Cabinet door cools servers in situ

CoolAdd provides a novel approach to mid-level server cabinet cooling, which is easily retrofitted to existing cabinet installations.

Knurr, the multinational enclosure and associated technologies company, has introduced CoolAdd a new and innovative 8kW "retro-universal" cabinet door, with an integrated water-cooled system.

CoolAdd provides a totally new approach to mid-level server cabinet cooling, which is easily retrofitted to existing cabinet installations.

CoolAdd fits either as an immediate and easy retro modification replacement door to existing 19in IEC297 installed server cabinets, or to new installations.

It provides an absolute 8kW cooling capability, and exhausts air back to room ambient at a temperature equal to or lower than room ambient temperature.

There is therefore no added thermal load to a computer room's existing CRAC system and the potential provided to improve room ambient temperature conditions.

Existing server positions need not be disturbed.

CoolAdd uses the same basic thermal principles as the proven Knurr CoolTherm 35kW cabinets.

A vertical, sealed air-to-water heat exchanger is located inside the CoolAdd door.

Typical server cabinet performance with an air inlet temperature of 22C and fitted with CoolAdd, will provide a controlled 35C output from the server(s) into the rear mounted CoolAdd door air inlet, while achieving 8kW of controlled heat management.

Under these conditions, air exhausted back into the room would be 22C and require a nominal water feed temperature into the CoolAdd door of 14C, giving a nominal return water temperature of 20C, which is conveniently regulated by an easily accessible thermal valve fitted into CoolAdd's internal door face.

Water supply connection is simply made using approved, standard European 0.75in-diameter connectors and flexible hose.

Each CoolAdd unit is fitted with four fans for n+1 redundancy and magnetic switches stop/start the fans as soon as the CoolAdd door is opened/closed.

Cold air vents from the CoolAdd vertical side panels and provides an effective airflow pattern back into the room, particularly useful when a series of CoolAdd units are bayed side by side.

CoolAdd complies with Standard EN60950 and can replace the rear door of any equivalent size 19in IEC297 cabinet from 45U upwards (2000mm) with model widths from 600mm wide and above.

The maximum overall CoolAdd door depth is only 162mm and typical CoolAdd door weight 41kg.

Retrofitted units retain normal door opening and security.

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