Emerson Unveils Variable-Speed Compressors, Suited for Self-Contained R290 Cases

St. Louis, Missouri (U.S.)-based Emerson has announced the introduction of its Copeland variable-speed reciprocating hermetic compressors for commercial refrigeration applications, including self-contained propane (R290) display cases.

The new models are “specifically engineered to save energy and provide performance improvements” for medium- and low-temperature stand-alone coolers and freezers, used in restaurants, convenience stores and small-format food retailers, said Emerson.

This will help prepare commercial refrigeration OEMs for energy regulations from the U.S. Department of Energy (DOE), which will soon be proposing its next phase down in energy usage for these applications, likely to take effect in 2024, Emerson noted. It will also enable OEMs to meet the U.S. Environmental Protection Agency’s Energy Star certification levels.

Emerson added that OEMs that use R290 refrigerant “can offer their customers a more sustainable refrigeration option that meets some of the most stringent refrigerant and energy-efficiency regulations, including the potential impending 2024 DOE standard, California Air Resources Board standards and potential Environmental Protection Agency refrigeration requirements.”

The Copeland variable speed reciprocating hermetic compressors for refrigeration consist of two components:

• Copeland variable-speed reciprocating hermetic compressor, available in ranges from 1/8 to 7/8HP, which features a brushless permanent magnet motor, versus a standard induction motor.

• Copeland variable-speed drive, which has a smart controller integrated within.

While assisting its OEM customers in the redesign of their systems at Emerson’s test labs, Emerson found that the variable-speed compressors increased system energy efficiency by 13%, reduced compressor cycling by 90% and lowered compression ratios by 43% compared to a high-efficiency fixed-speed system using R290. “This means faster pulldowns to setpoint temperatures, more precise temperature holding, less wear and tear on system components and lower energy bills,” said Emerson.