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16DJ  Double-Effect Direct-Fired Chiller/Heater 100 to 1500 Nominal Tons (Cooling) 916 to 13,740 MBH (Heating) The refrigeration cycle for a conventional vapor compression chiller and an absorption chiller are similar in that both produce chilled water via the evaporation and condensation of a refrigerant at different pressures within the machine. However, a conventional chiller uses a mechanical means to compress and transport the refrigerant vapor to the condenser, while an absorption chiller depends on a thermo-chemical process involving lithium bromide and water to establish the pressure differential in lieu of mechanical compression. While most vapor compression chillers utilize electricity as its energy source to operate the machine, absorption chillers use heat, typically in the form of steam, hot water or through the direct combustion of natural gas. Double-effect absorption chillers are commonly installed in large capacity comfort cooling applications that are also served by centrifugal or screw chillers such as office buildings, hospitals and universities as well as manufacturing facilities and light industrial process cooling. They¿re also often used in hybrid plant applications, which involve both electric and absorption chillers, and are an ideal choice where electric rates and/or demand charges are high. Double effect chillers use two stages of lithium bromide solution reconcentration versus one stage for a single effect machine, which increases efficiency and reduces energy consumption accordingly. Standard Features: Environmentally Sound Chilled or hot water is produced using water as the refrigerant in place of ozone depleting chlorine-based compounds Alternative Energy Use Uses natural gas as primary energy source Electricity only required for pumps, controls Application Flexibility Hybrid chiller plants allows flexibility and optimization of energy costs Permits base-loading of either absorption or electric chillers depending on energy prices High Reliability / Low Maintenance Cost Few moving parts equates to inherent high reliability as well as lower maintenance costs Low Sound & Vibration No large rotating mass means less noise and vibration allowing installation on upper floors or in sound sensitive areas Certification Rated in accordance with ARI 560-2000 UL-listed

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