涡旋式高压气体膨胀机做功过程的热力学分析  

Thermodynamics Analysis of Working Process on Scroll High-pressure Gas Expander

作　　者：童明伟[1] 胡鹏[1] 

机构地区：[1]重庆大学动力工程学院,重庆400030

出　　处：《机械工程学报》2010年第20期139-144,共6页Journal of Mechanical Engineering

基　　金：重庆市科委2009年重点攻关资助项目(CSTC.2009AB3084)

摘　　要：随着天然气大量应用及其相关技术的不断发展,天然气管网的输送压力也越来越高,蕴含巨大的压力能。为充分利用天然气出口压力能及解决天然气在开采过程中降压产生的冰堵,设计一种可利用天然气自身压力发电并防堵的天然气井口涡旋式高压气体膨胀机。详细论述涡旋式高压气体膨胀机的结构及工作原理,按工程热力学、气体动力学理论对涡旋式高压气体膨胀机的旋流体进行了受力分析,并对涡旋式高压气体膨胀机工作过程进行热力学分析,在h-s图上定性地表示热力过程,获得了过程中相关参数的计算公式,对涡旋式高压气体膨胀机在不同条件下的做功能力进行实例计算,获得其在不同条件下的做功能力。为建立完整的涡旋式高压气体膨胀机设计理论提供依据。With the widespread application of natural gas and the continuous development of related technologies,the transmission pressure of natural gas pipe networks is becoming higher and higher,resulting in the accumulation of tremendous pressure energy.In order to make full use of the pressure energy of natural gas and solve the ice blocking produced by pressure drop in the mining process,a scroll high-pressure gas expander（SHGE） of natural gas wellhead is designed which can use its own pressure energy for power generation and prevent ice blocking.The operation principle and structures of SHGE are discussed in detail,then the force and work process according to aerodynamics and engineering thermodynamics on rotating body,thermodynamics process is expressed in h-s diagram,and the equations for the relevant parameters of thermodynamics process are obtained.Finally working capacities of SHGE are calculated with some examples under different conditions.The results provides a basis for establishing a complete design theory for SHGE.

关 键 词：压力能 冰堵 涡旋式高压气体膨胀机 气体动力学 热力过程 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]