Two algorithms were used for optimisation: a Matlab function
fminbnd, which uses the Golden section search method and the
Parabolic interpolation method [9], was used to optimise the superheater
approach. AGA (genetic algorithm) [11]was used to optimise
the working fluid and boiler pressure, and in each individual
simulation in the GA optimisation, the superheater approach was
optimised. The upper limit for the boiler pressurewas set to 120 bar.
In principle, the GA would be able also to optimise the superheater
approach, but the mentioned approach was found to be faster.
Table 1 presents the parameters used for the GA optimisation.