天然气压力能回收装置热力学分析  

Thermodynamic Analysis on Pressure Energy Recovery Equipments of Natural Gas

作　　者：郑志[1] 石清树[1] 王树立[2] 

机构地区：[1]江苏工业学院江苏省油气储运技术重点实验室,江苏常州213016 [2]江苏工业学院机械与能源工程学院,江苏常州213016

出　　处：《节能技术》2009年第5期396-400,共5页Energy Conservation Technology

基　　金：江苏省科技厅资助项目(BS2007028);江苏省教育厅资助项目(04KJB440030)

摘　　要：高压天然气调压过程中存在着巨大的可供回收的压力能,节流阀、透平膨胀机、气波制冷机、涡流管是典型的能量回收设备。在对上述四种能量回收装置进行简要介绍之后,以火用概念为基础,以火用平衡为工具,对其进行了全面的热力学分析。结果表明:透平膨胀机的火用效率最高,其次是气波制冷机、涡流管、节流阀,且当膨胀比变化时,透平膨胀机的性能较稳定。涡流管、气波制冷机具有分离效果,可用于天然气脱水预冷。研究结果对于压力能回收装置的选用和调压流程的优化具有一定的指导意义。A great amount of pressure energy, which is generated during the pressure regulation of high - pres- sure natural gas, could be recovered by means of energy recovery equipments such as throttle valve, turbo expander, gas wave refrigerator and vortex tube. Based on the concept of exergy, the comprehensive thermodynamic analysis for above mentioned equipments is proceeded with exergy equilibrium. The exergy efficiency of turbo expander is the highest, and then is gas wave refrigerator, vortex tube and throttle valve according to priority. When the ratio of expansion varies, the performance of turbo expander is relatively stable. The vortex tube and gas wave refrigerator could be utilized in the procedures of natural gas dehydration and precooling on account of the capability of separation and refrigeration. These findings will facilitate the selection of pressure energy recovery equipments and the process optimization with pressure regulation.

关 键 词：[火用] 压力能 回收装置 天然气 气波制冷机 

分 类 号：TK123[动力工程及工程热物理—工程热物理] TU996[动力工程及工程热物理—热能工程]