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 10m 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 groundlevel pollutant concentrations. (b) Sketch the groundlevel, 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 10m 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 10m 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 groundlevel pollutant concentrations. (b) Sketch the groundlevel, 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 10m 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 15. 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;

Sketch the graph of the function. 1. g(x) = [x] 2 2. g(x) = [x + 4] 3. 4. (5 3, f(x) = 14 + 5, < 1 2 1 f(x) = 2 + 1, < 2 (2? + 1, > 2

Why do some marketers embrace the concept of relationship marketing?

In 2015, the city of San Francisco enacted an ordinance that required health warnings on advertisements for certain sugarsweetened beverages (SSBs) that read: WARNING: Drinking beverages with added...

Donated Services. Indicate whether each of the following donated services situations would require a journal entry for contribution revenue and a related expense or asset by circling Y for yes or N...

Scenario 17:Accountant 17 is the former manager of the audit dept. She says: when covid hit I decidedto retire. I was a cpa for 30 years but im no longer practicing, can I still call myself a cpa? Do...

Presented below is financial information related to the 2022 operations of Elliott Auto Repair. Instructions Compute net income in 2022 for Elliott Auto Repair. Maintenance and repairs expense...

You have just sold your house for $950,000 in cash. Your mortgage was originally a 30year mortgage with monthly payments and an initial balance of $740,000. The mortgage is currently exactly 18.5...

Hansen Industries purchased a machine that cost $ 5 0 0 , 0 0 0 . It is expected that the machine will last 1 5 years and have a $ 5 0 , 0 0 0 salvage value. a . Calculate the 1 st and 2 nd year of...

How do you allocate joint costs in accounting? In developing forecasts of expenses the analyst must take into consideration that expenses can be broken down into components. What is the difference...

What cultural variable can affect the decistion  making process?

Leon has a dedicated home workspace in the garage for his side gig. The workspace is 300 square feet, and the overall home is 2,400 square feet. Leon's 2022 expenses include the following: Mortgage...

Provide two examples of non  value  added costs for a public accounting firm such as EY or Deloitte. Using examples, explain how a public accounting firm can eliminate or reduce its non  value ...

For the given case study, do the following: Write Functional Requirement Write Nonfunctional Requirement Draw use case diagram and write use case description also Identify classes and draw class...

You are a U.S. investor who purchased British securities for 2,000 one year ago when the British pound cost U.S. $1.50. What is your total return (based on U.S. dollars) if the value of the...

A tubular bar with outside diameter d2 = 4.0 in. is twisted by torques T = 70.0 kin. (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...

Assume that the economy can experience four possible states: high growth, normal growth, recession, or depression. For each of those states, you expect the following stock market returns for the...

Suppose an investment pays off $800 or $1,600 with equal probability per $1,000 invested. What is the maximum leverage ratio you could have and still have enough to repay the loan in the event the...

The imposition of new trade tariffs has resulted in tensions between the United States and some of its major trading partners. Suppose you are a small business owner in the United States. a. How...
Study smarter with the SolutionInn App