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Following analysis of existing market trends and requirements, Nucore Group have recently completed an innovative cooling system prioritising low load starting current, designed for continuous and ad-hoc use on limited capacity power sources.

This direct expansion (DX) cooling system can typically be run from emergency back-up battery power, or in environments where renewable energy generation is the primary source of power. The Nucore Group designed system can be universally applied where climate control and operating temperatures are vital for ongoing operations in environments where power consumption is critical. The system is designed for harsh external environments and suitable for use in marine atmospheres with an external operating temperature of up to +50°C.

Typically, available in standard 9kW cooling duty, the internal evaporator can be supplied in wall mount, under ceiling or ceiling cassette configuration to suit a variety of layouts. Depending on specification, the wall and under ceiling units can also be supplied in a high quality Stainless Steel casing for additional protection.

The external unit can be designed for use in both hazardous (Zone 1/Zone 2) and non-hazardous areas and is encased in 316L stainless steel, providing a design life expectancy of up to 25 years.

The system features a variety of innovations and features, including a staged, soft start sequencing that enables the system to start on just 25% of the normal Locked Rotor Amps (LRA) of standard DX systems of this type. The multiple motors within the system are operated through a sequenced system which prevents multiple motors from simultaneous starting and creating a peak load scenario.

It has been designed for ease of use and maintenance and can be supplied in standard catalogue enclosure sizes, facilitating integration into common floor plans, equipment room layouts and in IP rated weatherproof housings if required.  Maintenance points are convenient, and components are readily available to ensure maintenance downtime can be minimised.


Feedback from our happy customer on the issue and how Nucore helped solve it:

“It was identified on an offshore facility in a particularly warm climate that during shutdown of platform power generation following gas detection the associated room central cooling equipment would stop, which would cause the required minimal safety controls electronic hardware housed in rooms to operate on UPS battery power.

 The heat from the safety equipment in the various rooms with no cooling would increase the room temperature to above the maximum rating of the safety equipment design in a short time and likely cause malfunction before the various safety, mustering and evacuations could take place.


Therefore, local battery powered cooling units were developed to allow the safety electronic equipment to operate for at least one hour.

 This required cooling units to be developed that could be powered from a UPS system and the challenge was to limit the maximum rating of the UPS inverter which would be impacted by the cooling unit compressor starting current.”

Nucore successfully achieved this by utilising multiple small compressors sequenced controlled and each with soft starters giving significant reduction in UPS inverter size whilst working with our client to help facilitate the review and prioritisation of their UPS backed critical systems.


For further information, please contact Nucore Group