Abstract:
The invention relates to a composite membrane for selectively diffusing at least one predefined substance. Said membrane consists of a support layer consisting of a first material, a permeation layer consisting of a second material that is selectively permeable to at least one predefined substance and is situated on the support layer. The support layer has a support structure with channels, through which the predefined substance(s) can pass at right angles to and optionally also laterally to the plane of the permeation layer. The support layer leaves sections of the surface of the permeation layer exposed, said sections being connected to the channels.
Abstract:
A fuel cell is disclosed, comprising an anode part with an inlet and an outlet for a fuel, a cathode part with an inlet and an outlet for an oxidising agent and a membrane situated between the anode part and the cathode part. Conventionally, little flow is apparent in the rearmost section of the fuel cell, when considered in the direction of flow, such that the supply for the membrane of the fuel and the oxidising agent only occurs by diffusion. According to the invention, the resulting low power density of the fuel cell may be compensated, whereby at least one transport mechanism, for example, an injector, is provided to support the introduction and perfusion of the fuel cell with fuel and/or oxidising agent. The rearmost section of the fuel cell and the membrane can be directly reached by means of the transport mechanism.
Abstract:
The invention relates to a fuel cell system (10), comprising a fuel cell (20) and an assembly (30) for heating/cooling said fuel cell (20). The assembly (30) enables the fuel cell (20) and the streams of gas which are fed to the fuel cell (20) to be preheated and to be rapidly brought up to the ideal operating temperature, in particular, during a rapid start-up of the fuel cell system (10). A flow line (31) for a heating/cooling medium is provided for this purpose which is connected or can be connected to the fuel cell (20) in such a way that a thermal exchange occurs or can occur between the fuel cell (20) and the heating/cooling medium. At least one heat sink (35; 36) is also provided in the flow line (31) which is/can be connected to a supply line for the fuel (21) and/or a supply line for the oxidation agent (23) for the fuel cell (20) in such a way that a thermal exchange occurs/can occur between the heat sink(s) (35; 36) and the fuel and/or the oxidation agent for the fuel cell (20). The inventive assembly (30) also enables the waste heat which is generated in the fuel cell (20) to be used to heat the fuel and/or the oxidation agent. A heating device (42), configured as a burner, is also provided for the additional heating of the heating/cooling medium, for example during a cold-start of the fuel cell system (10).
Abstract:
A transfer assembly for a conveyor system includes a frame, a plurality of rollers mounted to the frame, a plurality of grooved transfer sheaves supported by the frame, and an actuator which selectively moves a group of the transfer conveyors between a retracted position and an extended position such that the transfer belt which is carried by the transfer sheaves is moved between a position below the conveying surface to a position above the conveying surface for lifting an article being conveyed on the rollers and transferring the article in a transfer direction. At least one of the transfer belt and the transfer sheaves are adapted to resist rolling of the transfer belt in the transfer sheaves when the transfer belt is subject to a lateral force from the article being transferred.
Abstract:
A belt assembly for belt turn conveyor includes a belt with a plurality of longitudinal fibers generally aligned or oriented along the curved longitudinal axis of the belt. The belt may comprise a plurality of belt segments which are interonnected to form a endless belt with each belt segment preferably including a plurality of longitudinal fibers aligned along the longitudinal axis of each respective belt segment. When interconnected, the longitudinal fibers of each belt segment generally align along the curved longitudinal axis of the belt. Alternately, the belt may be woven such that the longitudinal fibers are substantially aligned along the curved longitudinal axis of the curved belt. Thus, a belt assembly for a belt turn conveyor is provided that exhibits a more uniform stiffness along its length, which results in the belt assembly exhibiting reduced forces across its length thus increasing the belt`s capacity and longevity.
Abstract:
A fuel cell is disclosed, comprising an anode part with an inlet and an outlet for a fuel, for example, hydrogen; a cathode part with an inlet and an outlet for an oxidising agent, for example, oxygen and a membrane situated between the anode part and the cathode part. According to the invention, a limited differential pressure across the membrane between the anode and the cathode part, under all operating conditions is achieved, whereby a spring-loaded pressure regulator is arranged in the fuel outlet and a membrane-controlled pressure regulator is arranged in the oxidising agent outlet. The both pressure regulators are coupled to each other, by means of a connecting line linking the regulating chamber of the pressure regulator with a pressure chamber of the pressure regulator. The pressures in the anode part and the cathode part can thus be held the same under all working conditions.
Abstract:
The invention relates to a method for perceiving dangerous movements carried out by cranes, especially those which are controlled by a crane driver sitting in a booth, wherein an optical and/or acoustic display integrated into the controls for said crane is used. According to the invention, an on/off voice output is used as an acoustic display.