A passive and chemically inert pollutant is emitted from a chimney of height h (= 120...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
A passive and chemically inert pollutant is emitted from a chimney of height h (= 120 m) and diameter d (= 0.8 m) into the atmosphere of ambient temperature T. (= 298 K). The pollutant emission rate, discharge velocity and temperature are Q (= 2,000 kg hr ¹), v (= 10 m s¹) and To (= 398 K), respectively. The wind speed at 10-m elevation is u10 (= 1.8 m s¹) and the incoming solar radiation is strong. The surrounding land type is rural. (a) Calculate: (i) The wind speed at the chimney height u(z = h); (ii) The plume rise Ah; and (iii) The maximum ground-level pollutant concentrations. (b) Sketch the ground-level, centreline concentrations C(x, y=0, z = 0) for 10¹ km ≤x≤ 1 km. (c) Briefly explain why increasing wind speed leads to less unstable and less stable, respectively, in the daytime and nighttime atmosphere as tabulated in Table Q6(a). Note: The following equations, tables and figures are provided for your information. (i) Power law of Deacon u(z) = ₁0² 10, (6a) where z is the height (m), p the wind profile exponent, u(z) the wind speed at height z and u10 the wind speed at 10-m altitude. A passive and chemically inert pollutant is emitted from a chimney of height h (= 120 m) and diameter d (= 0.8 m) into the atmosphere of ambient temperature T. (= 298 K). The pollutant emission rate, discharge velocity and temperature are Q (= 2,000 kg hr ¹), v (= 10 m s¹) and To (= 398 K), respectively. The wind speed at 10-m elevation is u10 (= 1.8 m s¹) and the incoming solar radiation is strong. The surrounding land type is rural. (a) Calculate: (i) The wind speed at the chimney height u(z = h); (ii) The plume rise Ah; and (iii) The maximum ground-level pollutant concentrations. (b) Sketch the ground-level, centreline concentrations C(x, y=0, z = 0) for 10¹ km ≤x≤ 1 km. (c) Briefly explain why increasing wind speed leads to less unstable and less stable, respectively, in the daytime and nighttime atmosphere as tabulated in Table Q6(a). Note: The following equations, tables and figures are provided for your information. (i) Power law of Deacon u(z) = ₁0² 10, (6a) where z is the height (m), p the wind profile exponent, u(z) the wind speed at height z and u10 the wind speed at 10-m altitude.
Expert Answer:
Answer rating: 100% (QA)
Lets break down each part of the problem a Calculations i Wind speed at chimney height uh using the ... View the full answer
Related Book For
Posted Date:
Students also viewed these mechanical engineering questions
-
A cylindrical brick chimney of height H weighs w = 825 lb/ft of height (see figure). The inner and outer diameters are d1 = 3 ft and d2 = 4 ft, respectively. The wind pressure against the side of the...
-
The following additional information is available for the Dr. Ivan and Irene Incisor family from Chapters 1-5. Ivan's grandfather died and left a portfolio of municipal bonds. In 2012, they pay Ivan...
-
What will be the value of x after executing the following java statement? Assume that value of x is 5 before the execution. x += x++ - 5;
-
In recent years, the United States has experienced large increases in oil production due in large part to a new technology, hydraulic fracturing ("fracking"). Fracking involves injecting a mixture of...
-
In an article about investment alternatives, Money magazine reported that drug stocks provide a potential for long-term growth, with over 50% of the adult population of the United States taking...
-
Differentiate between Type I and Type II errors.
-
How would you evaluate this team based on each of the seven characteristics of effective groups?
-
1) The company issued common stock in exchange for $4,900 cash. Describe the effects of this transaction on the accounting equation in terms of debits and credits Assets Prepare the appropriate...
-
Consider a coal plant with the following characteristics: Capital cost of $3300 per kW CCF of 0.13 FOM costs of $103 per kW-year Fuel costs of $1.07 per GJ Utilization of 72% (about 6312 hours per...
-
A tensile stress is to be applied along the long axis of a cylindrical brass rod that has a diameter of 10 mm (0.4 in.). Determine the magnitude of the load required to produce a 2.5x 10 mm (10 in.)...
-
1. What was the relative purity of your GST::EGFP protein (elution) sample as compared to the (raw) whole cell lysate? Estimate the % nucleic acid amount using the chart handout
-
One form of the equation AEtotal = AEsys + AEsum =0, as discussed in the experimental introduction, 1591+92 +93 +9n-0. In this experiment, the system is the reaction and the surroundings are...
-
How many ester bonds are formed when a triglyceride is made
-
5 Consider the reaction A + 2B C whose rate at 25C was measured using three different sets of initial concentrations as listed in the following table: [A] | [] (M) (M) 0.40 0.010 1.9x10 2 0.40 0.020...
-
QUESTION 5 (a) Define the term Magnification Factor (MF) and explain why it is important to determine the Magnification Factor (MF) of a system. [CO1/PO1/C2] (5 marks) (b) Figure Q5(a) shows a system...
-
9. Given the following information regarding a project involving an initial public offering (IPO): Duration Preceding (weeks) Activity Activities a. Check feasibility b. Determine funding c. Find...
-
Discrete sample spaces: suppose there are N cable cars in San Francisco, numbered sequentially from 1 to N. You see a cable car at random; it is numbered 203. You wish to estimate N. (See Goodman,...
-
A tubular bar with outside diameter d2 = 4.0 in. is twisted by torques T = 70.0 k-in. (see figure). Under the action of these torques, the maximum tensile stress in the bar is found to be 6400 psi....
-
A uniform bar AB of weight W = 25 N is supported by two springs, as shown in the figure. The spring on the left has stiffness k1 = 300 N/m and natural length L1 = 250 mm. The corresponding quantities...
-
A circular cylindrical steel tank (see figure) contains a volatile fuel under pressure. A strain gage at point A records the longitudinal strain in the tank and transmits this information to a...
-
The von Neumann entropy satisfies a further inequality among three systems called strong subadditivity. \({ }^{20}\) As with subadditivity, strong subadditivity is only a property of the von Neumann...
-
We had stated in this chapter that the general Rnyi entropies do not satisfy subadditivity; only the von Neumann entropy does. In Example 12.2 , we constructed an explicit counterexample for the Rnyi...
-
In our analysis of hydrogen in Chap. 9, we discussed the period of recombination, the time in the history of the universe at which protons and electrons became bound and formed neutral hydrogen. We...
Study smarter with the SolutionInn App