Consulting-Specifying Engineer 2016 Product of the Year Finalists
Read about the four finalists in the Chillers category for the Consulting-Specifying Engineer 2016 Product of the Year program.
Chiller, outdoor mechanical room series
AAON LZ Series chillers and outdoor mechanical rooms are engineered to maximize the efficiency of a complete hydronic system. Variable-capacity compressors, high-efficiency condensers, and factory-installed variable-flow pumping packages eliminate the need for an indoor mechanical room. The 2-in. double-wall rigid polyurethane foam insulated cabinet construction with walk-in service compartments protects chiller components and service personnel from the ambient conditions, and reduces radiated sound. The service vestibule can be cooled and heated for comfort during maintenance and for water-freeze protection. Factory-designed primary or primary/secondary water pumping packages are available within the outdoor mechanical room eliminating field costs.
Air-cooled screw chiller
The Pathfinder allows customers to mix and match compressor sizes, evaporator sizes, and other features based on what they want and need for their facility's optimal operation. The latest evolution of Pathfinder chillers offers high energy efficiency levels available by using technologies such as Daikin Variable Volume Ratio Compressors that deliver performance optimized for every condition and at every hour of the day. Variable-volume ratio technology adjusts the compression ratio to meet changes in system lift, which allows Pathfinder compressors to deliver maximized efficiency no matter the conditions. Initially offered in sizes ranging from 165 to 350 tons, Pathfinder is ideal for schools and office buildings.
Daikin Applied, www.daikinapplied.com
Water-cooled centrifugal chiller
The YORK YK-EP "Efficiency Plus" water-cooled centrifugal chiller achieves 5% capacity and efficiency improvements over its previous model. It uses a patent-pending mechanical compression economizer cycle, which uses a mechanical economizer cycle to boost performance over conventional chiller platforms. The YK-EP uses a YORK OptiSpeed variable speed drive, which can accept medium- or high-voltage power, trimming average annual energy consumption by up to 30%. The chiller is able to continuously operate with as low as 50°F low-entering condenser-water temperature, trimming instantaneous energy consumption as much as 50%. Additionally, in facilities with multiple YK-EP chillers, energy savings can be accomplished with series-counter flow arrangement.
Johnson Controls, www.johnsoncontrols.com
Trane Sintesis air-cooled chillers provide energy efficiency and refrigerant choices to help customers meet their project needs. Sintesis chillers are part of the Ingersoll Rand EcoWise portfolio of products designed to lower environmental impact with next-generation, low-GWP (global warming potential) refrigerants and high-efficiency operation. The chiller can operate with either R-134a or Opteon XP10 (R-513a), a nonflammable, low-GWP refrigerant with more than 50% reduction in GWP. The chiller-evaporator and condenser-coil design require up to 40% less refrigerant charge than earlier designs. Sintesis air-cooled chillers are ideal for making ice and can be a key component in ice-enhanced chiller plants.