Modeling and operational analysis of ship integrated energy system considering partial-load characteristics of equipment and transferable loads

Abstract

The rapid development of the shipping industry has brought serious energy consumption and environmental pollution issues. Efficient management of the Ship Integrated Energy System (S-IES) has become a critical necessity to promote the sustainable development of the shipping industry. Compared to onshore system, S-IES faces more complex and unstable equipment conditions and load demands, requiring more flexible and reliable system operational strategy. Energy Hub (EH) is an effective and versatile modeling method. In this study, a dynamic EH model considering partial-load characteristics of equipment and transferable loads is established. Using a cruise ship as an application case, the load scheduling schemes for different seasons are analyzed, and the results for three scenarios in each season are compared to validate the model's effectiveness. The results show that accounting for the partial-load characteristics of equipment enhances the accuracy of the system model. Introducing transferable loads improves the operational performance of the system. Compared to the scenarios considering only the partial-load characteristics of equipment, the scenarios that also include transferable loads reduce daily operating costs by 1.61 %, 1.03 %, and 2.05 %, and relatively increase the primary energy utilization rates by 1.87 %, 0.91 %, and 2.16 % in summer, mid-season, and winter, respectively.