This European chemical plant produces 17 bar steam in an aftercooler. The steam is consumed at various points on the production lines. The plant includes multiple chambers for production. As a rule, the production of 17 bar steam in these chambers is not sufficient to cover the total demand. Even if the chambers are operating simultaneously, additional steam must be imported from the network. The demand for 17 bar increases abruptly to keep the chambers in a start-up condition if one or both chambers is out of service.