Development and multi-parametric optimization of a marine ORC evaporator design tool for cost-efficient applications
摘要
The evaporator is a critical component governing both thermal and economic performance of Organic Rankine Cycle (ORC) systems in marine waste heat recovery applications. However, systematic investigations on cost-oriented optimization of plate–shell evaporators under realistic marine operating conditions remain limited. This study develops an integrated MATLAB–REFPROP-based design and optimization tool for plate–shell ORC evaporators, explicitly incorporating manufacturing cost and pressure-drop-induced operating cost into a unified objective function. A herringbone corrugated plate evaporator for the 6S50ME-C8.2 marine diesel engine is designed and validated against published experimental data. The effects of key geometric parameters—corrugation depth, corrugation angle, plate area, and plate thickness—on total cost are systematically analyzed. Results show that the optimized design reduces total cost by 18.9%, increases the overall heat transfer coefficient by 21.7%, and decreases exergy destruction by 14.6% compared with the baseline. Model validation against published experimental data yields deviations within 5–10%, confirming predictive reliability. Sensitivity analysis identifies corrugation depth and plate thickness as the most influential parameters. The proposed framework provides a benchmark-validated tool and practical guidelines for cost-effective design of marine ORC evaporators.