Emerson Climate Technologies is set to release a digital version of its Copeland Scroll K5 refrigeration compressor.
The new Copeland Scroll K5 digital compressor for low- and medium-temperature refrigeration provides added flexibility for new applications in the 7.5 to 15hp range, as the current Copeland Scroll digital used in refrigeration is limited to 6hp.
The current compressor incorporates two important features that deliver significant system efficiency advantages.
The first is variable volume ratio technology, which optimises low-condensing performance.
The second is enhanced vapour injection capability for maximum capacity at low set points without having to add more or larger compressors.
Emerson has installed thousands of its current model compressors around the world, assisting supermarkets, grocery and convenience stores to reduce their refrigeration-related energy expenses by up to 10 per cent.
The new Copeland Scroll K5 Digital refrigeration compressor incorporates a variety of standard features that deliver additional and significant system efficiency advantages, the company says. These include:
* 10 to 100 per cent capacity modulation, which allows for extremely precise temperature and pressure control resulting in energy efficiency improvements and cycling reduction;
* Enhanced vapour injection capability, which increases system capacity by 50 per cent and efficiency by 20 per cent on average at low temperature rating condition;
* CoreSense diagnostics, which provides advanced protection, monitoring capabilities and maintenance cost savings;
* Discharge temperature control – the CoreSense module controls liquid injection via electronic expansion valves, cooling the compressor when required; and
* Digital solenoid control – CoreSense cycles the digital solenoid based on the required capacity signal from the master controller, eliminating the need for a separate digital controller.
Emerson’s food retail manager, Mitch Knapke, says not only will the new digital compressor improve temperature control, efficiency and reliability, it will reduce the number of SKUs contractors will need to keep in stock.
Moreover, it is approved for use with R404A, R407A/C/F, R134a and R22. It is designed for use in both stand-alone and parallel systems.
Portfolio expansion
Emerson Climate Technologies has expanded its portfolio of electronic controllers, expansion valves and system protectors, all designed to work together in subcritical and transcritical systems that use CO2 as their refrigerant.
In the area of facility management systems, Emerson has an E2 controller, designed to provide complete control of HVAC units, refrigeration racks, condensers and lighting, which is now capable of controlling and providing remote visibility of the entire CO2 cascade or booster system.
Recent updates to the E2 refrigeration controller include CO2 suction group control and compressor synchronisation for booster systems.
Emerson also provides CO2 leak detectors that interface with the E2 and can alert individuals of potentially hazardous conditions.
Emerson’s CX valves are compatible for use with transcritical CO2 pressures and EX valves for use with subcritical CO2 pressures.
Common applications include the high pressure and bypass valves in CO2 booster systems and heat reclaim valves for larger loads such as walk-in coolers and freezers.
Emerson says it has developed a wide range of valves, controls and system protectors that fulfil the requirements of all common CO2 applications.
Offerings include UL recognised oil controls, filter driers, moisture indicators, solenoid valves, check valves, ball valves, pressure controls and transmitters.
Knapke says implementing a CO2 system is not without challenges, specifically higher pressures, up to 1500psi.
For more information go to www.emersonclimate.com/CO2.