摘要:
Plate heat exchanger has heat transfer plates which exhibit a patterning and are stacked one above the other. Primary sided flow channels for a first heat exchanger medium to be evaporated, and secondary sided channels for a second heat exchanger heat carrier medium are formed between the plates. The primary sided and/or the secondary sided flow channels are formed between two adjacent heat transfer plates, whose patterning meshes at least partially, while maintaining a minimum spacing.
摘要:
A combined component for afterburning anode exhaust gases from a fuel cell system and for vaporizing educts to be fed to the fuel cell system has an exhaust gas catalyzer for afterburning the anode exhaust gases, with a substantially cylindrical casing having an inlet and an outlet connection disposed coaxially to the long axis of the casing, one on a casing cover and the other on a casing bottom. A first gas-permeable inner tube is disposed coaxially to the long axis of the casing and fixedly joined at the gas inlet end to the casing cover, while a second gas-permeable outer tube which is also disposed coaxially with the long axis of the casing and has a radius rA greater than the radius rI of the inner tube but smaller than the radius rG of the casing. The latter is connected gas-tight to the casing cover at the inlet end. A bulk catalyst is disposed in the area between the inner and the outer tube for the catalytic oxidation of the anode exhaust gas. At least one educt to be fed to the fuel cell system is provided in the area between the inner tube and the outer tube, and at least one set of educt flow tubes of the evaporator, through which the educt to be evaporated flows, are carried around the inner tube of the exhaust gas catalyst.
摘要:
An evaporator unit in the form of a plate construction has evaporation spaces and heat transfer medium spaces respectively arranged between successive plates. The plates have an essentially circular construction and have recesses for forming inflow and outflow lines for the medium to be evaporated and for a heat transfer medium which extend perpendicularly to the plates. The inflow line for the medium to be evaporated is arranged in the area of the center of the circular plates. The outflow lines for the evaporated medium and for the heat transfer medium are arranged in the circumferential area of the circular plates. For the heat transfer medium, several inflow lines can be provided at a radial distance from the center of the circular plates between the inflow line and the outflow lines for the medium to be evaporated.