- Modernization of regulating and telecontrol technology for the water supply in Duisburg North
- Electromagnetic measurement of actual water transport between feed-in and high-level tank
- Virtual reference without grounding of liquid
- Background
The Stadtwerke Duisburg AG is a municipal supplier for about 250,000 households in the Rhine-Ruhr region, Germany. The company provides over 35 billion liters (9.3 billion US gal) of drinking water every year. The municipal utility services the Försterberg high level tank to ensure the supply of safe drinking water to Duisburg North. This tank functions as storage during the night to cover the fresh water requirements during the day. The drinking water is transported via a large main water line (DN 800 / 32″) and is regulated along the route between the feed-in and the high level tank by way of a booster station (DEA).
2. Measurement requirements
To manage the drinking water network and high level tank more efficiently as well as to optimize the supply of potable water, the municipal utility is investing in the electronic regulation and telecontrol of the booster station as a part of their modernization strategy. Flow measurement is a control variable in the electronic control of the booster station. To modernize the control, the supplier needed a flow measurement solution in keeping with the latest technical requirements. The solution was to enable actual in-use measurement and counting in both flow directions and feature virtual grounding. For this reason, the municipal utility made the decision to replace the previously used flowmeter with a new instrument. The old electromagnetic flowmeter, a KROHNE M960, was in commission for over 30 years