Johnson Controls has launched the York YVMA water-cooled screw chiller, which is claimed to reduce energy costs by 25 per cent.
Mutaz Yaghi, global marketing manager for Johnson controls, said: “HVAC systems are typically the largest consumers of electricity in commercial buildings.”
“Johnson Controls has taken water-cooled screw chiller efficiencies to a whole new level, reducing electric consumption, while maintaining the core attributes of flexibility and affordability that users expect from screw compressors.”
The company claims that the variable-speed drive saves energy during the 97 per cent of operating hours spent at off-design conditions, when building loads and/or tower-water temperatures are lower.
As a result, the YVWA delivers an Integrated Part Load Value (IPLV) as much as 30 percent better than traditional screw chillers, making it best-in-class.
The YVWA increases sustainability by using HFC-134a refrigerant, which has zero ozone-depletion potential and no phase-out date.
Its innovative design reduces the number of potential leak points by 35 per cent. In addition, Johnson Controls proprietary falling-film evaporator reduces the chiller’s refrigerant charge by as much as 30 percent compared to conventional designs.
The YVWA screw chiller can be used in both thermal-storage and heat-pump applications, while delivering the highest efficiencies available.
It can also utilise a wide range of heat-rejection methods, including an open cooling tower, dry cooler, adiabatic cooler, heat recovery, or heat pump.