A syngas loop boiler includes a casing that surrounds a tube bundle, wherein the tube bundle includes a plurality of tubes. One end of each of the tubes is joined to a tube-sheet provided with corresponding tube-sheet inlet holes for inletting the syngas in the boiler, wherein each tube-sheet inlet hole is internally provided with at least a protective sleeve welded at both ends to corresponding surfaces of the tube-sheet inlet hole. Each tube-sheet inlet hole is provided with a first respective weld overlay placed at the inlet mouth of the tube-sheet inlet hole, so that a first end of each protective sleeve is welded to the first weld overlay. Each tube-sheet inlet hole is internally provided with at least a bore groove that contains a respective in-bore second weld overlay, so that the second end of the protective sleeve is welded to the in-bore second weld overlay. Each protective sleeve is thus welded at both ends to respective weld overlays, with the possibility of removal and re-installation without performing any post weld heat treatment.

The present invention relates to a heat exchanger for the supply of oxygen or of a gas mixture containing at least 50% oxygen, the temperature at the outlet of the exchanger not being below 300° C., it preferably being above 400° C., the oxygen or the oxygen-rich gas feeding one or more burners of a glass melting furnace, the heat of the combustion gases being used directly or indirectly to heat the oxygen or the oxygen-rich gas in the exchanger, in which the exchange power is between 20 and 300 kW, preferably between 40 and 250 kW and particularly preferably between 80 and 170 kW.

A heat exchange assembly comprising: (I) two or more panels; (II) a plurality of channels formed between the two or more panels; and (III) one or more reservoirs located adjacent to the plurality of channels and configured to at least temporarily store a temperature control material, wherein the plurality of channels are configured to direct a flow path of the temperature control material between the two or more panels and provide structural rigidity to the assembly.

The invention relates to a brazable three-layered aluminum composite material having at least three layers with at least two different aluminum alloys, whereby an inner layer of the at least three layers is an aluminum brazing layer made from an aluminum brazing alloy, the other layers are configured as covering layers and include at least one further aluminum alloy, wherein the at least one further aluminum alloy has a higher solidus temperature than the liquidus temperature of the aluminum brazing alloy. The individual covering layers have a thickness which exceeds the thickness of the aluminum brazing layer by at least a factor of 1.5, preferably by a factor of 5. The brazable aluminum composite material is simply structured, has good brazing properties for the production of butt-joint brazing connections, significantly reduces the risk of a ‘burning through’ of brazed-on components and provides sufficient mechanical properties.

An inventive embodiment comprises a thermalization arrangement at cryogenic temperatures. The arrangement comprises a dielectric substrate (2) layer on which substrate a device/s or component/s (1) are positionable. A heat sink component (4) is attached on another side of the substrate. The arrangement further comprises a conductive layer (5) between the substrate layer (2) and the heat sink component (4). A joint between the substrate layer (2) and the conductive layer (5) has minimal thermal boundary resistance. Another joint between the conductive layer (5) and the cooling heat sink layer (4) is electrically conductive.

An inventive embodiment comprises a thermalization arrangement at cryogenic temperatures. The arrangement comprises a dielectric substrate (2) layer on which substrate a device/s or component/s (1) are positionable. A heat sink component (4) is attached on another side of the substrate. The arrangement further comprises a conductive layer (5) between the substrate layer (2) and the heat sink component (4). A joint between the substrate layer (2) and the conductive layer (5) has minimal thermal boundary resistance. Another joint between the conductive layer (5) and the cooling heat sink layer (4) is electrically conductive.

The heat conduction member comprises a laminate formed by laminating a resin layer and a metal layer. The resin layer is formed from a thermally conductive resin material. The thickness of the laminate is smaller at the peripheral edge of the laminate than in the center portion of the laminate, and the thickness of the laminate is greater in the intermediate portion of the laminate than in the center portion of the laminate. An inclined surface is formed on the laminate so as to form a falling gradient from the intermediate portion toward the peripheral edge.

A heat sink that radiates heat via the metal shell of the electronic device is provided. The upper portion of the heat sink is formed by a solid aluminium block boss, and the lower portion of the heat sink is formed by an aluminium substrate, wherein at least one fin is configured on either side of the solid aluminium block boss.

An article for magnetic heat exchange comprising a magnetocalorically active phase with a NaZn.sub.13-type crystal structure is provided by hydrogenating a bulk precursor article. The bulk precursor article is heated from a temperature of less than 50° C. to at least 300° C. in an inert atmosphere and hydrogen gas only introduced when a temperature of at least 300° C. is reached. The bulk precursor article is maintained in a hydrogen containing atmosphere at a temperature in the range 300° C. to 700° C. for a selected duration of time, and then cooled to a temperature of less than 50° C.

A pre-flux coating for the manufacturing of heat exchanger components of aluminum, wherein the coating comprises a combination of fluxes in the form of potassium aluminum fluoride K.sub.1-3AlF.sub.4-6, potassium trifluoro zincate, KZnF.sub.3, lithium aluminum fluoride Li.sub.3AlF.sub.6, a filler material in the form of metallic Si particles, Al—Si particles and/or potassium fluoro silicate K.sub.2SiF.sub.6, an additive in the form of aluminum oxide and at least one other oxide selected from the group consisting of zinc oxide, titanium oxide and cerium oxide forming a post braze ceramic layer, and a solvent and a binder containing at least 10% by weight of a synthetic resin which is based, as its main constituent, on a methacrylate homopolymer or a methacrylate copolymer.