Abstract: A method for testing a lightning protection system in a wind turbine rotor blade is provided. The lightning protection system is contacted in the region of a rotor blade root. A measuring line having an electrically conductive tip is positioned in the interior of the rotor blade or outside on the rotor blade until the conductive tip is in contact with an element of the lightning protection system. A signal is fed via the measuring line and the signal arriving at the lightning protection system in the region of the rotor blade root is measured in order to check the mode of operation of the lightning protection system in the rotor blade.

Abstract: A method for testing a lightning protection system in a wind turbine rotor blade is provided. The lightning protection system is contacted in the region of a rotor blade root. A measuring line having an electrically conductive tip is positioned in the interior of the rotor blade or outside on the rotor blade until the conductive tip is in contact with an element of the lightning protection system. A signal is fed via the measuring line and the signal arriving at the lightning protection system in the region of the rotor blade root is measured in order to check the mode of operation of the lightning protection system in the rotor blade.

Abstract: The present invention concerns a method of optically assessing a wind power installation or a part thereof, in particular a rotor blade, including the steps: orienting a camera on to a region to be assessed, recording a photograph of the region to be assessed with the camera, detecting the position of the photographed region, and associating the ascertained position with the photographed region.

Abstract: The present invention concerns a method of optically assessing a wind power installation or a part thereof, in particular a rotor blade, including the steps: orienting a camera on to a region to be assessed, recording a photograph of the region to be assessed with the camera, detecting the position of the photographed region, and associating the ascertained position with the photographed region.

Abstract: A device for heat-treating a pourable plant product, in particular for roasting coffee beans, comprises a roasting vessel. The roasting vessel is formed by a rotor bowl and a lid device. The rotor bowl is rotated relative to the lid device about a vertical axis by means of a drive means. A hot air generator is connected to the roasting vessel via a feed channel. According to the invention, the hot air generator and the feed channel are components of the, in particular fixed, lid device.

Abstract: A roasting device for vegetable bulk material, in particular coffee beans, comprises a roasting container for roasting said vegetable bulk material. The roasting container has connected therewith a gas heating furnace for supplying heated gases to the roasting container. Further, the roasting device comprises an exhaust gas purifier connected via a gas line with the roasting container. For purifying the exhaust gas, the exhaust gas purifier comprises an oxidation bed made up of porous heat-accumulating and heat-exchanging material. Further, a heating element for heating a middle region of the oxidation bed to an oxidation and/or self-decomposition temperature, and a flow reverser for reversing the direction of flow through the oxidation bed are provided in the exhaust gas purifier.

Abstract: An apparatus for roasting vegetable bulk material, in particular coffee beam is disclosed, in which essentially all of the cooling waste air of a cooler which cools the bulk material after the roasting operation is heated to roasting-gas temperature in a heat-exchanger stage and fed to the roaster. Essentially all of the roasting waste gases are heated, in a heating stage, to an extent which is necessary for increasing the temperature of the cooling gases to the roasting-gas temperature. Since the roaster operates with a higher roasting-gas throughput than hitherto, it is possible, with comparable roasting capacity, for the roasting-gas temperature to be reduced, this resulting in a more uniform roasting result. The apparatus has reduced harmful-substance emission along with increased thermal efficiency. Also disclosed is a method of roasting and cooling bulk material by utilizing the disclosed apparatus.

Abstract: A process for the manufacture of a gas mixture containing acetylene, ethylene, methane and hydrogen by cracking a liquid hydrocarbon by means of a plurality of arcs burning under the surface of the liquid hydrocarbon and limited, in their electrical effect, by current-limiting elements, wherein the total energy acting on the system is distributed by an arrangement of the electrical components, which is responsible for the stability of the arcs, over a plurality of localized burning points, the current-limiting components being matched to the voltage so that the output of each individual arc on average does not exceed 1.2 kW.