Calculation of Puff dispersion equation

LaTex

Keyword

Puff dispersion equation,calm condition,Downwind distance,Volume of emit gas,Wind speed,Effective chimney height,Stability categories

Reference

[1]：公害研究対策センター：『窒素酸化物総量規制マニュアル』,pp.152
[2]：社団法人土木学会：『環境工学公式・モデル・数値集』,pp.253

Remarks

・Concentration of emissions：C(x,y,z)
・Downwind distance(m)：x,y,z
・Applicable under calm condition(the wind speed is less than 0.4m/s).
・Coefficient

Stability		α	γ
Pasquill	Shir
A	-3	0.948	1.569
A～B	-3～-2	0.859	0.862
B	-2	0.781	0.474
B～C	-2～-1	0.702	0.314
C	-1	0.635	0.208
C～D	-1～0	0.542	0.153
D	0	0.470	0.113
E	1	0.439	0.067
F	2	0.439	0.048
G	3	0.439	0.029

History

・2010/09/21：Upload