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Lappeenrannan-lahden Teknillinen Yliopisto Lut

Tuomo Lindh

Jero Ahola

Markku Niemelä

Rafal Jastrzebski

Alexander Smirnov

Olli Pyrhönen

Kimmo Tolsa

Vesa Ruuskanen

Joonas Koponen

Antti Kosonen

Anton Poluektov

Markku Niemela

A system for alkaline water electrolysis includes electrolysis cells, a hydrogen separator tank, a first piping from the electrolysis cells to the hydrogen separator tank, an oxygen separator tank, a second piping from the electrolysis cells to the oxygen separator tank, and a third piping for conducting liquid electrolyte from the hydrogen separator tank and from the oxygen separator tank back to the electrolysis cells. The system includes an ultrasound source for applying ultrasound on the liquid electrolyte contained by the first piping. The ultrasound enhances the separation of dissolved hydrogen gas from the liquid electrolyte contained by the first piping, and thus energy efficiency of the alkaline water electrolysis is improved. Furthermore, a safe control range of the alkaline water electrolysis is broadened because crossover of hydrogen gas to an oxygen side of the system is reduced.

System and a method for alkaline water electrolysis

The present disclosure presents a method, a sensor comprising printed circuit board (PCB), and a sensor PCB for a capacitive sensor for sensing position or motion of a shaft comprising an electrically conducting part. The method and the sensor utilize the sensor PCB that comprises a mounting hole through which the conducting part of the shaft can be mounted, at least one capacitor electrode formed to the printed circuit board, wherein an electrode surface of the electrode extends parallel to a center axis of the mounting hole and faces the center axis.

Method, sensor, and printed circuit board for sensing position or motion of a shaft

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Lappeenranta, Finland

Tuomo Lindh