AlfaBlue BXM/BXD0 pages

AlfaBlue BXM/BXD
Air-cooled gas coolers
General information & application
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.
The AlfaBlue series is a wide range of heavy-duty gas coolers
for air conditioning and refrigeration applications. AlfaBlue gas
coolers are available for both horizontal and ver­ical air direc­
t
tion, either in single (M) or dual (D) coil execution.
Alfa Laval offers a wide range of CO2 gas coolers with
capacities ranging from 15 up to 750 kW.
Alfa Laval CO2 gas coolers
AlfaBlue
AlfaBlue Junior
Alfa-V
Alfa-V Single Row

Capacity range*
20-450 kW
15-180 kW
50-750 kW
42-370 kW

* ir temperature = 35°C, CO2 at 90 bar, gas temperature in/out = 120/38°C
a

Coil
An innovative coil design based on small diameter copper
tubes and corrugated aluminium turbo fins provides excellent heat transfer at minimal refrigerant charge. Standard fin
s
­ pacing is 2.1 mm.
Circuiting design is fully optimized to the thermodynamic
properties of CO2. Stainless steel header tubes for on-site
welding connections.
Available in different fin thicknesses and fin spacings. ­
Separate connections in the D series provide the opportunity
for independent operation of both gas cooler coils.
Casing
Frame construction provides high rigidity for protection
against vibration and thermal expansion. Casing and framework of corrosion resistant pre-galvanized sheet steel (corrosion ­esistance class C4), epoxy coated white RAL 9002 on
r
both sides. Separated fan sections.
Fan motors
Available in four fan diameters (630, 800, 910 & 1000 mm)
and five noise levels, power supply 400/50/3. Motors with
external rotor, protection class IP 54 according to DIN 40050.
Integrated thermo contacts provide reliable protection against
thermal overload. EC fan motors available.
Options
•t Multi-circuiting
•t Coil corrosion protection
--Coil coating
--Fins seawater resistent aluminium alloy 57S/5052

AlfaBlue gas coolers

•t Spray water device (version D only)
•t Vibration dampers
•t Special fan motors
--EC fan motors
--480/3/60 (IP54)
--Protection class IP55
--High-temperature motors
•t Electrical options
--Isolating switch
--Motors wired to a common terminal box
--Switchboard (IP55)
--EMC approved components
--Fan step control
--Fan speed control
--Frequency control
Certifications
The Alfa Laval quality system is in accordance with ISO 9001.
All products are manufactured according to CE and PED
rules.
Design pressure
Design pressure 120 bar. Each heat exchanger is leak tested
with dry air and finally supplied with a nitrogen pre-charge.
Selection
For gas cooler selection and support please contact your
local Alfa Laval representative.