An improved structure of a power input end and a power output end of a power supply device is provided. The power supply includes a casing and a main body. A rear side of the casing is provided with a back plate having first heat dissipation holes. One side of an inner wall of the casing is provided with a power input end and a protection cover. A rear side of the protection cover is provided with an upright plate having a threaded hole and second heat dissipation holes parallel to the first heat dissipation holes. The interior of the casing is provided with two power output ends each in the form of a plate perpendicular to the back plate. The present invention lowers the sheltered area of the back plate to form a better heat dissipation structure. The protection cover can be disassembled easily.

A data centre (100) includes at least one rack room (in for example module 140) having a floor and a plurality of rack storage areas on the floor, each rack storage area being arranged to accommodate a plurality of racks (143) in which a plurality of rack-mountable electronic components may be housed, one or more controllable air circulation systems (in for example module 122), one or more cold aisles (144) in the rack room, each cold aisle being adjacent to a rack storage area, and one or more hot aisles (145) in the rack room, each hot aisle being adjacent to a rack storage area. There may be a large air duct, in the form of a personnel corridor (123), for transporting, under the control of the one or more air circulation systems, cooling air, above the floor, to the one or more cold aisles. The air supply corridor/duct (123) may have a height greater than 1.5 m above the floor and a cross-sectional area of at least 2 m.sup.2 and a maximum dimension in the plane of the cross-section of less than 3 m.

A control system for providing thermal management of electronic equipment housed in a cabinet enclosure. The system can include a plurality of sensors in proximity to the cabinet enclosure for monitoring a temperature, a pressure and a humidity associated with the electronic equipment; and a controller in communication with the sensors for receiving data from the sensors, where the controller adjusts the temperature, the pressure and the humidity associated with the electronic equipment.

A two chamber heat transfer unit configured such that hazardous air can circulate through one of the chambers and potential ignition source components are contained in another chamber through which the gas to be heated or cooled will circulate.

A two chamber heat transfer unit configured such that hazardous air can circulate through one of the chambers of the heat transfer unit and any potential ignition source components are contained in another pressurized chamber of the heat transfer unit.

A bracket apparatus for ambient temperature regulation of network interface cards. The bracket apparatus includes: a static outer bracket, including: a plurality of outer bracket vents; and a moveable inner bracket capable of sliding vertically against the static outer bracket, and including: a plurality of inner bracket vents, which: permits a passage of cold-side airflow when aligned with the plurality of outer bracket vents, and impedes the passage of the cold-side airflow when misaligned with the plurality of outer bracket vents.