Energy and Exergy Analysis A recycled heat recovery system for marine diesel engines for the simultaneous production of electricity and fresh water.

To develop environmentally friendly ships, an integrated system with the ability to generate electricity and fresh water has been proposed to restore the heat dissipation of a marine engine.The system includes a marine diesel engine, an organic Rankin cycle and a multi-impact desalination unit. The results of the modeling show that the proposed cycle is capable of producing 387.97 kW of electricity and 7.04 cubic meters per hour of fresh water. The organic Rankin cycle has a 67% share of total energy depletion, while it is 33% for the desalination plant. Also, the effect of the main design parameters, which are heat transfer oil temperature, turbine inlet pressure and pinpoint temperature difference in the evaporator on the performance of the system has been evaluated and shown.