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In the German city of Herten, in the Ruhr region, a waste-to-energy plant is about to supplement its electricity and heat production with a steam turbine by MAN Diesel & Turbo. The operator of the plant, Abfallentsorgungsgesellschaft Ruhrgebiet [Ruhr Waste Disposal Company], has ordered the MAN turbine of the MARC series to raise its output of both district heating and electric power.
The climate-friendly expansion of regional supplies will provide additional heating energy for around 25,000 households in the district heating network of the Ruhr region, which is also currently being expanded. In total, six combustion lines in Herten generate high-energy steam, converted by steam turbines and generators to electrical power and district heating. In the cooler months of the year, the focus is on decoupling district heating as heat energy; in the summer the emphasis is on power generation.
For this decentralized form of power generation, various fuels are used. In addition to waste, this is also biomass or the waste heat from industrial processes." He adds: "In the medium term, we foresee a trend toward such plants in the small to medium output range, and not just in Germany. Besides the pure efficiency, flexibility is a deciding factor, allowing the operator to respond to Oberhausen, fluctuating supply and demand requirements. While the requirements for the plant in Herten vary seasonally, the requirements of the energy market as a whole are increasing, in part due to the fluctuating supply from renewable sources. Here, efficient, flexible and reliable solutions are needed" Kube explains.