i-Vu®, Carrier’s open control system, has features that can be
valuable for:
-- EA prerequisite 1: Fundamental commissioning of
energy management system
-- EA credit 3: Enhanced commissioning (2 points)
-- EA credit 5: Measurements and verification (3 points).
Inverter-driven Thunderbolt screw
compressor
The new generation of Carrier inverter-driven screw
compressors benefits for Carrier’s long experience in the
development of twin-rotor screw compressors. The design of
the Thunderbolt compressors is based on the successful 06T
screw compressor, core of the well-known AquaForce series.
■■ A
dedicated oil separator is installed at the discharge
of each compressor to ensure maximum oil return: Oil
separates from refrigerant per gravity and returns to
the low pression side of the compressor without use of
additional pumps.
■■ Advanced control algorithms combine inverter frequency
output with motor input logic to minimise mechanical part
stress, resulting in best compression performance and
high chiller reliability. The compressor is equipped with
bearings with oversized rollers, oil pressure lubricated for
reliable and durable operation, even at maximum load.
Compressor frequency (Hz)
COOLING
Note: Products are not reviewed or certified under LEED®.
LEED® credit requirements cover the performance of
materials in aggregate, not the performance of individual
products or brands. For more information on LEED®, visit
www.usgbc.org.
Novation® Heat Exchangers with
Microchannel Coil Technology
Already utilised in the automobile and aeronautical industries
for many years, the Micro-Channel Heat Exchanger (MCHE)
used in the AquaForce with Greenspeed® technology
is entirely made of aluminum. This one-piece concept
significantly increases its corrosion resistance by eliminating
the galvanic currents that are created when two different
metals (copper and aluminum) come into contact in
traditional heat exchangers.
■■ From the energy efficiency point-of-view the Novation®
heat exchangers are approximately 10% more efficient
than traditional coils and micro-channel coil technology
allows a 30% reduction in the amount of refrigerant used
in the chiller.
■■ The low thickness of the MCHE reduces air pressure
losses by 50% and makes it susceptible to very little
fouling (e.g. by sand). Cleaning of the MCHE heat
exchanger is very fast using a high pressure washer.
■■ To ensure constant level of performance during time and
protect coils from early deterioration or, in worse case,
refrigerant leaks, Carrier offers (as options) dedicated
treatments for installations in corrosive environments.
-- The Novation® heat exchangers with Enviro-Shield
protection (option 262) are recommended for
installations in moderately corrosive environments.
The Enviro-Shield protection utilises corrosion
inhibitors which actively arrest oxidation in case of
mechanical damage.
-- The Novation® heat exchangers with exclusive
Super Enviro-Shield protection (option 263)
are recommended for installations in corrosive
environments. The Super Enviro-Shield protection
consist in an extremely durable and flexible epoxy
coating uniformly applied over all coil surfaces
for complete isolation from the contaminated
environment.
Modulation with slide valve
Modulation with the inverter
0%
204
■■ Screw compressors use positive displacement principle
to compress gases at higher pressure. As a result, in case
of exceptional high temperature condenser side (due for
example to coil fouling or operation in harsh climate) the
compressor does not switch off, but continues operation
at reduced capacity (unloaded mode).
■■ The silencer in the oil separator line (at the compressor
outlet) considerably reduces discharge gas pulsations for
much quieter operation.
25 %
50 %
75 %
100 %
Compressor load (%)
C
A
R
R
I
E
R
2
0
1
6
/
2
0
1
7