Optimal Heterogeneous Energy Storage Management for Multienergy Cruise Ships

Current cruise ships need to accommodate thousands of tourists for weeks' navigation, thus resulting in a large amount of thermal and electric power demands, simultaneously. To satisfy those great power demands and improve the energy efficiency, heterogeneous energy storage (HES), including both the battery and the thermal storage tank, is integrated and makes the future cruise ship as a moving multienergy microgrid. Compared with the conventional commercial ships, cruise ships have much stricter quality of service requirements of thermal load demand to satisfy the comfort levels of tourists, i.e., indoor temperature and hot water supply. In this sense, a two-stage thermal-electric HES operation method is developed, where the first stage for the hourly electric load and the second stage for the 20-minute thermal load. The case study on a real-world cruise ship voyage shows that the HES operation on multienergy cruise ships can achieve remarkable energy efficiency improvement.