In the past, thermal power plants, in particular coal-fired ones, experienced great improvements. Major gains in efficiency have been achieved by the increase of the steam parameters and a lowering of the condenser pressure. Further thermodynamic potentials can be exploited by cogeneration of heat and power. Nowadays conventional power plants are sophisticated technology, but the growing intermittency of renewable energy sources requires a more and more flexible operation. Industrial power plants thereby face additional challenges. They have to ensure the supply of contract based process steam or heat as well as to respond to the grid by electricity generation. This results in frequent partial-load operation. For the evaluation of such off-design behavior, a detailed steady-state model has been created in EBSILON~R Professional. It covers a generic coal-pulverized power plant with a customizable steam generator which considers different fuel compositions, the combustion chamber geometry, heat exchanger properties and even-pressure gradient operation. The flue gas cleaning includes an electrostatic precipitator, a desulfurization plant and an optional post-combustion carbon capture. On the demand side, the turbo sets, a traction current and process steam offtake at two pressure levels can be parameterized. A parametric study has been carried out for different operation scenarios with and without CO2 scrubbing. The results illustrate efficiency penalties and provide common (specific) characteristics of the process for associated analyses.
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