摘要
双混合制冷剂液化工艺(DMR)在海上浮式天然气液化装置(FLNG)上应用时,受海浪倾斜的影响,绕管式换热器会存在液体偏流换热不充分的现象,从而影响液化工艺的性能指标。为了研究海况倾斜条件对DMR整体工艺的影响,搭建了倾斜条件下绕管式换热器换热与压降性能测试实验装置,编写接口程序动态调用Refprop软件计算热物性,得到在倾斜条件下换热系数与努赛尔数等参数随时间变化情况。搭建DMR动态工艺模型,基于实验数据的无量纲分析结果,改变绕管式换热器换热性能,研究倾斜条件下DMR液化工艺的性能指标。研究结果表明,随着倾斜角度的增大,绕管式换热器换热性能逐渐降低;倾斜9°时,绕管式换热器努赛尔数降低了66%,DMR液化工艺比功耗升高了10.6%。
When the dual mixed refrigerant (DMR) liquefaction process is used in LNG floating (FLNG) production storage and offloading unit, the spiral wound heat exchanger (SWHE) suffers current bias and insufficient heat exchange due to the tilt effects of wave,which affects the performance index of liquefaction process. In order to study the influence of wave tilt on the overall liquefaction process, the performance test devices of spiral wound heat exchanging and pressure drop under tilt conditions are constructed. The interface program is written to dynamically call Refprop software to obtain the parameters such as heat transfer coefficient and Nusselt number changed with time. A dynamic process model of DMR is established. Based on the experimental non- dimensional results, the heat exchange performance of SWHE is changed, and the performance index of DMR liquefaction process under tilt conditions is studied. The results show that the heat transfer performance of SWHE decreases with the increase of tilt angle. With the tilt angle of 9°, the Nusselt number of SWHE decreases by 66%,and the specific power consumption of DMR liquefaction process increases by 10.6%.
作者
孙崇正
李玉星
韩辉
朱建鲁
王少炜
刘亮
SUN Chongzheng;LI Yuxing;HAN Hui;ZHU Jianlu;WANG Shaowei;LIU Liang(Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety)
出处
《油气田地面工程》
2019年第10期49-56,共8页
Oil-Gas Field Surface Engineering
基金
国家自然科学基金（51604294）
山东省自然科学基金（ZR2016EEQ02）
中央高校基本科研业务费专项资金（15CX02043A）资助
关键词
海上浮式天然气液化装置
双混合制冷剂液化工艺
动态模拟
绕管式换热器
可靠性
dual mixed refrigerant liquefaction process
offshore floating LNG device
dynamic simulation
experiment
spiral wound heat exchanger
reliability
作者简介
孙崇正,中国石油大学(华东)在读博士生,从事液化天然气工艺及关键设备研究,18353240392,zgsydxscz@163.com,山东省青岛市黄岛区长江西路66号中国石油大学(华东)工科实验楼D-401室,266580。
