Abstract: A rack system (100) comprises a plurality of racks (105) arranged to form at least one aisle (120) between them. The aisle (120) is sealed such that essentially all of a cooling medium supplied to the aisle (120) passes through the racks (105). A bleeding opening is provided for enabling a bleeding of the cooling medium out of the aisle (120) and an entering of an ambient medium into the aisle (120). A sensor (such as a temperature sensor) is arranged to determine a medium flow direction through the bleeding opening. In one embodiment, a signal generated by the sensor is used to control at least one parameter of the cooling medium supplied to the aisle (120).

Abstract: In order to improve the energy balance for air cooling in equipment cabinets, in particular cabinet arrangements in computer centres and server rooms, regulation of the fans for the cooling air circuit is proposed, by means of which precisely the required amount of cooling air can be made available in the induction area to the electronic module units, in particular servers, in the equipment cabinets. According to the invention, at least one leakage air flow is formed between a cold air channel and an exhaust air channel, and is provided with a temperature sensor. The temperature measurement indirectly measures the flow direction and acts as a reference variable for regulating the rotation speed of the fans which, in particular, are arranged in the exhaust air channel. Regulation of the fan rotation speed matches the volume flow of the cooling air circuit to the volume flow actually required by the electronic module units, and therefore reduces the electricity consumption.

Abstract: A rack system (100) comprises a plurality of racks (105) arranged to form at least one aisle (120) between them. The aisle (120) is sealed such that essentially all of a cooling medium supplied to the aisle (120) passes through the racks (105). A sensor arrangement (195) is provided to compare the medium pressure inside and outside the aisle (120). In one embodiment, a signal generated by the sensor arrangement (195) is used to control at least one parameter of the cooling medium supplied to the aisle (120). As an example, the flow rate of the cooling medium may be controlled.

Abstract: A rack system (100) comprises a plurality of racks (105) arranged to form at least one aisle (120) between them. The aisle (120) is sealed such that essentially all of a cooling medium supplied to the aisle (120) passes through the racks (105). A bleeding opening is provided for enabling a bleeding of the cooling medium out of the aisle (120) and an entering of an ambient medium into the aisle (120). A sensor (such as a temperature sensor) is arranged to determine a medium flow direction through the bleeding opening. In one embodiment, a signal generated by the sensor is used to control at least one parameter of the cooling medium supplied to the aisle (120).

Abstract: A suspended trimming device in which two lengths of cable are suspended from a yoke and have loops at their ends, in which the yoke is suspended to pivot at least about a horizontal axis. According to the invention, the yoke is suspended on an elastic cable secured to the yoke at its longitudinal center so that the yoke is vertically movable and can also rotate about a vertical axis.