A method of induction welding a first thermoplastic composite (TPC) to a second thermoplastic composite (TPC) includes inductively heating a weld interface area between the first TPC and the second TPC, and cooling a surface of the first TPC opposite the weld interface area while inductively heating the weld interface area.

In one general aspect, a microchannel heat exchanger is disclosed. It includes a cover, a base, and thermally conductive sheets between the cover and the base that each define a series of side-by-side lanes aligned with a flow direction. The lanes each include aligned slots that define microchannel segments and are separated by cross ribs. The sheets are stacked between the base and cover so as to cause at least some of the ribs to be offset from each other and allow the microchannel segments in the same lane in adjacent sheets to communicate with each other along the flow direction to define a plurality of microchannels in the heat exchanger.

The application relates to a high-efficiency phase-change condenser for a supercomputer, including a condenser box body, a refrigerant input pipe, a refrigerant output pipe and a condensing coil; a liquid refrigerant accommodated in the condenser box body, and a gas-phase region existing between a liquid level of the liquid refrigerant and a top of the condenser box body; one portion of the condensing coil immersed into the liquid refrigerant, and the other portion of the condensing coil located in the gas-phase region above the liquid level of the liquid refrigerant; and in the gas-phase region, refrigerant vapor bubbles are liquified by the condensing coil. Liquid-phase and gas-phase saturated refrigerants can be completely condensed by the condensing coil in a limited condenser space, thereby improving heat exchange efficiency of the condenser.

A heat transfer system includes fluid transfer cells that vibrationally move a fluid and a thermally conductive cover that conducts heat from the cells while avoiding transfer of mechanical energy between the cells. A fluid transfer module includes outer and inner walls, a support member, and a membrane. The outer wall has an outer opening. The inner wall has an inner opening. The support member is disposed laterally on the inner wall such that a flow chamber is defined between the outer and inner walls. The membrane is supported by the support member along the outer wall. A fluid transfer module includes an inlet port and an actuator. The actuator undergoes vibrational motion and has first and second vibrational modes. The first vibrational mode causes fluid to enter the inlet port. The second vibrational mode expels fluid from the inlet port, which reduces clogging of the inlet port.

A water block assembly comprising a water block unit and an insulating housing, and a method for insulating a water block unit are provided. The water block unit has an external thermal transfer surface configured to be in contact with a heat generating component to be cooled, and defines an internal fluid conduit for circulating fluid therein, a fluid inlet for feeding fluid into the internal fluid conduit, and a fluid outlet for discharging fluid from the internal fluid conduit. The insulating housing at least partly embeds the water block unit therein to limit heat transfer from the water block unit to a surrounding environment thereof, the insulating housing having an internal surface in contact with the water block unit.

A heat exchange unit includes a heat exchanger, a structure supporting the heat exchanger, an insulating member electrically insulating the heat exchanger from the structure, a compressor electrically connected to the heat exchanger and the structure, and a connection member attached to the heat exchanger. The connection member electrically connects the heat exchanger and the structure. The connection member is provided separately from a first conductive path that electrically connects the compressor and the heat exchanger, and a second conductive path that electrically connects the compressor and the structure.

A cooling apparatus for a medium voltage or high voltage switchgear includes an evaporator, a fluid conduit, and a condenser. The evaporator is configured to surround at least part of a current carrying contact. The fluid conduit fluidly connects the evaporator to the condenser. A section of the fluid conduit is formed within the evaporator and is electrically insulating and is configured such that fluid can contact an outer surface of the current carrying contact. The cooling apparatus is configured such that in use a working fluid in the evaporator is heated to a vapour state, and the vapour is transferred by the fluid conduit to the condenser. The vapour in the condenser is condensed to the working fluid. The condensed working fluid is passively returned via the fluid conduit to the evaporator.

In one instance, an isolator for a heating, ventilating, and cooling (HVAC) system is provided that is a formed plastic member that is disposed between dissimilar metals of the bottom of the condenser and a base pan that supports the condenser or between two dissimilar metals of another HVAC heat exchanger. The isolator separates the two dissimilar metals involved from each of those components and also provides gaps or apertures to drain any water that otherwise might become standing water that potentially causes oxidation or increased oxidation. Other aspects are disclosed.

A heat pipe assembly includes walls having porous wick linings, an insulating layer coupled with at least one of the walls, and an interior chamber sealed by the walls. The linings hold a liquid phase of a working fluid in the interior chamber. The insulating layer is directly against a conductive component of an electromagnetic power conversion device such that heat from the conductive component vaporizes the working fluid in the porous wick lining of the at least one wall and the working fluid condenses at or within the porous wick lining of at least one other wall to cool the conductive component of the electromagnetic power conversion device. The assembly can be placed in direct contact with the device while the device is operating and/or experiencing time-varying magnetic fields that cause the device to operate.

In one instance, an isolator for a heating, ventilating, and cooling (HVAC) system is provided that is a formed plastic member that is disposed between dissimilar metals of the bottom of the condenser and a base pan that supports the condenser or between two dissimilar metals of another HVAC heat exchanger. The isolator separates the two dissimilar metals involved from each of those components and also provides gaps or apertures to drain any water that otherwise might become standing water that potentially causes oxidation or increased oxidation. Other aspects are disclosed.