Air Quality Monitoring and Control Assignment 1 Guidelines 1. Carefully read through items 3.2A, 3.2B and 3.2C of Reading materials (can be downloaded from the Course web site, Learning@Griffith) 2. Choose a number of traverse points by using Figure 2 on page 3 and the information about stack diameters upstream and downstream from flow disturbance 3. Estimate locations of traverse points by using Table 1 on page 4 and fill the Table (item 3, p.1 ) 4. Average numbers from the Table (item 7, p.1) and estimate the actual velocity of the air in the stack by using Equation (1) on the last page. All values used in Equation (1) are given except the molecular weight, which is supposed to be estimated as an additive of molecular weights of the components (air- 29; CO2 - 44; H2O - 18). 5. Volumetric % of H2O could be obtained from the diagram (1) on page 5. You are given dew-point temperature, which is related to 100% saturation of air. Then you consider the interception of the 100% saturation curve (highlighted by red) with the temperature line corresponding to your dew-point value (the temperature line starts from vertical axis). Assuming that your dew point temperature is 30 degrees, the corresponding line is shown in green. From the interception point, you can draw a vertical line and get the amount in kg/kg of moisture in the air (see blue line). The result for 30 degrees dew point temperature is approximately 0.026 kg/kg. Then, you need to convert kg/kg to vol%. Use Ideal Gas Law to undertake this conversion. The next step is to subtract % contributions of CO2 (vol% of CO2 is given in item 6, p. 1) and H2O from 100% mixture to get the concentration of air (the fact that the concentration of oxygen could be lower than 21% due to combustion could be neglected). 6. The value estimated for the air velocity by Equation 1 represents the actual velocity of the hot gas in the stack. To estimate isokinetic suction flowrate (velocity of the gas in the stack must be the same as the velocity at the inlet to the sampling nozzle), firstly normalise parameters of the ait for 25 degr C (use Ideal Gas Law for this procedure) and then estimate the flow rate for the nozzle with the diameter provided in item 3 on p.2. 7. Estimate the total volume of the air sample and concentration of particles per 1 normal cubic meter. 8. The final product of your calculations is the Results table on page 2 with all numbers written in it.