采用统一的方法对定态传热逆流和并流的平均温差进行了推导。
Mean temperature difference for countercurrent flow and cocurrent flow in steady continuous heat transfer has been deduced uniformly.
在相同工况下,逆流时对数平均温差最大,顺流时最小,混合流型介于二者之问。
Under the same conditions, when the logarithmic mean temperature difference between upstream maximum downstream, the smallest of the mixed flow pattern between the two asked.
结果表明:逆流操作的净化效率高于顺流,气(液)体流量对出、进口气(液)体温差有较大影响。
The result shows that the purification efficiency is higher under counter current operation than that under co-current operation.
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