基于低浓度瓦斯利用的换热器设计及数值分析  

Design and numerical analysis of heat exchanger based on utilization of low-concentration methane

作　　者：杨攀 代华明 朱惠薇 张冰倩 YANG Pan;DAI Huaming;ZHU Huiwei;ZHANG Bingqian(School of Safety Science and Emergency Management,Wuhan University of Technology,Wuhan Hubei 430070,China)

机构地区：[1]武汉理工大学安全科学与应急管理学院,湖北武汉430070

出　　处：《中国安全生产科学技术》2021年第12期105-110,共6页Journal of Safety Science and Technology

基　　金：国家重点研发计划项目(2018YFC0808500);国家自然科学基金项目(51804237);湖北省自然科学基金项目(2018CFB207)。

摘　　要：为提高低浓度瓦斯利用效率,对螺旋式、列管式、翅片式3种换热方式进行参数化研究,探讨不同形状换热方式对预热效果的影响,并通过改变流速和温度研究螺旋管换热效果。结果表明:螺旋管换热效果相对最佳,并在v_(h)=0.9 m/s,v_(c)=2.0 m/s时换热温度相对最高。同时,随换热温度升高,出口温度逐渐升高,随速率增加,出口温度先升高后降低。通过研究换热器形状对换热效果的影响,优化换热方式设计,为低浓度瓦斯高效利用提供理论依据。In order to improve the utilization efficiency of low-concentration methane,it was proposed to realize the energy conservation and pollution reduction through the optimized preheating of heat exchanger.The parametric study on three heat exchange methods of spiral type,row tube type and fin type was conducted,and the influence of different shapes of heat exchange methods on the preheating effect was discussed.At the same time,the heat exchange effect when changing the flow rate and temperature in the spiral tube was studied.The results showed that the heat exchange effect of the spiral tube was the best,and the heat exchange temperature was the highest with v_(h)=0.9 m/s and v_(c)=2.0 m/s.Meanwhile,as the heat exchange temperature increased,the outlet temperature gradually increased.However,the outlet temperature increased first and then decreased with the increasing of velocity.Through studying the influence of heat exchanger shape on the heat exchange effect and optimizing the design of heat exchange methods,the results can provide theoretical basis for the efficient utilization of low-concentration methane.

关 键 词：乏风瓦斯 换热方式 流速 数值模拟 换热器形状 

分 类 号：X936[环境科学与工程—安全科学]