Abstract: Tunnel oven for the industrial production of baked goods; having a baking chamber with an air-permeable, endlessly circulating conveyor belt, which is set up for conveying baked goods in a conveying direction through the baking chamber; a plurality of bottom-heat air outlet nozzles, which are arranged below the conveyor belt and are directed towards the underside of the conveyor belt, wherein the bottom-heat air outlet nozzles generate a bottom-heat inlet air flow directed directly towards the underside of the conveyor belt; a plurality of bottom-heat air inlets, which are distributed in a planar manner below the conveyor belt, in order to discharge bottom-heat exhaust air below the conveyor belt; wherein the bottom-heat exhaust air is sucked off by means of a fan and is supplied heated by thermo oil as the bottom-heat inlet air flow, so that a bottom-heat convection circuit is generated.

Abstract: A method and an apparatus for heating a sheet material made of an electrically conductive, non-magnetic material, the apparatus including at least one coil arrangement with DC-carrying windings that is made to rotate around an axis oriented perpendicular to the sheet material and to thereby induce eddy currents in the sheet material.

Abstract: The invention relates to a heat pipe or cold pipe for cryotechnology, with a casing pipe and with a chamber encapsulated hermetically by a condensation element at one pipe end and by an evaporation element at the other pipe end and filled with a heat transfer medium suitable for cryogenics. So that superconductive elements or components can be cooled to the required transition temperature with high operating reliability and efficiency in a short cooling time, in the chamber, between the condensation element and the evaporation element, at least one cooling module is installed which partially bears with a tubular surface area against the inner surface of the casing pipe and which is provided at least on the condensation element side with a conducting means in order to guide condensed and/or liquid heat transfer medium to the surface area. The invention also relates to a cooling device having a plurality of cold pipes.

Abstract: An induction heater for heating metallic billets with a yoke of E-shaped cross-section, on the middle limb of which a superconducting coil is seated, has a well located between the middle limb and each one of the respective two outer limbs. A billet can be heated by being rotated in each one of the two wells.

Abstract: During induction heating of a billet of an electrically conducting material by rotating the billet relative to a magnetic field that is generated by means of at least one direct-current-carrying superconducting winding on an iron core, the reverse-induction voltage can be reduced when a direct current is generated and maintained in the winding at a value that generates in the iron core at least in the region of the winding a magnetic flux density at which the relative permeability of the material of the iron core is less than in a zero-current state of the winding.