Air cooled chiller Airwell 350 kW
- Brand: Airwell
- Power: 350 kW
- Year: 2012
| Version | superlovnoise |
| Air flow | 350 kW |
| Refrigerant circuit | 2 pcs. |
| Type of refrigerant | R410A |
| Compressors | 4 pcs. Copeland (scroll) |
| Number of fans | 8 pcs. |
| Hydraulic module | water pump, buffer tank, expansion vessel |
| Dimensions | 4 х 2,2 х 2,55 m. |
| Weight | 3780 kg. |
| Condition | excellent |
Features & Strength Points
The new AQWL units have been designed to operate with HFC 410A refrigerant. Both compressors and heat exchangers (plate heat exchanger and coils) have been optimized for this refrigerant. All the units are available either in cooling only or heat pump version. Each unit consists of two independent refrigerant circuits and is complete with high efficient and high technology components :
– Hermetic Scroll compressors with high efficiency and low vibration emissions,
– Electronic expansion valves,
– “True dual” circuit plate heat exchanger,
– Quiet fans located in externally mounted nozzle profile housing generating low sound levels,
– Controller using a state-of-the-art microprocessor.
A more “slim and light” structure, while keeping the features of sturdiness (successfully performed at CESI laboratory, vibration tests in accordance with ASTM standards).
Rivets as joints of the structural elements.
Optimization of overall dimensions for container transport.
Symmetric refrigerant circuit configuration to reduce the length of pipes and consequently the pressure drop in the circuit.
Standard coils in Al/Cu, arranged in V configurations to get a better air distribution and then optimize its performance.
Increasing the fin spacing to reduce fouling problems in cooling mode and increase the drainage-ability in heat pump mode (defrost).
Units with EER (AQWL complete unit) values higher than 2.9 (Energy efficiency class B) and COP values higher than 3.2 (class A) in heat pump versions.
All the versions keep the same configuration of the base units (same structure, electrical board, compressors and coils). Easy upgrade of the units in stock or on the field.
Bi-flow electronic expansion devices on all units : superheating value controlled by microprocessor, simple and accessible refrigeration system especially for heat pump versions with reduction of brazing points and then possible leakage.
Optimized coils design (30% refrigerant charge reduction).
Compressors box STD on all units – additional compressor jackets for ELN version (Easy upgrade of the units in stock).
Special version (HSE) for high seasonal efficiency : ESEER higher than 4.5 (15% more than the STD version); and special version (HT) for high operating limits. Both versions are equipped with axial inverter fans of large diameter (electronic brushless type motor).
Special version (HPF) for high available static pressure (max. 120 Pa) with inverter fans (electronic brushless type motor). Axial fan of large diameter.
Hydro kits with or without buffer tank (750 and 1000 litres) fitted on board of the chiller to perform outstandingly the package solution and the plug & play concept.
One or two water pumps are available : standard pressure (150 kPa) or high pressure (250 kPa). The water pump has a sound proof box for ELN version.
For safety purpose when performing service operation, special valves dedicated to R410A are supplied on the refrigerant system. These valves, of 5/16″ flare SAE type, are mounted on the liquid line and on the gauges manifold of the unit.
Range available in STD (BLN, LN, ELN), HSE (BLN, LN, ELN), HT (BLN) and HPF (BLN) version.
High power hermetic scroll compressors arranged in tandem and trio configuration.
New “dual circuit” plate heat exchangers at higher efficiency that replace the previous versions.
Extra Low Noise (ELN) : The units are equipped with star connected fan motors, fitted with a speed controller which allows the units to operate with a very low rpm. The chillers are supplied with compressors box and soundproof jackets on compressors reducing significantly the noise emissions.
Compressors
Each unit is equipped with 4 scroll compressors arranged in tandem or trio configuration per refrigerant circuit.
The compressors are fitted with an electronic control device which ensures protection of compressors against :
– overheating and overloading,
– reversal rotation and phase loss.
All compressors have direct-on-line starting and are mounted on rubber vibration isolators in order to minimize noise and vibration transmission.
Evaporator
Evaporator is of a “Dual Circuit” brazed stainless steel plate type heat exchanger. It is insulated with a 19 mm thick closed cell polyethylene foam material and is fitted with a film type electric heater on the external surface to prevent the unit from freezing at a low temperature (down to -18 °C) when the unit is off.
Water connections of heat exchanger are of a 3″ Victaulic type for all units. Each unit is provided with additional 4″ fittings for hydraulic connections between plate heat exchanger and plant.
