Usystems ColdLogik: Energy efficient cooling for high density environments

Features and benefits | How does it cool? | System overview | What are the risks Energy saving | CAP-EX

The Usystems ColdLogik liquid cooling system is the best available solution in the market today for cooling your critical hardware. As well as providing sensible cooling of up to 45kW per cabinet it also brings massive energy savings to a traditionally energy hungry application.

Features & benefits

• Sensible cooling duty of 45kW per cabinet increasing possible rack mounting densities
• Targeted cooling eliminates heat spots by removing the heat at source
• High system efficiency brings energy savings of up to 90%
• Leak prevention system enables risk free close coupled liquid cooling
• Autonomous control responds to increased demands & saves energy when demand is low
• Modular design enables rapid and scaled deployment
• Built in redundancy enables increased resilience
• Can be retro fitted to any vendors cabinet

How does it cool?

ColdLogik uses rear door heat exchangers on server cabinets that remove heat from the air before it is ejected from the back of the cabinet into the room, ultimately the air leaving the cabinet is the same temperature as the air that went in. This means that cabinets using the ColdLogik System have a thermal foot print of zero within the server room. ColdLogik rear door heat exchangers can be retro fitted to any vendor’s cabinet.

As well as cooling exhaust air the rear door heat exchangers can be used to cool the room; eliminating the need to install CRAC units and a raised floor.

The rear door heat exchangers are fed chilled water either from a dedicated chiller or an existing system

System overview

What are the risks of using water to cool servers?

With ColdLogik’s leak prevention system there is no risk of hardware being affected by water leaks. The system uses negative pressure to drive the water through the pipe work and coils in the heat exchangers. This means that in the unlikely event of joint failure or pipe work becoming damaged the system would simply draw in air which would then be vented through a small tank in the leak prevention unit. Importantly the system will continue to work in the event of a leak.

Each rear door heat exchanger is fitted with a fan failure alarm which is SNMP compatible and fan units are hot swappable. Also available is a rear door heat exchanger fitted with 2 coils enabling a redundant chilled water feed in case of plant failure.

Energy saving and operating costs

Implementing a ColdLogik as your primary cooling system can bring energy savings on up to 90% in comparison to using air conditioning.

The use of rear door heat exchangers to remove heat at source ensures much higher levels of efficiency within the data centre. All air entering the cabinet performs some cooling duty, particularly when the rear doors are used to cool the room. The C4 18kW rear door has no fans and relies on fans in the hardware to push exhaust air through the heat exchanger. Cooling the room in this way uses ZERO power consumption within the data centre. Because CRAC units are not requires their power consumption within the data centre is no longer an issue.

The automated control unit controls the fan speed and water flow to each cabinet providing further energy savings during times of low demand.

The use of free cooling on the primary water circuit also brings massive energy savings. When the outdoor air temperature is lower than 14C-18C the free cooling allows direct heat exchange to take place between the warm water returning from the server room with the ambient outdoor air without running energy hungry compressors. In the UK and northern Europe this equates to around 75% of the time

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CAP-EX

As well as lowering operating costs ColdLogik also represents a cost saving in the context of building a new server room. When the rear door heat exchangers are used to cool the room CRAC units are no longer required. Because CRAC units are no longer required it is likely that a raised floor is also no longer required.

In addition to eliminating the considerable costs of these 2 components the high cooling duty of ColdLogik enables much higher densities of hardware and consequentially fewer cabinets.

What to do next

There are a great many variants and options within the ColdLogik system, many that are affected by existing site conditions, options for automations and control and options for redundancy. Call our office now to discuss these with one of our cooling engineers and arrange a site visit.

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