大温差冷却水对冷凝器传热系数的影响研究

Analysis of Shell-and-tube Condenser's Heat Transfer Coefficient under Large Temperature Difference Cooling Water

本文以江河水为冷却水,对典型的壳管式冷凝器的传热系数进行理论计算和分析。得出当冷却水流量恒定,冷却水进水温度为24-28℃,出水温度为37℃时,冷凝器传热系数随进水温度的降低而增大,且增长速度逐渐加快;当低温冷却水流量呈跳跃式减少时,冷凝器传热系数的增长有所下降,但仍远大于通常使用状态下的冷凝器传热系数。

This paper using river water as cooling water to theoretical calculation the heat transfer coefficient of shell-and-tube condenser. It works out that heat transfer coefficient of condenser grow fast with the drop of inlet water temperature when the flow of cooling water is constant, the cooling water temperature range between 24-28℃ and the outlet temperature is 37℃. When the flow of cooling water drops down, the increase of the heat transfer coefficient slows down, but it＇s still larger than normal condition.