An electric heating device, in particular for a motor vehicle, includes a housing which has an inlet and outlet opening for a medium to be heated and which encloses a layered structure. The layered stricture comprises at least one PTC element which is electrically conductively connected to conducting elements leading to connections of different polarity, and heat-emitting elements that are conductively connected on both sides to the PTC element. In order to provide improved heat dissipation, the heat-emitting elements include a panel element that is provided with perforations and that is made of a heat-conducting material.

Systems and methods of manufacture of radiator fins. In one embodiment, a radiator fin made of carbon fiber is provided. In one aspect, the radiator fin is made of carbon fibers forming an interlaced pattern. In another aspect, the interlaced carbon fiber radiator fin is attached directly to a heat pipe, the heat pipe connected to a heat source.

Disclosed is a technology based upon the nesting of tubes to provide chemical reactors or chemical reactors with built in heat exchanger. As a chemical reactor, the technology provides the ability to manage the temperature within a process flow for improved performance, control the location of reactions for corrosion control, or implement multiple process steps within the same piece of equipment. As a chemical reactor with built in heat exchanger, the technology can provide large surface areas per unit volume and large heat transfer coefficients. The technology can recover the thermal energy from the product flow to heat the reactant flow to the reactant temperature, significantly reducing the energy needs for accomplishment of a process.

The invention relates to a heat transfer device with channels for heat-absorbing media and channels for heat-emitting media, at least one of the channels having a textile structure with compressed and non-compressed regions. Whilst the compressed regions are disposed in the transition regions between the channels in order to improve the heat transfer to or across the channel wall, the non-compressed regions are disposed in the flow regions of the channels. This construction enables a large heat transfer to the heat transfer surface with simultaneously good heat conduction from the heat transfer surface to the separating surface. The invention likewise relates to heat exchangers with heat transfer devices of this type.

A water heating assembly is disclosed the includes a core heating element and an outer tube in which the core heating element is arranged. Also disclosed are methods for producing and using the water heating assembly.

A reaction device is provided with a first wall that defines an interior in which a stirring mechanism is located. A heat exchanger is at least partly provided on the first outer wall surface facing away from the interior and/or on the stirring mechanism, wherein the heat exchanger has a grate structure, and at least two layers are provided which have a grate structure. Thus, it is possible to transfer heat in a precise and efficient manner primarily by means of thermal radiation in endothermic processes at different temperature levels, in particular pyrolysis, gassing, and reforming processes, and thereby use the exhaust heat for other processes.

An electric heating device, in particular for a motor vehicle, includes a housing which has an inlet and outlet opening for a medium to be heated and which encloses a layered structure. The layered stricture comprises at least one PTC element which is electrically conductively connected to conducting elements leading to connections of different polarity, and heat-emitting elements that are conductively connected on both sides to the PTC element. In order to provide improved heat dissipation, the heat-emitting elements include a panel element that is provided with perforations and that is made of a heat-conducting material.

Systems and methods of manufacture of radiator fins. In one embodiment, a radiator fin made of carbon fiber is provided. In one aspect, the radiator fin is made of carbon fibers forming an interlaced pattern. In another aspect, the interlaced carbon fiber radiator fin is attached directly to a heat pipe, the heat pipe connected to a heat source.

Vessel assemblies, heat transfer units for prefabricated vessels, and methods for heat transfer prefabricated vessel are provided. A heat transfer unit includes a central rod, and a plurality of peripheral rods surrounding the central rod and connected to the central rod. The plurality of peripheral rods are movable between a first collapsed position and a second bowed position, wherein in the second bowed position a midpoint of each of the plurality of peripheral rods is spaced from the central rod relative to in the first position. The heat transfer unit further includes a heat transfer element connected to one of the plurality of peripheral rods.

For a process for producing a motor vehicle interior trim material including or consisting at least essentially of a needlefelt which includes a fibre blend including 25-35 wt % of polyamide (PA) fibres and 65-75 wt % of polyester (PES) fibres, preferably without other, bonding fibres, and is consolidated mechanically by needling and via adhesive bonding, it shall be achieved to provide a needlefelt material, in particular a motor vehicle interior trim material, which has a visually appealing surface finish even after thermoforming in the temperature range between 150 C. and 250 C.