How much of a reduction in the automobile emission

Assignment Help Civil Engineering

Reference no: EM13211150

The maximum eight-hour average concentration of carbon monoxide (CO) in an urban area is measured to be 15 ppm. The NAAQS is 9 ppmv (equivalent to 10.3 mg/m3 estimated at P = 1 atm and T = 298.25 °K). Automobile emissions are believed to be the only major source of CO; it is assumed there is no background contribution for other sources. Assume also that CO can be modeled as chemically non-reactive over the period of interest. Answer the following questions:

a) If the average wind speed is 3m/s and the urban area has the dimension of 100 x 100 km with a mixing height of 500m, what is the steady state emission rate (mg/m2-s) of CO by the automobiles that would lead to the measured city air concentration of CO of 15 ppmv?

b)How much of a reduction in the automobile emission rate would be required to achieve the maximum eight-hour average NAAQS for CO at steady state 9ppmv (10.3 mg/m3)?

Reference no: EM13211150

Questions Cloud

Calculate the deflection of the beam : Also calculate the deflection of the beam to check that it complies with the design limit of L/200. Only variable actions are required for deflection check.

Calculate the deflection of the beam to check : Also calculate the deflection of the beam to check that it complies with the design limit of L/200. Only variable actions are required for deflection check.

What is the original estimated duration of the project : The initial schedule called for 500 feet of pipeline to be installed each week, with the total construction cost projected to be $25 million. After 8 weeks, 4750' of pipeline has been installed at a cost of $11.25 million.

Explain what effect would there be on the calculated value : What effect would there be on the calculated value for the molar enthalpy of dilution if the technician accidently used too much water so that the volume was actually more than 500 mL.

How much of a reduction in the automobile emission : How much of a reduction in the automobile emission rate would be required to achieve the maximum eight-hour average NAAQS for CO at steady state 9ppmv (10.3 mg/m3)?

How that impacts your financial plan : Explain your personal risk tolerance and how that impacts your financial plan and explain your time horizon and how that impacts your financial plan.

Explain how much water can be produced if the gases react : hydrogen and 6.8 * 10^-4 mol of oxygen. How much water can be produced if the gases react?

Hat is the probability that more than 2.5 inches : what is the probability that less than 0.5 inches of precipitation will occur in any January? What is the probability that more than 2.5 inches wil

Determine the maximum displacement of the plate : Determine the maximum displacement of the plate A if the billet strikes the plate with a speed of 8 . Neglect the mass of the springs, rollers and the plates A and B. Take = 4000 , = 40000 .

User Account

All Pages