倒齿螺旋翅片管束换热及阻力特性试验研究  

Experimental Investigation of Heat Transfer and Pressure Drop Characteristicsof Serrated Spiral Finned-Tube Bundles

作　　者：贺吉涛 史跃岗[2] 刘丹 刘天笑 林贞宇 周昊[3] 王子安 HE Jitao;SHI Yuegang;LIU Dan;LIU Tianxiao;LIN Zhenyu;ZHOU Hao;WANG Zi’an(Xinjiang Petroleum Engineering Co. ,Ltd. ,Kelamayi 834000,China;Hangzhou Boiler Group Co. ,Ltd. ,Hangzhou 310021,China;State Key Laboratory of Clean Energy Utilization Institute,Zhejiang University,Hangzhou 310027,China;Shanghai Inspection and Testing Institute of Instruments and Automation Systems Co. ,Ltd. ,Shanghai 200233,China)

机构地区：[1]中油(新疆)石油工程有限公司,新疆克拉玛依834000 [2]杭州锅炉集团股份有限公司,浙江杭州310021 [3]浙江大学能源清洁利用国家重点实验室,浙江杭州310027 [4]上海仪器仪表自控系统检验测试所有限公司,上海200233

出　　处：《自动化仪表》2021年第11期29-33,38,共6页Process Automation Instrumentation

基　　金：国家油气科技重大专项基金资助项目(2016ZX05031002)。

摘　　要：螺旋翅片管束是余热锅炉中重要的余热利用装置。为了探究操作条件对翅片管束换热性能的影响,研究了入口烟温、烟气流速、冷却水流量对一种新型结构翅片管——倒齿形螺旋翅片管束换热及阻力特性的影响。试验结果表明,倒齿形螺旋翅片管束的总换热量随着入口烟气温度、烟气流速和冷却水流量的提高而增大。当烟气温度从250℃提高到350℃,总换热量提高了约64%;当烟气流速由8 m/s提高到16 m/s时,努赛尔数(Nu)增大了约40.5%,冷却水流速升高对总换热量提升2.9%左右。此外,试验结果显示,烟气温度和冷却水流速对于欧拉数(Eu)的影响均较小。新型倒齿形螺旋翅片管束可提高高温烟气的余热利用率,节省天然气能源,提高联合循环电站的经济效益。该试验结果可为后续实际工程应用提供参考。Spiral finned-tube bundles are important for waste heat utilization devices in waste heat boilers.In order to explore the influence of operating conditions on the heat transfer performance of the finned-tube bundles,the effect of inlet flue gas temperature,flue gas flow rate and cooling water flow rate on the heat transfer and pressure drop characteristics of novel finned-tubes,the serrated spiral finned-tube bundles,are researched.The experimental results show that the total heat transfer rate of the serrated spiral finned-tube bundles increases as the inlet flue gas temperature,flue gas flow rate,and cooling water flow increase.When the flue gas temperature increases from 250℃to 350℃,the total heat transfer rate increases by about 64%.When the flue gas flow rate increases from 8 m/s to 16 m/s,Nusselt number Nu increases by about 40.5%.The increase in the cooling water flow rate improves the total heat exchange rate by about 2.9%.Besides,the experimental results show that the influence of flue gas temperature and cooling water flow on Euler number Eu is less.The novel serrated spiral finned-tube bundles can increase the waste heat utilization rate of high-temperature flue gas,and save natural gas energy,and improve the economic efficiency of combined cycle power plants.The exporimental results provide a reference for practical engineering applications.

关 键 词：倒齿 螺旋翅片管束 余热锅炉 操作条件 换热强化 阻力特性 换热性能 余热利用 

分 类 号：TH-39[机械工程]