This paper presents a feasibility study of a modular multi-purpose frigate with an integrated power and energy system (IPES) and a Combined Diesel Electric and Gas (CODLAG) propulsion system. The modular design offers greater flexibility, enabling the vessel to perform a wider range of missions thanks to innovative hull form and a large capacity for carrying a containerized payload. The study evaluates also the feasibility and potential benefits of two possible configurations for the Energy Storage System (ESS) integration in the onboard IPES, enabled by the specific ship design. The utilization of peak shaving technology reliying on supercapacitors has a limited impact on the ship in terms of weight and volume, thus being the most appropriate solution for CODLAG frigates. Conversely, Li-ion batteries can enable zero-emission mode. A large ESS capacity can be integrated onboard in the available weight and volume margins (enabled by the specific ship design), aimed at improving energy efficiency in port, manoeuver, and combat modes (by avoiding non-optimal load rates on generators).
