KOREA INSTITUTE OF OCEAN SCIENCE & TECHNOLOGY

Proposed is an underwater drift tracking system based on a maritime positioning platform. The underwater drift tracking system may include a plurality of underwater drifting objects configured to transmit sound wave signals including their own water depth information by using sound wave communication while drifting underwater. The underwater drift tracking system may also include a maritime drift tracker configured to track real-time underwater locations of the underwater drifting objects by moving on the sea under its own power, receiving the transmitted sound wave signals from the plurality of underwater drifting objects, and calculating absolute location information of the plurality of underwater drifting objects using the received sound wave signals.

Provided is an offshore platform allowing carbon neutral fuel to be produced, stored and supplied, overcoming intermittency of renewable energy, the offshore platform comprising: a main body located offshore; a hydrogen production unit for producing hydrogen via sea water electrolysis using a water electrolysis device and storing the hydrogen; an ammonia production unit, disposed in the main body, for synthesizing, via a first synthesis device, the hydrogen flowing in from the hydrogen production unit with nitrogen in the air to produce ammonia and storing same; a carbon dioxide storage unit, disposed in the main body, for storing carbon dioxide flowing in from the ship; and a methanol production unit, disposed in the main body, for synthesizing, by means of a second synthesis device, the carbon dioxide flowing in from the carbon dioxide storage unit and hydrogen flowing in from the hydrogen production unit to produce methanol and storing same.

Provided is a method for establishing a monitoring network in a ship using magnetic-field communication. At least one sensor installed in each of a plurality of compartments senses an environment and a state within the corresponding compartment and generates a signal including sensing data. A multi-access access point (AP) installed in each compartment receives a signal generated from a sensor installed in the same compartment. A plurality of multi-access APs respectively installed in the compartments mutually transmit and receive signals using a magnetic-field communication scheme. At least one of the plurality of multi-access APs is connected to a central monitoring system of the ship through a wired network. The central monitoring system analyzes data from all of the sensors installed in the ship and monitors a state of the ship in real time.

A penetration roller for a cone penetration test device having a structure for assessing a replacement time and preventing a slip includes a frame seated on a seabed surface, a support body coupled to the frame, and a pair of first and second penetration rollers provided inside the support body so as to be rotated by a driving member provided on the support body in a direction such that same engage with each other, and having anti-slip protrusions so as to pressurize both sides of the outer peripheral surface of a rod having a cone probe coupled to an end thereof. When the rod is pressurized and moved by the first and second penetration rollers, the anti-slip protrusions form stamping grooves, thereby preventing a slip, and it can be determined whether to replace the first and second penetration rollers, on the basis of the depth of the stamping grooves.

A variable-capacity electric propulsion motor cooling structure according to the present invention is a structure for cooling a variable-capacity electric propulsion motor comprising: a rotor shaft; a rotor core having the shape of a circular plate such that the rotor shaft is coupled through the center thereof, multiple permanent magnets buried along the circumferential direction of the rotor core; a winding coil disposed so as to surround the outer periphery of the rotor core; a stator core disposed so as to surround the outer periphery of the winding coil so as to undergo a magnetic force reaction with the permanent magnets; a motor housing disposed so as to surround the outer periphery of the stator core in a hollow cylinder shape, both sides of the motor housing being open; and a pair of covers coupled to both open sides of the motor housing, respectively, such that the rotor shaft is coupled through the center of each cover, a containing space being formed inside each cover. Multiple cooling holes are formed at a predetermined interval along the circumferential direction through both surfaces of the stator core positioned in the same direction as the axial direction of the rotor shaft. Cooling tubes are coupled to the multiple cooling holes, respectively. Cooling water introduced through one of the pair of covers is discharged through the other cover after passing through the cooling tubes.

Proposed are a submarine power supply system and power supply method using a seawater battery, the system having a chargeable/dischargeable battery that is arranged on the outside of a pressure hull, so as to use, as a cathode, sodium ions dissolved in seawater, and thus produce electric power, which is then used as electric power required for operating a submarine.

A system and method for multi-image-based vessel proximity situation recognition support is proposed. The system may include an unmanned surface vehicle (USV) configured to detect and track surrounding objects by monitoring surroundings using surrounding images and navigation sensors. The system may also include a remote navigation controller configured to support proximity situation recognition of the unmanned surface vehicle according to detection of the surrounding objects, wherein the unmanned surface vehicle may include an image acquisition processor, a navigation sensor, and a detector.

An offshore wind power plant designed to reduce a fatigue load of a wind turbine includes an offshore structure, a plurality of wind turbines which is installed above the offshore structure to be spaced apart from each other with a predetermined distance and is supplied with a power through wind to produce electrical energy; and a turbine controller which controls at least one of a pitch movement and a yaw movement for the plurality of wind turbines.

Provided is a buoyancy-resistant pile for subsea structure installation, the buoyancy-resistant pile including: a pile main body having one end buried in a seabed or a concrete foundation and having a hollow portion provided therein; and a pull-out resistor coupled to pass through a side surface of the pile main body and buried in the seabed or the concrete foundation.

Proposed is a ship cogeneration system using waste heat of an LNG engine ship recovered through an economizer. More particularly, proposed is a ship cogeneration system using waste heat of an LNG engine ship recovered through an economizer. The ship cogeneration system is configured to generate electric power by recovering waste heat generated from an LNG engine and providing high-temperature and high-pressure steam discharged from the economizer to an evaporator of an organic Rankine cycle. The ship cogeneration system is capable of removing soot generated on a contact surface between the exhaust gas of the LNG engine and the economizer by using some of the high-temperature and high-pressure steam.