Mechanical Technology November-December 2016

⎪ Heating, cooling, ventilation and air conditioning ⎪

HFO R-1234ze refrigerant boosts chillers and heat pump efficiency roolefin (HFO) refrigerant, has a GWP of less than 1, below that of CO 2 – according

C arrier’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 CO 2 emissions and improve energy sav- ings significantly. R-1234ze, a hydrofluo-

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

Mechanical Technology — November-December 2016

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