精品文档---下载后可任意编辑目 录第一章 流体流动与输送机械 ·····················································（2）第二章 非均相物系分离 ·························································（32）第三章 传热 ···································································（42）第四章 蒸发 ···································································（69）第五章 气体吸收 ·······························································（73）第六章 蒸馏 ···································································（95）第七章 固体干燥·······························································（119）精品文档---下载后可任意编辑 精品文档---下载后可任意编辑第三章 传热1、某加热器外面包了一层厚为 300mm 的绝缘材料，该材料的导热系数为（m ℃），已测得该绝缘层外缘温度为 30℃，距加热器外壁 250mm 处为 75℃，试求加热器外壁面温度为多少解：2、某燃烧炉的平壁由下列三种砖依次砌成；耐火砖 b1=230mm， 1= W/(m·℃)绝热砖 b2=230mm， 2=(m·℃)建筑砖 b3=240mm， 3=(m·℃) 已知耐火砖内侧温度为 1000℃，耐火砖与绝热砖界面处的温度为 940℃，要求绝热砖与建筑砖界面处的温度不得超过 138℃，试求：（1）绝热层需几块绝热砖； （2）普通砖外侧温度为多少解：（1）b2=230mm
