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换热器在折流或错流操作时的平均温差如何计算？
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换热器在折流或错流操作时的平均温差如何计算？
时间：2022-06-11 10:02
关键词：
大学试题
工学
化工原理
化学工程
答案解析
①根据冷、热流体的进、出口温度，算出纯逆流条件下的对数平均温度差；②按下式计算因数R和P： <br>③根据R和P的值，从算图中查出温度差校正系数； <br>④将纯逆流条件下的对数平均温度差乘以温度差校正系数，即得所求的。
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