柴油原油换热器方案设计书说明书.docVIP

化工原理课程设计 柴油加热器设计说明书 设计者：班级：化工084班 组长：张婷 成员：刘安东 钱生来 林斌 张权 日期 ：2011年6月20日 指导教师 邢进 设计成绩 日期 目录 一．设计说明书································································3二．设计条件及主要物性的确定···················································3 1．定性温度的确定·························································3 2．流体有关物性···························································3 三. 确定设计方案······························································4 选择换热器的类型······················································4 2．流程安排·······························································4 估算传热面积·····························································4 传热器的热负荷·······················································4 平均传热温差·························································4 传热面积估算·························································4 工程结构尺寸·····························································4 管径和管内流速························································4 管程数和传热管数······················································4 平均传热温差校正和壳程数··············································5 传热管排列和分程方法··················································5 壳程内径······························································6 折流板································································6 其他附件······························································6 接管··································································6 六．换热器核算·································································7 1.热流量核算·······························································7 （1）壳程表面传热系数···················································7 （2）管程表面传热系数···················································7 （3）污垢热阻和管壁热阻·················································8 （4）传热系数K·························································8 （5）传热面积裕度·······················································8 2.壁温核算·····