总传热系数经验值

1、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1、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10-2028-365-1723-45蒸汽糖蜜或谷物糖浆11022040

2、051085170340460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85170280340681141702802、冷却时应用水水溶液62077011101390370540600880水淬火油57-8514026040-5785140水中质润滑油45-6811017028-4557110水糖蜜或谷物糖浆40-5710015023-4045-85水空气或气体11-2328-576-1823-46氟利昂或氨水溶液200260340510110200230340钙或钠盐水水溶液57

3、06809901140280430460710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

4、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氟禾J昂-12400柴油14069013.8110汽油4

5、60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重心脑油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370四、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35023305803000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悬隹式5803500旋液式9301750强制循划、型12007000倾斜管式9303500升膜式58058

6、00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裳10*8套式排热用作冷却时的不值而，冷却物料冷却对传电M材料总铃络系敷KW/(m*C)*.备隹水水1745-2900水处水8S01700，内，外震速为0915-2.44m/CO1水fl530裳10*9套式捶热。用作加热时的K值为:被加热科加*1介朋伸能面材料8传熊系敷KWAm1eC)备注水热水7702440水减逮0.530m/$熊水流速0.52.5m/$次.空气焦水铜140430裳1JJ10套式换母用作热交投时的K值范X交换物

7、料热交换介质传培面材料总传热系数KW/(m2eC)备注水赴水8701745管内.外流速l.25m/s水拉水%290-2330水源速03-l5m/s注水源速03l0m/s液体液体815174520%扶陵35%拄，石5801045套式阶型丁烷水525丁坡施遮0.6mA水滤速hn/s碳氧化合物热水230-500管内为热水油类液体10S-815原油石油210-280原油流速13-2lm/s出清油水87M*Nl0.0Sm/s水海速0an/s灯油水230灯油流速O.lSm/6水次速06m/*10-4-11套式换筋用作冷时的K值范冷凝物料冷却制传热闻材料.总传为系数KW/(m,。备注氮蒸气水1280-198

8、0水流速L2m/s氮蒸气水1630-2330水流速L8m/s找蒸气水1980-2675水流速24m/s钢及有色金属的热导率W/(m-C)类别温度，c0100200300400500600700800900100011001200低碳钢55.652.748.5445.040.837.134.230.127.32.7.728.5298中碳钢49.348.145.64；2.439.135.732.426.226.026.928.029.5高碳钢-46.5/44.040.83-7.735.032.329.224.125.22.6.5277.9294铭钢44.842.239.336.4-32.6-26.7-钻钢41.5,40.038.837.035.234.330.9)26.4-铭硅钢-38.7-35.933.532.61-26.7-铭锐钢41.541.539.439.036.334.933.732.6-铭铝钢43.841.941.33).436.532.329.8；29.128.5-铭鸨钢52.348.7-45.441.9-铭锲钢38.437.936.8365.834