Main characteristics DCH
Standard configuration
- Heat exchanger coil
The innovative heat exchanger coil gives excellent heat transfer thanks to new corrugated aluminium fins combined with copper tubing. Tubes ans fins are available in different diameters and thicknesses. DCH radiators are designed with two vertically positioned, independent heat exchanger coils. Thanks to the two separated coils or the use of split coil circuits it is possible to cool different fluids. This configuration, dedicated to the Power Generation, allows to cool two different circuits (i.e. LT and HT engine circuit) in a unique, compact radiator unit.
Copper manifolds are provided with aluminium flanged connections, draining and venting nozzles. DCH can have one or two modules, depending on the required performance. Each heat exchanger undergoes a pressure and leak test with dry air at 10 bar (design pressure 9 bar).
- Fan motors
3-Phase 400V-50Hz squirrel cage induction motors (IEC) are used, on demand 460V-60Hz or other power supply. Protection Class IP55, temperature class F or H, depending to the working conditions. On demand greasers can be included. Each electric fan motor is wired to a terminal box or a safety switch close to the fan cowl.
- Fan blades
DCH can be supplied with different fan diameters (1250 up to1440 mm) fitted with fan blades in aluminium (wind profile), fiber glass or galvanized steel. Fans can have either fixed or adjustable blades. Fans are protected by a epoxy coated or hot deep galvanized metal protection grid.
- Frame and Casing
Casing is made of pre-galvanized sheetsteel. New frame design provides high rigidity, also for heavy applications. Maintenance can be easily done from outside or by entering inside the unit using special inspection doors.
- Support Feet
Heavy duty, hot-dip galvanized steel profiles permit easy transportation of the unit and can be used at the same time to fix the DCH inside the container.
Options
For a full overview of all available options and additional technical specifications please refer to the product leaflet.
How it works
Alfa LU-VE 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 LU-VE supplies finned coil air heat exchanger products for a wide variety of applications.
Air-cooled liquid coolers (radiators/dry coolers)
Air heat exchangers may be used to cool various process liquids. For this application hot process liquid flows through the tubes. This liquid is cooled by the relatively cold ambient air that is forced through the coil.
Air heat exchangers for process liquid cooling are referred to as 'radiators'. Air-cooled liquid coolers for HVAC applications and total energy systems are referred to as 'dry coolers'.