Abstract:
Provided is a method for operating a fuel supply system for a marine structure. The fuel supply system includes a BOG compression unit configured to receive and compress BOG generated in a storage tank, a reliquefaction apparatus configured to receive and liquefy the BOG compressed by the BOG compression unit, a high-pressure pump configured to compress the liquefied BOG generated by the reliquefaction apparatus, and a high-pressure gasifier configured to gasify the liquefied BOG compressed by the high-pressure pump. The fuel supply system includes a recondenser installed at an upstream side of the high-pressure pump, and the recondenser recondenses a portion or all of the generated BOG by using liquefied gas supplied from the storage tank. During a ballast voyage process, all of the BOG is supplied to and recondensed by the recondenser, and an operation of the reliquefaction apparatus is interrupted.
Abstract:
Provided is a nonflammable mixed refrigerant for use in a reliquefaction apparatus of a fuel supply system that compresses BOG generated in an LNG storage tank to a medium pressure, reliquefies the compressed BOG, compresses the reliquefied BOG to a high pressure, gasifies the compressed requefied BOG, and supplies the gasified BOG to a high-pressure natural gas injection engine. A nonflammable mixed refrigerant for use in a fuel supply system for a high-pressure natural gas injection engine is provided. The nonflammable mixed refrigerant cools the BOG by heat exchange with the BOG in the reliquefaction apparatus. The nonflammable mixed refrigerant comprises a mixture of nonflammable refrigerants with different boiling points, and the boiling point of each of the nonflammable refrigerant ranges between a room temperature and a liquefaction temperature of natural gas.
Abstract:
A system for decreasing volatile organic compounds (VOC) in a crude oil tanker includes: a supply pipe horizontally installed over a crude oil storage tank of the crude oil tanker and having an end connected to a crude oil storage tank on land; a load pipe vertically connected to a bottom surface of the supply pipe, vertically passing through the crude oil storage tank of the crude oil tanker, and communicating with a lower part of the crude oil storage tank; a distribution pipe horizontally connected to a lower end of the load pipe; and a pressure control unit installed at a lower end portion of the load pipe.
Abstract:
The present invention relates to a culture medium for the fetus-derived mesenchymal stem cells in amniotic fluid. More particularly, the present invention relates to a composition for improving skin conditions, comprising the culture medium of fetus-derived mesenchymal stem cells in amniotic fluid as an active ingredient, in which the skin conditions to be improved include whitening, wrinkles, skin damages caused by UV rays or skin lifting. Further, the present invention relates to a method for preparing the composition, comprising the steps of culturing the fetus-derived mesenchymal stem cells in amniotic fluid; and collecting the culture medium.
Abstract:
The present disclosure relates to a roll-suppression device for an offshore structure. The device includes a damping plate separated downward from a hull to be placed below a bottom of the offshore structure by a connection unit, so that the width of the damping plate may be effectively enlarged without occurrence of collision during shuttle docking or ship-to-ship operation. Accordingly, the device may maximize roll-suppression, as compared with a bilge-keel or a step, and a detachable design of the device facilitates ship construction or shore operation inside a drydock.
Abstract:
Disclosed is a liquefied natural gas composition. The composition contains methane, ethane and propane and butane. The composition contains a substantial amount of butane while being substantially free of hydrocarbon molecules larger than butane.
Abstract:
Disclosed is a floating system. The floating system comprises a floating body, a first propeller and a second propeller. The first propeller is pivotally secured to the floating body. The second propeller is pivotally secured to the floating body and distanced from the first propeller in a first direction and in a second direction perpendicular to the first direction. The first and second directions are generally parallel to a surface of water on which the floating system floats.
Abstract:
Disclosed is a liquefied natural gas composition. The composition contains methane, ethane and propane and butane. The composition contains a substantial amount of butane while being substantially free of hydrocarbon molecules larger than butane.
Abstract:
A fuel gas supply system of a vessel, such as an LNG carrier, is provided for supplying fuel gas to a high-pressure gas injection engine of an LNG carrier, wherein LNG is extracted from an LNG storage tank of the LNG carrier, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. In one embodiment, the system is operated to supply fuel to an MEGI engine.
Abstract:
A fuel gas supply system of a ship is provided for supplying fuel gas to a high-pressure gas injection engine of the ship, wherein the ship has an LNG fuel tank for storing LNG as fuel and LNG is extracted from an LNG fuel tank of the ship, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine.