比如9518KW的制冷量,6/14℃供回水,DN400的水管,管子体积流量=0.86*9518/8=1023.158m3/h,质量流量就是1023158KG/h;流体流速=1023.158/3600/(3.14×0.22)=2.26m/s;雷诺数=密度×流速×管径/水的粘性系数=1000×2.26×0.4/1.3(平均水温10℃)=695沿程阻力系数=64/雷诺数=64/695=0.092
管子体积流量=0.86*9518/8=1023.158m3/h,质量流量就是1023158KG/h;
流体流速=1023.158/3600/(3.14×0.22)=2.26m/s;
雷诺数=密度×流速×管径/水的粘性系数=1000×2.26×0.4/1.3(平均水温10℃)=695
沿程阻力系数=64/雷诺数=64/695=0.092
比摩阻=沿程阻力系数/水管直径×流体流速2×水密度/2=0.092×2.262×1000/2/0.4=586.25pa/m
但用鸿业水力计算输入参数,显示DN400的管比摩阻才96pa/m,与算出的586.25pa/m差这么远的?哪里算错了?