The gas compressor station in Scharenstetten near Ulm compresses gas to the pressure it needs to travel long distances. The station thus ensures that gas can be transported from Ulm to the state capital Stuttgart and to Lake Constance, to the Principality of Liechtenstein and Vorarlberg.
By using state-of-the-art gas turbine technology, the compressor station performance is improved by 60 % in total. In addition to this, the emissions produced are significantly under statutory limits.
Since 1988, the gas compressor station has been an important nodal point in the terranets bw transmission system, which significantly contributes to a secure supply of energy. In the spring of 2017, the station was extended by a fourth compression unit.
In the middle of March 2020, work began on replacing two existing compression units with modern, more powerful machine units. In summer, installation of the first of the two modern compression units took place. The necessary integration work could be completed in spring 2021. Subsequently, installation of the second new compression unit began. Commissioning could be completed in spring 2022. Both new machine units are now ready for transporting gas.
Travelling through underground pipelines, gas reaches the compressor station with a pressure of 40 bar. Firstly, dust and moisture are filtered out. And then the gas is passed into the compressor and there brought to the required pressure. A turbine or electric engine supplies the energy needed for the compression process.
During compression, the gas heats up to 70 °C and is therefore fed through gas coolers that cool it back down to operating temperature. The gas is then fed through a measuring section before being injected back into the transmission system of terranets bw with a pressure of 80 bar.
Development measures require public-law permission according to the Federal Immission Control Act (German: BImSchG). The competent approval authority is the Freiburg Regional Council. The community of Dornstadt and the Alb-Donau-Kreis district authorities were involved in the procedure. In order to achieve broad consensus with all stakeholders, terranets bw also involved the affected communities and other stakeholders at an early stage.
During the development measures, the construction site and storage areas for building equipment and materials already established will continue to be used. As the new compression units will be installed instead of two existing compression units, no additional space will be required outside the existing plant.
Replacing two existing compression units with modern, more powerful machine units will not change the appearance as the development work will take place inside the existing building. The characteristic four chimneys of the gas compressor station will remain.
In the middle of March 2020, work began to replace two existing compression units with modern, more powerful drives. In the summer of 2020, the first of the two modern compression units was installed. After completion of the necessary integration works, this unit is expected to be used for transporting gas in the spring of 2021. Subsequently, installation of the second compression unit will begin, which is expected to be completed by spring 2022.
During development measures, the construction site and storage areas for building equipment and materials outside the gas compressor station will continue to be used. Near to the construction works, increased traffic and higher noise pollution resulting from deliveries to the construction site can be expected from mid-March 2020. However, the noise pollution will not affect residential areas closest to the site.
From the end of March 2020, there is a speed limit in front of the entrance to the gas compressor station and the road "Vor dem Hochwang" between the construction site and storage areas and the gas compressor station is temporarily closed.