An air supply system applicable to an air layer drag reduction ship includes an air tank and a cooling assembly. The air tank is provided with an air outlet pipeline and multiple air inlet pipelines. The air outlet pipeline and the air inlet pipelines are each provided with a first monitoring assembly and a first remote control valve. The cooling assembly is disposed inside the air tank and includes a liquid inlet pipe and a liquid outlet pipe, where the liquid outlet pipe is provided with a second monitoring assembly, the liquid inlet pipe is provided with a second remote control valve, and the second monitoring assembly and the first monitoring assembly are communicatively connected to the second remote control valve. The air supply system is capable of supplying stable and low-temperature air.

The present disclosure relates to a natural gas hydrate tank container loading system for transporting natural gas hydrate, and the present disclosure provides a natural gas hydrate tank container loading system, enabling self-powered power generation and boil-off (BOG) gas treatment, includes: a refrigerator for inhibiting the generation of boil-off gas which naturally generates in a natural gas hydrate tank container during transportation; and a solar cell, a battery, and a generator, which operates by means of the boil-off gas, for supplying electric power to the refrigerator, thereby ensuring a generation capacity sufficient to operate the refrigerator by means of the solar cell, the generator, and the battery, and thus always maintaining a stable phase equilibrium (self-preservation) in the natural gas hydrate tank container even during long-distance transportation and solving problems of fire, environmental pollution, or the like which occur when the boil-off gas (BOG) is discharged to the outside.

The present disclosure relates to a natural gas hydrate tank container loading system for transporting natural gas hydrate, and the present disclosure provides a natural gas hydrate tank container loading system, enabling self-powered power generation and boil-off (BOG) gas treatment, includes: a refrigerator for inhibiting the generation of boil-off gas which naturally generates in a natural gas hydrate tank container during transportation; and a solar cell, a battery, and a generator, which operates by means of the boil-off gas, for supplying electric power to the refrigerator, thereby ensuring a generation capacity sufficient to operate the refrigerator by means of the solar cell, the generator, and the battery, and thus always maintaining a stable phase equilibrium (self-preservation) in the natural gas hydrate tank container even during long-distance transportation and solving problems of fire, environmental pollution, or the like which occur when the boil-off gas (BOG) is discharged to the outside.

A heat exchange system for use on an engine-powered watercraft includes a liquid cooling system for cooling the engine using a first heat exchanger and a water heating system using a second heat exchanger for heating water. Raw water from an external water source is passed through each heat exchanger. Water used to cool the engine coolant inside the first heat exchanger exits the watercraft. Water heated by the second heat exchanger is passed to either an intake conduit or at least one onboard accessory system for flushing thereof to kill aquatic invasive species. A valve inside the second heat exchanger opens to release heated water when the heated water reaches a temperature of at least 140 F. Heated coolant from the first heat exchanger passes through the second heat exchanger to transfer heat to the water inside the second heat exchanger.

A heat exchange system for use on an engine-powered watercraft includes a liquid cooling system for cooling the engine using a first heat exchanger and a water heating system using a second heat exchanger for heating water. Raw water from an external water source is passed through each heat exchanger. Water used to cool the engine coolant inside the first heat exchanger exits the watercraft. Water heated by the second heat exchanger is passed to either an intake conduit or at least one onboard accessory system for flushing thereof to kill aquatic invasive species. A valve inside the second heat exchanger opens to release heated water when the heated water reaches a temperature of at least 140 F. Heated coolant from the first heat exchanger passes through the second heat exchanger to transfer heat to the water inside the second heat exchanger.

A cooling apparatus (1) for cooling a fluid by means of surface water, the cooling apparatus comprising at least one tube (8) for containing and transporting the fluid in its interior, the exterior of the tube (8) being in operation at least partially submerged in the surface water so as to cool the tube (8) to thereby also cool the fluid, characterized in that the cooling apparatus is adapted to receive at least one light source (9) for producing light that hinders fouling, wherein, after the cooling apparatus has received the light source, the at least one light source (9) is dimensioned and positioned with respect to the tube (8) so as to cast anti-fouling light over the tubes' (8) exterior.

A cooling apparatus (1) for cooling a fluid by means of surface water, the cooling apparatus comprising at least one tube (8) for containing and transporting the fluid in its interior, the exterior of the tube (8) being in operation at least partially submerged in the surface water so as to cool the tube (8) to thereby also cool the fluid, characterized in that the cooling apparatus is adapted to receive at least one light source (9) for producing light that hinders fouling, wherein, after the cooling apparatus has received the light source, the at least one light source (9) is dimensioned and positioned with respect to the tube (8) so as to cast anti-fouling light over the tubes' (8) exterior.

A cooling apparatus for cooling a fluid by surface water includes more than one tubes for containing and transporting the fluid in its interior, the exterior of the tube being in operation at least partially submerged in the surface water so as to cool the tube to thereby also cool the fluid. The cooling apparatus also includes at least one light source for producing light that hinders fouling on at least part of the submerged exterior, and at least one optic unit for enhancing the distribution of anti-fouling light on the submerged exterior.

A cooling apparatus for cooling a fluid by surface water includes more than one tubes for containing and transporting the fluid in its interior, the exterior of the tube being in operation at least partially submerged in the surface water so as to cool the tube to thereby also cool the fluid. The cooling apparatus also includes at least one light source for producing light that hinders fouling on at least part of the submerged exterior, and at least one optic unit for enhancing the distribution of anti-fouling light on the submerged exterior.

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.