A plate fin heat exchanger comprises a circular section tubular shell. The shell comprises a plurality of first shell openings arranged along a length of the shell and a plurality of second shell openings arranged along a length of the shell. A first fluid plenum is provided on the shell in fluid communication with the first shell openings. A second fluid plenum is provided on the shell in fluid communication with the second shell openings. The heat exchanger further comprises a core extending axially within the tubular shell. The core comprises an axially extending first core passage and a second axially extending core passage isolated from the first core passage.

A thermal management system comprising a fluid channel with a plurality of parallel first flow paths extending along a first level in a first thermal mass and a plurality of parallel second flow paths extending along a second level in a second thermal mass are described. Methods for controlling the temperature of a substrate or heater surface and fluid manifolds are also described.

A technique to additively print onto a dissimilar material, especially ceramics and glasses (e.g., semiconductors, graphite, diamond, other metals) is disclosed herein. The technique enables manufacture of heat removal devices and other deposited structures, especially on heat sensitive substrates. It also enables novel composites through additive manufacturing. The process enables rapid bonding, orders-of-magnitude faster than conventional techniques.

A technique to additively print onto a dissimilar material, especially ceramics and glasses (e.g., semiconductors, graphite, diamond, other metals) is disclosed herein. The technique enables manufacture of heat removal devices and other deposited structures, especially on heat sensitive substrates. It also enables novel composites through additive manufacturing. The process enables rapid bonding, orders-of-magnitude faster than conventional techniques.

An ordered, 3-dimensional, micro-scale, open-cellular truss structure including interconnected hollow polymer tubes. The hollow micro-truss structure separates two fluid volumes which can be independently pressurized or depressurized to control flow, or materials properties, or both. Applications for this invention include deployable structures, inflatable structures, flow control, and vented padding.

A microchannel heat exchanger includes at least one manifold and at least one a microchannel tube. The microchannel tube includes a plurality of ports, and the microchannel tube extends from the at least one manifold. The plurality of ports each have a width and a height. The microchannel heat exchanger further includes at least one fin extending from the at least one manifold. The fins are arranged between the at least one microchannel tube and a second microchannel tube. The microchannel heat exchanger further includes a refrigerant arranged to flow through the microchannel tube. At least one port of the plurality of ports has a cross-section area less than 0.35 millimeters squared.

A flat heat pipe with a two-phase liquid-vapor working fluid, includes a first plate receiving thermal energy from a heat source, a second plate transferring thermal energy to a cold source, an edge to form a hermetically sealed enclosed internal space, a capillary structure interposed between the first and second plates, vaporization channels adjacent to the first plate, condensation channels adjacent to the second plate, a transfer passage placing the evaporation channels in communication with the condensation channels for the transport of vapor, and a collection channel forming a reservoir, in fluid communication with each condensation channel. The collection channel is adjacent to the second plate, such that the collection channel can pump and store the excess liquid phase.

A heat exchanger for a motor vehicle includes first fluid lines of a flexible material, through which a first fluid (F.sub.1) flows, and a holding structure with holding elements. The first fluid lines and the holding elements form a woven structure. The holding elements are in a thread-like manner and extend along a second direction of extension (R.sub.2), at right angles to a first direction of extension (R.sub.1). The heat exchanger, through which a second fluid (F.sub.2) flows, is separated from the first fluid (F.sub.1). The woven structure includes a first and second partial woven structures and are formed separately. The first partial woven structure and the second partial structure are arranged so that the second fluid (F.sub.2) flows through the woven structure space, formed between the two partial woven structures. The first and the second partial woven structures are at an angle relative to one another.

A heat exchanger includes a plurality of heat exchange layers stacked in a stackwise direction. Each of the layers includes a first plate and a second plate, each of the first plate and the second plate includes a portion of a first enclosed header, a second enclosed header and at least one flow channel that extends between the first enclosed header and the second enclosed header. The first plate and the second plate are fixedly attached to one another to completely define the first enclosed header, the second enclosed header, and the at least one flow channel. An inlet header is in fluid communication with the first enclosed header of each of the plurality of heat exchange layers to direct a flow of fluid to the heat exchange layers. An outlet header is in fluid communication with the second enclosed header of each of the plurality of heat exchange layers to direct the flow of fluid from the heat exchange layers. The heat exchanger also includes a plurality of fins with each positioned between adjacent heat exchange layers.

A register for the indirect heat exchange between a utility fluid containing interfering components and a heat transfer fluid has at least one tube row with at least one flow channel with a small channel width and at least one flow channel with a large channel width. Additionally, in at least one tube row there is provided at least one flow channel with a narrow section defined by a small channel width as well as a wide section defined by a large channel width. The large channel width produces a large flow velocity of the utility fluid and the small channel width produces a small flow velocity of the utility fluid.