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Abstract
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This study presents a theoretical model for multi-objective optimization of marine diesel charge air
cooler by firefly algorithm. By considering the overall cost and exergy destruction minimization as
objective functions, energy and exergy analysis is carried out for multi-objective optimization design of a
heat exchanger. Sensitivity analysis is performed to find out the effect of design parameters on the
objective functions. Firefly algorithm is used to generate a set of Pareto optimum points and a normalized
form of the Pareto front is applied as a decision-making approach to finding out optimum solutions. The
theoretical model in the present study is verified by an experimental data and shows a good agreement
between the current results and the experimental data. Also, the Pareto front shows that irreversible
losses decrease while total cost increases and vice versa. Multi-objective optimization results reveal that
overall cost and exergy destructions are reduced by 4.03% and 7.66%, respectively.Water pressure drop is
decreased by 12.41% and air pressure drop is reduced by 2.95%.
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