总传热系数经验值.doc

浸没在液体中的盘管总传热系数大致值.W/(m2.)热侧冷侧清洁表面的K值考虑到常见污垢情况下的K值自然对流强制对流自然对流强制对流加热时应用蒸汽水溶液142018401700312057011408501560蒸汽轻油280400625790270260340620蒸汽中质润滑油230340570738200230280570蒸汽6号柴油11023040051085170340460蒸汽焦油或沥青8520028040085140220340蒸汽熔融蜡200260260310110200200260蒸汽熔融蜡200260260310140200200280蒸汽空气或气体102028365172345蒸汽糖蜜或谷物糖浆11022040051085170340460高温热水水溶液65080011001420400570620910高温传热油焦油或沥青7017026037057110170280导热姆或亚老哥尔焦油或沥青8517028034068114170280冷却时应用水水溶液62077011101390370540600880水淬火油5785140260405785140水中质润滑油4568110170284557110水糖蜜或谷物糖浆405710015023404585水空气或气体112328576182346氟利昂或氨水溶液200260340510110200230340钙或钠盐水水溶液5706809901140280430460710带有夹套的容器总传热系数大致值.W/(m2.)夹套内的流体容器内的流体传热壁材料K值夹套内的流体容器内的流体传热壁材料K值蒸汽水不锈钢8501700蒸汽水玻璃衬里碳钢400570蒸汽水溶液不锈钢4501140蒸汽水溶液玻璃衬里碳钢285480蒸汽有机液不锈钢285850蒸汽有机液玻璃衬里碳钢170400蒸汽轻油不锈钢340910蒸汽轻油玻璃衬里碳钢230425蒸汽重油不锈钢57285蒸汽重油玻璃衬里碳钢57230盐水水不锈钢2301625盐水水玻璃衬里碳钢170450盐水水溶液不锈钢200850盐水水溶液玻璃衬里碳钢140400盐水有机液不锈钢170680盐水有机液玻璃衬里碳钢115340盐水轻油不锈钢200740盐水轻油玻璃衬里碳钢140370盐水重油不锈钢57170盐水重油玻璃衬里碳钢57170传热油水不锈钢2851140传热油水玻璃衬里碳钢170450传热油水溶液不锈钢230965传热油水溶液玻璃衬里碳钢140400传热油有机液不锈钢170680传热油有机液玻璃衬里碳钢140370传热油轻油不锈钢200740传热油轻油玻璃衬里碳钢115400传热油重油不锈钢57230传热油重油玻璃衬里碳钢57200空气冷却器总传热系数大致值.W/(m2.)冷凝K值液体冷却K值气体冷却操作压力kPa(表压)压力降kPaK值氨625机器夹套水710空气或烟道气3450.73.557氟利昂-12400柴油14069013.8110汽油460轻瓦斯油37069034170轻碳氢化合物510轻碳氢化合物480碳氢化合物气体2417200430轻石脑油40086221200重石脑油370重整炉液流400690034460重整反应器废气400残油85氨反应器流体480低压蒸汽770焦油40塔顶蒸汽370各蒸发器的总传热系数蒸发器形式总传热系数W/(m2.K夹套式3502330盘管式5803000水平管式(蒸汽管内冷凝)5802330水平管式(蒸汽管外冷凝)5804700中央循环管式5803000带搅拌的中央循环管式12005800悬筐式5803500旋液式9301750强制循环型12007000倾斜管式9303500升膜式5805800降膜式12003500外加热式12005800刮膜式(粘度1100cP)17507000刮膜式(粘度100010000Cp)7001200叠片离心式35004700钢及有色金属的热导率W/(m)类别温度,0100200300400500600700800900100011001200低碳钢-55.652.748.545.040.837.134.230.127.327.728.529.8中碳钢-49.348.145.642.439.135.732.426.226.026.928.029.5高碳钢-46.544.040.837.735.032.329.224.125.226.527.929.4铬钢44.842.239.336.4-32.6-26.7-锰钢41.540.038.837.035.234.330.926.4-铬硅钢-38.7-35.933.532.6-26.7-铬锰钢41.541.539.439.036.334.933.732.6-铬钼钢43.841.941.339.436.532.329.829.128.5-铬钨钢52.348.7-45.441.9-铬镍钢38.437.936.836.834.532.428.027.226.427.72