制冷机组二氟甲烷泄漏抑扩状态及影响因素分析

制冷机组二氟甲烷泄漏抑扩状态及影响因素分析摘要2023年3月27日，河北沧州一冷库因制冷剂泄漏产生爆燃，从而引发大面积爆炸和火灾，最终导致11人死亡。2023年7月7日，河南信阳罗山县发生一起爆炸事故，发生事故的是一家雪糕店，事故最终造成1人死亡，一人重伤，该起事故的主要原因是因为冰箱内压缩机故障而导致爆炸。在当前社会，每家每户都配备制冷机组，有些甚至不止一台，况且制冷机组基本是24小时工作，这意味着人们在日常生活中每时每刻都具备危险。这些事故导致人们在日常使用制冷机组时不能安心，时刻需要担心可能会发生的危险事故。本文章基于文献调研，使用数值模拟的方法利用有限元分析软件，以2023年信阳雪糕店等爆炸事故为案例基础，分析制冷机组工作流程，找出主要涉及的设备。之后通过ANSYS集成平台中SCDM建模工具建立出压缩机实体仿真模型，随后在FLUENT meshing中划分压缩机网格，之后导入到FLUENT求解器中进行压缩机压力场、速度场进行分析，得出在控制流速、流量情况下对于二氟甲烷泄漏抑扩状态及影响因素。最后希望通过本次仿真模拟结果，可以为之后预防、处理此类事故，事故应急等不同方面提供一定的参考意义。关键词ANSYS:FLUENT:二氟甲烷：压缩机：压力场-I-Analysis on the expansion suppression state ofdifluoro methane leakage in refrigeration unitand its influencing factorsAbstractOn March 27,2023,a cold storage in Cangzhou,Hebei Provinceexperienced a large-scale explosion and fire due to refrigerant leakage,leadingto 11 deaths.On July 7,2023,an explosion accident occurred in LuoshanCounty,Xinyang,Henan Province,involving an ice cream shop.The accidentultimately resulted in one death and one serious injury,and the main cause of theaccident was a compressor failure inside the refrigerator.In contemporarysociety,every household is equipped with refrigeration units,and some evenhave more than one.Additionally,refrigeration units operate 24 hours a day,which means that people are constantly exposed to potential dangers in theirdaily lives.These accidents have caused people to feel uneasy when usingrefrigeration units in daily life,constantly worrying about possible dangerousaccidents.Based on literature research,this article employs numerical simulationmethods using finite element analysis software.Taking the explosion accident atthe Xinyang ice cream shop in 2023 as a case study,it analyzes the workingprocess of refrigeration units and identifies the main equipment involved.Subsequently,the SCDM modeling tool in the ANSYS integrated platform isused to establish a compressor solid simulation model.The compressor grid isthen divided in FLUENT meshing and imported into the FLUENT solver foranalysis of the compressor's pressure and velocity fields.The simulation aims to-Ⅱ-determine the state of diffusion suppression and influencing factors ofdifluoromethane leakage under controlled flow rate and flow conditions.Finally,it is hoped that the results of this simulation can provide a certain reference forpreventing and handling such accidents as well as emergency response in thefuture.Keywords ANSYS,FLUENT,difluoro,methane compressor pressure field-川-目录摘要...-.-m----.-m------m----IAbstract.…I第1章绪论1.1课题背景1.1.1研究背景11.1.2研究意义21.2国内外研究现状分析21.2.1国内研究现状21.2.2国外研究现状.…31.2.3国内外研究现状总结.…1.3论文主要研究内容与技术路线图1.3.1论文主要研究内容1.3.2论文研究技术路线图…第2章二氟甲烷基本参数及仿真软件介绍72.1二氟甲烷的简介及基本参数2.1.1二氟甲烷简介…72.1.2二氟甲烷的基本参数72.2仿真软件介绍.…82.2.1 ANSYS简介2.2.2 FLUENT简介.92.2.3SCDM简介.…102.3本章小结.…10第3章压缩机实体模型的建立及前处理113.1制冷机组工艺情况分析及事故分析..113.1.1制冷机组工艺情况分析113.1.2事故分析.123.2物理模型的建立及网格划分123.2.1物理模型建立123.2.2模型简化…153.2.3网格划分153.2.4网格质量验证173.3方程选择193.3.1湍流模型选择19-v.