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化工学报  2015 

新型独立B型液化天然气船围护系统及蒸发率计算

DOI: 10.11949/j.issn.0438-1157.20150694, PP. 101-107

Keywords: 液化天然气船,独立B型围护系统,数值模拟,对流,传热,蒸发率

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Abstract:

以一艘17万立方米新型独立B型液化天然气(LNG)船为研究对象,将该型围护系统与传统薄膜型和MOSS独立球型围护系统进行详细对比,突出该型围护系统的特点;分析船体和舱室结构后,通过合理和必要的简化,提供了一种计算独立B型液货舱传热的方法,通过数值模拟计算不同工况条件下液货舱的蒸发率,研究了聚氨酯泡沫绝热材料的热导率变化对液货舱蒸发率的影响。得到以下结论:(1)新型独立B型围护系统与传统围护系统相比有突出优势,在将来有很好的应用前景;(2)绝热层厚度为450mm时,为了满足日蒸发率不能超过0.1%的限定要求,所选用的绝热材料的热导率应当小于或等于0.03W·m-1·K-1。

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