Abstract: Data center mechanical infrastructure is incrementally deployed and commissioned to support incremental changes in computing capacity in a data center while mitigating interaction between infrastructure being commissioned and installed computer systems. Incremental mechanical infrastructure commissioning can be concurrent with incremental electrical infrastructure commissioning and includes operating mechanical infrastructure to remove heat generated as a result of operating electrical infrastructure to support simulated electrical loads as part of electrical infrastructure commissioning. Incremental mechanical infrastructure deployment can be based on the power support capacity provided by incrementally deployed electrical infrastructure.

Abstract: A passive cooling system routes air from an enclosure to an ambient environment, via a chimney effect, through one or more indirect pathways and re-directs environmental elements received from the ambient environment. One or more vanes are arranged within an interior space, such that the vanes collectively form one or more indirect pathways to the ambient environment. The vanes preclude environmental elements, including precipitation and particulate matter, from passing through the interior space and into the enclosure. Environmental elements are re-directed by one or more of the vanes, at least in part, to an exterior of the passive exhaust system. Dampers may be adjusted to control airflow through the passive cooling system and restrict environmental elements from entering the passive cooling system. Liquids received from the ambient environment may be re-directed into a reclamation system for use in a cooling system.

Abstract: Data center mechanical infrastructure is incrementally deployed and commissioned to support incremental changes in computing capacity in a data center while mitigating interaction between infrastructure being commissioned and installed computer systems. Incremental mechanical infrastructure commissioning can be concurrent with incremental electrical infrastructure commissioning and includes operating mechanical infrastructure to remove heat generated as a result of operating electrical infrastructure to support simulated electrical loads as part of electrical infrastructure commissioning. Incremental mechanical infrastructure deployment can be based on the power support capacity provided by incrementally deployed electrical infrastructure.

Abstract: Cooling units are configured to be installed in a datacenter, such as in a row configured to receive server racks. The cooling units include chilling coils configured to cool air passing across the chilling coil. The cooling units when installed supply cooled air and include one or more cooling unit components located beneath or installed in a raised floor of the datacenter.

Abstract: Data center mechanical infrastructure is incrementally deployed and commissioned to support incremental changes in computing capacity in a data center while mitigating interaction between infrastructure being commissioned and installed computer systems. Incremental mechanical infrastructure commissioning can be concurrent with incremental electrical infrastructure commissioning and includes operating mechanical infrastructure to remove heat generated as a result of operating electrical infrastructure to support simulated electrical loads as part of electrical infrastructure commissioning. Incremental mechanical infrastructure deployment can be based on the power support capacity provided by incrementally deployed electrical infrastructure.

Abstract: A trim cooling assembly provides a sensible trim cooling capability for intake air provided to a downstream computing pod that includes an air cooling system that provides cooling air to computer systems in the pod. The air cooling system can evaporatively chill received intake air to provide the cooling air. The trim cooling assembly is mounted externally to the computing pod and upstream of the air cooling system and includes one or more trim cooling units that can be individually controlled to provide adjustable sensible chilling of the intake air. The trim cooling units and an evaporative cooling unit in the air cooling system can be controlled to provide various levels of sensible and evaporative cooling to maintain conditions of air downstream of the evaporative cooling unit within certain ranges. Trim cooling units can be progressively activated and de-activated in stages to provide progressively adjusted sensible cooling.

Abstract: A preheat damper preheats ambient air being directed to an air handling unit of a data center to mitigate ice accumulation caused by the ambient air. The ambient air can be preheated upstream of a mist eliminator, which removes moisture from the ambient air upstream of the air handling unit, to mitigate ice accumulation in the mist eliminator. The preheat damper directs exhaust air from an exhaust air plenum. The preheat damper can be adjusted based on the ambient temperature, and can be upstream of a return damper which directs exhaust air from the exhaust air plenum based on characteristics of the cooling air supplied to cool data center equipment. The return damper can be adjusted in counter-opposition with one or more intake dampers to maintain cooling air characteristics, and concurrently with the preheat damper to direct ambient air to the air handling unit through the exhaust air plenum.

Abstract: An inverted exhaust plenum module exhausts air from an enclosure into an ambient environment while mitigating airflow restrictions caused by ambient wind conditions, particularly headwinds impinging on exhaust vents. The plenum module includes wall elements that extend downwards from separate edges of two separate roof elements of the enclosure, forming a plenum between the wall elements that is open at the top. Exhaust vents in the wall elements exhaust air from the enclosure into the plenum to circulate into the ambient environment via the top of the plenum. By exhausting air into a plenum that extends beneath roof elements, the vents are at least partially obscured from ambient winds that might otherwise impinge on the vents. A wing element can be installed to induce exhaust airflow via lowering air pressure at the top of the plenum. The plenum module can be a separate module that is coupled to a structure.

Abstract: A data center includes a computer room with one or more regions, where each region includes air handling components which can be independently controlled, relative to components in other regions. A purge control system in each region can bypass a control system which adjusts the components based on environmental sensor data to command the components to purge the region. Upon the components in a region entering a purge mode, a purge notification signal can be sent to a master control system, which can instruct other control systems in other non-purging regions to limit controller output ranges to last-known values prior to the purge, so that the components in other regions are operated at last-known states while one or more regions are purging. When regions have ceased purging, the regional control systems can re-establish the control loop output ranges. Such re-establishment can include incrementally expanding the output range over time.

Abstract: Cooling units are configured to be installed in a datacenter, such as in a row configured to receive server racks. The cooling units include chilling coils configured to cool air passing across the chilling coil. The cooling units when installed supply cooled air. Units can be coupled together to expand cooling capacity, such as by forming a shared volume between adjacent units. Cooling provided through one or more coupled units can be controlled by another of the coupled units.

Abstract: A data center row infrastructure module enables rapid deployment of a computing room enclosure for computer systems that provides intake air circulation to, and exhaust air removal from, the computer systems in the enclosure. The data center row infrastructure module includes free-standing exhaust plenum structures encompassing opposite sides of the enclosure and a plenum module spanning a top end of the enclosure between the free-standing exhaust plenum structures. Each free-standing exhaust plenum structure includes an internal exhaust air plenum that directs exhaust air received from the enclosure through an exhaust air outlet on a top end of the free-standing exhaust plenum structure. The plenum module establishes a bottom end of a cooling air plenum above and separate from the enclosure and between the free-standing exhaust plenum structures. Some plenum modules can direct cooling air directly to the enclosure as intake air.

Abstract: A fan assembly comprises a fan and a movable fan support. The fan has a motor and a fan blade drivable by the motor to move air in an airflow direction through an opening. The movable fan support is configured to movably support at least the fan. The fan support is mountable adjacent the opening on a first side and comprises extension members extendable from an operating position on the first side of the opening to an access position on a second side of the opening opposite the first side. In the access position, the extension members extend through the opening from the first side to the second side to support the motor and fan blade on the second of the opening for access.

Abstract: An updated operating speed for a fan of an air handler may be determined. The updated operating speed may depend on a target output volume for the air handler and an intermediate resistance value for a filter of the air handler. The intermediate resistance value may be determined by instructing the fan to operate at a first operating speed for a fixed period of time. During the fixed period of time, a pressure sensing system may sense an observed differential pressure measured across the filter. The observed differential pressure may correspond to the intermediate resistance value. The intermediate resistance value may be used to identify, from a set of filter loading values which may be retained in a filter loading data structure, the updated operating speed for the fan such that the air handler is capable of achieving the target output volume.

Abstract: In-row cooling units are configured to be installed in a row configured to receive server racks in a datacenter. The cooling units include chilling coils configured to cool air passing across the chilling coil. The cooling units when installed supply cooled air through a floor of the datacenter, such as after receiving and cooling air from or through a ceiling plenum.

Abstract: A data center row infrastructure module enables rapid deployment of a computing room enclosure for computer systems that provides intake air circulation to, and exhaust air removal from, the computer systems in the enclosure. The data center row infrastructure module includes free-standing exhaust plenum structures encompassing opposite sides of the enclosure and a plenum module spanning a top end of the enclosure between the free-standing exhaust plenum structures. Each free-standing exhaust plenum structure includes an internal exhaust air plenum that directs exhaust air received from the enclosure through an exhaust air outlet on a top end of the free-standing exhaust plenum structure. The plenum module establishes a bottom end of a cooling air plenum above and separate from the enclosure and between the free-standing exhaust plenum structures. Some plenum modules can direct cooling air directly to the enclosure as intake air.

Abstract: Air conditioning systems and techniques are described that include passing a fluid through a slab. The fluid is cooled in the slab and the cooled fluid is circulated to a coil. The coil is arranged in an airflow such that ambient air passes over the coil, thereby reducing the relative humidity of the ambient air. A control unit may also be provided to selectively operate a pump to control the flow of the fluid through the slab.

Abstract: An inverted exhaust plenum module exhausts air from an enclosure into an ambient environment while mitigating airflow restrictions caused by ambient wind conditions, particularly headwinds impinging on exhaust vents. The plenum module includes wall elements that extend downwards from separate edges of two separate roof elements of the enclosure, forming a plenum between the wall elements that is open at the top. Exhaust vents in the wall elements exhaust air from the enclosure into the plenum to circulate into the ambient environment via the top of the plenum. By exhausting air into a plenum that extends beneath roof elements, the vents are at least partially obscured from ambient winds that might otherwise impinge on the vents. A wing element can be installed to induce exhaust airflow via lowering air pressure at the top of the plenum. The plenum module can be a separate module that is coupled to a structure.

Abstract: A data center row infrastructure module enables rapid deployment of a computing room enclosure for computer systems that provides intake air circulation to, and exhaust air removal from, the computer systems in the enclosure. The data center row infrastructure module includes free-standing exhaust plenum structures encompassing opposite sides of the enclosure and a plenum module spanning a top end of the enclosure between the free-standing exhaust plenum structures. Each free-standing exhaust plenum structure includes an internal exhaust air plenum that directs exhaust air received from the enclosure through an exhaust air outlet on a top end of the free-standing exhaust plenum structure. The plenum module establishes a bottom end of a cooling air plenum above and separate from the enclosure and between the free-standing exhaust plenum structures. Some plenum modules can direct cooling air directly to the enclosure as intake air.

Abstract: A passive cooling system routes air from an enclosure to an ambient environment, via a chimney effect, through one or more indirect pathways and re-directs environmental elements received from the ambient environment. One or more vanes are arranged within an interior space, such that the vanes collectively form one or more indirect pathways to the ambient environment. The vanes preclude environmental elements, including precipitation and particulate matter, from passing through the interior space and into the enclosure. Environmental elements are re-directed by one or more of the vanes, at least in part, to an exterior of the passive exhaust system. Dampers may be adjusted to control airflow through the passive cooling system and restrict environmental elements from entering the passive cooling system. Liquids received from the ambient environment may be re-directed into a reclamation system for use in a cooling system.