Abstract
Abstract - The analysis of the cost optimization and the total demand weight of 9% Ni-steel plates for installing shell stiffeners in the side wall of the large capacity LNG storage tank are carried out in order to reduce the costs of the plates for stiffeners. This study can be possible for developing the calculation program which evaluates the bill-of-material for stiffeners to reduce the manual calculation time of tank designer, and to enable the est imation of weight and cost for vari-ous plate width. The results show that the demand weight and co st are reduced as the plate width is wider. Nevertheless, both the weight and the cost with plate width for stiffeners should be com-pared and evaluated to obtain the optimum cost time to time because of various cost incremental factors of plates such as transportation and handling cost, etc.Key words : stiffener, LNG storage tank, plate width, plate weight, plate cost 1) I. 서 론 LNG는 편리하고 저렴하면서 깨끗하여 국내 주요 에너지원으로 자리를 확고히 하고 있다. 도시가 † Corresponding author:yunsangkook@daum.net Copyright ⓒ 2014 by The Korean Institute of Gas
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