隧道窑烟气换热器肋板强化传热的数值研究  

Numerical Study on Finned Enhanced Heat Transfer Used in a Tunnel Kiln'S Flue Gas Heat Exchanger

作　　者：李杰[1] 胡国林[1] 朱永红[1] 孙健[1] 

机构地区：[1]景德镇陶瓷学院,江西景德镇333001

出　　处：《陶瓷学报》2014年第3期318-321,共4页Journal of Ceramics

基　　金：江西省教育厅科学技术研究项目(编号:GJJ12501);景德镇市科技项目(编号:2011-1-29)

摘　　要：为了考察换热管外加装肋板对于某隧道窑烟气换热器换热性能的影响情况,利用计算流体动力学软件FLUENT,分别对无肋板和加装1、2、3块肋板四种情况下换热器内部的流场和温度场进行了数值模拟。根据模拟结果,加装1、2、3块肋板相对于不加装肋板,换热器的空气出口处的平均温度分别提高了0.7℃、2.6℃、3.7℃,空气流经换热器的机械能损失分别增加了0.5 Pa、3.1 Pa、5 Pa。由计算可知,加装三块肋板换热器相对于不加装肋板换热器每年所增加的能源节约量相当于22.2吨标准煤的发热量。因此,采用加装肋板这一强化传热方式,对于提高某隧道窑烟气换热器的换热性能的效果明显。In order to investigate effects of fins on heat transfer characteristics of a tunnel kiln＇s flue gas heat exchanger, flow fields and temperature fields in four exchangers under operative conditions are separately simulated using FLUENT-code, the related four exchangers being the exchanger without fins, and with one, two, or three fins. According to simulation results, compared with the exchanger without fins,the exchanger with one, two, or three fins increases the mass-weighted average temperature at the air outlet separately by 0.7 ℃ 2.6 ℃, and 3.7℃, and increases the mechanical energy loss of the air flowing across the exchanger separately by 0.5 Pa, 3.1 Pa, and 5 Pa. After calculations,compared with the exchanger without fins, the exchanger with three fins increases the saved energy by an amount of 22.2 tons of standard coal a year. On the basis of the above data, a conclusion is drawn that the heat transfer characteristics of the tunnel kiln＇s flue gas heat exchanger is apparently improved for use of the finned enhanced heat transfer technology.

关 键 词：陶瓷隧道窑烟气换热器 肋板 强化传热 流场和温度场的数值模拟 

分 类 号：TQ174.6[化学工程—陶瓷工业]