实用标准文案大全目录前言················································2第一部分，甲苯冷凝器的设计一、设计任务···········································4二、设计要求··········································4三、工艺结构尺寸·······································6（1）管径和管内流速·······························6（2）管程数和传热管数·····························6（3）平均传热温差校正及壳程数·····················6（4）传热管的排列和分程数法·······················7（5）壳体内径·····································7四、换热器主要传热参数核算·····························8（1）计算管程对流传热系数··························8（2）计算壳程对流传热系数··························8（3）确定污垢热阻··································9（4）总传热系数····································9第二部分，甲苯冷却器的设计一、试算并初选换热器规格·······························11（1）流体流动途径的确定···························11（2）确定流体的定性温度、物性数据，并选择列管换热器的型式·····································11二、计算总传热系数····································11（1）计算热负荷···································11（2）冷却水用量···································12（3）计算平均传热温度差···························12（4）总传热系数K·································12（5）估算换热面积·································12三、工艺结构尺寸·······································12（1）管径和管内流速································12（2）管程数和传热管数······························12（3）平均传热温差校正及壳程数······················13（4）传热管的排列和分程方法························14（5）壳体内径······································14四、换热器主要传热参数核算·····························15(1)壳程对流传热系数·····························15(2)管程对流传热系数·····························16(3)基于管内表面积的总传热系数···················16(4)计算面积裕度·································17实用标准文案大全化工原理课程设计任务书一、设计任务题目＃＃．＃万吨/年甲苯精馏塔冷凝冷却(水冷)换热系统工艺设计。二、任务给定条件1.热流条件：流量为10500kg/h的甲苯蒸汽从120℃，0.14MPa(绝压)冷凝到120℃，0.14MPa(绝压)甲苯液，再冷却到30℃；120℃甲苯汽相热焓140Kcal/Kg，液相焓53Kcal/Kg，30℃甲苯液相焓13Kcal/Kg；定性温度80℃时甲苯密度810Kg/m3,比...
