Abstract:
A gas cooled dynamoelectric machine is provided that is comprised of a rotor (10), a rotor winding comprising axially extending coils (22) and concentric endwindings (28), and a plurality of spaceblocks (140, 240, 340) located between adjacent endwinding (28) thereby to define a plurality of cavities (142), each bounded by adjacent spaceblocks and adjacent endwindings. To enhance the heat transfer rate from the copper end turns of the field endwinding region, one or more of the spaceblocks are formed from or coated with a high thermal conductivity material to improve heat transfer from the endwindings engaged therewith.
Abstract:
A gas cooled dynamoelectric machine is provided that is comprised of a rotor (10), a rotor winding comprising axially extending coils (22) and concentric endwindings (28), and a plurality of spaceblocks (140, 240) located between adjacent endwindings (28) thereby to define a plurality of cavities (142, 242), each bounded by adjacent spaceblocks (140, 240) and adjacent endwindings (28). To enhance the heat transfer rate from the copper end turns (27) of the field endwinding region, at least one scoop structure (156, 256) is provided adjacent the radially inner end of a cavity facing surface (144, 244) of at least one spaceblock (140, 240) for intercepting and redirecting coolant flow into the respective cavity (142, 242). The spaceblock itself may have curved upstream and/or downstream surfaces (244, 262) for facilitating circulating coolant flow.
Abstract:
A system (10) is disclosed for generating energy from a geothermal heat source (14). The system includes a fluid injection system (12) configured for injecting fluid into a subterranean formation and a fluid extraction system configured for extracting fluid from the subterranean formation after being heated by the formation. The system further includes a heat transformer (18) configured to receive a first fluid (44) heated by the geothermal heat source (14) at a first temperature and adapted to heat a second fluid (50) to a second temperature via a series of chemical reactions. Furthermore, the system includes an energy generation unit (20) configured to receive heated the second fluid at the second temperature from the heat transformer to increase the temperature of a third fluid (53) which is used to generate energy.
Abstract:
A gas cooled dynamoelectric machine is provided that includes a rotor (10) having a body portion (14), axially extending coils (22), endwindings (28), and a plurality of spaceblocks (150, 152, 154, 156, 158) disposed between the endwindings, so that a plurality of cavities (142, 1 §& 44, 146, 148) are defined between mutually adjacent endwindings and spaceblocks. To increase endwinding cooling, at least one of the spaceblocks (150, 152, 154, 156, 158) has a passage (160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184, 186) extending between first and second adjacent cavities to provide for cooling flow communication between the first and second cavities through the spaceblock. A flow deflector (188, 190) is preferably provided adjacent a radially inner end of one, the other, or both of the cavity facing surfaces of the spaceblock for directing flow into or out of the first and second cavities, respectively.
Abstract:
A gas cooled dynamoelectric machine is provided that includes a rotor 10 having a body portion (14), axially extending coils (22), endwindings (28), and a plurality of spaceblocks (140, 240, 340, 440) disposed between the endwindings, so that a plurality of cavities (142, 242, 342) are defined between mutually adjacent endwindings and spaceblocks. To cool the endwindings, at least one of the spaceblocks has a radially-extending duct (144, 244, 344, 444) with an outlet opening (146, 246, 248, 362, 462) disposed to direct cooling gas flowing therethrough generally in the direction of the central region of the adjacent cavity.
Abstract:
A gas cooled dynamoelectric machine is provided that is comprised of a rotor 10, a rotor winding comprising axially extending coils 22 and concentric endwindings 28, and a plurality of spaceblocks 140 located between adjacent endwindings 28 thereby to define a plurality of cavities 142, each bounded by adjacent spaceblocks and adjacent endwindings. To enhance the heat transfer rate from the copper end turns of the field endwinding region, at least one spaceblock has a trailing edge or downstream wall 146 contoured to reduce generated wake. In a preferred embodiment, the trailing edge has an aerodynamic contour to reduce the extent and strength of the generated wake.
Abstract:
A gas cooled dynamoelectric machine is provided that is comprised of a rotor 10, a rotor winding comprising axially extending coils (22) and concentric endwindings (28), and a plurality of spaceblocks (140), (240) located between adjacent endwindings thereby to define a plurality of cavities (142), (242), each bounded by adjacent spaceblocks (140), (240) and adjacent endwindings (28). To enhance the heat transfer rate from the copper end turns of the filed endwinding region, at least one flow deflector structure (144), (244) is provided on a cavity facing surface (146), (246) of at least one spaceblock (140), (240) for intercepting and redirecting circulating coolant flow towards a central region of the respective cavity 1429, (242).
Abstract:
A locking device providing thermal management for an electrical assembly board is described and includes a fluid-permeable member saturated with a fluid and disposed between the electrical assembly board and a heat sink; a pair of locking device substrates substantially orthogonal to the electrical assembly board and the heat sink; and an actuator coupled to at least one of the locking device substrates. The fluid--permeable member is disposed between the locking device substrates. The actuator is configured to compress the fluid-permeable member by at least one of the locking device substrates forcing a portion of the fluid out of the fluid-permeable member and forming at least one fluid contact interface with the electrical assembly board and the heat sink in a reversible process. A method for making a locking device is also described.
Abstract:
An outlet guide vane assembly for turbomachines is provided. The outlet guide vane assembly comprises one or more outlet guide vanes (21), wherein each of the one or more outlet guide vanes (21) comprises a first surface (54) and a second surface (56), and wherein the one or more outlet guide vanes (21) are disposed between an inner wall (23) and an outer wall (48) of an engine (10) and a surface cooler layer (62) disposed on at least a portion of the first surface (54), the second surface (56), or both of the one or more outlet guide vanes (21), wherein the surface cooler layer (62) comprises a metal foam, a carbon foam, or a combination thereof, wherein the metal foam, the carbon foam or the combination thereof is configured to augment heat transfer and enhance acoustic absorption.