FREE COOLING CHILLERS
Cutting-edge packaged scroll chillers encompassing the benefits of advanced free cooling system, close approach evaporators, and microchannel condensers
Applications: Air conditioning • Process cooling • Commercial • Residential
The unique combination of best-in-class HVAC technologies embodied in this free cooling chiller range drives performance, reliability, and impressive low cost of ownership. Carefully elaborated free cooling system, microchannel heat transfer, and advanced control methods – all these technologies yield significant energy savings.
Ultracompact II Freecool offers a wide range of capabilities matching any customer’s applications from air conditioning to process cooling, while numerous options make it flexible and suitable even for harsh climate conditions.
10%
ENERGY SAVINGS
Ambient air temperature/humidity: 35ºC/50%rH
Water temperatures: 7/12ºC
FREE COOLING CHILLERS
Scroll chiller of classic design, Ultracompact II Freecool displays improved full- and part-load efficiency and meets the highest international energy-efficiency standards.
For small-to-medium free cooling applications, this chiller offers extra economization hours thank to its optimized free cooling concept.
Any chilled water application can benefit from free cooling, and the colder the climate, the more benefit can be achieved. Free cooling system offers energy saving by incorporating an air-to-water heat exchanger, also called a free cooling coil, into a chiller design. Free cooling coils cool down the water returning from the process before it enters the chiller evaporator when the ambient temperature is lower than water temperature. Driven by a synergy of high heat transfer rate of microchannel heat exchangers and advantages of free cooling concept, our chillers demonstrate outstanding performance and promise high power savings
PROVEN PERFORMANCE AND RELIABILITY
The combination of an energy-efficient motor and an optimized scroll wrap for refrigeration applications provides a high degree of efficiency in Ultracompact II Freecool’s compressors. Reliability is built into this compressor range, from the compliant scroll design and the engineered bearings to the simplified design. The thermal fault protection also contributes to excellent reliability.
As a predominant operating mode of typical Ultracompact II Freecool applications is part-load, particular importance was placed on low energy consumption at low saturation discharge temperatures.
Customers of Ultracompact II Freecool chillers with multiple scroll compressor technology can benefit from time-proven reliability, low sound levels, low vibration, and minor operating and maintenance costs.
BRAZED PLATE HEAT EXCHANGERS
As the evaporator approach temperature difference becomes small, the performance of the system improves, and therefore the operating cost is reduced. To keep the minimal approach temperature, we adopted the most efficient plate evaporators available today and lifted the compressor COP to save as much energy as possible.
Brazing the stainless steel plates together eliminate the need for gaskets and thick frame plates, which makes the heat exchanger compact. The special plate design guarantees a consistent braze joint at the plate overlap and makes for stronger and more leak-proof heat exchanger. The brazing material seals and holds the plates together at the contact points, ensuring optimal heat transfer efficiency and pressure resistance. Using advanced design technologies and extensive verification guarantees the highest performance and longest possible service lifetime.
Accurate control of superheat with the Ultracompact II free cooling chiller operating at part load achieved with electronic expansion valves. Fitting EEV permits a reduction in power consumption of up to 30% by controlling the refrigerant flow at reduced head pressures.
The EEV used in Ultracompact II Freecool chillers are new generation valves designed for precise liquid injection in an evaporator and includes balanced cage and slider assembly operated by direct driven motor technology. This ensures solenoid-tight shut-off in both flow directions, thus providing smooth operation of the system. The valve incorporates a powerful bi-polar motor which precisely controls flow regulation.
All-aluminium microchannel condensing coils used in Ultracompact II Freecool chiller range allows achieving the number of advantages that improve energy efficiency:
The end result is up to 40% higher energy efficiency of the chillers in comparison to those featuring finned tube coils. Furthermore, lower condenser weight and reduced refrigerant charge translate to lower unit’s cost. Based on the all-aluminium construction, microchannel condensing coils are also subject to significantly less galvanic corrosion than traditional finned tube designs, in that there are no dissimilar metals.
OPTIMIZED AIRFLOW AND MAXIMUM EFFICIENCY
Axial fans used in Ultracompact II Freecool design have outstanding characteristics in every respect, including performance and efficiency, weight, noise pollutions, and robustness.
EC fan technology is an excellent solution for demand-responsive cooling, and we equip Ultracompact II Freecool chillers with the latest EC motors which demonstrate impressive performance, low energy consumption, high torque, and durable design. EC fans with integrated electronic control can easily be varied in speed to match airflow demand. For the same air volume, they consume distinctly less energy than AC motors.
The most common cause of fan motor failure and consequent capacity reduction of the chiller is overheating. EC fans of Ultracompact II Freecool chiller have temperature sensors built into the internal electronics package that act as a safety device in the event of overheating.
Compared to AC motors, EC-type motors have a longer service life due to lower winding temperatures resulting in lower wear and tear. Comprehensive corrosion protection measures have been taken to allow the fans to be used in almost all climatic applications with outstanding operating reliability.
|
Capacity [kW] |
50 … 300 |
|---|---|
|
Design |
FREE COOLING |
|
Compressors |
SCROLL |
|
Refrigerant |
R410A |
|
Energy efficiency (EER) |
UP TO 3.26 |
|
Seasonal efficiency (ESEER) |
UP TO 4.45 |
|
Fan motors |
EC |
|
Condensers |
MCHE |
|
Free cooling coils |
MCHE |
|
Evaporators |
BPHE |
|
Evaporation control |
EEV |
|
Refrigeration circuits |
SINGLE/MULTIPLE |
|
Warranty |
3 YEARS |
