AIRSYS Intelligent Cooling for Server Rooms and Data Centres

Server Room Environments supplies the complete range of intelligent cooling solutions from AIRSYS including in-row, computer room air conditioners (CRACs), air handling units (CRAHs) and chillers, with DX and direct free cooling features.

What is Direct Free Cooling?

For installations where outdoor temperatures are commonly lower than indoor temperature, fresh air can be introduced directly into the server room room or data centre to cool the equipment – this is known as direct free cooling (DFC). A well designed and integrated DFC system can greatly reduce the dependency on other cooling systems and save energy through minimising their run hours. DFC systems can be integrated with OPTIMA-INV and Unicool Edge units, with up flow and down flow configurations available.

Each free cooling unit is equipped with both mechanical cooling system and free cooling system as standard. The fresh air free cooling is designed to be the primary source of cooling. When the outdoor and indoor temperature difference meets the free cooling requirement (2°C default, adjustable), the free cooling system will automatically bring in outside air to the room and stop the mechanical cooling system, therefore reducing power consumption. When the temperature difference between indoor and outdoor is higher than 10°C, the free cooling system can supply 100% of the cooling capacity, saving up to 90% of the energy requirements.

OPTIMA-INV-DFC and Unicool Edge systems include mechanical (DX) cooling and free cooling modes, together with the intelligence to switch between the modes to ensure the most efficient operation. When utilising direct free cooling, the DX system compressor stops, which has a significant impact on the energy consumption. In recent years, energy-efficient data centres have attracted greater attention and many data centres are now able to achieve significant energy savings through both increasing the IT equipment tolerance temperatures and expanding the considered geographical scope to exploit direct free cooling (which is not only limited to regions of extreme cold).

Chillrow CW Series In-Row Cooling Systems

The CHILLROW series from Airsys provide precise, targeted, in-row cooling for Data Centre applications. The units are installed between the server cabinets and discharge cold air directly into the cold aisle. Used stand-alone or as part of a larger CRAC unit installation, areas of localised high-density heat can be effectively targeted by the horizontal supply arrangement of the CHILLROW units, increasing the capacity and efficiency of the overall cooling solution.

The CHILLROW.CW offers heat rejection through a chilled water medium. CW units are viable where a new or existing chilled water system is available. The heat rejection configuration can be selected to best meet the needs of each particular installation.

Chillrow CW Features

• CHILLROW units are available in two industry-standard widths (300mm and 600mm), and are designed to match typical server cabinets in both dimensions and colour.
• Service access is via both the front and rear of the units, allowing routine maintenance to occur in location, without affecting the operation of the surrounding equipment or other operational precision coolers.
• Carel microprocessor controls with RS485 communication are fitted as standard.
• Options: Ethernet card for BACnet/IP connectivity and Modbus TCP/IP connectivity, Humidifier, Electric heater and Two-port or three-port valve options.

Chillrow DXA Series In-Row Cooling Systems

The CHILLROW series from Airsys provide precise, targeted, in-row cooling for Data Centre applications. The units are installed between the server cabinets and discharge cold air directly into the cold aisle. Used stand-alone or as part of a larger CRAC unit installation, areas of localised high-density heat can be effectively targeted by the horizontal supply arrangement of the CHILLROW units, increasing the capacity and efficiency of the overall cooling solution.

The CHILLROW.DXA offers heat rejection through DXA refrigeration. DXA units eliminate the risk of water leakage and can provide some level of redundancy. The heat rejection configuration can be selected to best meet the needs of each particular installation.

Chillrow DXA Features:

• CHILLROW units are available in two industry-standard widths (300mm and 600mm), and are designed to match typical server cabinets in both dimensions and colour.
• Service access is via both the front and rear of the units, allowing routine maintenance to occur in location, without affecting the operation of the surrounding equipment or other operational precision coolers.
• Matched air-cooled remote condensers available.
• Carel microprocessor controls with RS485 communication are fitted as standard.
• Options: Ethernet card for BACnet/IP connectivity and Modbus TCP/IP connectivity, Humidifier and Electric heater.

CYBERMOD CW Series Chilled Water Computer Room Air Conditioning Systems

The CYBERMOD product family from Airsys is designed specifically for use within small, medium and large data centres.
CYBERMOD units combine precise temperature and humidity control with outstanding reliability and energy efficiency throughout 24/7 operation. The CYBERMOD series is a versatile product which combines the advantages of traditional precision air conditioning with modular design technology, simplifying system expansion. New units can be integrated into an existing CYBERMOD arrangement.

The single-coil chilled water system can use existing chilled water sources directly as a cold source, without an outdoor air-cooled condenser unit.

CYBERMOD CW Features:

• CYBERMOD units have a compact structure design and supply high levels of cooling density. While maintaining the same cooling capacity, the units take up a smaller amount of space. The maximum level of cooling density can reach up to 75kW/m².
• The CYBERMOD product family incorporates numerous energy saving technologies; the average EER of module units is above 3.0.
• Supply air arrangements include top discharge (up flow) or bottom discharge (down flow). These arrangements ensure all ICT installation requirements can be met.
• Carel microprocessor controls with RS485 communication are fitted as standard.
• Options: Energy-saving running modes: There are two running modes available. Standard Running Mode where, the temperature and humidity are controlled within narrower ranges; or Energy Saving Mode: where energy savings can be achieved through allowing the temperature and humidity to be controlled within wider ranges, Air plenums and support stands, PCOweb card for BacNet/IP and ModBus TCP/IP connectivity, Energy monitoring, Humidifier and Electric heater.

Optima DXA-DFC Series Air Cooled Computer Room Air Conditioning Systems

The OPTIMA product family from Airsys is designed specifically for use within small, medium and large data centres, as well as for process and cleanroom applications.

OPTIMA INV-DXA.DFC is a DX air-cooled system that is optimised to deliver energy efficient solutions utilising EC fan and inverter compressor technology as standard. This system combines DX-based cooling with Airsys leading edge direct free-cooling technology, allowing you to exploit low ambient conditions and maximise your energy savings.

Optima DXA-DFC Features

• Matched air-cooled remote condensers with options for standard and enhanced ambient conditions up to 45°C.
• ECDC variable speed fans and compressors fitted as standard.
• Carel microprocessor controls with RS485 communication are fitted as standard.
• Effective group control and rotation functions.
• Supply air arrangements include top discharge (up flow) or bottom discharge (down flow). These arrangements ensure all ICT installation requirements can be met.
• Fresh air inlet & outlet boxes complete with filters and control dampers.
• Options: Energy-saving running modes: There are two running modes available. Standard Running Mode where, the temperature and humidity are controlled within narrower ranges; or Energy Saving Mode, where energy savings can be achieved through allowing the temperature and humidity to be controlled within wider ranges, Humidifier, Electric heater, Supply air plenums, Low temperature operation kit for outdoor temperature below -20°C and pCOweb communication card will give MODBUS TCP/IP BacNet/IP.

Optima FC-DXW Series DX Cooling Systems

The OPTIMA product family from Airsys is designed specifically for use within small, medium and large data centres, as well as for process and cleanroom applications.

OPTIMA units combine precise temperature and humidity control with outstanding reliability. OPTIMA INV-DXW is a DX water-cooled system that is optimised to deliver energy efficient solutions utilising EC fan and inverter compressor technology as standard. The water-cooled direct expansion system (DXW) operates similarly to the air-cooled system, however the refrigerant transfers the rejected heat to water via a plate heat exchanger, which is then discharged to the outside air via a dry cooler or cooling tower.

The FC.DXW unit is a single-circuit system combining DXW mechanical cooling with indirect free cooling (FC); the two cooling modes share the same water system. When there is a call for cooling, and the difference between indoor and ambient temperatures is acceptable, the FC unit will run to provide indirect free cooling through rejecting heat via a dry cooler. Only when free cooling capacity is insufficient to meet the cooling demand, will the DXW unit start up mechanical cooling. Reduced run hours of the DXW system through the use of the FC unit, allows the client to exploit low ambient conditions and maximise energy savings.

Optima FC-DXW Features

• Supply air arrangements include top discharge (up flow) or bottom discharge (down flow). These arrangements ensure all ICT installation requirements can be met.
• Effective group control and rotation functions.
• ECDC variable speed fans and compressors fitted as standard.
• Carel microprocessor controls with RS485 communication are fitted as standard.
• Indirect free cooling water coil.
• Options: Matched dry cooler and PUG pump kit available, Energy-saving running modes: There are two running modes available. Standard Running Mode where, the temperature and humidity are controlled within narrower ranges; or Energy Saving Mode: where energy savings can be achieved through allowing the temperature and humidity to be controlled within wider ranges, Humidifier, Electric heater and Supply air plenums

Unicool Series Systems with Free Air Cooling

UNICOOL from Airsys is a packaged system providing fresh air free cooling, combined with variable speed DX cooling technology.

UNICOOL has been designed to withstand harsh telecom base station environments, whilst providing free cooling during low ambient conditions; delivering an energy efficient, low OPEX cooling solution.

Each unit is equipped with both mechanical cooling system and free cooling system as standard. The fresh air free cooling function is designed to be the primary source of cooling. When the outdoor and indoor temperature difference meets the free cooling requirement (2°C default, adjustable), the free cooling system will automatically bring in outside air to the room and stop the mechanical cooling system, therefore reducing power consumption. When the temperature difference between indoor and outdoor is higher than 10°C, the free cooling system can supply 100% of the cooling capacity, saving up to 90% of the energy requirements.

Unicool Features

• Built-in controller + PGD display.
• Integrated with free cooling system, saving up to 90% energy compared with standard mechanical cooling sources.
• Outdoor wall-mounted packaged design – no interior space is required.
• Dual Layer Exterior Protection-Galvanised steel exterior coated with an additional layer of thermoset polymer provides two layers of protection against corrosion. The treatment is sufficient to provide protection for 15 years life cycle for inland installation.
• Easily maintainable from front of unit.
• Carel microprocessor controller with inbuilt RS485 ModBus port.
• Ambient humidity sensor and ambient dust sensor fitted for fresh air override.
• Options: External Controller box for multiple unit control also available (ASMUC), Humidity limitation function – this can be enabled or disabled on site. If it is enabled, when the humidity is higher than the setpoint, free cooling will be turned off in order to stabilise the inside humidity within the base station, Treatment for a sea air environment can be supplied, High-end controller option with inbuilt ethernet port for ModBus TCP/IP connectivity, DC fan option up to 11kW unit, DC to AC conversion box for emergency use and Electric heater.

Unicool-Edge Series Systems for Hot and Cold Aisle Configurations

The UNICOOL-EDGE is a pioneering, horizontal packaged system designed for edge computing applications, allowing seamless integration with cold aisle and hot aisle configuration, managing airflow distribution and enhancing system efficiency.
UNICOOL-EDGE combines variable speed technology with integrated free cooling to deliver a cutting-edge solution.

Designed to be robust, the Unicool-Edge can withstand harsh and remote environments, operating in temperatures ranging from -35°C to 55°C. The Unicool-Edge product range can deliver cooling capacities that range from 12kW with one unit, up to 105kW with three units (stacked), making it applicable for a wide range of customer applications.
UNICOOL-EDGE offers pre-split hot and cold aisle cooling to avoid mixed air and enhance the efficiency of the cooling system.

Unicool-Edge Features

• Outdoor wall-mounted packaged design – no interior space is required.
• Integrated with free cooling system, saving up to 90% energy compared with standard mechanical cooling sources.
• Easily maintainable from front of unit.
• The unit is made of folded galvanised steel exterior coated with an additional layer of thermoset polymer provides two layers of protection against corrosion.
• Carel microprocessor controller with inbuilt RS485 ModBus port.
• Ambient humidity sensor and ambient dust sensor fitted for fresh air override.
• Options: External Controller box for multiple unit control also available (ASMUC), Coastal Environment anti-corrosion available upon request, Dehumidification function with indoor humidity sensor and electric heater, Humidity limitation function – this can be enabled or disabled on site. If it is enabled, when the humidity is higher than the setpoint, free cooling will be turned off in order to stabilise the inside humidity within the base station, High-end controller option with inbuilt ethernet port for ModBus TCP/IP connectivity, DC to AC conversion box for emergency use, and Electric heater.

For more information on the AIRSYS range of cooling solutions for critical environments including servers rooms, data centres, telecoms and process control applications, please contact our Projects Team.