giant Eagle operates in a very competitive marketplace where energy management can be a crucial ingredient to success and profitability. That’s why the Pittsburgh, Pennsylvania-based chain carefully manages its stores’ critical energy consumers: lighting, refrigeration, and HVAC equipment. When Giant Eagle learned its utility—PJM Interconnection—offered a demand response program that provided incentives to reduce electric consumption, they talked to Danfoss to see how they could take advantage of the opportunity.

Looking to evolve its refrigeration strategy to anticipate evolving refrigerant regulations and reduce cost, supermarket chain Weis Markets partnered with Danfoss to slash the global warming potential of its refrigeration systems by deploying its first transcritical CO₂ refrigeration system.

Danfoss has pioneered two control algorithms that help you achieve this balance. The Minimum Stable Superheat (MSS) algorithm has been an important part of the Danfoss ADAP-KOOL^® offering for years and is still the ideal choice for adaptive evaporator control for dry expansion. Now Danfoss introduces the next generation: Adaptive Liquid Control (ALC).

Intelligent control solutions are important for achieving reliable, optimized operation and realizing financial savings and environmental benefits in your transcritical CO₂ refrigeration solution.