Other

Daewoo Shipbuilding & Marine Engineering Co., Ltd.

Hanwha Ocean Co., Ltd.

Doosan Heavy Industries & Construction Co., Ltd

Iljin Electric Co., Ltd.

Seung Chul Lee

Jeong Ho Park

Seon Jin Kim

Jae Woong Kim

Hyun Jun Shin

Su Kyung An

Dong Kyu Choi

Jin Ho Choi

Cheol Ho Park

Young Pil Choi

Seon Kyong Kim

Seong Yeol Yang

Hyun Woo Son

Min Seok Sung

Hye Min Jung

Yoon Kee Kim

Chul Gyu Bae

Hyang Yeon Kim

Yoon Seong Cho

Ki Duck Park

Jong Goo Kang

Seong Jong Yang

Je Young Lee

Sang Wook Kang

Disclosed herein are a fuel supply system for ships and a fuel supply method using the same. The fuel supply method includes: 1) supplying an excess amount of liquefied gas as fuel to an incompressible fluid-fueled engine (E); 2) cooling unconsumed fuel discharged from the engine (E) through heat exchange with liquefied gas discharged from a storage tank (T); 3) returning the unconsumed fuel discharged from the engine (E) and having been cooled through heat exchange in step 2) to the storage tank (T); and 4) supplying the liquefied gas discharged from the storage tank (T) and having been used as refrigerant for heat exchange in step 2) to the engine (E). The fuel supply method can prevent cavitation in the engine (E) by supplying the excess amount of liquefied gas sufficient to accommodate variation in load of the engine (E) as fuel to the engine (E).

System and method for supplying fuel for ship

Disclosed is a re-liquefying device using a boil-off gas as a cooling fluid so as to reliquefy the boil-off gas generated from a liquefied gas storage tank provided in a ship. A boil-off gas re-liquefying device for a ship comprises: a multi-stage compression unit for compressing boil-off gas generated from a liquefied gas storage tank; a heat exchanger in which the boil-off gas generated from the storage tank and the boil-off gas compressed exchange heat; a vaporizer for heat exchanging the boil-off gas cooled by the heat exchanger and a separate liquefied gas supplied to a fuel demand source of a ship, and thus cooling the boil-off gas; an intermediate cooler for cooling the boil-off gas that has been cooled by the heat exchanger; and an expansion means for branching a part of the boil-off gas, which is supplied to the intermediate cooler, and expanding the same.

Boil-off gas reliquefication apparatus and method for vessel

A ship comprises: a liquefied gas storage tank; a multi-stage compressor for compressing a boil-off gas discharged from a storage tank and comprising a plurality of compression cylinders; a second heat exchanger for heat exchanging a fluid, which has been compressed by the multi-stage compressor, and thus cooling same; a first decompressing device for expanding a flow ('flow a') partially branched from the flow (“flow a”) that has been cooled by the second heat exchanger; a third heat exchanger for heat exchanging, by “flow a” which has been expanded by the first decompressing device as a refrigerant, the remaining flow (“flow a”) of “flow a” after excluding “flow a” that has been branched and thus cooling same; and a second decompressing device for expanding “flow a” which has been cooled by the third heat exchanger.

Ship

Disclosed is a re-liquefying device using a boil-off gas as a cooling fluid so as to re-liquefy the boil-off gas generated from a liquefied gas storage tank provided in a ship. A boil-off gas re-liquefying device for a ship comprises: a multi-stage compression unit for compressing boil-off gas generated from a liquefied gas storage tank; a heat exchanger in which the boil-off gas generated from the storage tank and the boil-off gas compressed exchange heat; a vaporizer for heat exchanging the boil-off gas cooled by the heat exchanger and a separate liquefied gas supplied to a fuel demand source of a ship, and thus cooling the boil-off gas; an intermediate cooler for cooling the boil-off gas that has been cooled by the heat exchanger; and an expansion means for branching a part of the boil-off gas, which is supplied to the intermediate cooler, and expanding the same.

Boil-off gas re-liquefying device and method for ship

An apparatus for reliquefaction of boil-off gas for a vessel, comprises: a compression unit for compressing the boil-off gas discharged from the storage tank; and a heat exchanger for heat-exchanging the compressed boil-off gas compressed by the compression unit with the boil-off gas discharged from the storage tank; a first expansion means for dividing the boil-off gas passing through the heat exchanger into at least two flows including a first flow and a second flow, and expanding the divided first flow; a first intercooler for cooling the second flow remaining after the division of the first flow by using the first flow expanded by the expansion means as a refrigerant; and a receiver for receiving a second flow having passed through the first intercooler, in which a downstream pressure of the compression unit is controlled by a flow discharged from the receiver.

Apparatus and method for reliquefaction of boil-off gas of vessel

A ship comprises: a tank; a multistage compressor for compressing a boil-off gas discharged from a storage tank and comprising a plurality of compression cylinders; a first heat exchanger for heat exchanging a fluid, which has been compressed by the multistage compressor, with the boil-off gas discharged from the storage tank and thus cooling the same; a first decompressing device for expanding a flow ('flow a') partially branched from the flow ('flow a') that has been cooled by the first heat exchanger; a third heat exchanger for heat exchanging, by &#x201c;flow a&#x201d; which has been expanded by the first decompressing device as a refrigerant, the remaining flow (&#x201c;flow a&#x201d;) of &#x201c;flow a&#x201d; after excluding &#x201c;flow a&#x201d; that has been branched and thus cooling the same; and a second decompressing device for expanding &#x201c;flow a&#x201d; which has been cooled by the third heat exchanger.

In a steam turbine seal packing performance monitoring system, steam pressure is measured by installing a pressure sensor inside a seal packing for preventing steam from leaking, so that pressure information can be transmitted using magnetic field communication in order to externally monitor seal packing performance. The system includes a seal packing unit that is installed on a rotor shaft and has a plurality of seal packs disposed along an axial direction of the rotor shaft; a pressure sensor installed inside the seal packing unit to detect a pressure of steam leaked from inside the seal packing unit and to transmit a magnetic field signal by converting a detection signal indicative of the detected pressure into the magnetic field signal; and an adapter for receiving the magnetic field signal, converting the received magnetic field signal into pressure data, and calculating a leakage amount of steam based on the pressure data.

Steam turbine seal packing performance monitoring system using magnetic field communication

A power charging and selling device includes first and second connection units configured to be connected to an electric vehicle and at least one power supplier server, respectively; a control unit for receiving a unique identifier and battery information of the electric vehicle through the first connection unit and for receiving power-trading charge information provided from each power supplier server through the second connection unit; and a guide unit for advertising the received power-trading charge information and for enabling selection of a corresponding power supplier. Through the first connection unit, the control unit may charge the electric vehicle with the power of a selected power supplier or sell the power stored in the electric vehicle to a selected power supplier. The power charging/selling device receives charge information from power suppliers, and a user selects the charging/selling scheme accordingly, even if the power source of the electric vehicle is turned off.

Power charging/selling device and method

An earring-type microphone to be hung on and used in the ear includes fixing members to be fixed to both ears of a user and a cable formed from an elastic member, of which both ends are respectively positioned at two fixing members, such that one side of the cable comes into close contact with the neck of the user. Speakers are respectively coupled to ends of the cable. A microphone part is provided at one side of the cable for inputting a voice. If force is applied to the microphone part when the user inputs the voice, the cable is stretched such that the microphone part moves from the neck of the user toward the area around the mouth. If the force applied to the microphone part is removed, the microphone part comes into close contact with the area around the mouth by the elastic force of the cable.

Earring-type microphone

The present invention relates to an ear device for fixing an earphone, comprising: a fixing body which is formed in the shape of a C-shaped ring so as to be worn on and fixed to an auricle while surrounding the rear part of the auricle; an earphone module, positioned in a groove in the front part of the auricle, for transferring sound to an ear hole; and a support connector which extends in the shape of a ring that traverses a user's auricle from one portion of the fixing body to the earphone module, the support connector being formed of an elastic body or flexible metal so as to, according to deformation of the support connector, enable the fixing body and the earphone module to be separated from each other or to approach each other so that the fixing body and the earphone module are engaged with and fixed to each other on the auricle. The fixing body has a first coupling member on one side thereof, the earphone module has a second coupling member on one side thereof, and both ends of the support connector are detachably configured so as to be separated from and coupled to the first coupling member and the second coupling member so that it is possible to use the fixing body and the earphone module by integrally coupling the fixing body and the earphone module, or it is possible to use the earphone module alone according to a user's need. The earphone module further comprises a sound box, a length adjustment unit and an accessory, and the accessory and the fixing body have an electronic chip such as an RFID or authentication key embedded therein. Thus, the present invention has effects of: firmly and stably fixing an earphone to a user's ear with the least number of constitutional elements; pre-empting occurrence of ear pain and hearing impairment since the earphone is not directly inserted into the user's ear hole; and enabling the user to hear ambient sound, thereby enabling the user to rapidly cope with surrounding circumstances and escape from safety accident-related danger.

Ear device for fixing earphone

A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes an alloy containing silicon (Si), titanium (Ti), and iron (Fe), wherein the degree of amorphization of the alloy is raised by 40% or more by further adding copper (Cu) to the alloy.

Negative electrode active material for lithium secondary battery

Ear-mounted device

An ear instrument, including: a first body; a second body having one end rotatably coupled to the first body; and a first fixing member having a side coupled to the other end of the second body. The first fixing member is coupled to the rear part of the user's ear when the ear instrument is fitted to the user's ear. The first fixing member is formed in a C-shape.

Ear instrument to which various instruments and accessories can be fixed

The present disclosure provides an ear-mounted sound-output device with a position-adjustable sound-output unit, wherein the ear-mounted sound-output device comprises: a 'C' shaped body; a first connection cable; a sound-output unit coupled to one end of the first connection cable, wherein the body is stretched via application of an external force thereto, to allow the outer ear of the user to be inserted between both ends of the body, and the body is secured around the outer ear with the body being restored via withdrawal of the external force, wherein the first connection cable is configured to move through the accommodation space and the hollow portion depending on a usage environment of the device.

Ear-mounted sound-output device with position-adjustable sound-output unit

A negative electrode active material and a secondary battery are provided. The negative electrode active material can be useful in maintaining excellent cell efficiency and lifespan while showing high-capacity properties, and the secondary battery may be manufactured using the negative electrode active material.

Growing community of inventors

Seoul, South Korea

Seung Chul Lee