Abstract: A redundant heat sink module can include a first independent coolant pathway and a second independent coolant pathway. The first independent coolant pathway can include a first inlet chamber, a first outlet chamber, and a first plurality of orifices extending from the first inlet chamber to the first outlet chamber and providing a first plurality of impinging jet streams of coolant against a first region of a surface to be cooled when pressurized coolant is provided to the first inlet chamber. The second independent coolant pathway can include a second inlet chamber, a second outlet chamber, and a second plurality of orifices extending from the second inlet chamber to the second outlet chamber and providing a second plurality of impinging jet streams of coolant against a second region of the surface to be cooled when pressurized coolant is provided to the second inlet chamber.

Abstract: A redundant heat sink module can include a first independent coolant pathway and a second independent coolant pathway. The first independent coolant pathway can include a first inlet chamber, a first outlet chamber, and a first plurality of orifices extending from the first inlet chamber to the first outlet chamber and providing a first plurality of impinging jet streams of coolant against a first region of a surface to be cooled when pressurized coolant is provided to the first inlet chamber. The second independent coolant pathway can include a second inlet chamber, a second outlet chamber, and a second plurality of orifices extending from the second inlet chamber to the second outlet chamber and providing a second plurality of impinging jet streams of coolant against a second region of the surface to be cooled when pressurized coolant is provided to the second inlet chamber.

Abstract: A redundant heat sink module can include a first independent coolant pathway and a second independent coolant pathway. The first independent coolant pathway can include a first inlet chamber, a first outlet chamber, and a first plurality of orifices extending from the first inlet chamber to the first outlet chamber and providing a first plurality of impinging jet streams of coolant against a first region of a surface to be cooled when pressurized coolant is provided to the first inlet chamber. The second independent coolant pathway can include a second inlet chamber, a second outlet chamber, and a second plurality of orifices extending from the second inlet chamber to the second outlet chamber and providing a second plurality of impinging jet streams of coolant against a second region of the surface to be cooled when pressurized coolant is provided to the second inlet chamber.

Abstract: A method of cooling two or more heat-providing surfaces using a cooling apparatus having two or more fluidly connected heat sink modules in a series configuration can include providing a flow of single-phase liquid coolant to a first heat sink module mounted on a first heat-providing surface. The method can include projecting the flow of single-phase liquid coolant against the first heat-providing surface within the first heat sink module and causing phase change of a first portion of the liquid coolant and thereby forming two-phase bubbly flow with a first quality. The method can include transporting the two-phase bubbly flow to a second heat sink module and projecting the two-phase bubbly flow against a second heat-providing surface within the second heat sink module and causing phase change of a second portion of the coolant and formation of two-phase bubbly flow with a second quality greater than the first quality.

Abstract: A flexible two-phase cooling apparatus for cooling microprocessors in servers can include a primary cooling loop, a first bypass, and a second bypass. The primary cooling loop can include a reservoir, a pump, an inlet manifold, an outlet manifold, and flexible cooling lines extending from the inlet manifold to the outlet manifold. The flexible cooling lines can be routable within server housings and can be fluidly connected to two or more series-connected heat sink modules that are mountable on microprocessors of the servers. The flexible cooling lines can be configured to transport low-pressure, two-phase dielectric coolant. The first bypass can include a first pressure regulator configured to regulate a first bypass flow of coolant through the first bypass. The second bypass can include a second pressure regulator configured to regulate a second bypass flow of coolant through the second bypass.

Abstract: A microprocessor assembly adapted for fluid cooling can include a semiconductor die mounted on a substrate. The semiconductor die can include an integrated circuit with a two-dimensional and/or three-dimensional circuit architecture. The assembly can include a heat sink module in thermal communication with the semiconductor die. The heat sink module can include an inlet port fluidly connected to an inlet chamber, a plurality of orifices fluidly connecting the inlet chamber to an outlet chamber, and an outlet port fluidly connected to the outlet chamber. When pressurized coolant is delivered to the inlet chamber, the plurality of orifices can provide jet streams of coolant into the outlet chamber and against a surface to be cooled to provide fluid cooling suitable to control a semiconductor die temperature during operation.

Abstract: A heat sink module for cooling a heat providing surface can include an inlet chamber and an outlet chamber formed within the heat sink module. The outlet chamber can have an open portion that can be enclosed by the heat providing surface when the heat sink module is installed on the heat providing surface. The heat sink module can include a dividing member disposed between the inlet chamber and the outlet chamber. The dividing member can include a first plurality of orifices extending from a top surface of the dividing member to a bottom surface of the dividing member. The first plurality of orifices can be configured to deliver a plurality of jet streams of coolant into the outlet chamber and against the heat providing surface when the heat sink module is installed on the heat providing surface and when pressurized coolant is provided to the inlet chamber.

Abstract: A multi-chamber heat sink module can provide fluid cooling of one or more heat providing surfaces. The module can include a first plurality of orifices fluidly connecting a first inlet chamber to a first outlet chamber. The first outlet chamber can be configured to be bounded by a portion of a heat providing surface. The first plurality of orifices can be configured to deliver a first plurality of jet streams of coolant into the first outlet chamber and against the portion of the heat providing surface when the heat sink module is installed on the heat providing surface and when pressurized coolant is provided to the first inlet chamber. The heat sink module can include a second inlet chamber fluidly connected to a first outlet passage and a second plurality of orifices fluidly connecting the second inlet chamber to a second outlet chamber.

Abstract: A hot-swappable server can be adapted to blindly mate to a manifold assembly of a cooling system. The server can include a chassis with a circuit board positioned within the chassis and a first processor electrically connected to the circuit board. The server can include a cooling line assembly with an inlet fitting, an outlet fitting, and a heat sink module fluidly connected between the inlet and outlet fittings. The first heat sink module can be in thermal communication with the first processor. The inlet and outlet fittings can be mounted to the chassis proximate a rear side of the chassis. The inlet and outlet fittings can be blind-mate fittings. Coolant flowing through the cooling line assembly can flow in through the inlet fitting, through the first heat sink module where it absorbs heat from the first processor, and out through the outlet fitting.

Abstract: A redundant heat sink module can include a first independent coolant pathway and a second independent coolant pathway. The first independent coolant pathway can include a first inlet chamber, a first outlet chamber, and a first plurality of orifices extending from the first inlet chamber to the first outlet chamber and providing a first plurality of impinging jet streams of coolant against a first region of a surface to be cooled when pressurized coolant is provided to the first inlet chamber. The second independent coolant pathway can include a second inlet chamber, a second outlet chamber, and a second plurality of orifices extending from the second inlet chamber to the second outlet chamber and providing a second plurality of impinging jet streams of coolant against a second region of the surface to be cooled when pressurized coolant is provided to the second inlet chamber.