Among the modern technologies used for decentralized heat and power generation from biomass, ORC (Organic Rankine Cycle) plants are commercially available systems for biomass utilization, which ensure good conversion efficiencies. However, there are still unsolved problems related to the lack of practical experience in the integration of ORC plants in the energy management systems of urban areas. The biomass CHP plant located in Ostfildern/Germany is a practical example for the utilization of the ORC technology for the energy supply of municipal areas. The practical experience that has been gathered since the beginning of the plant operation 2004 was used for the system performance analysis as well as for the optimization of the energetically and ecological parameters of the plant operation.