2nd Inspection after nearly 11,000 operating hours

After almost 11,000 operating hours in sewage gas operation, the second scheduled maintenance of the Stirling CHP unit was carried out in a municipal sewage treatment plant in Saxony in April 2017. The inspection showed that the Stirling engine is still in an impeccable condition. In addition to the usual maintenance work such as the scheduled change of seals and filters, the first oil change took place. The two cylinders with pistons were also extended for the general overhaul this time and replaced by new ones.

A further development of the manufacturer for the optimization of the combustion chamber geometry was installed as a special feature. Thanks to the simple exchange of the old mixing tube with a new version, the energy efficiency can be further increased, while at the same time reduced emissions.

In addition, with the installation of the latest MSR software, the process variables are now even more finely tuned. This leads into an increased operational stability and efficiency.

This means that there is nothing to prevent further continuous operation to save the basic loads on the sewage treatment plant. Except for some heat-related exceptions in the summer of 2016, the engine was permanently used. This ensured a continuous coverage of the partial demand for heat and electrical energy for the operator - an important positive contribution to the energy balance on a sewage treatment plant.