Determine the effective height of a stack needed

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Reference no: EM134028628

Problem

I. What is the volume fraction of water in air at 30 °C, 1 atm, and RH = 75%? What is the dew point?

II. Find the atmospheric pressure at 2000 m given that the surface conditions are 20 ? and 1 atm, assuming a) dry air and b) humid air.

III. Wind speed was measured to be 2.3 m/s at a 10 m height. Determine the difference in wind speed at 500 m between an urban and a rural location for a B Pasquill stability class.

IV. Estimate the temperature at 1000 m given a surface temperature of 22 °C for a clear sunny day with a gentle breeze. Get the instant assignment help.

V. A weather balloon is released and later reports a temperature of 8 ? and pressure of 0.900 atm. The surface temperature was 16 ? and pressure 0.995 atm. Determine the atmosphere stability class, assuming the temperature profile is constant.

VI. Determine the downwind concentration [μg/m3] of PM 800 m from a rural ground level source if emission rate is 30.0 g/s. The midday weather is sunny with a gentle breeze.

VII. Determine the 1 km downwind ground level concentration of PM [μg/m3] from an urban power plant which burns 3 ton/hr of bituminous coal containing 5.5% ash, and having 99% PM removal. The source emits from a stack with effective height 100 m. The wind at the stack height is 6 m/s and the atmospheric stability is class C.

VIII. Determine the effective height of a stack needed to keep the maximum ground level ambient air concentration below 10 μg/m3 from a source that emits 12 g/s of NOx in a rural area with wind speed 4 m/s measured at the stack height, and moderately stable air.

IX. Consider the NOx emissions from two rural sources. The second source is located 500 m south and 500 m east of the first source. Source 1 emits 20.5 g/s and has an effective height of 100 m. Source 2 emits 35 g/s and has an effective height of 150 m. Sketch the locations of the stacks and the receptor site. Determine the concentration at a receptor located 4 km east and 200 m south of source one. Atmospheric conditions are neutral with a westerly wind of 5 m/s measured at 10 m.

Reference no: EM134028628

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