板式换热器选型计算

换热器设计采用水水板式换热器分别在高区和低区设2台板式换热器选用两台换热器高区设计负荷为15983.4433719507.39082113087低区设计负荷为15983.4433720643.26052124446供水温度回水温度平均温度密度一次网供回水温度957082.5热侧970.21957082.5热侧970.21二次网供回水温度504045冷侧990.25504045冷侧990.25换热量MW1.3935换热量设计参数热侧冷侧设计参数介质水水介质进口温度℃9540进口温度出口温度℃7050出口温度质量流量t/h47.9364119.841质量流量确定管口：确定管口：管口直径mm40.0040.00管口直径选取管口mm8080选取管口对数温差△t对数温差△t△t1△t1△t2△t2传热系数Kw/m2·℃传热系数K换热面积m2换热面积换热裕量换热裕量最终换热面积m2最终换热面积实取换热面积m2实取换热面积板型板型单片换热面积m2单片换热面积板间流通面积m2板间流通面积所需流程21所需流程所需板片数所需板片数所需流道74.574.5所需流道流道数7475流道数实际板间流速m/s0.450.55实际板间流速Nu18439.6512212.39α1779425.77#########板片热阻4.50E-04水污垢热阻1.16E-06实际传热系数Kw/m2·℃实际传热系数KRe8606104.9396377893.34Eu445Re-0.1265.4912401767.8888951de(m)0.007阻力(MPa)0.0257170630.02069412BR0.1236.99464530350013.4510%14.80180.120.00081502209.381换热量1471230.984选用两台换热器Wkg/h每台换热器最少负荷1373506.62118121.6181725.520.032152每台换热器最少负荷1380889.78118756.5182702.320.032325运动粘度10^6温差导热系数比热容动力粘度Pr0.355250.67554.1980.0003442.1450.355250.67554.1980.0003442.1450.603100.64154.1740.0005973.9250.603100.64154.1740.0005973.925MW1.3809热侧冷侧水水℃9540℃7050t/h47.50296118.7574mm40.0040.00mm8080w/m2·℃m2m2m2m2m22174.574.57475m/s0.450.56高宽18322.2812249.711768099.58#########w/m2·℃6953158528288.7056405632.9965.5626627667.85354850.025281640.0208636510%14.6618BR0.121502209.3770.120.000836.99464530350013.331471228.13干管管径0.1793110.179792长344