Chillers: Johnson Controls
Johnson Controls has introduced the Quantech Air-Cooled Chillers. The company says the chillers offer up to 50% annual energy cost savings compared with the replaced chillers, have a low lifecycle cost, meet or exceed ASHRAE standards, and help earn LEED credit with a low refrigerant charge. Three models make up the Quantech chiller line. The QTC2 (15-50 tons) provides chilled water for all air conditioning applications using central station air handling or terminal units. The state-of-the-art installation uses tube and fin condensers, brazed plate evaporators, and scroll compressors.
The QTC3 (55-175 tons) offers full load and part load efficiencies that meet or exceed ASHRAE standards and operates at 125ºF and down to zero degrees. The company reports that the scroll compressors are deliver the proven design of two independent circuits for partial redundancy.
The QTC4 (160-210 tons) combines compressor, heat exchanger, condenser fan, and chiller control technologies in order to deliver high efficiencies. The variable speed drive screw compressors reduce sound levels.