problem 1: Consider the dangers of using a camp stove inside an enclosed space like a tent. Test data show that a high heat liquid fuel camp stove can dramatically increase CO mixing ratios. For one brand of stove, CO increased to 130 ppmv in 15 minutes. The tent volume was 0.59 m^{3} tent and the air exchange rate was 2 hr^{-1} with tent zipped up. The initial and outside air CO mixing ratio was 0.1 ppmv. Use P = 0.8 atmospheres, and an air temperature of 5 °C.
a) find out the CO emission rate from the stove.
b) After it reached 130 ppmv the stove was turned off. find out the CO mixing ratio 10 minutes later.
problem 2: The town of Smog, Idaho is located in a river valley and has a footprint of 6 km x 2 km. It has an average daily emission rate of 1000 kg/day of PM_{2.5} into the atmosphere from wood burning stoves. The background concentration of PM_{2.5} is 0.5 µg/m^{3}. During a cold winter day in Smog, the mixing height is only 50-m and the average wind speed is 2 m/s entering perpendicular to 2 km dimension. Assume no depositional loss for PM_{2.5}.
a) What is the steady state concentration of PM_{2.5} in this air shed?
b) Does this meet the NAAQS standard?
problem 3: A stack emitting 85 g/s of NO has an effective stack height of 100 m. The wind speed is 3 m/s at 10 m, and it is a cloudy summer day. Estimate ground level NO concentration:
a) Directly downwind at a distance of 3 km.
b) At the point downwind where NO is a maximum.
c) At a point located 2 km downwind and 0.1 km off the downwind axis.
problem 4: The Centralia power plant emits SO_{2} at the rate of 150 g/s. It has an effective stack height of 50 m. Surface winds at 10 m are steady at 2.5 m/s and it is a fall afternoon.
a) find out the ground level SO_{2} concentration in ug/m^{3} at a point 4 km downwind and 0.1 km in the cross wind direction.
b) What is the maximum downwind concentration and at what distance does this occur?
c) There is a town with an SO_{2} monitor 20 km downwind of the power plant. How large can Q in g/s be if SO_{2} concentrations are to be kept below 365 ug/m^{3} for the conditions listed