Availability analysis of integrated gasification combined cycle power plants with backup fuel and NOx reduction

Backup fuel can be utilised to improve the effectiveness (energy availability) of an integrated gasification combined cycle power plant. The gas turbine can be operated independently, also, with a backup fuel. By independent operation, the selective catalytic reduction (SCR), which is installed in the heat recovery steam generator for lower NOx, emission is bypassed and a relatively high level of NOx is emitted. Improving the effectiveness of a power plant by using backup fuel involves increased cost for backup fuel and higher NOx emission. ject of this paper is to improve the effectiveness of a power plant with a minimum of backup fuel and NOx emissions. udy shows how the application of appropriate reserve capacity (active redundancy) and a suitable repair policy can minimize the use of backup fuel and NOx emissions, and, at the same time, improve the effectiveness of integrated gasification combined cycle power plants.