The compressor may be the ‘heart’ of a HVACR system, but it is a constantly changing component. What types of compressors will dominate the market in the future?
Gregory Johnson, strategic global marketing manager for Danfoss Air Conditioning, sized up the relationship of rotary to scroll. “There are two technologies: rotary compressors for mini-splits and multi-split systems, and scroll compressors that are dominant in light commercial and commercial systems. These are now the primary technologies used in U.S. ducted split systems.”

He noted, “Rotary compressors are popular in small systems because they are cost-driven, quiet, small and reliable. They are not the most efficient compressors on the market today. Their capacity is primarily up to 3 tons.” He added, “Scroll compressors are very popular with R-410A refrigerants and in overseas applications. They are more efficient and reliable in the demanding unitary applications. “Looking ahead in the residential market, the conversion to R-410A in 2010 favors scrolls. Scrolls have been gaining market share. We expect that trend to continue.”

Modulation is what seems to matter when it comes to the newest aspect of compressors. “Modulating scroll compressors are increasing in use in the commercial refrigeration industry due to their versatility, reliability and energy saving benefits,” said Jim Mozer, vice president of marketing, Emerson Climate Technologies, Refrigeration Division. “Digital scroll offers an innovative way to modulate the capacity of the compressor from 10 to 100 percent so that output precisely matches the changing cooling demand of the room.” 

According to ACHRNews, contractors and technicians need to keep up with changes through training offered by manufacturers, supply houses, trade associations, vo-tech schools, and most any other source available. 

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