热管空气预热器计算书

4002020016271330查表1-51.4631.2961.2961.296热负荷及出口温度310262.4269.6541查表1-51.4356271.449314268.4232初选44热管列数计算0.4533332.1866672.1866670.2066820.1689530.2504230.82533蒸发段长度阻断系数烟气迎风面速度空气迎风面速度烟气迎风面积空气迎风面积预热器高度烟气侧流速空气侧流速热管长度热管光管直径肋片外径肋片厚度肋片高度肋片间距热管横向间距烟气出口比热烟气平均比热校核烟气出口温度热负荷烟气入口温度空气平均比热烟气出口温度热管纵向间距热管工质热管导热系数烟气入口比热烟气出口比热空气入口比热空气出口比热空气入口温度空气出口温度烟气流量空气流量0.674674.006775取整4换热系数计算110查物性参数定性温度334.21160.0000320.7020.0000240.0000512空气5845.5430.64737.011040.0000510.0473740.04590.6761430.05296244.99484查图2-12翅片效率0.910.5624350.5914340.5247130.1111591723.68烟气4361.21329.359250.0601280.056150.8271320.0647880.7506550.6288630.1629722358.033热管排数计算蒸发段与烟气换热系数烟气热容量参数mh翅片效率参数m光管换热面积实际烟气侧换热系数蒸发段热管换热系数翅片换热面积实际空气侧换热系数凝结段热管换热系数凝结段与空气换热系数空气热容量烟气雷诺数烟气努赛尔数烟气对流换热系数光管除翅片换热面积空气对流换热系数光管除翅片换热面积翅片换热面积光管换热面积空气导热系数空气普朗特数空气动力粘度空气雷诺数空气努赛尔数烟气定性温度烟气导热系数烟气普朗特数烟气动力粘度冷凝段长度热管列数空气定性温度结构参数U-0.03713结构参数P6.520757排数5.947128取整6热管数241.50.0250.05温度0.0004℃天然气、焦炉煤气、液发生炉煤气、高炉煤气0.01250~2001.3791.4210.003200~4001.4211.4630.0625400~7001.4631.5050.0541700~10001.5051.547水1000~12001.5471.5880.1171200~15001.5881.631500~18001.631.6721800~21001.6721.714表1-5燃烧产物和空气的平均比热，kJ/(标m3·℃)燃烧产物的比热C烟壁温222.10580.6830.66空气壁温下普朗特数烟气壁温下普朗特数空气的比热C空1.2961.2961.3381.3791.4211.4631.4631.505表1-5燃烧产物和空气的平均比热，kJ/(标m3·℃)