摘要
针对低温进气对液化天然气闪蒸气(BOG)压缩机容积效率影响很大的问题,搭建了低温进气压缩机性能测试实验台。通过在气缸不同位置安装温度传感器,测量了不同进气温度下压缩机气缸内气体温度及外壁面温度,采用体积流量计测量了压缩机实际进、排气流量;通过在压缩机进口前的管路上缠加热带,采用并联铜管旁通管路,实现了进气温度调节。根据测量结果对影响容积效率的因素,特别是温度系数和进气系数进行了计算分析,结果表明:BOG压缩机稳定运行时,随着进气温度从-54.2℃降低到-142.2℃,进气系数、温度系数和容积效率均明显减小,分别下降了25.5%、25.0%和23.75%;进气温度为-142.2℃时,气缸外壁面温差达到最大值76℃。该结果可为闪蒸气回收式压缩机气缸设计提供参考。
The low suction temperature has a significant effect on the volumetric efficiency of BOG （boil-off gas） compressors. A test rig with temperature sensors was built up to investigate the temperature distribution in the cylinder at various suction temperatures. The suction and discharge flow rates were both measured by the volume flow meter. The heating tape on the pipe before the compressor inlet and the by-pass line were used to adjust the suction temperature. From the test data, the main factors influencing the volumetric efficiency were analyzed, focusing on the temperature coefficient and the suction coefficient. The results show that the suction coefficient, temperature coefficient and volumetric coefficient decreased by 24.4%, 25%, and 23.75%, respectively, when the suction temperature decreased from -54.2 ℃ to --142.2 ℃. The temperature difference on the cylinder outer surface reached the maximum, 76 ℃, at the suction temperature of --142.2 ℃.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2014年第3期68-71,127,共5页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(51106120)
国家科技支撑计划资助项目(2012BAA08B03)
关键词
闪蒸气压缩机
闪蒸气回收
低温进气
容积效率
boil-off gas compressor
boil-off gas recovery
low suction temperature
volumetricefficiency
