20500.158346180000.1535995.74.1746.18E-018.02E-045.4264.5983.14.1796.59E-014.69E-042.990.9695803.520003.9338829.361058470.823.48884678804.1836.83593060.0250.024.51150.0180550.309091391冷进口温度冷出口温度冷水压力热水进口温度热水出口温度热水流量热水压力冷却水定性温度冷却水密度冷却水比热冷却水导热系数冷却水粘度冷却水普兰特数（查表）热水定性温度热水密度热水比热热水导热系数热水粘度热水普兰特数换热效率（自定0.9+）设计传热量冷水流量逆流平均温差温度校正系数有效平均温差试选换热系数初选换热面积管子外径管子内径管子长度总管子数管程流通截面管程流速7679.6581031792.9143310.032120.050.4529.9557522120.09040.15066666728.867256640.0148971670.341404021335.63429290.02517890.953781.1547182.41081470.9864741.0321890.0001720.0003440.001467113681.61054650.84758455417127.9977854.99525383管程雷洛数管程换热系数管间距管束中心处一排管束管束外径与壳体间距壳体内径长径比弓形折流板弓高折流板间距折流板数壳程流通截面壳程流速壳程质量流速壳程当量直径壳程雷洛数管间距比值壳程努塞尔数管排修正系数壳程换热系数冷却数侧污垢热阻热水侧污垢热阻总传热热阻传热系数传热系数比值大小管壁外热流密度管壁外温度5.49E-041.0542948430.035710.5437224380.50670831225.70671131.6337111.42659.1043140.03980432828485.495860.335018.336478994.8972755.126974884027.3438661.8213915.843231.77E-029.28E-02壁温下水的粘度管程粘度修正系数管程摩擦系数管子沿程压降回弯压降进出口质量流速进出口压降管程结垢校正系数选取速度1.231100管程压降当量直径雷诺数壳程摩擦系数管束压降管嘴处质量流量进出口压降导流板阻力系数 5-10导流板压降壳程结垢修正系数壳程压降管程允许压降壳程允许压降压降校核P0.4761904761.233333333<0.5<0.50.984选取速度1.01280 R104.277227558.0231175111.79618582管程努塞尔数Prw3.54307.7622985速度最大值1.820508523速度最大值1.495934204