In a Stirling cycle a huge amount of energy is wasted due to the losses. This wasted energy may be utilised as a heat source
for the boiler of an organic Rankine cycle (ORC). Combination of these two cycles leads to an increased cycle efficiency
compared to a single Stirling cycle and the analysis and optimisation of the integrated system is carried out. Optimisation
is performed using the genetic algorithm and considering three decision variables: the temperature of the cold tank of the
Stirling cycle, the pressure ratio and the temperature of the ORC condenser. In optimisation, the efficiency is considered as
the objective function and the highest value is achieved by adjusting the decision variables. Using this method, the efficiency
of the overall combined cycle was improved in which the highest efficiency was obtained to be 41.5%.
