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化工学报  2015 

LNG动力渔船的冷能利用技术初探

DOI: 10.11949/j.issn.0438-1157.20150697, PP. 50-55

Keywords: 液化天然气,冷能回收,(火用),渔船,冷库

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Abstract:

液化天然气(LNG)动力渔船推广前景广阔,为提高其LNG冷能的利用效率,对比分析了在船舶上利用LNG冷能的冷库和发电两种方案的利弊,并在此基础上提出了一种新的LNG冷能利用系统。通过热力学分析,获得了不同有机朗肯循环(ORC)冷凝温度、蒸发温度和载冷剂出口温度条件下系统的冷能利用率及效率。分析结果表明,系统冷能利用率随朗肯循环冷凝温度的降低、蒸发温度的升高而有显著提高;随载冷剂出口温度升高,系统冷能利用率稍有提高,但载冷剂流量显著增大。该系统冷能利用率及效率最大值分别达200.1%和28.6%,可实现LNG冷能利用率的大幅提升,节能效果显著。

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