Abstract: The invention relates to a fuel cell system, comprising: at least one fuel cell; a cooling device; at least one temperature sensor; and a control unit; wherein the cooling device comprises a coolant path for the flow of a coolant, a coolant pump, a heat releasing device, and a bypass, which can be operated by means of a bypass valve and which is parallel to the heat releasing device. A control unit is designed such that it senses the coolant outlet temperature or the coolant inlet temperature, identifies a first rising phase of the measured temperature during a start-up phase of the fuel cell system, monitors the measured temperature for a plateau after the first rising phase has been identified, identifies a second rising phase following the plateau, and, during the plateau, reduces a conveyed volumetric flow rate of the coolant in the coolant path and/or increases a current flow in the at least one fuel cell and/or reduces a cell voltage.

Abstract: The invention relates to a method for operating a fuel cell system (100) comprising at least one stack (101) when starting the fuel cell system (100), in particular when during a cold start of the fuel cell system and/or start of the fuel cell system (100) under freezing conditions, in order to bring, in particular to adjust, a coolant temperature (TCoolIn) at the entry point into the stack (101) to a desired stagnation temperature (Ts), the method comprising the following steps: predicting the stagnation temperature (Ts) of the coolant (KM) for various rotational speeds (N) of a coolant pump (31), adjusting the rotational speed (N) of the coolant pump (31) so that the stagnation temperature (Ts) is above the desired value (Ts).

Abstract: The invention relates to a method for operating a fuel cell system (1), comprising a fuel cell stack (2), which has a plurality of fuel cells and through which cooling channels extend, which are fed a coolant via a cooling circuit (3) by means of a coolant pump (4). According to the invention, in the event of a start under cold or freezing conditions the temperature of the fuel cells in the fuel cell stack (2) is measured indirectly by means of the pressure difference (?p) of the coolant across the fuel cell stack (2) and the rotational speed (n) of the coolant pump (4) is controlled in accordance with the indirectly measured temperature. The invention also relates to a control device for a fuel cell system (1).

Abstract: The present invention relates to a fuel cell system (100) for providing electrical energy. The fuel cell system (100) comprises a blower (101) for conveying anode gas, a movement sensor (103) for detecting measurements of a movement of a paddle wheel of the blower (101), and a controller (105). The controller (105) is configured to assign a state of a composition of matter in an anode circuit of the fuel cell system (100) to measured values of the blower (101) detected by the motion sensor (103) in a speed range between a start speed and a predetermined target speed using a predetermined assignment scheme, and to adjust the fuel cell system (100) depending on the assigned state.

Abstract: The invention relates to a method for controlling a drying process of a fuel cell system (100), in particular during shutdown of the fuel cell system (100), preferably in preparation for a start, in particular a cold start, of the fuel cell system (100), said method comprising the following steps: initiating a drying process of the fuel cell system (100), setting at least one operating parameter (i, ii, iii) in at least one functional system (1, 2, 3, 4) of the fuel cell system (100) to a constant level, monitoring at least one outlet temperature (TCathOut, TAnodOut) from a stack (101) of the fuel cell system (100) in at least one functional system (1, 2, 3, 4) of the fuel cell system (100), evaluating the at least one outlet temperature (TCathOut, TAnodOut), determining a termination time (tdryEnd) for ending the drying operation in accordance with the evaluation.

Abstract: The invention relates to a method for keeping free of ice or thawing at least one surface (1) which is at risk of icing of a tank interface (2), wherein the at least one surface (1) at risk of icing is formed on a refueling nozzle (3) and/or on a tank filler neck (4) of a vehicle which can be operated with hydrogen. According to the invention, the at least one surface (1) at risk of icing is heated during a refueling operation and/or after a refueling operation. The invention further relates to a tank interface (2) and to a vehicle, which can be operated with hydrogen, having a tank interface (2) according to the invention.

Abstract: The invention relates to a method for operating a fuel cell system in which at least one fuel cell (1) is supplied with hydrogen via an anode path (2) and with oxygen via a cathode path, and in which anode exhaust gas exiting the fuel cell (1) is recirculated via a recirculation path (3), wherein steam contained in the anode exhaust gas is adsorbed by means of a zeolite container (4). According to the invention, the following steps are carried out in order to regenerate the zeolite container (4): a) separating the zeolite container (4) from the recirculation path (3) by closing at least one shut-off valve (5, 6) and/or switching a directional control valve (7), b) heating the zeolite container (4) by means of an electric heating device (8) such that previously adsorbed water is desorbed, and c) removing the desorbed water from the system by switching the directional control valve (7) again and/or by opening at least one flushing valve (9, 10).

Abstract: The invention relates to a method of handling food products, in which at least one respective product is placed onto a carrier that has a base and a tab pivotable relative to the base about a kink line, the carrier together with the product disposed thereon is fed to a pick-up region that is disposed in a working region of a transfer device, and the carrier together with the product disposed thereon is picked up by the transfer device, is then fed by means of the transfer device to an insertion region of a packaging machine, and is inserted there with a downward movement of the transfer device into a package component, wherein the carrier is moved past a folding contour, which is arranged in the insertion region, during the downward movement and in so doing, on the one hand, the tab is pivoted relative to the base by cooperation with the folding contour and, on the other hand, the carrier is secured against lifting by a holding device of the transfer device that is effective at or in the region of the kink li

Abstract: In order to achieve an increase in energy efficiency and a faster quenching of the workpieces, a device according to the invention is proposed for the treatment of metallic workpieces with cooling gas, comprising a horizontally arranged cylindrical housing (1) with at least one closable opening for the introduction and extraction of the workpieces to be treated, with a quenching chamber (2) located inside the housing (1) for receiving the workpieces to be treated, with two high-performance fans (5 and 6) arranged laterally and outside the quenching chamber (2) for guiding a cooling gas through the quenching chamber (2) and with two heat exchangers (11 and 12) for cooling the cooling gas, that heat exchanger (11 or 12) is respectively associated with a high-performance fan (5 or 6) and that closable guide devices (17 or 18) are arranged above and below the quenching chamber (2).

Abstract: In order to achieve an increase in energy efficiency and a faster quenching of the workpieces, a device according to the invention is proposed for the treatment of metallic workpieces with cooling gas, comprising a horizontally arranged cylindrical housing (1) with at least one closable opening for the introduction and extraction of the workpieces to be treated, with a quenching chamber (2) located inside the housing (1) for receiving the workpieces to be treated, with two high-performance fans (5 and 6) arranged laterally and outside the quenching chamber (2) for guiding a cooling gas through the quenching chamber (2) and with two heat exchangers (11 and 12) for cooling the cooling gas, that heat exchanger (11 or 12) is respectively associated with a high-performance fan (5 or 6) and that closable guide devices (17 or 18) are arranged above and below the quenching chamber (2).

Abstract: An engine exhaust gas purification device comprising control unit having successively arranged switching device (1), counter-current heat exchanger (3) and at least one exhaust gas purification component (2). The switching device (1) has a first position where a flow path (6) of the exhaust gas to the exhaust gas purification component (2) is opened and a second position where a flow path (6) of the exhaust gas to the exhaust gas purification component (2) is blocked and the exhaust gas flows along a further flow path (7) where the exhaust gas is heated and conveyed, via a flow path (20) of the exhaust gas purification component (2), and exits the exhaust gas purification unit (5) through outlet channels (4) of the counter-current heat exchanger (3). The switching device, the exhaust gas purification component, the counter-current heat exchanger and the flow paths are integrated in a compact exhaust gas treatment unit.

Abstract: An engine exhaust gas purification device comprising control unit having successively arranged switching device (1), counter-current heat exchanger (3) and at least one exhaust gas purification component (2). The switching device (1) has a first position where a flow path (6) of the exhaust gas to the exhaust gas purification component (2) is opened and a second position where a flow path (6) of the exhaust gas to the exhaust gas purification component (2) is blocked and the exhaust gas flows along a further flow path (7) where the exhaust gas is heated and conveyed, via a flow path (20) of the exhaust gas purification component (2), and exits the exhaust gas purification unit (5) through outlet channels (4) of the counter-current heat exchanger (3). The switching device, the exhaust gas purification component, the counter-current heat exchanger and the flow paths are integrated in a compact exhaust gas treatment unit.