Air Pollution and Greenhouse Gases by Zhongchao Tan | 9789812872111 | 9812872116 | Holooly

Air Pollution and Greenhouse Gases

57 SOLVED PROBLEMS

Question: 3.10

Adiabatic Flame Temperature CH4 is pre-mixed with air at 298 K at an equivalence ratio of 1.0 and the combustion is complete. Determine the constant pressure AFT. ...

Verified Answer:

First of all, set up stoichiometric combustion rea...

Question: 12.2

Oxyfuel computation flame temperature In Sect. 3.5.1, we calculated the adiabatic flame temperature of CH4 burned with air at 298 K, when they are premixed perfectly with an equivalence ratio of 1.0 and the combustion is complete. Now let us redo the calculation using pure oxygen instead of air. ...

Verified Answer:

First of all, set up stoichiometric combustion rea...

Question: 15.1

Sampling location in stack A stack with an inner diameter of 1.2 m is subject to source emission tests. Determine the sampling points by dividing the stack area into three equal sub-areas. ...

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In this problem, n = 3 and D = 1.2 m are given. Th...

Question: 14.4

Transient indoor air pollutant concentration Consider a commercial kitchen with a volume of 80 m³ where natural gas is used as a cooking fuel. Assume that after cooking the indoor fume concentration is 1,000 μg/m³. The HVAC system works with a fresh air flow rate of 10 m³/s and an internal ...

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The problem is simplified by ignoring the outdoor ...

Question: 14.3

Ventilation rate calculation There are 20 people in a dinning room, each produces 200 W total heat. The carbon dioxide concentration in the supply air is 500 ppmv. Assume the supply air temperature is 15 °C and relative humidity 50 %. The room air is to be maintained at 22 °C and 60 % relative ...

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Based on the supply air temperature of 15 °C and 5...

Question: 14.2

Cleanroom class calculation An ISO 146441-1 Class 2 cleanroom is 3 m high with a total floor area of 100 m², what is the maximum amount of particles that are larger than 100 nm in diameter? ...

Verified Answer:

Substitute

d^{*}_{p}

= 100 nm = 0.1...

Question: 14.1

Threshold limit value In a welding shop, the measured concentrations of CO, CO2 and welding fumes are 10, 1,500 ppmv and 3.5 mg/m³, respectively, all below the recommended TLV-TWA. Is this working environment safe to the workers daily based on normalized concentration? ...

Verified Answer:

TLV-TWA can be found in Table 14.2. And they are l...

Question: 13.4

Stokes numbers of nanoaerosol particles Estimate the Stokes numbers of nanoaerosol particles with an aerodynamic particle diameter of 100 nm in standard air flowing at 1 m/s perpendicular to a cylinder of diameter 1 cm. ...

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Given

U_{0} = 1 m/s, d_{c} = 1 cm, ρ_{p} ...

Question: 13.3

Nanoaerosol adhesion efficiency Calculate the adhesion efficiency using the DMT model with the following properties of a glass fiber filter for NaCl nanoparticles 1–100 nm when filter fiber diameter df = 5 μm. ...

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For salt particles and glass fiber filter

H...

Question: 13.2

Specific adhesion energy Estimate the specific adhesion energy between a NaCl particle and a glass fiber ...

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For salt particles and a glass fiber filter, [late...

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