Mechanical Technology November-December 2016

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⎪ Heating, cooling, ventilation and air conditioning ⎪
Mechanical Technology — November-December 2016 35
Carrier’s latest generation of
AquaForce® chillers and heat
pumps are now using HFO
R-1234ze, a low global warm-
ing potential (GWP) refrigerant from the
Carrier PUREtec™ family of long-term
refrigerant solutions.
The Carrier brand, which is repre-
sented in South Africa through the joint
venture AHI Carrier, part of UTC Climate,
Controls & Security, a unit of United
Technologies Corp.
“AquaForce in combination with HFO
R-1234ze boasts an energy efficiency
gain of 5% in both heating and cooling
applications when compared to the tra-
ditional R-134a refrigerant,” says Jaco
Smal, commercial sales director, AHI
Carrier. He adds that the new refrigerant
reduces the greenhouse gas footprint by
up to 10%.
HFO R-1234ze is designed to lower
CO2 emissions and improve energy sav-
ings significantly. R-1234ze, a hydrofluo-
HFO R-1234ze refrigerant boosts
chillers and heat pump efficiency
roolefin (HFO) refrigerant, has a GWP of
less than 1, below that of CO2 – according
to the 2010 assessment of the Scientific
Assessment Panel (SAP) of the Montreal
Protocol. It serves as a replacement for
the hydrofluorocarbon (HFC) R-134a
previously used for screw chillers and
heat pumps, a refrigerant favoured for
its zero ozone depletion potential (ODP)
but with a GWP of 1 300.
In terms of heat pumps, the combi-
nation of Carrier technology with HFO
R-1234ze as a refrigerant has redefined
heat pump operating limits to provide hot
water of up to 85 °C. This significantly
extended operating range allows the new
61 XWH-ZE heat pump to meet many
more high-temperature heating applica-
tions, such as district heating, space
heating, sanitary hot water production
or process heating.
Founded by the inventor of modern air
conditioning, Carrier is the world’s leader
in high-technology heating, air-condition-
AquaForce in combination
with HFO R-1234ze boasts an energy efficiency gain
of 5% in both heating and cooling applications when
compared to the traditional R-134a refrigerant.
ing and refrigeration solutions. Carrier
experts provide sustainable solutions,
integrating energy-efficient products,
building controls and energy services for
residential, commercial, retail, transport
and food service customers.
The company is part of UTC Climate,
Controls & Security, a unit of United
Technologies Corp, a leading global
provider to the aerospace and building
systems industries. q