Pentair's analysis of cold and hot aisles without containment shows that an outlet temperature from the computer room air conditioner (CRAC) of 12.6°C is required in order to supply a temperature of 25.6°C to the top zone of the server cabinet.
To further increase efficiency, a data center must be designed for cold-aisle containment in which the hot and cold air are kept separate. By using the Schroff standard containment system together with the airflow kit, losses in airflow volume in the data center can be reduced to almost zero.
- No temperature layering in front of the 19" plane in the aisle containment:
all servers receive cold air at the same temperature.
- Overpressure in the contained aisle: the blow-in temperature of the air conditioner is almost the same as the temperature in front of the servers.
This allows temperature optimization and energy savings of up to 30%, as has been shown by before-and-after measurements in customers' data centers. The comparatively low investment in mechanical covers and containment elements offer a rapid ROI without operating expenses for maintenance.
Automatic sliding doors: Can be combined with electronic locking options and integrated into the Schroff monitoring system
Manual sliding doors
In addition to their functional aspect, the doors also present the 'face' of the aisle containment. Not only do they define the appearance of the system, however, they also have a security function. When equipped with a suitable access control system, cabinet doors are no longer required within the cold aisle, which reduces air resistance. Depending on space requirements and security and functional requirements, Pentair offers a wide selection of containment doors in safety glass for a higher level of security.
The top covers of Schroff containment systems are made of laminated safety glass, which is far superior to Perspex in terms of flammability, susceptibility to scratching and stability. The steel frame provides space for sprinkler nozzles or smoke extraction systems. Pentair can supply electrically opening top covers on request. These covers can be integrated into the Schroff monitoring system or into a facility management system and opened in response to user-defined fault alarms.
Further functions of the universal top cover profile make this containment system even more flexible. With a length of 2400 mm, 3 to 4 cabinets (depending on cabinet width) can be covered.
The universal profile also allows OEM (original equipment manufacturer) equipment to be integrated into one aisle alongside Varistar cabinets. Where existing IT infrastructures are being optimized by the addition of a containment structure, the universal profile also supports the top covers and bridges over different cabinet heights.
Large amounts of energy are used for air movement alone and for cooling it to the required temperature. The cooled air must be delivered to precisely the point at which it is needed - at the air inlets of servers and applications.
- Barrier-free airflow and the avoidance of air resistance enable the fans of the air conditioner to run at lower speed.
- Cold and hot air are kept apart so that the air does not have to be cooled more than is necessary owing to recirculation.
For every degree Celsius by which the air of a data center does not need to be cooled, an energy saving of some 4% can be achieved. It is therefore important to close open height units (U) and the zone beside the 19" plane. However, the operator of the data center also has equipment, primarily switches that require front-to-back cabling. The flexible Schroff standard covers enable Pentair to meet both requirements.
- 70 mm, 145 mm and 220 mm recessed 19" planes
- Network cabinet can be placed in row with server cabinet
- 1 U cut-out for cross running of cables in the cabinet
- Cable can be run from one cabinet to the next
- Cable finger version for cable management
- All covers are supplied with gasketing
If the cabinets are then optimized for front-to-back cooling, a further challenge may arise. Some switches may require side-to-side cooling or - even more difficult - a combined front-to-back and side-to-side cooling, in each case along with front-to-back cabling.
To overcome these difficulties Pentair offers a special side-to-side airflow kit. This kit can also be retrofitted into cabinets already installed in a row.
Special side-to-side airflow kit: right for air inlet. Covers guide the air through the switch; the left-hand side is prepared for the front-to-back cabling, while gasketing can be easily cut to the required length.