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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.
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.