Question: 1 0 ( b ) . To comply with the national standard of 7 5 g m 3 for P M 2 . 5 ,

10(b). To comply with the national standard of 75gm3 for PM2.5, how to design the height of the chimney? If the chimney will not be redesigned, is it possible to meet the requirement through adding a PM2.5 collector? What is the minimum collection efficiency? Assume the wind speed is constant at any effective stack height. (7 marks)
1 0 ( b ) . To comply with the national standard

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