以FSRU为载体对BOG液化循环计算分析  

Calculation and Analysis of BOG Liquefaction Cycle with FSRU as Carrier

作　　者：李苏澄 吴福龙 徐常安 Li Sucheng;Wu Fulong;Xu Changan(China Petroleum Pipeline Engineering Corporation,Langfang 065000,China)

机构地区：[1]中国石油天然气管道工程有限公司,河北廊坊065000

出　　处：《科学技术创新》2022年第12期1-6,共6页Scientific and Technological Innovation

摘　　要：BOG是储存在LNG罐时自然蒸发产生的气体(Boil Off Gas),一般利用氮气对BOG进行冷凝,然后将冷凝后的LNG重新回流输送到储罐中。本文选择以氮气为制冷剂采用逆布雷顿循环对BOG液化进行研究,分别对参与液化循环的设备进行建模并模拟了两种不同工况下的循环。通过计算分别给出BOG在不同温度时所对应的性能参数;通过改变氮气入口压力来分析不同液化循环的效率(COP),得出当减小氮气入口压力并控制氮气流速时整个液化循环的效率会提高,得出的结果对项目运行中BOG液化的成本控制有实际的借鉴意义。BOG is Boil Off Gas generated by natural evaporation when stored in LNG tank. Generally,NITROGEN is used to condense BOG, and then the condensed LNG is transported back to the LNG storage tank.In this paper, the inverse Brayton cycle is used to study the BOG liquefaction using nitrogen as the refrigerant.The equipment involved in the liquefaction cycle is modeled and the cycles under two different working conditions are simulated. The corresponding performance parameters of BOG at different temperatures are given by calculation.The COP of different liquefaction cycles was analyzed by changing the inlet pressure of nitrogen, and the efficiency of the whole liquefaction cycle was improved when the inlet pressure of nitrogen was reduced and the flow rate of nitrogen was controlled. The results obtained have practical reference significance for the cost control of BOG liquefaction in project operation.

关 键 词：BOG FSRU 液化循环 

分 类 号：TE89[石油与天然气工程—油气储运工程]