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分析比较了在换热器的优化设计中,当流体的比热或传热系数随温度变化时的对数平均温差(LMTD)和积分平均温差计算方法;同时对有关文献中已提出的近似计算方法进行了讨论,指出 Chen JJJ 提出的近似公式最适用于换热器的优化设计。
The method of calculating the logarithmic mean temperature difference (LMTD) and the integral average temperature difference when the specific heat or heat transfer coefficient of a fluid changes with temperature is compared and analyzed in the optimal design of the heat exchanger. Meanwhile, the approximate calculation Method is discussed. It is pointed out that the approximate formula proposed by Chen JJJ is most suitable for the optimal design of heat exchanger.