12.1.3   Load cycling


The amount of load cycling that a turbine is expected to carry out (i.e., defined as cycling between 50% and 100% load) needs to be controlled.

In addition to specifying the number of load-following cycles required during the life of the plant, the time taken to carry out load changes should be such as to minimise cyclic thermal stress. This means avoiding rapid cooling or heating of the turbine when inlet steam throttling is applied or removed to achieve the desired load change.


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