凝汽器内保持较高的传热效率是提高真空、达到节能降耗、提高机组运行经济性的重要办法。在理想的情况下 ,如果忽略辐射传热 ,表面式凝汽器的总传热热阻由水侧对流换热热阻、管壁的纯导热热阻和汽侧的对流换热热阻 3部分组成。R总 =1πdlα1+ 12πlλlnd0d+ 1πd0 lα2(1 )式中 Condenser to maintain a high heat transfer efficiency is to increase the vacuum, to save energy and reduce consumption, improve unit operation economy an important way. Under ideal conditions, if the radiative heat transfer is ignored, the total heat transfer resistance of the surface condenser is determined by the thermal resistance of the water-side convection heat transfer, the thermal conductivity of the pure thermal conductivity of the pipe wall, and the thermal resistance of the convection heat transfer on the steam side composition. R total = 1πdlα1 + 12πlλlnd0d + 1πd0 lα2 (1) where