Abstract
This study aims to investigate the performance characteristics of the 100 kW Organic Rankine Cycle (ORC) using ship waste heat. The heat source of ORC was steam generated by economizer, and the heat sink was seawater. Three cycles including the basic cycle, preheating cycle, and I.H.X (Internal heat exchanger) cycle were investigated. The results show that applying I.H.X can increase the efficiency of the cycle, and applying preheater can reduce the required mass flow rate of steam which is the heat source. Furthermore, it is recommended to lower the evaporation temperature and enhance the superheating degree to reduce the high expansion ratio, without system efficiencies decreased.
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