Comparison of power-plant condenser cooling-water fouling rates for spirally-indented and plain tubes
Comparison of power-plant condenser cooling-water fouling rates for spirally-indented and plain tubes
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发表时间：
1991
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通讯作者：
T. Rabas;C. Panchal;D. Sasscer;R. Schaefer
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作者：
T. Rabas;C. Panchal;D. Sasscer;R. Schaefer
本文介绍了 12 个 TVA 发电厂冷凝器的结垢率，其中 9 个冷凝器采用增强管进行了重新安装。总传热系数是根据一年到十年期间记录的现场数据计算得出的。结垢阻力采用单独阻力法和冷凝单管努塞尔预测的管束修正系数进行计算。增强管的结垢率范围为普通管的大约相同到大约两倍。增强型管的热性能在一年多没有清洁的情况下仍然优于普通管。运行一年后，增强管的阻垢值均小于TEMA标准的最小值，而普通管的阻垢值始终小于该值的二分之一。停机清洁后，两个管子的热性能值基本上恢复到新的清洁水平。 28 条参考文献、9 张图、2 个标签。
This paper presents the fouling rates for twelve TVA power-plant condensers, nine of which were retubed with an enhanced tube. The overall heat-transfer coefficients were calculated from logged field data taken over periods from one to ten years. The fouling resistances were calculated with the separate-resistance method and with a bundle correction factor to the condensing, single-tube Nusselt prediction. The fouling rates with the enhanced tubes ranged from about the same as to about twice that of the plain tubes. The thermal performance with the enhanced tubes remained superior to that obtained with plain-tubes for more than a year without cleaning. After one year of operation, the enhanced-tube fouling resistance values were less than the minimum value of the TEMA Standards and the plain-tube fouling resistance values were always less than one half of this value. After shutdown cleaning, the thermal performance values for both tubes were restored to essentially the new, clean levels. 28 refs., 9 figs., 2 tabs.