CAJ | 학술논문

以国内某LNG接收站为例，利用HYSYS对蒸发气（Boil Off Gas，BOG）再冷凝工艺进行了模拟，在热力学分析基础提出了BOG多级压缩再冷凝工艺，并分析了性能参数对工艺能耗的影响，以此为根据提出了改进措施。经分析：多级压缩再冷凝工艺较典型的再冷凝工艺更为节能，可节约22.03%的能耗；压缩机压缩系数ri及BOG分流比xi对流程中压缩机能耗影响较大，可通过适当减小压缩系数ri与增大BOG分流比xi的方法来减少压缩机的能耗；外输LNG温度、压力对气化器、海水泵及外输泵的能耗影响较为明显，适当降低外输LNG温度与压力，能够有效改善这3个设备单元能量利用效率。
이국내모LNG접수참위례，이용HYSYS대증발기（Boil Off Gas，BOG）재냉응공예진행료모의，재열역학분석기출제출료BOG다급압축재냉응공예，병분석료성능삼수대공예능모적영향，이차위근거제출료개진조시。경분석：다급압축재냉응공예교전형적재냉응공예경위절능，가절약22.03%적능모；압축궤압축계수ri급BOG분류비xi대류정중압축궤능모영향교대，가통과괄당감소압축계수ri여증대BOG분류비xi적방법래감소압축궤적능모；외수LNG온도、압력대기화기、해수빙급외수빙적능모영향교위명현，괄당강저외수LNG온도여압력，능구유효개선저3개설비단원능량이용효솔。
Through thermodynamics-based analysis and improvement of BOG recondensation process at a domestic LNG receiving terminal by HYSYS, a BOG multi-stage compression and recondensation process model was established. And analyzing effect of the performance parameters of this process on the energy consumption is for the sake of proposing improved measures. The results showed that multi-stage compression and recondensation process was more saving than the traditional process (saving about 22.03%);the ri of compressor and the xi of BOG split ratio had big influence on the compressor energy, and reducing the ri of compressor and increasing the xi of BOG split ratio suitably can low the compressor energy; the energy of gasifier, seawater pump and last pump af-fected obviously by the temperature and pressure of LNG, and reducing the temperature and pressure of LNG suit-ably can effectively improve the energy efficiency of them.