{"id":13198,"date":"2022-08-10T08:52:05","date_gmt":"2022-08-10T06:52:05","guid":{"rendered":"https:\/\/blog.wika.com\/en\/?p=13198"},"modified":"2022-10-25T08:28:22","modified_gmt":"2022-10-25T06:28:22","slug":"pressure-switch-in-hydrogen-powered-train-ensures-safety","status":"publish","type":"post","link":"https:\/\/blog.wika.com\/en\/applications\/pressure-switch-in-hydrogen-powered-train-ensures-safety\/","title":{"rendered":"Pressure switch in hydrogen-powered train ensures safety"},"content":{"rendered":"

In a newly developed hydrogen train for local transport, a pressure switch from WIKA plays a crucial role. Within the scope of pressure monitoring, it performs the central safety function in the H2 supply system during the journey.<\/strong><\/p>\n

The benefits of hydrogen in rail transport are rather unknown to the general public. Even if the first trains with H2 fuel cells are already in operation. They operate on non-electrified railway lines and replace the diesel trains that were used before.<\/p>\n

Tanks based on carbon fibre composite technology<\/h2>\n

The tank capacity for the hydrogen must be adapted to the distances. One of WIKA’s customers has specialised in individual fuel storage systems for H2 vehicles. Their cylindrical tanks are based on carbon fibre composite technology. They are therefore extremely robust and yet have a relatively low weight compared to steel vessels.<\/span><\/p>\n

Tanks of this type are also installed in the hydrogen-powered train mentioned at the beginning. This multiple-unit train, designed for commuting traffic, is filled with the hydrogen at a special terminal. The tank pressure is 300 to 350 bar. While driving, it must be reduced to a single-digit value for the supply to the fuel cell. This is done via a pressure regulation unit downstream of the storage system.<\/span><\/p>\n

Pressure switch in hydrogen-powered train switches the drive system off<\/h2>\n\n
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Suitable for use in a new type of hydrogen-powered train in terms of safety – the model PXA pressure switch from WIKA.<\/span><\/p><\/div>\n \n

The pressure switch model PXA meets the requirements of the hydrogen-powered train application. With the monitoring the of tank pressure and pressure regulation in the hydrogen-powered train, the customer uses the pressure switch model PXA for the safety function. The miniature instrument switches off the H2 propulsion system in two cases, depending on the function:<\/p>\n