Abstract
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 NO x, emission is bypassed and a relatively high level of NO x is emitted. Improving the effectiveness of a power plant by using backup fuel involves increased cost for backup fuel and higher NO x emission. The object of this paper is to improve the effectiveness of a power plant with a minimum of backup fuel and NO x emissions. The study shows how the application of appropriate reserve capacity (active redundancy) and a suitable repair policy can minimize the use of backup fuel and NO x emissions, and, at the same time, improve the effectiveness of integrated gasification combined cycle power plants.
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