Abstract:
The present invention relates to a wireless communication system in a Wi-Fi environment. The present invention provides a wireless communication system in a Wi-Fi environment of a vessel which installs an application for wireless communication in a vessel, and enables the transmission of text, pictures, and video, and the usage of voice calls and CCTV features between a mobile device and another mobile device in a server system environment which is connected to a mobile device connected to wireless access points for data transmission with another mobile device and a server system which is a broadcast hub and has multiple of such access points.
Abstract:
PURPOSE: A fuel supply system of an offshore structure with a high-pressure natural gas injection engine and a re-liquefying device is provided to stably maintain LBOG(Liquefied Boil Off Gas) in a supercooling state. CONSTITUTION: A fuel supply system of an offshore structure with a high-pressure natural gas injection engine and a re-liquefying device comprises a BOG compression unit(13), a re-liquefying device(20), a high pressure pump(33), a high pressure vaporizer(37), and a BOG return line. The BOG compression unit is supplied with BOG from a storage tank(11), and compresses the BOG. The re-liquefying device liquefies the compressed BOG. The high pressure pump compresses LBOG liquefied in the re-liquefying device. The high pressure vaporizer supplies the BOG to the high-pressure natural gas injection engine by vaporizing the compressed BOG. The BOG return line returns the compressed BOG to the upper stream of the BOG compression unit in order to constantly control the pressure of the compressed BOG.
Abstract:
본 발명은 선박의 방 내부와 외부의 압력차로 인해 도어의 개방동작이 어려울 때, 도어의 전면패널과 후면패널을 서로 연통시켜 압력차를 줄일 수 있도록 함으로써, 도어의 개방동작이 신속하고 용이하게 이루어지도록 한다. 본 발명에 따른 선박용 도어 구조체는, 전면패널과 후면패널로 구성되는 도어 프레임을 구비하며 선박용 방의 외부와 내부를 개폐시키는 선박용 도어 구조체로서, 상기 후면패널에 천공 형성되는 통공과, 상기 전면패널에 상기 통공과 연통되도록 천공되는 통기공과, 상기 전면패널과 후면패널 사이에 마련되고 상기 통공을 선택적으로 개폐시킬 수 있으며 통공의 개방시 상기 방의 외부와 내부 압력차를 해소시키기 위한 연통수단으로 구성된다.