|Ani Jayanth | Director, Product Marketing
Emerson Commercial & Residential Solutions
This blog summarizes an article from our most recent E360 Outlook, entitled “Less Is More.” Click here to read it in its entirety.
Foodservice refrigeration equipment manufacturers will have a complex regulatory landscape to navigate in the coming years. In 2018, the Environmental Protection Agency (EPA) will be phasing out the use of R-404A in new remote condensing units for walk-in coolers and freezers (WICF). Then, the Department of Energy (DOE) has proposed the enforcement of its new WICF efficiency mandate in 2020, as measured by the annual walk-in efficiency (AWEF) standard. The challenge for foodservice OEMs is to design new condensing units and stand-alone equipment that comply with both requirements.
Emerson’s new ¾ to 1½ horsepower (HP) offerings extend the existing Copeland Scroll ZF*KA and ZB*KA compressor lines, allowing OEMs to combine compliance into a single design cycle for smaller low- and medium-temperature applications.
With the EPA’s proposed phase-down of hydrofluorocarbon (HFC) refrigerants with higher global warming potential (GWP), new refrigeration platforms must be designed to accommodate the performance characteristics of lower-GWP alternatives. Accordingly, our new fractional HP Copeland Scroll compressors are rated for use with new alternatives R-448A/449-A as well as existing lower-GWP HFCs such as R-407A.
Liquid-injected for low-temperature efficiencies
Walk-in freezers that rely on outdoor condensing units will require compressors that can mitigate the higher discharge temperatures produced when using new refrigerant alternatives in low-temperature applications. The Copeland Scroll ZF*KA fractional HP models utilize liquid-injection technology to cool discharge temperatures and reduce compressor stress. Compared to hermetic reciprocating compressors that will require additional modifications and heat-reduction strategies, Copeland Scroll technology is well-suited for these low-temperature scenarios.
Copeland Scroll ZF*KA fractional HP compressors are the basis of Emerson’s X-Line outdoor condensing unit, enabling it to simultaneously meet both DOE (AWEF efficiency) and EPA (lower-GWP refrigerant) requirements in low temperatures.
Wide applicability in medium temperatures
For medium-temperature, walk-in coolers, the new fractional HP ZB*KA compressors deliver enhanced AWEF efficiencies in WICF condensing units. It’s important to note that incumbent hermetic reciprocating compressors cannot achieve the same efficiencies without modifications to other system components (e.g., coils, cooling fans, etc.). Patented Copeland Scroll technology enables significant efficiency improvements in medium-temperature WICF applications without investments in additional components or incurring engineering, design and development (ED&D) costs.
The new ZB*KA compressors represent an extension of the medium-temperature line of compressors to better serve today’s wide range of walk-in cooler requirements. OEMs can now integrate reliable Copeland Scroll technology into their complete lineup of walk-in refrigeration equipment, while achieving compliance with environmental and energy-efficiency regulations.
By addressing both EPA and DOE compliance requirements, fractional HP Copeland Scroll compressors help simplify the design cycles for foodservice refrigeration OEMs.