ハイブリッド構造を有するLNG,LH_2球形タンクスカートの伝熱特性

概要

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Heat gain through the supporting skirt of spherical tank of MOSS type LNG carrier or spherical tank of LH_2 carrier is estimated as much as 10 to 20 percentages of total heat flow of tank for LNGC and the more for LH_2 tank. For the reduction of the evaporation rate of the liquefied cargo, an enhancement of tank insulation itself reaches almost to the physical limitation due to not only the space available in hold but also limited selection of material. Authors paid an attention to the hybrid thermal insulation system by inserting a non-metalic materials having a low thermal conductivity in between the aluminum alloy and mild steel. In this paper some configurations adopting the wooden material have been studied in combination with the conventional materials and tested under the cryogenic condition using liquefied nitrogen. The excellent results on the thermal isolation effect were observed for the test of different kind of wooden constructions. This will indicate the first step to the possibility of thermal floating construction of a spherical tank support.
社団法人日本船舶海洋工学会の論文
2000-03-29