AlfaBlue Junior XG
AlfaBlue Junior is a competitive gas cooler line that offers excellent performance, allowing easy installation on site and an outstanding integration with other components. Highly efficient fan motors combine excellent sound characteristics and low energy consumption. AlfaBlue Junior XG gas coolers have been specifically designed for CO2 refrigerant systems.
- Finned coil
An innovative coil design based on K65 tubes, Cu alloy connections and corrugated aluminium turbo fins provides excellent heat transfer. Standard fin spacing 2.1 mm. Circuiting design is fully optimized to the thermodynamic properties of CO2. Each heat exchanger is leak tested with dry air and finally supplied with a nitrogen pre-charge.
Patented coil frame design allowing thermal expansion and offering protection against vibration (f.i. during transportation). Corrosion resistant casing material, coated RAL9002. Separated fan sections.
High efficiency AC or EC fans with innovative polymeric fan blades and low power consumption. Available in two fan diameters (500 & 630 mm), different power supplies (230/50-60/1, 400/50-60/3) and four noise levels. Protection class IP 54 according to DIN 40050. AC motors are fitted with integrated thermo contacts to provide reliable protection against thermal overload (terminals in the box). Motors may be wired to one or more common terminal boxes.
For a full overview of all available options and additional technical specifications please refer to the product leaflet.
- Refrigerant: carbon dioxide CO2
- Capacities: 15 - 180 kW
(air temperature = 35°C, CO2 at 90 bar, gas temperature in/out = 120/38°C)
How it works
Alfa Laval finned coil air heat exchangers have been designed to achieve an optimized exchange of thermal energy between air and a refrigerant or fluid. The ‘heart’ of our air heat exchangers is the finned coil, built up from a circuit of interconnected tube serpentines and fins to increase the heat exchanging surface. Thanks to the combination of key design variables (coil materials, coil geometry, casing design, fan type), air units are very versatile heat exchangers with a great variety of applications in many industries. Alfa Laval supplies finned coil air heat exchanger products for a wide variety of applications.
Air-cooled gas coolers
CO2 gas coolers replace traditional air-cooled condensers in refrigerating systems that have been designed for the use of CO2 as a single refrigerant. Such installations are getting more and more widely used. In air-cooled gas coolers the hot, compressed CO2 gas flows through the gas cooler coil and is cooled down by the ambient air that is forced through the coil. Due to the thermodynamic properties of CO2, there is no phase change in the gas cooler. In CO2 refrigerant systems the refrigerant gas is not liquefied until the next system component - the expansion valve (see illustration above). Air-cooled gas coolers operate with considerably higher pressures than air-cooled condensers.