摘要
在液化天然气(Liquefied Natural Gas,LNG)船运营过程中,货舱内的LNG会因晃荡和外界环境热量的传入而不断地蒸发,进而导致货物减少。为满足《国际散装运输液化气体船舶构造与设备规则》(IGC)关于货舱压力的控制要求,必须用专门的设备消除多余的天然气,这势必造成资源浪费。目前常用的方法是通过采用不同的制冷液化技术,对货舱蒸发的天然气进行液化,使其返回货舱,保证货物没有损失。主要介绍氮气膨胀制冷液化技术、混合制冷液化技术和直接制冷液化技术的性能特点,并进行简要的分析对比和实际应用介绍。
The Liquefied Natural Gas （LNG） inside cargo tank will be boiled off due to sloshing and the ingress of external heat during transportation, and thus lead to the reduction of cargo amount. In order to meet the IGC requirements on cargo pressure control, it is necessary to use some special equipment to eliminate the boiled-off-gas （BOG）, but this will inevitably cause the loss of cargo. The most common method at the moment is to use refrigeration and liquefaction technologies to liquefy BOG and sent it back to the cargo tank, in this way to keep the cargo unlost. This paper mainly introduces the performance of the nitrogen expansion refrigeration and liquefaction technology, the hybrid refrigeration and liquefaction technology, and the direct refrigeration and liquefaction technology, makes some brief comparison and analysis on these technologies, and elaborates some of the practical applications.
作者
徐帅
施方乐
XU Shuai;SHI Fang-le(Hudong Zhonghua Shipbuilding（Group）Co.,Ltd.,Shanghai 200129,China)
出处
《船舶与海洋工程》
2018年第5期35-38,共4页
Naval Architecture and Ocean Engineering
关键词
制冷液化
氮气膨胀制冷
混合制冷
直接制冷
refrigeration and liquefaction
nitrogen expansion refrigeration
hybrid refrigeration
direct refrigeration
