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Airedale's new high efficiency screw chiller range for optimum control and flexibility


Breaking new ground in energy efficiency, Airedale has launched OptiChill, a new range of large capacity, high efficiency, air-cooled screw chillers. OptiChill has a small footprint and offers a raft of options providing a high degree of flexibility to meet a diversity of applications.

Offering 500kW to 1100kW nominal cooling capacities across dual independent refrigeration circuits, OptiChill has been optimised for use with R134a refrigerant. A choice of 52 model permutations is available through the range. Thirteen model sizes each offer a High Efficiency and a High Efficiency Plus range and two low sound level variants in each range.

The very best components are selected for optimum operating efficiency and combine to give EER values of 3.0 at Eurovent conditions and ESEER values above 3.5.

Each of the two high efficiency, top-of-the-range compressors modulate to accurately meet cooling load and are complemented by economisers, electronic expansion valves and super-efficient heat exchangers to enhance system performance and efficiency.

The shell and tube evaporator is the best ever presented by Airedale and offers extremely high evaporating temperatures for a given supply water temperature. Condenser coils have larger surface areas to provide greater heat exchange. Cleverly-designed, sickle-bladed axial fans present a new blade design which gives increased performance at reduced input power and lower noise levels. Optional electronically-commutated fans reduce condenser fan input power and further increase running efficiencies at full and part load.

An inverter-controlled pump offers variable fluid flow, saving energy on pump input power and providing exact flow requirement. The pump can be controlled by an optional electronic metering system via the onboard AireTronix controller to maintain design flow over time.

An optional Chiller Sequence Manager recently launched by Airedale integrates up to eight chillers into a single operating system to provide best-fit, energy-efficient solutions, ensuring equal usage of compressors and allowing remote set point adjustment and alarm management. Energy Manager for power consumption analysis is also an option.

OptiChill meets all the criteria for inclusion on the Energy Technology List, enabling end-users to claim 100% first-year capital allowance. Applications include close control, process and comfort cooling particularly involving large, diverse cooling loads.

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