Chiller systems are commonly found in food processes, plastic injection moulding and airports and hospitals i.e. large buildings requiring a significant amount of heat to be removed to optimise productivity and safeguard against overheating.

Chiller systems are typically used for high heat and large commercial environments because they provide a number of benefits;

• N+1 redundancy is much more cost effective with a chiller system. In order to provide full system redundancy, with alternative cooling systems, an additional cooling unit is required for each space. With chiller systems, only one chiller unit is needed for the entire system in order to provide full system redundancy. This reduction in equipment results in system redundancy being much more cost effective in terms of CapEx and running / maintenance costs.

• Chiller systems do not suffer from frozen evaporators or cooling coils which is common in comfort cooling systems when used in high humidity environments. With chiller systems, the cooling coil temperature never drops below 45°F, which is the set point of the chiller system. However, with comfort cooling systems, the refrigerant in the system is naturally below freezing and warms up as it passes through the cooling coils. Ice can form at the point where the refrigerant begins to boil off. In humid environments, the evaporator and coils are highly likely to freeze due to the added moisture in the air.

• Free cooling in the winter. With chiller systems, it is possible to add dry coolers to the system in order to cool water during the winter without running the compressors. This chilled water can then be used to cool the interior of the building without ever coming into direct contact with the air in the room. Alternatively, with traditional cooling systems, in order to achieve free cooling in the winter, outside air must be brought into the grow room. This can cause a number of problems, including the introduction of pathogens, reduction in CO2 levels and humidity spikes.

Know your options when selecting HVAC for a large space manufacturing environment and Data Centres, and consider these factors before making your final selection.

With monthly cooling costs amounting to as much as 46% of electricity usage, the system you choose will have a large impact on your company’s bottom line.

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