The present invention includes an underwater vehicle power unit and method of operating the same comprising: a fuel and waste stack comprising one or more reactant or fuel storage bladders and one or more waste storage bladders that are volumetrically and gravitationally balanced during operation; a fuel reactor that generates hydrogen; a fuel cell capable of generating an electrical current when exposed to hydrogen; and a controller that controls the flow of fuel into the hydrogen generator, the flow of hydrogen into the fuel cell and the flow of waste from the hydrogen generator, and/or the fuel cell into the one or more waste storage bladders.

A solar-powered boat comprising a hull which comprises a bottom panel and side panels extending upwardly from opposed sides of the bottom panel for defining a hull interior region. At least one of the side panels comprises an upper section angled inwardly with respect to an axis orthogonal to the bottom panel; and at least one panel opening provided in the upper section. The solar-powered boat is further comprised of at least one solar panel configured to supply electricity to the boat, the solar panel being mounted within the panel opening using a solar panel mounting kit.

A power generation sailing ship has a sail provided on a deck, a water turbine connected to a front end of a shaft passing through a bow part outer hull and extending forward, a power generator disposed in a front body of the sailing ship and connected to a rear end of the shaft, and an energy storage device for directly storing electric energy generated by the power generator or converting the electric energy into energy of a substance and storing the substance.

An in-water refueling system for unmanned undersea vehicles with fuel cell propulsion. The in-water refueling system may store a liquid such as water at constant pressure and may dispense gases such as hydrogen or oxygen for refueling. In its basic configuration, the in-water refueling system may comprise a tank with an interior space for storing the liquid; a pump for regulating the flow of liquid into the interior space of the tank; an electrolysis stack assembly for converting the liquid into one or more gases; and open-bottom cylinders for storing and dispensing the gases. Each open-bottom cylinder may comprise a float sensor for determining the amount of fluids entering its cylindrical space. The in-water refueling system may further comprise a controller for regulating a temperature and a fluid pressure in the tank. Dispense lines and valves may be utilized to release the gases from the tank.

The present invention includes an underwater vehicle power unit and method of operating the same comprising: a fuel and waste stack comprising one or more reactant or fuel storage bladders and one or more waste storage bladders; a heater; a reactor that generates hydrogen and waste; a hydrogen and waste separator; a back-pressure regulator; a hydrogen and liquid separator; a fuel cell; and a controller that controls the temperature of the heater, the flow of fuel into the reactor, the flow of hydrogen into the fuel cell, the flow of water that dilutes the fuel, the flow of waste from the reactor and/or the fuel cell into the one or more waste storage bladders.

A device for reducing hydrodynamic drag of a vessel including a hull; a fuel cell, and a system of conveyance of a first amount of air discharged by the fuel cell to at least one system of injection included by the hull, the system of injection being configured to inject the first amount of air opposite a surface of the hull intended to be immersed.

Disclosed are an energy self-contained oceanic drone for AI-based marine information survey and surveillance and a method using the same. A method of monitoring, by a marine vessel system, an ocean condition may include taking in a given amount of seawater or fresh water, performing advanced water treatment on the taken-in seawater or fresh water, performing water electrolysis treatment on the water obtained through the advanced water treatment, generating electric energy using a fuel cell based on hydrogen obtained from the water through the water electrolysis treatment, and supplying the generated electric energy as electric power for the marine vessel system.

A watercraft includes at least one high-temperature superconducting coil and a cooling system for cooling the high-temperature superconducting coil to a cryogenic operating temperature, wherein the cooling system has a first cryostat tank, which surrounds the high-temperature superconducting coil and is designed to hold a liquid phase of a cryogenic coolant; wherein the watercraft also has a load, which is designed to convert an operating medium in the form of a fuel and/or in the form of a material promoting combustion; wherein at least one first material component of the operating medium is formed by the cryogenic coolant; and wherein the first cryostat tank is designed to hold a major part of the required total amount of the first material component of the operating medium for the operation of the load. A method operates a watercraft of this type.

An air supply apparatus for a ship is described. The air supply apparatus includes a fuel cell and an air lubrication device for resistance reduction of the ship. An exhaust gas outlet of the fuel cell is connected with the air lubrication device via an exhaust gas line for supplying exhaust gas to the air lubrication device. Further, a ship comprising an air supply apparatus according to any embodiments described herein as well as a method of supplying air to an air lubrication device of a ship are described.

A power generation sailing ship has a sail provided on a deck, a water turbine connected to a front end of a shaft passing through a bow part outer hull and extending forward, a power generator disposed in a front body of the sailing ship and connected to a rear end of the shaft, and an energy storage device for directly storing electric energy generated by the power generator or converting the electric energy into energy of a substance and storing the substance.