环境工程原理修订材料(2007年)目录总结..........................................................................................................................................2第二章质量衡算与能量衡算.......................................................................................2第三章流体流动...........................................................................................................3第四章热量传递...........................................................................................................6第五章质量传递...........................................................................................................9思考题补充.............................................................................................................................11第二章质量衡算与能量衡算.....................................................................................11第三章流体流动.........................................................................................................11第四章热量传递.........................................................................................................12第五章质量传递.........................................................................................................12习题补充................................................................................................................................14第二章质量衡算与能量衡算.....................................................................................14第三章流体流动.........................................................................................................16第四章热量传递.........................................................................................................21第五章质量传递.........................................................................................................28中英文术语............................................................................................................................33第二章质量衡算与能量衡算.....................................................................................33第三章流体流动.........................................................................................................33第四章热量传递.........................................................................................................34第五章质量传递.........................................................................................................35总结第二章质量衡算与能量衡算一、单位换算二、常用物理量及其表示方法定义相关内容浓度质量浓度:ρA=mAV混合物总质量浓度:ρ=∑i=1Nρ质量分数*:xmA=mAm∑i=1Nxmi=1;气液两相体系:xmA——液相中某组分的质量分数;ymA——气相中某组分的质量分数;质量比:XmA=mAm−mAXmA与xmA换算:XmA=xmA1−xmA物质的量浓度:cA=nAVcA与ρA换算:cA=ρAMA摩尔分数:xA=nAn摩尔比:XA=nAn−nAXA与xA换算:XA=xA1−xA;气态:YA=pAp−pA流量体积流量:qV=VtqV与qm换算:qm=qVρ质量流量:qm=Vρt流平均流速:水处理:一般1L污水可近似认为等于1000g。1mg/L的质量分数为1mg/1000g=1×10-6=1ppm污水浓度过高时,1mg/L的质量分数为1×10-3÷混合物密度值大气污染控制工程:*环境工程中AAApMRTVV3101.质量衡算0mrq以某种元素或物质为对象21mmqq021Vkqqmmdtdmqqqmrmm212.能量衡算qFPEHHqQEQqHHFPmLQEQTmcQEpQ速um=∫AudAA=qVA通量单位时间、单位面积上通过...