Background knowledge Air Pollution Control Engineering According to the report,we can see that the main pollutant in the air is particulate.It is for sure that if we want to make the sky over us clean,we must find some efficient and possible ways to reduce the concentration of particulate to a acceptable level. First of all,we have to get some information and background knowledge about the meteorology... PDF文件使用"pdfFactory Pro”试用版本创建mm,fineprint..com,c里
Background knowledge According to the report, we can see that the main pollutant in the air is particulate. It is for sure that if we want to make the sky over us clean, we must find some efficient and possible ways to reduce the concentration of particulate to a acceptable level. * First of all, we have to get some information and background knowledge about the meteorology… Air Pollution Control Engineering PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn
Knowledge of atmosphere Air Pollution Control Engineering Vertical movement Density of the atmosphere Stability of the atmosphere Height of the mixed layer Horizontal movement Wind Polar heating and cooling Atmospheric Rotation of the Earth layer Land and Ocean Smog D月 Atmospheric Stranded inversion(逆温] *I really want to share this part with you just because it is very interesting, and maybe the next thing will even surprise you .. PDF文件使用"pdfFactory Pro”试用版本创建野，fineprint.com,c四
Density of the atmosphere Stability of the atmosphere Height of the mixed layer Polar heating and cooling Rotation of the Earth Land and Ocean Knowledge of atmosphere Atmospheric layer B E C D A Horizontal movement Vertical movement Wind Smog & Stranded Atmospheric inversion(逆温) ** I really want to share this part with you just because it is very interesting, and maybe the next thing will even surprise you … Air Pollution Control Engineering PDF 文件使用 "pdfFactory Pro" 试用版本创建 閕www.fineprint.com.cn
Air Pollution Control Engineering Vertical movement The density of the atmosphere will change while the temperature and humidity are changing. According to the ideal gas equation: Mp P= RT So,at certain height,the density is depended on M and T.If we take the fundamental equation of hydrostatic into consideration: p dz =P8 then we can get: dp __gMd (z is the height) p RT PDF文件使用"pdfFactory Pro”试用版本创建mm,fineprint..com,c里
Vertical movement The density of the atmosphere will change while the temperature and humidity are changing. According to the ideal gas equation: So, at certain height, the density is depended on M and T. If we take the fundamental equation of hydrostatic into consideration: then we can get: (z is the height) M p R T r = dp gM dz p RT = - dp g dz = -r Air Pollution Control Engineering PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn
Air Pollution Control Engineering Vertical movement While a air block is rising up,if we dT/dz is just the slop of the line. ignored the heat exchanged between it and other air,the 65.840t process can be 20.061m regarded as adiabatic and reversible.Of 88S Adiabatic air course we are familiar Standard air with such a process, we have the equation: 36.150t dp CdT 11.021m ò RT Then we get an important equation: dT gM -92.8℃ -56.5℃ 15℃ Temperature .135℉ 69.7T 59℉ d= adiabatic ideal PDF文件使用"pdfFactory Pro”试用版本创建ww,fineprint.com,cn
Vertical movement H eig h t a b o v e t h e s e a le v el, z T r o p osp h e ric la y e r Str atosp h e ric la y e r 65.840ft 20.061m 36.150ft 11.021m -92.8℃ -135℉ 15℃ 59℉ -56.5℃ -69.7℉ Temperature Adiabatic air Standard air Air Pollution Control Engineering While a air block is rising up, if we ignored the heat exchanged between it and other air, the process can be regarded as adiabatic and reversible. Of course we are familiar with such a process, we have the equation: Then we get an important equation: Cp dp dT p RT = - adiabatic ,ideal p dT gM dz C æ ö ç ÷ = - è ø dT/dz is just the slop of the line. PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn
Air Pollution Control Engineering The stability of the air Standard air:dT/dz=-6.5C/km=-3.6F/1000ft 6000t Tanaleas aup Adiabatic air:.dT/dz=-9.8℃/km=-5.4℉/1000t anoqe 1619H 3.00P.M 1000t Dawn+4h Dawn+2h Dawn Temperature 50F 90℉ When z <1000ft,we can see that the temperature of the air will rise up when it is higher and higher,such a phenomenon is called temperature inversion PDF文件使用"pdfFactory Pro”试用版本创建w.fineprint.com.cn
The stability of the air H eig h t a b o v e t h e s e a le v el, z Temperature 6000ft 1000ft 50℉ 90℉ Air Pollution Control Engineering Standard air: dT/dz=-6.5℃/km=-3.6℉/1000ft Adiabatic air: dT/dz=-9.8℃/km=-5.4℉/1000ft 3.00 P.M Dawn+4h Dawn+2h Dawn When z ≤1000ft, we can see that the temperature of the air will rise up when it is higher and higher, such a phenomenon is called temperature inversion. PDF 文件使用 "pdfFactory Pro" 试用版本创建 ÿwww.fineprint.com.cn ÿ