Disclosed is a marine fuel cell-based integrated heat, electricity, and cooling supply system comprising a power supply system and a waste heat recovery system; the power supply system comprises wind turbine generator sets, solar generator sets, and a fuel cell power module; the waste heat recovery system encompasses a turbine power generation module and a lithium bromide refrigeration module; the fuel cell power module is connected to both the turbine power generation module and the lithium bromide refrigeration module; the turbine power generation module is used to generate electricity using waste heat. This approach fully exploits the waste heat from the exhaust gas generated by the fuel cell power module, resulting in a high overall energy utilization rate. The self-consumption electricity and pure hydrogen fuel for the integrated energy supply system can be obtained from solar and wind energy, ensuring low carbon emissions for the entire system.

An electrical system for a marine vessel. The electrical system includes a power supply that produces an output. A powered device is electrically coupled to the power supply, where the powered device receives an incoming power from the power supply. An analysis module determines a difference between the output of the power supply and the incoming power received by the powered device. The analysis module compares the determined difference to a first threshold and generates a first signal when the determined difference exceeds the first threshold.

An electrical system for a marine vessel. The electrical system includes a power supply that produces an output. A powered device is electrically coupled to the power supply, where the powered device receives an incoming power from the power supply. An analysis module determines a difference between the output of the power supply and the incoming power received by the powered device. The analysis module compares the determined difference to a first threshold and generates a first signal when the determined difference exceeds the first threshold.

An auxiliary hull unit detachably mounted to a transom on a marine vessel, wherein the hull unit is mounted at least partially below the water line of the vessel and arranged to extend rearwards parallel to the rearward extension of hull sections adjacent to the hull unit. The hull unit comprises a rear hydrofoil system for the marine vessel; the rear hydrofoil system comprising at least one pair of foldable hydrofoils which are pivotable in a lateral direction relative to the hull unit, wherein each hydrofoil is controllable by at least one actuator for displacement of the at least one pair of foldable hydrofoils in the lateral direction of the hull unit between a stowed position and a deployed position. The hull unit can be provided with a propulsion unit.

Provided is transport equipment that uses, as fuel, hydrogen produced by reforming ammonia. Transport equipment (100) includes: an ammonia tank (1) configured to store ammonia; and a hydrogen production device (A) configured to produce hydrogen and nitrogen by reforming the ammonia, in which the hydrogen is used as fuel.

A marine vessel (10) includes: a hull (11); an electric propulsion portion (15) that propels the hull (11); a water tank portion (20) that is provided on the hull (11) and is capable of storing water in the water tank portion; a float portion (40) that is provided within the water tank portion (20) so as to be movable upward and downward; and a battery case (30) that is attached to the float portion (40) and is capable of storing a detachable portable battery (35) which becomes an electric power source of the electric propulsion portion (15) in the battery case.

Described herein are watercraft comprising a hull comprising a first hull assembly, and a second hull assembly opposite the first hull assembly and parallel to the first hull assembly; and a frame configured to couple the first hull assembly to the second hull assembly. In some embodiments, the first hull assembly comprises a first quarter hull coupled to a second quarter hull, and the second hull assembly comprises a third quarter hull coupled to a fourth quarter hull. In some embodiments, the first and third quarter hulls are substantially reflectively duplicative of the second and fourth quarter hulls. In some embodiments, the first hull assembly is substantially reflectively symmetrical to the second hull assembly. Various embodiments may further include a roof comprising one or more energy harvesting arrays thereon. The roof may be movable, in various embodiments, between a closed configuration and an open configuration.