# Process Safety and Environmental Safety: Dispersion of pollution using the Gaussian Plume Modelling expression.

Process Safety and Environmental Safety: Dispersion of pollution using the Gaussian Plume Modelling expression. 150 150 Affordable Capstone Projects Written from Scratch

ENG_6_476 Coursework – Dr. Elsa Aristodemou 2017 -2018
Process Safety and Environmental Safety
ENG_6_476
Academic Year 2017 – 2018: Semester 2
Coursework: to be submitted via Turnitin
Dr. Elsa Aristodemou
Problem: Dispersion of pollution using the Gaussian Plume Modelling expression.
The Gausssian plume model is based on the assumptions that the distribution of pollutant concentrations at different distances from the source follow a Gaussian distribution; the model estimates time-independent solutions at various distances from the source, for different wind velocities, different chimney heights and different atmospheric conditions. The equation describing the concentration values is given by the expression – also known as the Pasquill-Gifford formula:
Where the various parameters have the following meanings:
▪ y and z = dispersion parameters in the y and z directions
▪ H = total height of release (in meters)
▪ C (x,y,z) is the pollutant concentration at location (x,y,z), kg m-3
▪ Q is the mass flow rate of release, (in kg per second).
▪ u is the wind velocity in x direction, (n m/s)
(a) Implement the equation in an Excel file
(b) Determine the variation of Concentration for a pollutant as a function of distance – with x-distance varying from 100 m to 5000m (at intervals of 50 m) for the following conditions:
(i) Y-distance varying from 0m to 200m at height z=0m
(ii) Y-distance varying from 0m to 200 m at height z=15m.
(iii) Y-distance varying from 0m to 200m at height z=40m.
2222222222zzyzyHzexpHzexpyexpuQ)z,y,x(C
ENG_6_476 Coursework – Dr. Elsa Aristodemou 2017 -2018
Note: In your model, consider the following atmospheric conditions:
(i) Wind velocity = 1 m/s; Day time, cloudy skies.
(ii) Wind velocity = 1 m/s; Night sky, clear skies.
(iii) Q = 0.1 kg/s in all cases; H = 30m.
Task 3: Plot your results in a 2D-map – with horizontal axis being the x-distance, whilst the y-axis being the y-distance. Highlight the main contour values so that your plume is highlighted.
Report: Your results are to be presented in the form of a report – no more than 10 pages long.
Submission date: 30th of April 2018
Coursework weighting: This work will account for 15% of the overall module mark.
Please Note: Plagiarism is punished quite severely at LSBU.
******END OF COURSEWORK*******
Dr Elsa Aristodemou
February 2018

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