Mechanical Technology May 2016

⎪ Heating, cooling, ventilation and air conditioning ⎪

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 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,

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

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

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. q

AHI Carrier’s 19XR AquaEdge chillers offer superior cooling systems for the mining sector.

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. • 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).

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.

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Mechanical Technology — May 2016