Dry
coolers
AlfaBlue BDM, BDD/BDD6
Application
The Alfa Laval dry
coolers can be used in refrigeration, air
conditioning equipment and in Industrial Cooling (cooling of
water or other different fluids), Power, Process and General
Industry.
Heat exchanger
This innovative heat exchanger provides excellent heat transfer
with minimized coolant charge thanks to the new Alfa Laval
fin corrugation and two tube sizes, 1/2” (BDM/BDD series)
and 5/8” (BDD6 series). BDM is a single fan-row model while
the BDD/BDD6 has two fan motor rows.
The standard is to manufacture the
heat exchanger from copper tubes and aluminium fins with
a 2.1mm spacing. The BDD/BDD6 series have double connections
allowing for two independent lines. Each manifold
is provided with draining and venting nozzles. Each heat
exchanger undergoes a dry air pressure and leakage test
at 11 bar.
Fan Motor
On the BDM, four different fan diameters are available: 630,
800, 910, 1000 mm; on the BDD and BDD6, 800, 910, 1000
mm with three-phase motor 400V-50Hz. The motors are with
external rotor, protection class IP54 according to DIN 40050.
AlfaBlue, BDM and BDD/BDD6
Integrated thermal protection by thermo contacts provides
reliable protection against thermal overload.
Five fan motor noise levels, (S) standard, (L) low, (Q) quiet, (R)
residential and the new (T) high performance fan, are available
for these dry
coolers. Dry
coolers BDM/BDD/BDD6 800mm
fans are available in four fan motor noise levels, (S), (L), (Q)
and (R). Dry Coolers BDM/BDD/BDD6 910 are available in five
fan motor noise levels, (T) , (S) , (L) , (Q) and (R). Dry Coolers
BDM/BDD/BDD& 1000 are available in three fan motor noise
levels, (L), (Q) and (R).
New bell mouths optimize the performance of the fan motors
and minimize the noise level. Each fan chamber is separated
by internal baffle plates which enables optimal capacity control
by separate running of the fans.
Frame and Casework
Casework made with galvanized steel sheets painted
(corrosion resistance class C4). New design frame provides
high rigidity also for heavy applications. New system protects
perfectly the heat exchanger tubes during transportation and
operation against vibration and thermal expansion.
Support manufactured in galvanized steel, with optimised
length to permit uniform air suction in the coil.
