http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
The Design and Assessment Procedure of LNG Carrier Pump Tower System
B.T.Oh(오병택),I.S.Yoon(윤인수),S.H.Kim(김성훈),J.H.Nam(남재형) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
A membrane-typed LNG carrier (LNGC) has two main structures in its Cargo Containment System (CCS); insulationmembrane structure and pump tower structure. The former structure typically needs to have liquid-tightness and vaportightness in order to prevent LNG or NG from leaking toward the outside of it and hand sloshing loads and hydrostatic pressure from LNG over to a hull structure. Of course, it should have a good cryogenic characteristic to contact with LNG directly. The latter structure consists of liquid-dome cover, four main columns (tower structure), bottom plate and bottom supports. Generally, the main columns are two discharging columns with pumps, one filling column and one emergency column. Several sensors, detectors and ladders are attached to them. In this paper, the design and strengthassessment procedure of a pump tower structure is introduced to understand KC-1 LNGC easier.
오병택(B.T. Oh),윤인수(I.S. Yoon),김성훈(S.H. Kim),남재형(J.H. Nam) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
LNGC(LNG Carrier) is a popular means of LNG transportation today and becomes of great importance to us in accordance with increase in LNG consumption. KOGAS has developed and improved the design of CCS(Cargo Containment System) for many years with the major shipyards. Inside of LNG-CCS, there are two major structural systems. One is a membrane-insulation containment structure and another is a pump tower structure. Especially, the pump tower structure consists of an emergency pipe, a filling pipe, two discharge pipes, several equipments for loading and unloading LNG and tubular members to join the main pipes. For the structural analysis of pump tower, sloshing load should be obtained from sloshing analysis and also additional loads should be considered such as inertial force due to ship-motion, thermal load and gravitational force from ship inclination. In this paper, the difference with the traditional pump tower of LNG-CCS is introduced to explain the design concept of KC-1 pump tower structure.
LNG저장탱크 Heating system 활용에 관한 연구
오병택(B.T. Oh),윤인수(I.S. Yoon),김영균(Y.K. Kim) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
In case of above-ground and in-ground type LNG storage tanks, a heating system should be installed because they have to be filled with cryogenic liquid, LNG. The cryogenic temperature of LNG might be transferred to the interface between concrete bottom slab and soil, and it can make the soil frozen. This phenomenon is called ‘Ice-Lens’. Ice-Lens caused by the volume expansion of the frozen soil can lift up the concrete structure or the equipment of LNG storage tank. Therefore, a heating system should be installed around the LNG storage tank to prohibit the Ice-Lens phenomenon. A heating system is operated in order to confine the growth of the frozen area within a design range, as is mentioned above. However, tank-open situation might occur during the commercial operation of LNG storage tank because of several reasons; the repair or the replacement of the equipment, etc. At this time, the heating system can be changed into a freezing system to protect the frozen area which works as a shield against the water penetration. The frozen area is essential for the LNG storage tank to prohibit the water penetration, but it shouldn’t be larger than necessary. In this paper, the heating and freezing processes will be introduced which were experienced by KOGAS