压缩空气与天然气降压过程的火用对比分析
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摘要
分析压缩空气降压过程与高压管道天然气降压过程比焓火用、比压力火用、比温度火用的变化,对两者进行对比分析。天然气降压过程与压缩空气降压过程比焓火用变化量变化趋势基本一致。终了压力相同时,随着初始压力的增大,天然气和空气的比焓火用变化量差值增大。在利用压缩空气模拟天然气降压过程中,对压缩空气比温度火用变化量和比压力火用变化量进行修正,给出了修正系数。
The changes of specific enthalpy exergy,specific pressure exergy and specific temperature exergy of the compressed air depressurization process and the pipeline natural gas depressurization process are analyzed,and the comparative analysis of the both is carried out. The change trend of specific enthalpy exergy variation of depressurization processes of thenatural gas and the compressed air is basically the same. The difference of specific enthalpy exergy variation of the natural gas and air increases with the increase of the initial pressure when the final pressure is the same. In the process of using compressed air to simulate natural gas depressurization,the specific temperature exergy variation and specific pressure exergy variation of compressed air are corrected,and the correction coefficient is given.
The changes of specific enthalpy exergy,specific pressure exergy and specific temperature exergy of the compressed air depressurization process and the pipeline natural gas depressurization process are analyzed,and the comparative analysis of the both is carried out. The change trend of specific enthalpy exergy variation of depressurization processes of thenatural gas and the compressed air is basically the same. The difference of specific enthalpy exergy variation of the natural gas and air increases with the increase of the initial pressure when the final pressure is the same. In the process of using compressed air to simulate natural gas depressurization,the specific temperature exergy variation and specific pressure exergy variation of compressed air are corrected,and the correction coefficient is given.
引文
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[3]王硕.北京市天然气管网压力能发电技术方案研究(硕士学位论文)[D].北京:北京建筑大学,2015:6-9.
[4]刘贺群,余洋.我国天然气管网发展现状和趋势[J].当代石油石化,2005,13(12):11-15.
[5]陈绍凯,李自力,雷思罗,等.高压天然气压力能的回收利用技术[J].煤气与热力,2008,28(4):B01-B05.
[6]王志方,李波,吴岩.天然气管道冰堵发生原因及解堵措施[J].天然气与石油,2014,32(1):43-46.
[7]傅秦生.能量系统的热力学分析方法[M].西安:西安交通大学出版社,2005:90-199.
[8]刘宗斌,徐文东,边海军,等.天然气管网压力能利用研究进展[J].城市燃气,2012(1):14-18.
[9]申安云,熊永强.天然气管网压力能利用工艺的火用分析[J].煤气与热力,2008,28(11):B43-B47.
[10] SHEN D M,FEMANDES F,SIMOES-MOREIRA J R.Using gas pipeline pressure to liquefy natural gas or generate electricity[J]. Hydrocarbon Processing,2006,85(1):47-50.
[11] MARIC I. The Joule-Thomson in natural gas flow rate measurements[J]. Flow Measurement and Instrumentation,2005,16(6):387-395.
[12]李静静.城市门站天然气调压过程中冷能的回收及应用研究(硕士学位论文)[D].重庆:重庆大学,2011:15-17.
[13]李静静,彭世尼.高压天然气降压过程中冷能的计算方法研究[J].天然气与石油,2011,29(2):4-7.
[14]徐晓菊,詹淑慧,丁国玉.北京市规划天然气气源互换性分析[J].天然气技术与经济,2013,7(1):60-63.