Abstract: A compressor and method for compressing a working medium, including moving a drive piston which is driven by way of a driving medium within a first cylinder between a first end position and a second end position; moving a high pressure piston which compresses the working medium within a second cylinder between a first end position and a second end position; arranging a high pressure seal for sealing the high pressure piston; arranging a magazine having a receptacle for the high pressure seal and at least one replacement high pressure seal in a first operating position, in which the high pressure piston is sealed by way of the high pressure seal; and transferring the magazine from the first operating position to a second operating position, in which the high pressure piston is sealed by way of the replacement high pressure seal.

Abstract: A compressor and method for compressing a working medium, including moving a drive piston which is driven by way of a driving medium within a first cylinder between a first end position and a second end position; moving a high pressure piston which compresses the working medium within a second cylinder between a first end position and a second end position; arranging a high pressure seal for sealing the high pressure piston; arranging a magazine having a receptacle for the high pressure seal and at least one replacement high pressure seal in a first operating position, in which the high pressure piston is sealed by way of the high pressure seal; and transferring the magazine from the first operating position to a second operating position, in which the high pressure piston is sealed by way of the replacement high pressure seal.

Abstract: The invention relates to a device and a method for compressing a working medium, comprising: compressing a drive medium in a compressor; moving a drive piston within a first cylinder by means of the compressed drive medium; moving a high-pressure piston, which compresses the working medium, within a second cylinder by means of the drive piston; and transferring heat from the compressed working medium to the compressed drive medium before the compressed drive medium enters the first cylinder of the drive piston.

Abstract: The invention relates to a test apparatus and a method for testing a load change of a compressed-gas accumulator, said method comprising the steps of: i. arranging the compressed-gas accumulator to be tested inside a test container; ii. increasing the pressure of a compressed gas in the compressed-gas accumulator to a test pressure; iii. measuring the elastic deformation of the compressed-gas accumulator, which is caused by the test pressure of the compressed gas; iv. Increasing the pressure of a pressure medium in the test container such that the elastic deformation of the compressed-gas accumulator is reduced by the pressure of the pressure medium on the compressed-gas accumulator; v. lowering the pressure of the pressure medium in the test container; and vi. repeating steps iii. to v.

Abstract: A compressor and method for compressing a working medium, including moving a drive piston which is driven by way of a driving medium within a first cylinder between a first end position and a second end position; moving a high pressure piston which compresses the working medium within a second cylinder between a first end position and a second end position; arranging a high pressure seal for sealing the high pressure piston; arranging a magazine having a receptacle for the high pressure seal and at least one replacement high pressure seal in a first operating position, in which the high pressure piston is sealed by way of the high pressure seal; and transferring the magazine from the first operating position to a second operating position, in which the high pressure piston is sealed by way of the replacement high pressure seal.

Abstract: The invention relates to a device and a method for compressing a working medium, comprising: compressing a drive medium in a compressor; moving a drive piston within a first cylinder by means of the compressed drive medium; moving a high-pressure piston, which compresses the working medium, within a second cylinder by means of the drive piston; and transferring heat from the compressed working medium to the compressed drive medium before the compressed drive medium enters the first cylinder of the drive piston.

Abstract: A constant-pressure storage unit and a method for operating a constant-pressure storage unit, for storing and dispensing hydrogen under constant pressure are disclosed. The constant-pressure storage unit has at least one constant-pressure store, which is divided into two regions by a movable separating piston, at least one liquid pump for conveying a liquid, and at least one liquid store, wherein a measuring device measures the liquid level in the liquid store and sends a signal to the liquid pump by means of a control unit. In this way, the liquid pump can be stopped in time when the constant-pressure storage unit is empty.

Abstract: The invention relates to a method and to a device for determining an amount of gaseous fuel, which during a refueling process at a gas station has been transferred into a storage tank via a gas pump (3) and a filling hose (4) connected thereto, wherein in the gas pump (3) of the gas station, a flow meter (F) is provided, which during the filling of the storage tank detects the amount of fuel dispensed. Once the filling is completed, the filling hose (4) is depressurized, and the amount of fuel, which has not been transferred into the storage tank due to the depressurization, is detected, and this amount is subtracted from the amount detected by the flow meter (F).

Abstract: The invention relates to a method for separating water from a gaseous working medium (2), at least the following steps being carried out: providing an ionic hygroscopic liquid (4) in a reaction chamber (3); supplying the water-containing working medium (2) and conducting the working medium (2) through the ionic liquid (4), wherein water bonds with the ionic liquid (4) and is thereby separated from the working medium; and discharging the dried working medium (7). The invention further relates to a corresponding water separator (1) and to a water separator system (15).

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: The invention relates to a method for filling a storage tank, in particular, a vehicle tank, with a pressurized, gaseous medium, in particular hydrogen, in which each storage tank (8) is filled with said medium via a tank supply line (30) and a filling coupling (19) which is provided on one end section (30a) of the tank supply line (30). Prior to filling the storage tank (8), a cold accumulator (7) provided upstream of the filling coupling (19) on the end section (30a) of the tank supply line (30) is cooled to a predetermined operational temperature such that the medium which, in a first phase of the filling of the storage tank (8), flows through the tank supply line (30) where it is in particular warmed, is cooled by the cold accumulator (7) to a predetermined desired temperature. When the tank supply line (30) has been cooled due to the effect of the medium flowing back, said cold accumulator (7) is cooled again in a second phase of filling the storage tank (8) by a medium flowing back.

Abstract: A mobile compressed gas dispensing device, in particular a mobile hydrogen filling station, which is transported by means of a vehicle is disclosed. The device contains a drive unit, which serves to drive the vehicle, which transports the compressed gas dispensing device; at least one storage container, which is suitable for storing a compressed medium; at least one line, via which the storage container or the storage containers, respectively, can be connected to an external storage container, which is to be filled by the compressed gas dispensing device, and at least one compressor. The compressor is operatively connected to the drive unit of the vehicle in such a manner that it can be driven by said drive unit.