大功率离心式压缩机后空冷器喷雾降温数值模拟与性能提升  

Numerical Simulation and Performance Improvement of Spray Cooling for Rear Air Cooler of High-power Centrifugal Compressor

作　　者：彭阳 戴志向 梁力 陈敬东 别沁 唐秋 吴瑕 PENG Yang;DAI Zhixiang;LIANG Li;CHEN Jingdong;BIE Qin;TANG Qiu;WU Xia(Gathering and Transportation Engineering Technology Research Institute of Southwest Oil and Gas Field Company,CNPC;Gas Management Office of Southwest Oil and Gas Field Company,CNPC;Petroleum Engineering School,Southwest Petroleum University)

机构地区：[1]中国石油西南油气田公司集输工程技术研究所 [2]中国石油西南油气田公司输气管理处 [3]西南石油大学石油与天然气工程学院

出　　处：《油气田地面工程》2024年第7期1-8,共8页Oil-Gas Field Surface Engineering

基　　金：国家自然科学基金面上项目“X70/X80钢掺氢天然气输送管道氢脆失效机理及安全服役能力研究”(52074238);中国石油西南油气田分公司科学研究与技术开发项目“支撑西南油气田生产经营高质量发展的新型标准体系研究”(20220310-02)。

摘　　要：川渝地区骨干管网部分压缩机后空冷器在夏季高温环境中使用时出现了风扇直接降温效果不达标的情况,为此,研究了增加喷雾降温系统辅助后空冷器进行加速散热的方法进行辅助降温。采用ANSYSWorkbench软件构建后空冷器翅片管束的仿真模型,模拟了不同喷雾降温工况中翅片管束的流场变化,基于数值模拟分析结果,提出了后空冷器喷雾降温系统自动化控制方法。研究结果表明:喷雾量会直接影响后空冷器翅片管管壁换热系数及管内天然气冷却效果,可通过调节喷雾量的大小来控制出口处天然气温度;喷雾液滴直径越小,蒸发吸热效果越好,但会增加设备投资成本;增加喷雾降温装置后的翅片管束散热效果能够满足夏季天然气外输要求;采用喷雾降温系统自动控制方案能够优化设备运行过程,实现节能降耗。The direct cooling effect of fans is not up to standard when the rear air coolers of some compressors in the backbone pipe network of Sichuan and Chongqing are used in the high temperature environment in summer.Therefore,the method of adding a spray cooling system to assist the rear air cooler to accelerate heat dissipation is studied.The simulation model of the finned tube bundle in the rear air cooler is constructed by using ANSYS Workbench software.The flow field variation of the finned tube bundle in different spray cooling conditions is simulated.Based on the numerical simulation analysis results,the automatic control scheme for the rear air cooler spray cooling system is proposed.The results show that the spray volume can directly affect the heat transfer coefficient of the finned tube wall,and the cooling effect of the natural gas in the tube.The outlet natural gas temperature can be controlled by adjusting the spray volume,the smaller the diameter of the spray droplet,the better the evaporative heat absorption effect,but it will increase the equipment investment cost.The heat dissipa-tion effect of the finned tube bundle after adding the spray cooling device can meet the requirements of natural gas export in summer.The automatic control scheme of the spray cooling system can optimize the operation process of the equipment,and achieve energy saving and consumption reduction.

关 键 词：离心式压缩机 空冷器 翅片管 喷雾 数值模拟 自动控制 

分 类 号：TE974[石油与天然气工程—石油机械设备]