Abstract: According to an example, a cooling system includes a cooling fluid reservoir, a cooling apparatus in fluid communication with the cooling fluid reservoir, a chamber having a side in thermal contact with a portion of the heat generating component, in which cooling fluid delivered by the cooling apparatus is to be heated through receipt of heat from the heat generating component, a cooling plate positioned at a distance and separated from the chamber, and a cooling fluid tube connecting the chamber and the cooling plate, in which the heated cooling fluid is to flow through the cooling fluid tube to the cooling plate. The cooling plate is also to be in thermal contact with a heat exchanger that that is to remove heat from the cooling fluid.

Abstract: A fan impeller with multiple blades shaped and disposed to provide high air-power efficiency. The fan impeller includes a hub, a first plurality of primary blades and a second plurality of secondary blades. The leading edge of the first secondary blade is disposed proximately to the trailing edge of the first primary blade. A leading edge portion of the first secondary blade is also disposed in an inter-blade space between the first primary blade and a second primary blade. A trailing edge portion of the first secondary blade is disposed outside of the inter-blade space and towards a bottom of the hub. A cooling fan including the fan impeller, and an electrical apparatus including the cooling fan that includes the fan impeller are also provided.

Abstract: A vertical axis wind turbine having multiple blades in which the root of each blade is oriented at an angle to a radial direction from a drive shaft and at least a portion each blade is swept back. The blades preferably have a symmetric partial aerofoil shape of generally V-shaped cross section of generally constant cross section.

Abstract: One embodiment has plural servers stacked in an enclosure. The servers have a front surface and at least two hard disk drives that are each hot-swappable and replaceable through an opening in the front surface.

Abstract: A serial communications bus is utilized to send key action data between parallel UPS units. The communications bus is used to transmit data at the zero crossing of the critical bus voltage. Each UPS unit then takes action based upon the event data received at the next zero crossing of the critical bus voltage.

Abstract: In accordance with certain embodiments, a computer system having an electronic component, a heat sink having a contact surface disposed against the electronic component, and at least one blower embedded within fins of the heat sink.

Abstract: A system for maintaining heat sink temperature uniformity in a system with pairs of substantially similar components mounted on a surface in close proximity and substantially aligned with an air flow, where the air flow is divided into a plurality of air flows by dividers radiating upward from the heat sink bases' top surfaces and containing cooling fins on the heat sink on only one side of the divider, where each airflow is diverted past the cooling fins of at least one of the heat sinks without significant pre-heating and through the cooling fins of at least one of the other heat sinks.

Abstract: A computer comprising a chassis supporting an electronic component. A fan housing with an axial duct is mounted to the chassis. A blade assembly is rotatably disposed within the duct and comprises a plurality of fan blades that extend radially from a hub to a fan diameter. The axial duct has a chord length at least equal to the fan diameter.

Abstract: A cooling fan comprising a fan housing and a plurality of blades rotatably disposed within a conduit through the fan housing. Each of the plurality of blades extends radially outward from a hub to a tip. The radial gap between the tips of the blades and the conduit defines a tip clearance. The cooling fan further comprises an tip clearance reduction system operable to control the tip clearance.

Abstract: A cooling fan comprising a housing that connects to a chassis that is operable to support an electronic component. An axial duct runs through the housing. A blade assembly is rotatably disposed within the duct and comprises a plurality of fan blades that extend radially from a hub to a fan diameter. The axial duct has a chord length at least equal to the fan diameter. A motor assembly is disposed within the axial duct and coupled to said blade assembly. The cooling fan provides a cooling capacity of at least 1.5 air horsepower per cubic inch volume of the cooling fan.

Abstract: A cooling fan comprising an outer housing. A motor support is fixed to the outer housing and a motor is mounted to the motor support. A hub is rotatably coupled to the motor and, with the motor support, forms a motor enclosure that substantially surrounds the motor. A plurality of blades extend radially from the hub and are arranged so as to generate a flow of air around the motor enclosure when the blades are rotated. The cooling fan also comprises a motor cooler comprising a flow path through the motor enclosure, wherein the flow path has a first opening and a second opening, wherein the second opening is disposed within an area of lowered downstream pressure so as to develop a differential pressure between the first and second openings and generate a flow of air through the motor enclosure as the motor operates.

Abstract: A cooling fan comprising a fan housing and an outer rotor motor that is supported by a motor housing that is supported within a conduit through the fan housing. A hub is rotatably coupled to the outer rotor motor and has a first portion disposed within the motor housing and a second portion disposed outside of the motor housing. A plurality of blades extend radially from the second portion said hub.

Abstract: A cooling fan comprising a housing, an electric motor, a blade assembly, and a first motor control circuit board. The housing is operable to connect to a computer chassis that supports an electronic component. An electric motor is fixably mounted within a volume formed by an inner surface of the housing. A blade assembly is rotatably mounted to the electric motor. A first motor control circuit board is coupled to the electric motor and is disposed externally to the volume formed by the inner surface of said housing.

Abstract: A cooling fan comprising a fan housing that connects to a chassis supporting an electronic device. A motor is disposed within the fan housing. A blade assembly is rotatably coupled to the motor. The fan housing has a length at least 10 mm longer than a distance between a leading edge and a trailing edge of the blade assembly.

Abstract: A cooling fan comprising a housing that connects to a computer chassis supporting an electronic component. A fan blade assembly is disposed within the housing. A windings section is fixably mounted within said housing. The windings section forms a body having opposite ends and a bore there between. A first bearing is disposed outboard of one end of the windings section and rotatably supports the fan blade assembly within the housing.

Abstract: A heat exchanger assembly for use in an electronic assembly having a heat source comprises a heat transfer section and heat dissipation fins. The heat transfer section includes a first portion attachable to the heat source and a second portion extending away from the first portion. The heat dissipation fins have a longitudinal dimension and are attached to at least part of the second portion of the heat transfer section along the longitudinal dimension.

Abstract: In accordance with certain embodiments, a computer system having an electronic component, a heat sink having a contact surface disposed against the electronic component, and at least one blower embedded within fins of the heat sink.

Abstract: A collapsible fan. The collapsible fan may be disposed in parallel or series with one or more other fans. If the collapsible fan becomes inactive or non-operable, such as by malfunction or failure, then its fan blades collapse to a less restrictive flow configuration allowing the remaining fans to operate more effectively. The fan blades may have any suitable expansion and contraction mechanism, such as a hinge, a pivot joint, or a multi-section inner or outer support structure having different sections of the fan blades.