A flat tube for a heat exchanger may include a longitudinal-end inlet for letting a fluid into the flat tube, and a longitudinal-end outlet spaced apart from the inlet in a longitudinal direction for letting the fluid out from the flat tube. The flat tube may also include flow elements around at least a portion of which the fluid may be flowable around the flow elements in such a manner that the fluid may have a flow direction component perpendicular to the longitudinal direction. The outlet and the inlet each may be delimited on a partial cross-sectional area of the flat tube and arranged diagonally opposite one another.

A fuel cell device includes: a reformer that generates a reformed gas; a fuel cell; a combustor that combusts off-gas of the reformed gas and air for power generation, and generates a combustion exhaust gas; a first air heat exchanger that has a combustion exhaust gas path and a first air supply path, and that performs heat exchange between the combustion exhaust gas and the air for power generation; a fuel cell storage which stores the fuel cell; a second air heat exchanger that has a second air supply path that supplies the air for power generation to the fuel cell, and that performs heat exchange between the off-gas of the air for power generation and the air for power generation; and a housing that stores members. The first air supply path and the second air supply path are disposed to cover whole members stored in the housing.

An air-over evaporative heat exchanger with multi-lobed or “peanut” shaped tubes replacing conventional round or elliptical tubes. The tubes have a narrow horizontal cross section and tall vertical cross section to allow the multiplication of surface area in the same coil volume while maintaining or increasing the open-air passage area. This configuration allows the coil to have an overall external heat transfer coefficient much higher than a conventional coil, while the tube shape allows the use of thinner material, reducing the weight and cost of the heat exchanger.

An air-over evaporative heat exchanger with multi-lobed or “peanut” shaped tubes replacing conventional round or elliptical tubes. The tubes have a narrow horizontal cross section and tall vertical cross section to allow the multiplication of surface area in the same coil volume while maintaining or increasing the open-air passage area. This configuration allows the coil to have an overall external heat transfer coefficient much higher than a conventional coil, while the tube shape allows the use of thinner material, reducing the weight and cost of the heat exchanger.

A method of forming a refrigeration heat exchanger comprising a suction line and a capillary line includes juxtaposing at least a portion of the suction and capillary lines to form a juxtaposed portion, at least partially enveloping the juxtaposed portion with a metal material, and encapsulating the capillary line to the suction line along at least a portion of the juxtaposed portion.

A method of forming a refrigeration heat exchanger comprising a suction line and a capillary line includes juxtaposing at least a portion of the suction and capillary lines to form a juxtaposed portion, at least partially enveloping the juxtaposed portion with a metal material, and encapsulating the capillary line to the suction line along at least a portion of the juxtaposed portion.

Provided is a heat exchanger in which first flow paths for flowing a first fluid and second flow paths for flowing a second fluid are arranged adjacent via a partition wall through which heat exchange is performed. The partition wall includes parallel tubular partition walls inside of which is the first flow paths. At least a part of the tubular partition walls in a flow path direction are integrally coupled to form a partition wall coupling portion having a geometric pattern in transverse cross section. An element figure of the geometric pattern corresponding to a transverse cross-sectional shape of the tubular partition wall is connected to each other at a vertex, and the number of sides of the element figure gathering at the vertex is an even number. In the partition wall coupling portion, the second flow paths are defined between outer peripheral surfaces of the surrounding tubular partition walls.

A heat exchanger core includes a first hollow cylinder extending circumferentially around a center axis and extending axially along the center axis. The first hollow cylinder includes a first passage disposed radially within the first hollow cylinder and extending axially through the first hollow cylinder. A second hollow cylinder extends circumferentially around the center axis and extends axially along the center axis. The first hollow cylinder is disposed radially within the second hollow cylinder. The second hollow cylinder includes a second passage disposed radially between the first hollow cylinder and the second hollow cylinder and extending axially between the first hollow cylinder and the second hollow cylinder. The first hollow cylinder fluidically separates the first passage from the second passage. The first and second hollow cylinders and the first and second passages are spaced from one another in a sinusoidal relationship.

An inclined heat exchanger for use in a motor vehicle. The heat exchanger contains at least two flat tubes and at least two corrugated fins. The flat tubes and the corrugated fins are stacked alternately one above the other in a height direction (HR) to form a stack. The corrugated fins include a rhombic cross-section. A corrugated fin is also provided for use in the heat exchanger, as well as a method for manufacturing the corrugated fin.

An inclined heat exchanger for use in a motor vehicle. The heat exchanger contains at least two flat tubes and at least two corrugated fins. The flat tubes and the corrugated fins are stacked alternately one above the other in a height direction (HR) to form a stack. The corrugated fins include a rhombic cross-section. A corrugated fin is also provided for use in the heat exchanger, as well as a method for manufacturing the corrugated fin.