Siemens Energy

A method for operating an electrolysis system (2) is provided. The method comprises an electrolyzer (6), a transformer (3), and a rectifier (4, 5), wherein the transformer (3) receives an electrical AC power from an electrical grid (104) and provides an AC power (AC) output to the rectifier (5), wherein the rectifier (5) converts the AC power output (AC) into a DC power input (P1) for the electrolyzer (6), the method further comprising i), identifying begin-of-life (BOL) parameters for an electrolyzer stack (6) based on a measurement, wherein a linear dependency between a DC voltage (Udc<bol>) and a related DC current (Idc) is determined, ii), identifying end-of-life (EOL) parameters for the electrolyzer stack (6) based on a theoretical assumption, wherein a linear dependency between a DC voltage (Udc<eol>) and the related DC current (Idc) is determined, and iii) deriving a polarization curve of an actual ageing status (M) of the electrolyzer stack based on the identified parameters (BOL, EOL), wherein the derived polarization curve is used for determining of a new DC power input (P2) based on a new AC power setpoint requested from a grid operator. Moreover, a related power supply, a controller, a computer program and a related electrolyzer system are provided.

A multipowered electrolysis facility (2) having a power balance unit (6) that receives incoming power from a power source (4) and manages electron flow (8) from the power source (4); a first electrolysis unit (10) that receives the managed electron flow (8) from the power balance unit (6), and is individually attuned and cooperatively integrated to operate at a first power range of 10-500 MW; a second electrolysis unit (12) that receives the managed electron flow (8) from the power balance unit (6), and is individually attuned and cooperatively integrated to operate at a second power range of 10-500 MW; a cooling/heating unit (20) operatively connected to the electrolysis units (10, 12) to provide coolant/heated flow from the cooling/heating unit (20) to the electrolysis units (10, 12) for efficient electrolysis within the electrolysis units (10, 12); and a fluid purification unit (30) operatively connected to the electrolysis units (10, 12) to provide purified fluid flow from the purification unit (30) to the electrolysis units (10, 12) for efficient electrolysis within the electrolysis units (10, 12), whereby the electrolysis units (10, 12) produce hydrogen (40) and oxygen (42) that each may be made use of, stored, transported, discarded or otherwise.

Method of operating an electrolysis system, control unit to control an electrolysis system, electrolysis system with such a control unit, computer program product and a computer-readable storage mediumMethod of operating an electrolysis system (2) wherein the method comprising the step of:(S100) providing a first control signal (CS1) to open switches of a switching unit (12) in order to disconnect the electrolysis system (2) from a grid 4, and(S200) providing an electrical current (I0) in order to pre-magnetise a transformer (8a, 8b) of the electrolysis system (2), wherein the electrical current is provided by a DC-source (14a, 14b).

The present invention relates to a method (100) for operating an electrolysis system (1) and an electrolysis system (1). The electrolysis system (1) has multiple electrolysis modules (8) connected to a power grid (4) via a central transformer unit (2) and multiple rectifier units (6). A source voltage provided at the central transformer unit (2) and a control variable in a control system (12) of the rectifier units (6) are monitored (S1, S2), wherein said control variable is associated with the firing angles of said rectifier units (6). When the monitored source voltage fulfils a source voltage intervention criterion and/or the monitored control variable fulfils a control variable intervention criterion, the rectifier units (6) are operated (S4) with a constant firing angle.

The invention concerns an electrolyzer (10) comprising several layers (14, 16, 18) arranged as a stack (12), a first gasket (20) being part of one of the several layers (14, 16, 18), having a base plate (22) with a recess (24), a first elastomer sealing (26) connected to the base plate (22) of the first gasket (20) in such that it frames the recess (24) of said base plate (22), a second gasket (30) being part of a further of the several layers (14, 16, 18) and having a base plate (22) with a recess (24) and a second elastomer sealing (36) connected to the base plate (22) of the second gasket (30) in such that it frames the recess (24) of said base plate (22), wherein said first elastomer sealing (26) has a larger thickness than said second elastomer sealing (36).

The invention is about an electrochemical energy conversion system (1), with electrochemical cells (2), each electrochemical cell (2) comprising a membrane electrode assembly (3) arranged between a cathodic gas diffusion layer (4) and an anodic gas diffusion layer (5) and on front sides (6) surrounded by a frame (7) and enclosed between bipolar plates (8), the electrochemical cells (2) being compressed between first and second end plates (9, 10) by means of tie rods (11), wherein a pressure unit (12) is arranged between the second end plate (10) and a third end plate (13) opposite the first end plate (9) in relation to the second end plate (10), the pressure unit (12) comprising a piston (14) that acts on the electrochemical cells (2) through an opening (15) in the second end plate (10) and the directly neighbouring bipolar plate (8), the piston (14) having an attachment (16) for different pressure profiles.

Die Erfindung betrifft einen Stromrichterturm (1) mit einer Mehrzahl von Stromrichtermodulen (3), mit einer Mehrzahl von elektrischen Verbindungsleitern (9), von denen jeweils ein Verbindungsleiter (9) je zwei der Stromrichtermodule (3) miteinander oder eines der Stromrichtermodule (3) mit einer Anschlussleitung (11) des Stromrichterturms (1) verbindet. Um Emissionen auf einfache Weise wirksam zu unterbinden, ist erfindungsgemäß vorgesehen, dass wenigstens einer der elektrischen Verbindungsleiter (9) mit einer elektromagnetischen Entstörvorrichtung (13) versehen ist.

Method of operating an electrolysis system (2) where-in the method comprising the steps of:(S100) reading in a signal (S) for a faulty stack (12),(S200) providing a control signal (CS1) in order to bypass the faulty stack (12),(S300) providing a second control signal (CS2) in order to provide a first voltage adapted to the n-1 row (6b) with the faulty stack (12), and(S400) providing a third control signal (CS3) in order to provide a second voltage adapted to the n row (6a) without the faulty stack (12).

The invention relates to an electrolysis system (1) and a corresponding method. The electrolysis system (1) comprises an electrolyzer (2) and a converter system (3) comprising a plurality of converters (4). The electrolyzer (2) is adapted to produce an energy carrier by means of the direct current electrical power input (6) from the converter system (3) at an electrolyzer operating power which is less than or equal to a maximum converter system power capacity of the converter system (3). The respective converter (4) of the converter system (3) has a converter power capacity which partially corresponds to the maximum power capacity of the converter system (3). For improving the service life of the converter system (3), the converter system (3) is adapted to operate by means of a subset of the plurality of converters (4) if the electrolyzer operating power is less than the maximum converter system power capacity.

A method of designing a support structure (1) for powder bed fusion additive manufacturing is presented, the support structure (1) comprising a triply periodic minimal surface (TPMS), wherein the method makes use of a lattice optimization algorithm (LO), with a lattice cell size (1) as an optimization variable, wherein an absolute lattice feature size (t) is chosen as a design constant, and a relative lattice feature size (t') is taken as a model function depending on a lattice volume fraction (ξ), the method further comprising adjusting a lattice volume fraction (ξ) within the optimization routine. Moreover, a support structure manufactured by a related additive manufacturing method and a related computer program are provided.