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Heating, cooling, ventilation and air conditioning
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Mechanical Technology — May 2016
M
ines require sufficient cool-
ing and ventilation to ensure
worker comfort and safety,
and to keep processes run-
ning smoothly. AHI Carrier specialises in
mining water chillers with capacities of
between 5.0 MW and 10 MW.
AHI Carrier commercial sales direc-
tor Jaco Smal (above) indicates that
Features summary for
19XR AquaEdge chillers
Ratings
• 19XR and 19XRV (VFD): 703 to
5 627 kW.
• 19XR two-stage: 2 814 to 10 551 kW.
Performance features
• IPLV (integrated part load value): 0.31
(19XRV).
• Chlorine-free HFC-134a refrigerant.
• Semi-hermetic compressor motor.
• Low energy consumption during part load
and full load operation.
• Aerodynamically contoured impeller.
• Multilingual display.
• Compatible with Carrier Comfort Net-
work
®
(CCN) communication link.
• Two stage economised compressor (19XR
two-stage units).
Reliability features
• ASME constructed heat exchangers.
• Single-stage or two-stage positive pres-
sure compressor.
• Low voltage control circuits.
• Lowest industry refrigerant leakage rate
at less than 0.1%.
• Semi-hermetically sealed compressor,
motor, and transmission.
• Automated controls may be tested before
start-up.
• Refrigerant-cooled, unit-mounted variable
frequency drive (19XRV).
AHI Carrier’s 19XR AquaEdge chillers offer superior cooling
systems for the mining sector.
Heating and air-conditioning solutions specialist, AHI
Carrier, aims to position itself as a leading supplier in
the mining sector. The company, which invests heavily
in key technologies and innovative solutions, points
to efficiency and quality as the main reasons for the
success of its products.
Mining sector
cooling systems
Carrier mining chillers are designed with
robustness and reliability in mind, also
achieving premium energy efficiency with
variable speed control on the compres-
sors. “The maintenance costs on the
Carrier chillers are dramatically reduced
in comparison with open-drive compres-
sor chillers used by others.”
AHI Carrier’s 19XR AquaEdge chillers
feature a semi-hermetic motor design,
which is highly reliable and reduces the
need for additional mechanical room
cooling. The chillers also feature two-
stage compression technology, which is
an advantage for large tonnage and high
lift applications.
“The two-stage design provides
improved cycle efficiency by leveraging
an inter-stage flash economiser. This
reduces compressor power while simul-
taneously increasing refrigeration effect
and capacity, resulting in high energy
efficiency under full load and part load
conditions,” adds Smal.
The 19XR AquaEdge variable speed
centrifugal chillers are easy-to-install,
have copper nickel tubes, clad tube
sheets and marine water boxes on both
the evaporator and condenser. Thanks
to the adjustable touch screen display,
comfortable viewing from four mounting
locations is possible.
“For air conditioning and heating
products in South Africa,
there’s no name more
trusted than Carrier. AHI
Carrier is a company
that believes in problem
solving on a global level
through innovation that
drives new industries.
We supply a variety of air
conditioning and heating
solutions for the mining,
commercial and industrial
sector and have been a
provider of sustainable solu-
tions for more than 100 years
in heating, air conditioning, building
automation and energy services for the
lifecycles of buildings,” adds Smal.
As well as its extensive chiller range,
the company offers: air handling units,
which can include electric heating coils,
valve packages or hot water coils; con-
trols ranging from thermostats to zoning
systems; and Carrier operates its own
servicing entity with access to the lat-
est engineering and the most advanced
technical servicing tools.
“Even though the mining sector is
still at a low, AHI Carrier is determined
to penetrate the sector and acquire
significant market share. I have full con-
fidence in the quality and reliability of
our products. Our water chillers improve
productivity and save on energy costs.
We are proud to provide superior qual-
ity water chillers that meet a variety of
cooling applications,” he concludes.
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