A contoured branch fitting for reducing stress in a header pipe caused by acoustic induced vibration that includes a maximum width, a maximum length, a thickness that is greater along the maximum length and a constant radius between the branch connection and the header connection.

A heat exchanger includes a plurality of first and second fluid passages. The first fluid passages are defined by a pair of opposing first fluid passage walls and a plurality of first fluid diverters disposed between the first fluid passages walls. The second fluid passages are defined by a pair of opposing second fluid passage walls and a plurality of second fluid diverters disposed between the second fluid passage walls. The second fluid diverters include a body portion and a leading edge portion. The first fluid passage walls form a first fluid leading edge that extends upstream of the leading edge portion of the second fluid diverters. The second fluid passages extend in a direction perpendicular to the direction of the first fluid passages.

A multiple layer metallic laminate including a metallic layer of high heat dispersion characteristics and a thermal barrier material interlaid within the metallic layer. The laminate can include multiple metallic layers having either high heat dispersion characteristics or lesser heat dispersion characteristics. The thermal barrier material can separate portions of the high heat dispersion metallic layers from one another to minimize heat dispersion into isolated portions.

High heat flux furnace cooler comprise CuNi pipe coils cast inside pours of high purity (99%-Wt) copper. The depth of front copper cover over the pipe coils in the hot face to manufacture into the casting is derived from a projection of the thermal and stress conditions existing at the cooler's end-of-campaign-life. CFD and/or FEA analyses and modeling is used for a trial-and-error zeroing in of the optimum geometries to employ in the original casting of CuNi pipe coils in high purity copper casting. Individual pipe coil positions to cast inside a copper casting mold are secured with devices that will not melt, cause thermal shear stresses, or be the source of contaminations or copper defects. Pipe bonding to the casting results because the differential coefficient of expansions of the pipes' and the casting's copper alloys involved do not exceed the yield strength of the casting copper during operational thermal cycling.

A radiant heater includes a generally U-shaped radiative heating element having a first straight section, a second straight section, and an interconnecting U-shaped section. The non-connected end of the first straight section is arranged for communication with a burner and the non-connected end of the second straight section is arranged for communication with an extractor for extracting combustion gases from the tube. A redirecting element including opposed helical vanes, each executing a 180 turn about a central, common tube, is arranged within the first straight section so as to redirect, in use, at least a portion of the combusted gases flowing within the upper half of the tube towards the lower half, and gases flowing in the lower half towards the upper half.

A method for joining a first metal part with a second metal part, the metal parts having a solidus temperature above 1000 C. The method includes applying a melting depressant composition on a surface of the first metal part, the melting depressant composition including a melting depressant component that includes phosphorus and silicon for decreasing a melting temperature of the first metal part; bringing the second metal part into contact with the melting depressant composition at a contact point on said surface; heating the first and second metal parts to a temperature above 1000 C.; and allowing a melted metal layer of the first metal component to solidify, such that a joint is obtained at the contact point. The melting depressant composition and related products are also described.

A clustered heat dissipation device and a chassis are provided. The clustered heat dissipation device includes a heat-absorbing manifold, plural heat-absorbing heads and plural connection pipes. The heat-absorbing manifold includes an inlet chamber and an outlet chamber. The inlet chamber includes at least one first liquid inlet and plural first liquid outlets. The outlet chamber includes plural second liquid inlets and at least one second liquid outlet. The heat-absorbing manifold is in thermal contact with a first heat source. The plural connection pipes are connected with the heat-absorbing heads and the corresponding first liquid outlets and connected with the heat-absorbing heads and the corresponding second liquid inlets.

A brazed heat exchanger includes plates that are stacked or nested to define flow channels for multiple media. Inserts are arranged within at least some of the flow channels. Two different braze alloys having compositions based on different metals are used to form braze joints between the plates and the inserts. In some cases, a copper-based braze alloy is used for joints corresponding to flow channels for one of the media in order to provide high pressure-resisting strength to those flow channels, while an iron-based braze alloy is used for joints corresponding to flow channels for another of the media where dissolved copper is undesirable.

In an all-aluminum heat exchanger using aluminum as a material of a refrigerant pipe, a dissimilar metal contact with a bottom plate, which is made of iron, of an outdoor unit increases a risk of corrosion of the refrigerant pipe. An outdoor unit for an air-conditioning apparatus includes a placement plate, which is provided on a bottom plate of a casing and has a heat exchanger placement surface having a planar shape on which the heat exchanger is placed. With this configuration, water and dust generated in the casing can be caused to drop from the heat exchanger placement surface to the bottom plate and discharged to an outside of the casing. As a result, even when the all-aluminum heat exchanger is used as a heat exchanger of an air-conditioning apparatus, leakage of refrigerant can be prevented.

A reboiler in fluid communication with a fractionator column in an offshore low temperature process removing carbon dioxide from natural gas has a vessel volume. A carbon steel tubing bundle is disposed within the vessel volume. Each tube in the bundle has an outer surface with a porous granular metal layer deposited thereon. The granular metal layer comprises a pore size distribution which promotes bubble nucleation during vaporization of a nearly pure liquid carbon dioxide stream.