Cogeneration concepts for highest operational flexibility

Industrial cogeneration customer needs are usually best met by multi-block power plants, which guarantee a continuous steam supply to production facilities. Operational flexibility and highest plant availability by using proven technology with inherent lower O&M cost were key design criteria for ALSTOM's cogeneration concepts based on GT11N2 gas turbines. As evolution of the ALSTOM reference plants. all concepts described in this paper are highly standardized and modularised, however flexibility to adapt to specific customer requirements has been maintained. The paper discusses the overall mapping of a cogeneration plant product line, the steam production versus power generation characteristic, and the operation flexibility of such concepts.