Abstract:
A method for performing a pressure test on a tank (e.g. hydrogen tank) and a filling apparatus is disclosed. The tank is connected via a tank valve to a tank feed line which has a first valve for shutting off the tank feed line, wherein during the pressure test prior to the tank being filled through the tank feed line a flow of medium, with the first valve closed, is directed into the tank via a bypass line bridging the first valve, wherein the flow of medium is throttled in the bypass line such that a tank feed pressure acting on the tank valve rises in a controlled manner, wherein the tank valve opens particularly when the tank feed pressure exceeds the pressure prevailing in the tank.
Abstract:
A method for performing a pressure test on a tank (e.g. hydrogen tank) and a filling apparatus is disclosed. The tank is connected via a tank valve to a tank feed line which has a first valve for shutting off the tank feed line, wherein during the pressure test prior to the tank being filled through the tank feed line a flow of medium, with the first valve closed, is directed into the tank via a bypass line bridging the first valve, wherein the flow of medium is throttled in the bypass line such that a tank feed pressure acting on the tank valve rises in a controlled manner, wherein the tank valve opens particularly when the tank feed pressure exceeds the pressure prevailing in the tank.
Abstract:
A method and device for compressing a gas-phase medium, particularly hydrogen or natural gas, wherein the medium may have a water content up to total saturation with water and wherein the medium is compressed in a single or multiple stages in at least one liquid-filled chamber. The liquid(s) that is/are used are an ionic liquid that is not susceptible to attack by the water contained in the medium to be compressed and/or a liquid with low vapor pressure that is not susceptible to attack by the water contained in the medium to be compressed, and the compressed medium undergoes a water separation stage.
Abstract:
The invention relates to a filling station for a pressurized gas such as hydrogen or natural gas for refuelling a vehicle tank, wherein a storage tank (VT), a computer on the filling station side (PLC), which can open and close a discharge valve, a tank pipe between storage tank (VT) and vehicle tank to be filled and a communication connection (KV) to the vehicle are provided. In order to increase safety a vehicle-side computer for calculating the vehicle-side degree of filling (Status of Charge, SOC vehicle), and a pressure measuring device on the filling station side (F-PT) in the tank pipe are provided wherein the computer on the filling station side (PLC) calculates the initial SOC filling station from a measured value of the pressure measuring device on the filling station side (F-PT) and at least one temperature value and controls the refuelling with the information of the pressure measuring device on the filling station side (F-PT) until the target pressure or target SOC filling station or until an abort signal which comes from the vehicle-side computer (Figure).
Abstract:
A method and a device for compressing a gas-phase medium, particularly hydrogen or natural gas, in a single-stage or multistage process using at least one piston compressor, wherein the medium may have a water content up to total saturation with water. The medium to be compressed is heated before the compression at least to such point that the water is unable to condense out during the compression process, and the compressed medium undergoes a water separation process.
Abstract:
A method and device for compressing a gas-phase medium, particularly hydrogen or natural gas, wherein the medium may have a water content up to total saturation with water and wherein the medium is compressed in a single or multiple stages in at least one liquid-filled chamber. The liquid(s) that is/are used are an ionic liquid that is not susceptible to attack by the water contained in the medium to be compressed and/or a liquid with low vapor pressure that is not susceptible to attack by the water contained in the medium to be compressed, and the compressed medium undergoes a water separation stage.
Abstract:
A compressor comprising a liquid acting as piston that is displaceable in the piston compartment is described.According to the invention, a piston dummy (5) that can be displaced with the liquid (3) is arranged in the liquid.This piston dummy (5) is preferentially designed in such a manner that upon reaching the top dead centre it brings about an acceleration of the liquid (3) in the ring gap defined by said piston dummy and the piston chamber wall.
Abstract:
An arrangement for guiding a medium, preferably compressed, gaseous hydrogen, is described. The arrangement encompasses a medium line, a cooling medium return line which surrounds the medium line, and a cooling medium feed line. The cooling medium return line and the cooling medium feed line are hereby preferably arranged in direct heat contact. The arrangement can furthermore be surrounded by a jacket tube.
Abstract:
The invention relates to a compressor (1) for the compressing of gaseous medium with at least one compressor cylinder (4a; 4b; 4c; 4d; 4e) which is connected with an inlet duct (6) and with an outlet duct (7) for the medium, an operating fluid (5), in particular an ionic operating fluid, being arranged in the compressor cylinder (4a; 4b; 4c; 4d; 4e), which fluid is connected with a displacement machine (2), the displacement machine (2) being constructed as a piston machine with at least one cylinder chamber (2a; 2b; 2c; 2d; 2e) and each cylinder chamber (2a; 2b; 2c; 2d; 2e) being connected with a compressor cylinder (4a; 4b; 4c; 4d; 4e). To solve the problem of providing a compressor which guarantees a reliable operation with low structural expenditure, it is proposed according to the invention that a separation device (8) for the operating fluid (5) is associated with the outlet duct (7) of the compressor (1), the separation device (8) being connected with the inlet duct (6) of the compressor (1) for the return of the operating fluid (5).
Abstract:
A displacer unit with a valve plate body is disclosed. The displacer unit having at least one displacer space which is arranged in a cylindrical drum rotating about an axis of rotation and which can be connected to an inlet connection and an outlet connection by means of a control surface. The control surface is formed on a valve plate body which is provided with a first control opening, which is connected to the inlet connection, and with a second control opening, which is connected to the outlet connection. The first control opening and the second control opening are spaced apart radially, where the displacer space can be connected to the first control opening by a first connecting passage and to the second control opening by a second connecting passage. The connecting passages are provided with a respective mechanical face seal for sealing relative to the control openings.