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研究开发了用于火电厂的螺旋线圈型管式空气预热器。对螺旋线圈管的管内流动工况进行了分析和计算 ,并与普通光管的流动进行了对比。由计算可见 ,螺旋线圈管对流换热系数较普通光管提高 70 %～ 170 % ;预热器的总传热系数可提高 30 %以上。经在几十台锅炉上应用表明 ,效果显著
Research and development for the thermal power plant spiral coil tube air preheater. The flow conditions of the spiral tube in the tube were analyzed and calculated, and compared with the ordinary tube. It can be seen from the calculation that the convective heat transfer coefficient of the spiral coil tube is increased by 70% ~ 170% compared with that of the ordinary fluorescent tube; the total heat transfer coefficient of the preheater can be increased by more than 30%. After dozens of boilers application shows that the effect is significant