The designation given to power that is delivered in the form of a sinusoidal wave form. AC won out over DC as the preferred method of delivering and using power in the industrial age due to the ease of voltage transformation using static devices (transformers).
A supplementary entrance facility into a building using a different routing to provide diversity of service and for assurance of service continuity.
The open space between rows of racks. Open airflow designs dictates racks should be arranged with consistent orientation of front and back to create ‘cold’ and ‘hot’a isles; but aisle containment designs and alternative cooling methods may dictate alternate configurations.
A device consisting of fans, ducting and a control which utilizes outside air directly to cool the data center when environmental conditions allow. Air is typically filtered, brought into existing distribution system and then exhausted back to the atmosphere. Economizers can save data center operators substantial operating costs. According to GreenerComputing.org, economization has the potential to reduce the annual cost of a data center’s energy consumption by more than 60 percent. Use of cooler external environmental temperatures to preserve hardware is an important component in sustainable green computing practices in general. Unfortunately, economizers are only useful for data centers located in cooler climates.
The unintended mixing of cold and hot air.
The amount of heat removed per standard cubic foot of airflow per minute.
The operator of any facility that is used to convey telecommunications signals to and from a customer premises.
A telecommunications circuit provided by a service provider at the demarcation point.
Heating, Ventilation and Air Conditioning system, the set of components used to condition interior air including heating and cooling equipment as well as ducting and related airflow devices.
A system consisting of completely removable and interchangeable floor panels that are supported on adjustable pedestals or stringers (or both) to allow access to the area beneath.