Press Release Summary:
Incorporating single screw compressors with motor, EWWD range of chillers are optimized for use with R-134a refrigerant. Products are available in 7 different sizes with capacities ranging from 360 kW to 1.1 MW, and EER values from 5.2-5.35 at full load. Chilled water is supplied between 4-16Â°C with leaving condenser water temperature between 30-50Â°C. Chillers modulate sliding valve position and enable compressor to match capacity requirements.
Original Press Release:
Daikin Increases Chiller Capacity Range up to 1.1MW with High (5.2 to 5.35) EERs
A new EWWD range of high efficiency flooded type, water cooled chillers has been introduced by Daikin Europe N.V. Launched at November's IKK Exhibition, the cooling only unit with stepless capacity control operates on R-134a refrigerant
Seven different sizes are planned with capacities ranging from 360kW to 1.1MW and impressive EER values of between 5.2 and 5.35 at full load, rising as high as 8.0 at 50% part load. Chilled water is supplied at between 4 and 16° C with a leaving condenser water temperature of between 30 and 50° C. For process or ice-storage applications chilled water down to -5° C is optional.
A major factor influencing the unit's high performance capability is its use of the recently introduced Daikin 'GE' type stepless controlled, single screw compressor with high efficiency motor, optimised for use with R-134a. Modulating the sliding valve position according to chilled water temperature enables the compressor to match capacity requirements closely, resulting in high part load efficiencies and stable chilled water temperatures with better control regulation. Capacity control of the single circuit EWWD unit in fact, is infinitely variable between 25 and 100%.
With the emphasis on energy efficiency and part load performance, the use of single circuit flooded evaporators provides many overall advantages. A performance rating some 30% higher than comparable direct expansion chillers plus qualification for an 'A' class EUROVENT rating stem from computer modelling of the heat exchanger, ensuring the availability of optimum refrigerant volume at any given flow rate. Carefully conceived components include flooded shell and tube evaporator fitted with internally and externally enhanced copper tubing. This tubing also features in the shell and tube condenser, along with a special header distribution system and an integral sub cooler section.
Overall electronic control is provided by Daikin intelligent adaptive control, complete with LCD touch screen panel offering detailed information on and precise regulation of all operating parameters. Temperature control to within +/- 0.5 deg C and lead lag compressor control are provided along with current limiting or demand function and alarm and predictive maintenance history. Options available include dual setpoint, DIII Net connection for use with Daikin I-manager and remote monitoring via the Daikin Airnet. LON communication to an external BMS system is optional.
The common Daikin control platform opens up the possibility of communication with VRV and other Daikin DX products, once more affirming Daikin's future commitment to develop total project solutions.
Daikin Europe N.V,