In an inner fin, a plate is made up of a top part, a bottom part, and a wall plate part, and a channel having a concave-shaped cross section and a channel having an inverted concave-shaped cross section are alternately repeated as channels of the gas by a pair of the wall plate parts facing each other. The wall plate part for each of the channels has a shape in which the wall plate part is bent left and right in a serpentine shape and projected and recessed parts thereof are alternately repeated and formed, and the recessed part of the wall plate part is formed with a chevron-shaped part made up of an upward slope part that ranges from a base part to the top part and a downward slope part that passes downward from the top part to a neighboring base part.

A plate (1) for a heat exchanger for heat exchange between a first and a second medium is configured with inlet and outlet portholes (2a and 2b) for the first medium and inlet and outlet portholes (3a and 3b) for the second medium and with a first heat transferring surface (A) for the first medium and a second heat transferring surface (B) for the second medium. The first heat transferring surface (A) is configured with at least one barrier (5) which forms part of a guide for the flow of the first medium when said first medium passes between the portholes (2a, 2b) therefor, and the plate (1) is configured with the portholes (2a, 2b and 3a, 3b) for the first and second medium respectively, and with the barrier located so relative to each other on the first heat transferring surface that they permit formation of a U-shaped or sinusoidal through-flow duct for the first medium which will permit passage of the flow thereof around the inlet porthole (3a) or both portholes (3a, 3b) for the second medium during passage of said first medium between the portholes therefor. A heat exchanger comprises a stack of the above-mentioned plates. An air cooler comprises the above-mentioned heat exchanger.

A heat exchanger plate having a planar plate having an inlet and outlet proximate to a first edge of the heat exchanger plate. The planar plate having a plurality of ribs and a plurality of channels, with the plurality of channels being in a plane different from the planar plate. The plurality of channels being in fluid communication from the inlet to the outlet permitting fluid flow from the inlet to the outlet. A protrusion coupled to the planar plate proximate to the first edge of the heat exchanger plate and laterally extending from an axis, with the heat exchanger plate being susceptible to bending about the axis.

A plate for a heat exchanger between a first medium and a second medium, the plate being associated with a main plane of extension and a main longitudinal direction and including a first heat transfer surface, extending substantially in parallel to the main plane and arranged to be in contact with the first medium, generally flowing along the first surface in a first flow direction; and a second heat transfer surface, extending substantially in parallel to the main plane and arranged to be in contact with the second medium, generally flowing along the second surface in a second flow direction. The first surface includes protruding ridges defining at least two parallel and open-ended channels extending in the first flow direction. The second surface includes a plurality of protruding dimples arranged in the channels between neighbouring respective pairs of the ridges.

A plate (1) for a heat exchange arrangement has a first heat transferring surface (A) with a protrusion (7) forming a continuous and closed ridge. This ridge divides said surface into a closed inner region (A1) and an outer region (A2). The inner region (A1) encloses a first inlet porthole (2) and a first outlet porthole (5) for a first medium. The outer region (A2) has a second inlet porthole (3) and a second outlet porthole (6) for the first medium. A heat exchange arrangement comprises a stack of first and second plates of the above type. The protrusions (7) on the first heat transferring surfaces (A) of said plates are connected to each other to separate first channels into first and second flow paths for the first medium. Each first flow path is configured to direct the first medium from a first inlet to a first outlet inside the inner region (A1) and each second flow path is configured to direct the first medium from a second inlet to a second outlet in the outer region (A2), said inlets and outlets being defined between said inlet and outlet portholes (2, 3 and 5, 6 respectively).

The present invention relates to composition comprising a blend of at least one boron source and at least one silicon source, and the composition further comprises particles selected from particles having wear resistance properties, particles having surface enhancing properties, particles having catalytic properties or combinations thereof, wherein the blend comprises boron and silicon in a weight ratio boron to silicon within a range from about 3:100 wt:wt to about 100:3 wt:wt, wherein silicon and boron are present in the blend in at least 25 wt %, and wherein the at least one boron source and the at least one silicon source are oxygen free except for inevitable amounts of contaminating oxygen, and wherein the blend is a mechanical blend of particles in and the particles have an average particle size less than 250 m. The present invention relates further to a method for providing a coated product and a coated product obtained by the method.

This document describes techniques for implementing phase-change cooling in a three-dimensional structure. A three-dimensional structure having three-dimensional curvatures is fabricated to include a phase-change chamber with a fluid in a saturated thermodynamic state. As part of fabrication, specific mechanisms may be included that create a thermo-mechanical network that improves thermal performance of the phase-change chamber and also provides structural integrity to the three-dimensional structure.

A heat exchange plate for a plate-type heat exchanger and a plate-type heat exchanger provided with said heat exchange plate. The heat exchange plate includes an opening used to form an end opening, a plurality of protrusions arranged around at least a portion of the opening along a circular line along the opening, the plurality of protrusions protruding towards one side of a plate plane; transition portions arranged between at least two neighbouring protrusions, the transition portions being located on one side of the plate plane, and being a preset distance from the plate plane. The distance from the tops of the protrusions to the plate plane is greater than the distance from the lowest points of the transition portions to the plate plane.

A heat pipe with a non-condensable gas includes a thermal conductor, and a working fluid and a non-condensable gas filled into a hollow chamber of the thermal conductor, and the thermal conductor has a heat-absorbing side attached to a heat-generating electronic component and an exothermal side attached to a radiator, and the exothermal side has at least one protrusion, and the exothermal side with the protrusion can reduce the contact area with the radiator, and the heat pipe lowers the conduction efficiency by the non-condensable gas and the protrusion, so as to achieve a work efficiency of the heat-generating electronic component in an operation within a working temperature range.

A high-efficiency plate type heat exchanger increases a heat-exchanging efficiency with an exhaust gas by connecting unit fluidized beds formed with stacked heat exchanging plates to each other in up and down directions, and elongating a flow path of circulating water to be greater than or equal to two passes (2-PASS). The heat exchanger retrieves heat of an exhaust gas by increasing a flow amount of circulating water of a portion close to a burner while a circulation path is elongated as described above. In addition, the high-efficiency plate type heat exchanger increases efficiency thereof by inserting a baffle plate having distribution holes between unit fluidized beds, controlling a flow of an exhaust gas while reducing an exhaust speed of the exhaust gas using heat exchanging fins of the baffle plate, absorbing heat of the exhaust gas, and effectively using a heat transfer area.